diff --git a/app/Actions/Tickets/ListAssignedTicketsByVisibleProject.php b/app/Actions/Tickets/ListAssignedTicketsByVisibleProject.php
new file mode 100644
index 0000000..f31200a
--- /dev/null
+++ b/app/Actions/Tickets/ListAssignedTicketsByVisibleProject.php
@@ -0,0 +1,57 @@
+<?php
+
+namespace App\Actions\Tickets;
+
+use App\Actions\Projects\ListVisibleProjects;
+use App\Http\Resources\ProjectResource;
+use App\Http\Resources\TicketResource;
+use App\Models\Project;
+use App\Models\Ticket;
+use App\Models\User;
+use Illuminate\Database\Eloquent\Collection as EloquentCollection;
+use Illuminate\Support\Collection;
+
+class ListAssignedTicketsByVisibleProject
+{
+    public function __construct(
+        private readonly ListVisibleProjects $listVisibleProjects,
+    ) {}
+
+    /**
+     * @return array<int, array{project: array<string, mixed>, tickets: array<int, array<string, mixed>>}>
+     */
+    public function handle(User $viewer, User $assignee): array
+    {
+        /** @var EloquentCollection<int, Project> $visibleProjects */
+        $visibleProjects = $this->listVisibleProjects->handle($viewer);
+        $visibleProjectIds = $visibleProjects->pluck('id')->all();
+
+        if ($visibleProjectIds === []) {
+            return [];
+        }
+
+        /** @var Collection<int, Collection<int, Ticket>> $ticketsByProject */
+        $ticketsByProject = Ticket::query()
+            ->where('assignee_user_id', $assignee->id)
+            ->whereIn('project_id', $visibleProjectIds)
+            ->with([
+                'assignee',
+                'project',
+                'ticketPriority',
+                'ticketStatus.boardColumn',
+                'ticketType',
+            ])
+            ->orderByDesc('sequence_number')
+            ->get()
+            ->groupBy('project_id');
+
+        return $visibleProjects
+            ->filter(fn (Project $project): bool => $ticketsByProject->has($project->id))
+            ->map(fn (Project $project): array => [
+                'project' => ProjectResource::make($project)->resolve(),
+                'tickets' => TicketResource::collection($ticketsByProject->get($project->id))->resolve(),
+            ])
+            ->values()
+            ->all();
+    }
+}
diff --git a/app/Actions/UserApplications/CreateUserApplication.php b/app/Actions/UserApplications/CreateUserApplication.php
new file mode 100644
index 0000000..4d8b8ed
--- /dev/null
+++ b/app/Actions/UserApplications/CreateUserApplication.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Actions\UserApplications;
+
+use App\Models\User;
+use App\Models\UserApplication;
+use Illuminate\Support\Arr;
+
+class CreateUserApplication
+{
+    /**
+     * @param  array{name: string}  $validated
+     * @return array{application: UserApplication, plain_text_key: string}
+     */
+    public function handle(User $user, array $validated): array
+    {
+        $plainTextKey = UserApplication::generatePlainTextKey();
+
+        $application = UserApplication::query()->create([
+            'key_hash' => UserApplication::hashKey($plainTextKey),
+            'name' => Arr::get($validated, 'name'),
+            'user_id' => $user->id,
+        ]);
+
+        return [
+            'application' => $application,
+            'plain_text_key' => $plainTextKey,
+        ];
+    }
+}
diff --git a/app/Actions/UserApplications/DeleteUserApplication.php b/app/Actions/UserApplications/DeleteUserApplication.php
new file mode 100644
index 0000000..f9bcead
--- /dev/null
+++ b/app/Actions/UserApplications/DeleteUserApplication.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Actions\UserApplications;
+
+use App\Models\UserApplication;
+
+class DeleteUserApplication
+{
+    public function handle(UserApplication $application): string
+    {
+        $name = $application->name;
+
+        $application->delete();
+
+        return $name;
+    }
+}
diff --git a/app/Http/Controllers/Api/UserAssignedTicketController.php b/app/Http/Controllers/Api/UserAssignedTicketController.php
new file mode 100644
index 0000000..cbd01cb
--- /dev/null
+++ b/app/Http/Controllers/Api/UserAssignedTicketController.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Http\Controllers\Api;
+
+use App\Actions\Tickets\ListAssignedTicketsByVisibleProject;
+use App\Http\Resources\UserResource;
+use App\Models\User;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class UserAssignedTicketController extends ApiController
+{
+    public function __construct(
+        private readonly ListAssignedTicketsByVisibleProject $listAssignedTicketsByVisibleProject,
+    ) {}
+
+    public function __invoke(Request $request, User $user): JsonResponse
+    {
+        $viewer = $this->authenticatedUser($request);
+
+        $assignedTickets = $this->listAssignedTicketsByVisibleProject->handle($viewer, $user);
+
+        return response()->json([
+            'data' => $assignedTickets,
+            'meta' => [
+                'assignee' => $assignedTickets === []
+                    ? null
+                    : UserResource::make($user)->resolve(),
+            ],
+        ]);
+    }
+}
diff --git a/app/Http/Controllers/Settings/UserApplicationController.php b/app/Http/Controllers/Settings/UserApplicationController.php
new file mode 100644
index 0000000..52509f0
--- /dev/null
+++ b/app/Http/Controllers/Settings/UserApplicationController.php
@@ -0,0 +1,57 @@
+<?php
+
+namespace App\Http\Controllers\Settings;
+
+use App\Actions\UserApplications\CreateUserApplication;
+use App\Actions\UserApplications\DeleteUserApplication;
+use App\Http\Controllers\Controller;
+use App\Http\Requests\Settings\StoreUserApplicationRequest;
+use App\Http\Resources\UserApplicationResource;
+use App\Models\UserApplication;
+use Illuminate\Http\RedirectResponse;
+use Illuminate\Http\Request;
+use Inertia\Inertia;
+use Inertia\Response;
+
+class UserApplicationController extends Controller
+{
+    public function __construct(
+        private readonly CreateUserApplication $createUserApplication,
+        private readonly DeleteUserApplication $deleteUserApplication,
+    ) {}
+
+    public function edit(Request $request): Response
+    {
+        return Inertia::render('settings/Applications', [
+            'applicationKey' => $request->session()->get('applicationKey'),
+            'applications' => UserApplicationResource::collection($request->user()->userApplications)->resolve(),
+            'status' => $request->session()->get('status'),
+        ]);
+    }
+
+    public function store(StoreUserApplicationRequest $request): RedirectResponse
+    {
+        $result = $this->createUserApplication->handle($request->user(), $request->validated());
+
+        return to_route('applications.edit')
+            ->with('applicationKey', $result['plain_text_key'])
+            ->with('status', "{$result['application']->name} was created. Save this key now; it will not be shown again.");
+    }
+
+    public function destroy(Request $request, UserApplication $userApplication): RedirectResponse
+    {
+        $this->abortUnlessOwner($request, $userApplication);
+
+        $name = $this->deleteUserApplication->handle($userApplication);
+
+        return to_route('applications.edit')
+            ->with('status', "{$name} was removed.");
+    }
+
+    private function abortUnlessOwner(Request $request, UserApplication $userApplication): void
+    {
+        $user = $request->user();
+
+        abort_unless($userApplication->user_id === $user->id, 403);
+    }
+}
diff --git a/app/Http/Middleware/AuthenticateApiApplicationKey.php b/app/Http/Middleware/AuthenticateApiApplicationKey.php
new file mode 100644
index 0000000..8dc1405
--- /dev/null
+++ b/app/Http/Middleware/AuthenticateApiApplicationKey.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use App\Models\UserApplication;
+use Closure;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Auth;
+use Symfony\Component\HttpFoundation\Response;
+
+class AuthenticateApiApplicationKey
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  Closure(Request): (Response)  $next
+     */
+    public function handle(Request $request, Closure $next): Response
+    {
+        $plainTextKey = $request->bearerToken();
+
+        if ($plainTextKey === null || trim($plainTextKey) === '') {
+            return response()->json(['message' => 'Unauthenticated.'], 401);
+        }
+
+        $application = UserApplication::query()
+            ->with('user')
+            ->where('key_hash', UserApplication::hashKey($plainTextKey))
+            ->first();
+
+        if ($application === null || $application->user === null) {
+            return response()->json(['message' => 'Unauthenticated.'], 401);
+        }
+
+        Auth::setUser($application->user);
+        $request->setUserResolver(fn () => $application->user);
+
+        $application->forceFill([
+            'last_used_at' => now(),
+        ])->save();
+
+        return $next($request);
+    }
+}
diff --git a/app/Http/Requests/Settings/StoreUserApplicationRequest.php b/app/Http/Requests/Settings/StoreUserApplicationRequest.php
new file mode 100644
index 0000000..dc2b8d1
--- /dev/null
+++ b/app/Http/Requests/Settings/StoreUserApplicationRequest.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace App\Http\Requests\Settings;
+
+use Illuminate\Contracts\Validation\ValidationRule;
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Support\Str;
+
+class StoreUserApplicationRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     */
+    public function authorize(): bool
+    {
+        return $this->user() !== null;
+    }
+
+    protected function prepareForValidation(): void
+    {
+        $this->merge([
+            'name' => Str::of((string) $this->input('name'))->trim()->value(),
+        ]);
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array<string, ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [
+            'name' => ['required', 'string', 'max:255'],
+        ];
+    }
+}
diff --git a/app/Http/Resources/UserApplicationResource.php b/app/Http/Resources/UserApplicationResource.php
new file mode 100644
index 0000000..11b69e0
--- /dev/null
+++ b/app/Http/Resources/UserApplicationResource.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Http\Resources;
+
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+class UserApplicationResource extends JsonResource
+{
+    /**
+     * Transform the resource into an array.
+     *
+     * @return array<string, mixed>
+     */
+    public function toArray(Request $request): array
+    {
+        return [
+            'id' => $this->id,
+            'user_id' => $this->user_id,
+            'name' => $this->name,
+            'last_used_at' => $this->last_used_at?->toISOString(),
+            'created_at' => $this->created_at?->toISOString(),
+            'updated_at' => $this->updated_at?->toISOString(),
+        ];
+    }
+}
diff --git a/app/Models/User.php b/app/Models/User.php
index 22fdb24..b3dc0ba 100644
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -63,6 +63,13 @@ class User extends Authenticatable
             ->orderBy('base_url');
     }
 
+    public function userApplications(): HasMany
+    {
+        return $this->hasMany(UserApplication::class)
+            ->orderBy('name')
+            ->orderBy('id');
+    }
+
     public function assignedTickets(): HasMany
     {
         return $this->hasMany(Ticket::class, 'assignee_user_id');
diff --git a/app/Models/UserApplication.php b/app/Models/UserApplication.php
new file mode 100644
index 0000000..98ea81c
--- /dev/null
+++ b/app/Models/UserApplication.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Models;
+
+use Database\Factories\UserApplicationFactory;
+use Illuminate\Database\Eloquent\Attributes\Fillable;
+use Illuminate\Database\Eloquent\Attributes\Hidden;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Support\Str;
+
+#[Fillable(['key_hash', 'last_used_at', 'name', 'user_id'])]
+#[Hidden(['key_hash'])]
+class UserApplication extends Model
+{
+    /** @use HasFactory<UserApplicationFactory> */
+    use HasFactory;
+
+    public static function generatePlainTextKey(): string
+    {
+        return 'kg_app_'.Str::random(64);
+    }
+
+    public static function hashKey(string $plainTextKey): string
+    {
+        return hash_hmac('sha256', $plainTextKey, (string) config('app.key'));
+    }
+
+    /**
+     * @return array<string, string>
+     */
+    protected function casts(): array
+    {
+        return [
+            'last_used_at' => 'datetime',
+        ];
+    }
+
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+}
diff --git a/bootstrap/app.php b/bootstrap/app.php
index efb547c..001ee1c 100644
--- a/bootstrap/app.php
+++ b/bootstrap/app.php
@@ -1,5 +1,6 @@
 <?php
 
+use App\Http\Middleware\AuthenticateApiApplicationKey;
 use App\Http\Middleware\HandleAppearance;
 use App\Http\Middleware\HandleInertiaRequests;
 use Illuminate\Foundation\Application;
@@ -22,6 +23,10 @@ return Application::configure(basePath: dirname(__DIR__))
             HandleInertiaRequests::class,
             AddLinkHeadersForPreloadedAssets::class,
         ]);
+
+        $middleware->api(append: [
+            AuthenticateApiApplicationKey::class,
+        ]);
     })
     ->withExceptions(function (Exceptions $exceptions): void {
         //
diff --git a/database/factories/UserApplicationFactory.php b/database/factories/UserApplicationFactory.php
new file mode 100644
index 0000000..1c36d79
--- /dev/null
+++ b/database/factories/UserApplicationFactory.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace Database\Factories;
+
+use App\Models\User;
+use App\Models\UserApplication;
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+/**
+ * @extends Factory<UserApplication>
+ */
+class UserApplicationFactory extends Factory
+{
+    /**
+     * Define the model's default state.
+     *
+     * @return array<string, mixed>
+     */
+    public function definition(): array
+    {
+        $plainTextKey = UserApplication::generatePlainTextKey();
+
+        return [
+            'key_hash' => UserApplication::hashKey($plainTextKey),
+            'last_used_at' => null,
+            'name' => fake()->words(2, true),
+            'user_id' => User::factory(),
+        ];
+    }
+}
diff --git a/database/migrations/2026_04_20_174556_create_user_applications_table.php b/database/migrations/2026_04_20_174556_create_user_applications_table.php
new file mode 100644
index 0000000..e0809a4
--- /dev/null
+++ b/database/migrations/2026_04_20_174556_create_user_applications_table.php
@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('user_applications', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('user_id')->constrained()->cascadeOnDelete();
+            $table->string('name');
+            $table->string('key_hash', 64)->unique();
+            $table->timestamp('last_used_at')->nullable();
+            $table->timestamps();
+
+            $table->index(['user_id', 'name']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('user_applications');
+    }
+};
diff --git a/docs/openapi/kanbangit-api.openapi.json b/docs/openapi/kanbangit-api.openapi.json
index 1d6dca8..043b565 100644
--- a/docs/openapi/kanbangit-api.openapi.json
+++ b/docs/openapi/kanbangit-api.openapi.json
@@ -3,14 +3,18 @@
   "info": {
     "title": "KanbanGit Application API",
     "version": "0.1.0",
-    "description": "First-party JSON API for KanbanGit UI-equivalent workflows. Authentication is intentionally not described here because API verification will be added globally by the application later."
+    "description": "First-party JSON API for KanbanGit UI-equivalent workflows. Application endpoints require a bearer application key created in Settings > Applications."
   },
   "servers": [
     {
       "url": "/api"
     }
   ],
-  "security": [],
+  "security": [
+    {
+      "ApplicationKey": []
+    }
+  ],
   "tags": [
     {
       "name": "Projects"
@@ -29,6 +33,9 @@
     },
     {
       "name": "Git Connections"
+    },
+    {
+      "name": "Users"
     }
   ],
   "paths": {
@@ -1041,10 +1048,45 @@
           }
         }
       }
+    },
+    "/users/{user}/assigned-tickets": {
+      "get": {
+        "tags": ["Users"],
+        "operationId": "getUserAssignedTickets",
+        "parameters": [
+          {
+            "$ref": "#/components/parameters/UserId"
+          }
+        ],
+        "responses": {
+          "200": {
+            "$ref": "#/components/responses/AssignedTicketsPayload"
+          },
+          "401": {
+            "$ref": "#/components/responses/Unauthenticated"
+          }
+        }
+      }
     }
   },
   "components": {
+    "securitySchemes": {
+      "ApplicationKey": {
+        "type": "http",
+        "scheme": "bearer",
+        "bearerFormat": "KanbanGit application key",
+        "description": "Use a first-party application key created in Settings > Applications."
+      }
+    },
     "parameters": {
+      "UserId": {
+        "name": "user",
+        "in": "path",
+        "required": true,
+        "schema": {
+          "type": "integer"
+        }
+      },
       "ProjectId": {
         "name": "project",
         "in": "path",
@@ -1600,6 +1642,16 @@
           }
         }
       },
+      "AssignedTicketsPayload": {
+        "description": "Tickets assigned to a user grouped by projects visible to the authenticated application key owner. meta.assignee is null when no visible assigned tickets exist.",
+        "content": {
+          "application/json": {
+            "schema": {
+              "$ref": "#/components/schemas/AssignedTicketsPayloadEnvelope"
+            }
+          }
+        }
+      },
       "ValidationError": {
         "description": "Laravel validation error response.",
         "content": {
@@ -1779,6 +1831,49 @@
           }
         }
       },
+      "AssignedTicketsPayloadEnvelope": {
+        "type": "object",
+        "properties": {
+          "data": {
+            "type": "array",
+            "items": {
+              "$ref": "#/components/schemas/AssignedTicketsProjectGroup"
+            }
+          },
+          "meta": {
+            "type": "object",
+            "properties": {
+              "assignee": {
+                "anyOf": [
+                  {
+                    "$ref": "#/components/schemas/User"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ]
+              }
+            },
+            "required": ["assignee"]
+          }
+        },
+        "required": ["data", "meta"]
+      },
+      "AssignedTicketsProjectGroup": {
+        "type": "object",
+        "properties": {
+          "project": {
+            "$ref": "#/components/schemas/Project"
+          },
+          "tickets": {
+            "type": "array",
+            "items": {
+              "$ref": "#/components/schemas/Ticket"
+            }
+          }
+        },
+        "required": ["project", "tickets"]
+      },
       "BoardColumn": {
         "type": "object",
         "additionalProperties": true,
diff --git a/resources/js/layouts/settings/Layout.vue b/resources/js/layouts/settings/Layout.vue
index 40d4d88..879a8cb 100644
--- a/resources/js/layouts/settings/Layout.vue
+++ b/resources/js/layouts/settings/Layout.vue
@@ -6,6 +6,7 @@ import { Separator } from '@/components/ui/separator';
 import { useCurrentUrl } from '@/composables/useCurrentUrl';
 import { toUrl } from '@/lib/utils';
 import { edit as editAppearance } from '@/routes/appearance/index';
+import { edit as editApplications } from '@/routes/applications/index';
 import { edit as editGitConnections } from '@/routes/git-connections/index';
 import { edit as editProfile } from '@/routes/profile/index';
 import { edit as editSecurity } from '@/routes/security/index';
@@ -24,6 +25,10 @@ const sidebarNavItems: NavItem[] = [
         title: 'Git connections',
         href: editGitConnections(),
     },
+    {
+        title: 'Applications',
+        href: editApplications(),
+    },
     {
         title: 'Appearance',
         href: editAppearance(),
diff --git a/resources/js/pages/settings/Applications.vue b/resources/js/pages/settings/Applications.vue
new file mode 100644
index 0000000..acb8a08
--- /dev/null
+++ b/resources/js/pages/settings/Applications.vue
@@ -0,0 +1,198 @@
+<script setup lang="ts">
+import { Form, Head } from '@inertiajs/vue3';
+import UserApplicationController from '@/actions/App/Http/Controllers/Settings/UserApplicationController';
+import Heading from '@/components/Heading.vue';
+import InputError from '@/components/InputError.vue';
+import { Badge } from '@/components/ui/badge';
+import { Button } from '@/components/ui/button';
+import {
+    Card,
+    CardContent,
+    CardDescription,
+    CardHeader,
+    CardTitle,
+} from '@/components/ui/card';
+import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+import AppLayout from '@/layouts/AppLayout.vue';
+import SettingsLayout from '@/layouts/settings/Layout.vue';
+import { edit as editApplications } from '@/routes/applications/index';
+import type { BreadcrumbItem, SettingsApplicationsPageProps } from '@/types';
+
+defineProps<SettingsApplicationsPageProps>();
+
+const breadcrumbItems: BreadcrumbItem[] = [
+    {
+        title: 'Applications',
+        href: editApplications(),
+    },
+];
+
+const formatDate = (value: string | null): string => {
+    if (value === null) {
+        return 'Never';
+    }
+
+    return new Intl.DateTimeFormat(undefined, {
+        dateStyle: 'medium',
+        timeStyle: 'short',
+    }).format(new Date(value));
+};
+</script>
+
+<template>
+    <AppLayout :breadcrumbs="breadcrumbItems">
+        <Head title="Applications" />
+
+        <SettingsLayout>
+            <div class="flex flex-col gap-6">
+                <div class="space-y-2">
+                    <Heading
+                        variant="small"
+                        title="Applications"
+                        description="Create API keys for tools that should use KanbanGit with your account permissions."
+                    />
+                    <p class="text-muted-foreground text-sm">
+                        Keys are shown once. Delete an application when a tool
+                        should lose access.
+                    </p>
+                </div>
+
+                <div
+                    v-if="status"
+                    class="rounded-xl border border-emerald-200 bg-emerald-50 px-4 py-3 text-sm text-emerald-900 dark:border-emerald-900/70 dark:bg-emerald-950/40 dark:text-emerald-100"
+                >
+                    {{ status }}
+                </div>
+
+                <div
+                    v-if="applicationKey"
+                    class="rounded-xl border border-amber-200 bg-amber-50 px-4 py-3 text-sm text-amber-950 dark:border-amber-900/70 dark:bg-amber-950/30 dark:text-amber-100"
+                >
+                    <p class="font-medium">Save this API key now.</p>
+                    <p class="mt-1">
+                        It will not be shown again after you leave this page.
+                    </p>
+                    <Input
+                        class="mt-3 font-mono text-xs"
+                        :model-value="applicationKey"
+                        readonly
+                    />
+                </div>
+
+                <div class="grid gap-6 xl:grid-cols-[24rem_minmax(0,1fr)]">
+                    <Card>
+                        <CardHeader>
+                            <CardTitle>Create application</CardTitle>
+                            <CardDescription>
+                                Name the tool that will receive an API key.
+                            </CardDescription>
+                        </CardHeader>
+
+                        <CardContent>
+                            <Form
+                                v-bind="UserApplicationController.store.form()"
+                                class="space-y-4"
+                                v-slot="{ errors, processing }"
+                            >
+                                <div class="grid gap-2">
+                                    <Label for="name">Application name</Label>
+                                    <Input
+                                        id="name"
+                                        name="name"
+                                        type="text"
+                                        required
+                                        autofocus
+                                        placeholder="Claude Desktop"
+                                    />
+                                    <InputError :message="errors.name" />
+                                </div>
+
+                                <Button type="submit" :disabled="processing">
+                                    Create application
+                                </Button>
+                            </Form>
+                        </CardContent>
+                    </Card>
+
+                    <Card class="gap-0 overflow-hidden">
+                        <CardHeader class="border-b">
+                            <CardTitle>Saved applications</CardTitle>
+                            <CardDescription>
+                                Existing keys stay hidden. Create a new
+                                application when another key is needed.
+                            </CardDescription>
+                        </CardHeader>
+
+                        <CardContent class="space-y-4 p-6">
+                            <div
+                                v-if="applications.length === 0"
+                                class="border-border text-muted-foreground rounded-xl border border-dashed px-4 py-6 text-sm"
+                            >
+                                No applications have been created yet.
+                            </div>
+
+                            <div
+                                v-for="application in applications"
+                                :key="application.id"
+                                class="border-border rounded-xl border p-4"
+                            >
+                                <div
+                                    class="flex flex-wrap items-start justify-between gap-4"
+                                >
+                                    <div class="space-y-2">
+                                        <div
+                                            class="flex flex-wrap items-center gap-2"
+                                        >
+                                            <Badge>API key</Badge>
+                                            <span class="text-sm font-medium">
+                                                {{ application.name }}
+                                            </span>
+                                        </div>
+                                        <p
+                                            class="text-muted-foreground text-xs"
+                                        >
+                                            Created:
+                                            {{
+                                                formatDate(
+                                                    application.created_at,
+                                                )
+                                            }}
+                                        </p>
+                                        <p
+                                            class="text-muted-foreground text-xs"
+                                        >
+                                            Last used:
+                                            {{
+                                                formatDate(
+                                                    application.last_used_at,
+                                                )
+                                            }}
+                                        </p>
+                                    </div>
+
+                                    <Form
+                                        v-bind="
+                                            UserApplicationController.destroy.form(
+                                                application.id,
+                                            )
+                                        "
+                                        v-slot="{ processing }"
+                                    >
+                                        <Button
+                                            type="submit"
+                                            variant="destructive"
+                                            :disabled="processing"
+                                        >
+                                            Delete
+                                        </Button>
+                                    </Form>
+                                </div>
+                            </div>
+                        </CardContent>
+                    </Card>
+                </div>
+            </div>
+        </SettingsLayout>
+    </AppLayout>
+</template>
diff --git a/resources/js/types/models/user-application-model.ts b/resources/js/types/models/user-application-model.ts
new file mode 100644
index 0000000..b4d8a96
--- /dev/null
+++ b/resources/js/types/models/user-application-model.ts
@@ -0,0 +1,8 @@
+export type UserApplicationModel = {
+    id: number;
+    user_id: number;
+    name: string;
+    last_used_at: string | null;
+    created_at: string | null;
+    updated_at: string | null;
+};
diff --git a/resources/js/types/page-props.ts b/resources/js/types/page-props.ts
index e52c4eb..5a102ac 100644
--- a/resources/js/types/page-props.ts
+++ b/resources/js/types/page-props.ts
@@ -14,6 +14,7 @@ import type { TicketPriorityModel } from '@/types/models/ticket-priority-model';
 import type { TicketStatusModel } from '@/types/models/ticket-status-model';
 import type { TicketTreeNodeModel } from '@/types/models/ticket-tree-node-model';
 import type { TicketTypeModel } from '@/types/models/ticket-type-model';
+import type { UserApplicationModel } from '@/types/models/user-application-model';
 import type { UserGitConnectionModel } from '@/types/models/user-git-connection-model';
 import type { UserModel } from '@/types/models/user-model';
 
@@ -150,3 +151,9 @@ export type SettingsGitConnectionsPageProps = {
     gitConnections: UserGitConnectionModel[];
     status?: string | null;
 };
+
+export type SettingsApplicationsPageProps = {
+    applicationKey?: string | null;
+    applications: UserApplicationModel[];
+    status?: string | null;
+};
diff --git a/routes/api.php b/routes/api.php
index 630ab56..7a864a6 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -3,3 +3,5 @@
 require __DIR__.'/api/projects.php';
 
 require __DIR__.'/api/settings.php';
+
+require __DIR__.'/api/users.php';
diff --git a/routes/api/users.php b/routes/api/users.php
new file mode 100644
index 0000000..52f8708
--- /dev/null
+++ b/routes/api/users.php
@@ -0,0 +1,11 @@
+<?php
+
+use App\Http\Controllers\Api\UserAssignedTicketController;
+use Illuminate\Support\Facades\Route;
+
+Route::prefix('users')
+    ->name('api.users.')
+    ->group(function (): void {
+        Route::get('{user}/assigned-tickets', UserAssignedTicketController::class)
+            ->name('assigned-tickets');
+    });
diff --git a/routes/web/settings.php b/routes/web/settings.php
index c03052c..21827fc 100644
--- a/routes/web/settings.php
+++ b/routes/web/settings.php
@@ -3,6 +3,7 @@
 use App\Http\Controllers\Settings\GitConnectionController;
 use App\Http\Controllers\Settings\ProfileController;
 use App\Http\Controllers\Settings\SecurityController;
+use App\Http\Controllers\Settings\UserApplicationController;
 use Illuminate\Support\Facades\Route;
 
 Route::middleware('auth')
@@ -41,5 +42,14 @@ Route::middleware(['auth', 'verified'])
                 Route::delete('{gitConnection}', 'destroy')->name('destroy');
             });
 
+        Route::prefix('applications')
+            ->name('applications.')
+            ->controller(UserApplicationController::class)
+            ->group(function (): void {
+                Route::get('/', 'edit')->name('edit');
+                Route::post('/', 'store')->name('store');
+                Route::delete('{userApplication}', 'destroy')->name('destroy');
+            });
+
         Route::inertia('appearance', 'settings/Appearance')->name('appearance.edit');
     });
diff --git a/tests/Feature/Api/ApiApplicationKeyTest.php b/tests/Feature/Api/ApiApplicationKeyTest.php
new file mode 100644
index 0000000..cd85681
--- /dev/null
+++ b/tests/Feature/Api/ApiApplicationKeyTest.php
@@ -0,0 +1,84 @@
+<?php
+
+namespace Tests\Feature\Api;
+
+use App\Models\Project;
+use App\Models\User;
+use App\Models\UserApplication;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class ApiApplicationKeyTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_missing_bearer_token_returns_unauthorized(): void
+    {
+        $this->getJson(route('api.projects.index'))
+            ->assertUnauthorized()
+            ->assertJsonPath('message', 'Unauthenticated.');
+    }
+
+    public function test_invalid_bearer_token_returns_unauthorized(): void
+    {
+        $this->withHeader('Authorization', 'Bearer wrong-key')
+            ->getJson(route('api.projects.index'))
+            ->assertUnauthorized()
+            ->assertJsonPath('message', 'Unauthenticated.');
+    }
+
+    public function test_valid_bearer_token_authenticates_as_owner(): void
+    {
+        $user = User::factory()->create();
+        $project = Project::factory()->create([
+            'name' => 'Visible project',
+        ]);
+
+        $this->syncProjectPermissions($project, $user, ['view']);
+
+        $this->withApplicationKey($user)
+            ->getJson(route('api.projects.index'))
+            ->assertOk()
+            ->assertJsonPath('data.0.name', 'Visible project')
+            ->assertJsonCount(1, 'data');
+    }
+
+    public function test_application_key_owner_permissions_still_apply(): void
+    {
+        $user = User::factory()->create();
+        $visibleProject = Project::factory()->create([
+            'name' => 'Visible project',
+        ]);
+        Project::factory()->create([
+            'name' => 'Hidden project',
+        ]);
+
+        $this->syncProjectPermissions($visibleProject, $user, ['view']);
+
+        $this->withApplicationKey($user)
+            ->getJson(route('api.projects.index'))
+            ->assertOk()
+            ->assertJsonPath('data.0.name', 'Visible project')
+            ->assertJsonCount(1, 'data');
+    }
+
+    public function test_application_last_used_at_updates_after_use(): void
+    {
+        $user = User::factory()->create();
+        $project = Project::factory()->create();
+        $plainTextKey = UserApplication::generatePlainTextKey();
+        $application = UserApplication::query()->create([
+            'key_hash' => UserApplication::hashKey($plainTextKey),
+            'name' => 'Claude Desktop',
+            'user_id' => $user->id,
+        ]);
+
+        $this->syncProjectPermissions($project, $user, ['view']);
+
+        $this->withHeader('Authorization', "Bearer {$plainTextKey}")
+            ->getJson(route('api.projects.index'))
+            ->assertOk();
+
+        $this->assertNotNull($application->fresh()->last_used_at);
+    }
+}
diff --git a/tests/Feature/Api/AssignedTicketsApiTest.php b/tests/Feature/Api/AssignedTicketsApiTest.php
new file mode 100644
index 0000000..0b7647f
--- /dev/null
+++ b/tests/Feature/Api/AssignedTicketsApiTest.php
@@ -0,0 +1,113 @@
+<?php
+
+namespace Tests\Feature\Api;
+
+use App\Models\Project;
+use App\Models\Ticket;
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AssignedTicketsApiTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_assigned_tickets_are_grouped_by_visible_project(): void
+    {
+        $viewer = User::factory()->create();
+        $assignee = User::factory()->create([
+            'name' => 'Assigned User',
+        ]);
+        $otherAssignee = User::factory()->create();
+
+        $olderProject = Project::factory()->create([
+            'key' => 'OLD',
+            'name' => 'Older project',
+        ]);
+        $newerProject = Project::factory()->create([
+            'key' => 'NEW',
+            'name' => 'Newer project',
+        ]);
+        $hiddenProject = Project::factory()->create([
+            'key' => 'HID',
+            'name' => 'Hidden project',
+        ]);
+
+        $this->syncProjectPermissions($olderProject, $viewer, ['view']);
+        $this->syncProjectPermissions($newerProject, $viewer, ['view']);
+
+        Ticket::factory()->create([
+            'assignee_user_id' => $assignee->id,
+            'project_id' => $olderProject->id,
+            'sequence_number' => 1,
+            'ticket_key' => 'OLD-1',
+            'title' => 'Older visible ticket',
+        ]);
+        Ticket::factory()->create([
+            'assignee_user_id' => $assignee->id,
+            'project_id' => $newerProject->id,
+            'sequence_number' => 2,
+            'ticket_key' => 'NEW-2',
+            'title' => 'Newer visible ticket',
+        ]);
+        Ticket::factory()->create([
+            'assignee_user_id' => $assignee->id,
+            'project_id' => $hiddenProject->id,
+            'sequence_number' => 1,
+            'ticket_key' => 'HID-1',
+            'title' => 'Hidden ticket',
+        ]);
+        Ticket::factory()->create([
+            'assignee_user_id' => $otherAssignee->id,
+            'project_id' => $olderProject->id,
+            'sequence_number' => 3,
+            'ticket_key' => 'OLD-3',
+            'title' => 'Other user ticket',
+        ]);
+
+        $this->withApplicationKey($viewer)
+            ->getJson(route('api.users.assigned-tickets', $assignee))
+            ->assertOk()
+            ->assertJsonPath('meta.assignee.name', 'Assigned User')
+            ->assertJsonPath('data.0.project.name', 'Newer project')
+            ->assertJsonPath('data.0.tickets.0.ticket_key', 'NEW-2')
+            ->assertJsonCount(1, 'data.0.tickets')
+            ->assertJsonPath('data.1.project.name', 'Older project')
+            ->assertJsonPath('data.1.tickets.0.ticket_key', 'OLD-1')
+            ->assertJsonCount(1, 'data.1.tickets')
+            ->assertJsonCount(2, 'data');
+    }
+
+    public function test_assignee_metadata_is_hidden_when_no_visible_assigned_tickets_exist(): void
+    {
+        $viewer = User::factory()->create();
+        $assignee = User::factory()->create([
+            'name' => 'Hidden User',
+        ]);
+
+        $visibleProject = Project::factory()->create([
+            'key' => 'VIS',
+            'name' => 'Visible project',
+        ]);
+        $hiddenProject = Project::factory()->create([
+            'key' => 'HID',
+            'name' => 'Hidden project',
+        ]);
+
+        $this->syncProjectPermissions($visibleProject, $viewer, ['view']);
+
+        Ticket::factory()->create([
+            'assignee_user_id' => $assignee->id,
+            'project_id' => $hiddenProject->id,
+            'sequence_number' => 1,
+            'ticket_key' => 'HID-1',
+            'title' => 'Hidden ticket',
+        ]);
+
+        $this->withApplicationKey($viewer)
+            ->getJson(route('api.users.assigned-tickets', $assignee))
+            ->assertOk()
+            ->assertJsonPath('data', [])
+            ->assertJsonPath('meta.assignee', null);
+    }
+}
diff --git a/tests/Feature/Api/OpenApiDocumentationTest.php b/tests/Feature/Api/OpenApiDocumentationTest.php
index e6bd11c..24418f2 100644
--- a/tests/Feature/Api/OpenApiDocumentationTest.php
+++ b/tests/Feature/Api/OpenApiDocumentationTest.php
@@ -17,7 +17,7 @@ class OpenApiDocumentationTest extends TestCase
         $this->assertIsArray($document);
         $this->assertSame(JSON_ERROR_NONE, json_last_error());
         $this->assertSame('3.1.0', $document['openapi']);
-        $this->assertSame([], $document['security']);
+        $this->assertSame([['ApplicationKey' => []]], $document['security']);
 
         $expectedOperations = [
             ['get', '/projects'],
@@ -67,6 +67,7 @@ class OpenApiDocumentationTest extends TestCase
             ['post', '/git-connections'],
             ['patch', '/git-connections/{gitConnection}'],
             ['delete', '/git-connections/{gitConnection}'],
+            ['get', '/users/{user}/assigned-tickets'],
         ];
 
         foreach ($expectedOperations as [$method, $path]) {
@@ -74,8 +75,21 @@ class OpenApiDocumentationTest extends TestCase
             $this->assertArrayHasKey($method, $document['paths'][$path]);
         }
 
+        $this->assertArrayHasKey('ApplicationKey', $document['components']['securitySchemes']);
+        $this->assertSame('http', $document['components']['securitySchemes']['ApplicationKey']['type']);
+        $this->assertSame('bearer', $document['components']['securitySchemes']['ApplicationKey']['scheme']);
         $this->assertArrayHasKey('ValidationError', $document['components']['schemas']);
         $this->assertArrayHasKey('TicketUpdateRequest', $document['components']['schemas']);
         $this->assertArrayHasKey('UserGitConnectionRequest', $document['components']['schemas']);
+        $this->assertArrayHasKey('AssignedTicketsPayloadEnvelope', $document['components']['schemas']);
+        $this->assertArrayHasKey('AssignedTicketsProjectGroup', $document['components']['schemas']);
+
+        $assigneeSchema = $document['components']['schemas']['AssignedTicketsPayloadEnvelope']['properties']['meta']['properties']['assignee'] ?? null;
+
+        $this->assertIsArray($assigneeSchema);
+        $this->assertSame([
+            ['$ref' => '#/components/schemas/User'],
+            ['type' => 'null'],
+        ], $assigneeSchema['anyOf'] ?? null);
     }
 }
diff --git a/tests/Feature/Api/ProjectApiTest.php b/tests/Feature/Api/ProjectApiTest.php
index 9e263e2..c4bbf93 100644
--- a/tests/Feature/Api/ProjectApiTest.php
+++ b/tests/Feature/Api/ProjectApiTest.php
@@ -24,7 +24,7 @@ class ProjectApiTest extends TestCase
 
         $this->syncProjectPermissions($visibleProject, $user, ['view']);
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->getJson(route('api.projects.index'))
             ->assertOk()
             ->assertJsonPath('data.0.name', 'Visible project')
@@ -36,7 +36,7 @@ class ProjectApiTest extends TestCase
         $user = User::factory()->create();
         $this->syncGlobalPermissions($user, ['create']);
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->postJson(route('api.projects.store'), [
                 'key' => 'api',
                 'name' => 'API Project',
@@ -61,20 +61,20 @@ class ProjectApiTest extends TestCase
 
         app(InitializeProjectTicketMetadata::class)->handle($project);
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->getJson(route('api.projects.show', $project))
             ->assertForbidden();
 
         $this->syncProjectPermissions($project, $user, ['view']);
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->getJson(route('api.projects.show', $project))
             ->assertOk()
             ->assertJsonPath('data.key', 'CORE');
 
         $this->syncGlobalPermissions($admin, ['admin']);
 
-        $this->actingAs($admin)
+        $this->withApplicationKey($admin)
             ->deleteJson(route('api.projects.destroy', $project), [
                 'confirmation_key' => 'CORE',
             ])
diff --git a/tests/Feature/Api/PublicApiDocumentationTest.php b/tests/Feature/Api/PublicApiDocumentationTest.php
index 74c8180..0730d73 100644
--- a/tests/Feature/Api/PublicApiDocumentationTest.php
+++ b/tests/Feature/Api/PublicApiDocumentationTest.php
@@ -30,7 +30,7 @@ class PublicApiDocumentationTest extends TestCase
         $document = json_decode((string) $response->getContent(), true, 512, JSON_THROW_ON_ERROR);
 
         $this->assertSame('3.1.0', $document['openapi']);
-        $this->assertSame([], $document['security']);
+        $this->assertSame([['ApplicationKey' => []]], $document['security']);
         $this->assertArrayHasKey('/projects', $document['paths']);
     }
 
diff --git a/tests/Feature/Api/SettingsApiTest.php b/tests/Feature/Api/SettingsApiTest.php
index 5f88734..8c30924 100644
--- a/tests/Feature/Api/SettingsApiTest.php
+++ b/tests/Feature/Api/SettingsApiTest.php
@@ -18,12 +18,12 @@ class SettingsApiTest extends TestCase
     {
         [$user, $project] = $this->projectContext();
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->getJson(route('api.projects.settings.board', $project))
             ->assertOk()
             ->assertJsonPath('data.backlogTicketStatuses.0.name', 'Backlog');
 
-        $columnId = $this->actingAs($user)
+        $columnId = $this->withApplicationKey($user)
             ->postJson(route('api.projects.settings.board.columns.store', $project), [
                 'name' => 'In Review',
             ])
@@ -31,7 +31,7 @@ class SettingsApiTest extends TestCase
             ->assertJsonPath('data.name', 'In Review')
             ->json('data.id');
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->patchJson(route('api.projects.settings.board.columns.update', [$project, $columnId]), [
                 'name' => 'Review',
                 'position' => 1,
@@ -39,7 +39,7 @@ class SettingsApiTest extends TestCase
             ->assertOk()
             ->assertJsonPath('data.name', 'Review');
 
-        $statusId = $this->actingAs($user)
+        $statusId = $this->withApplicationKey($user)
             ->postJson(route('api.projects.settings.board.statuses.store', $project), [
                 'board_column_id' => $columnId,
                 'name' => 'Ready',
@@ -47,7 +47,7 @@ class SettingsApiTest extends TestCase
             ->assertCreated()
             ->assertJsonPath('data.name', 'Ready')
             ->json('data.id');
-        $replacementStatusId = $this->actingAs($user)
+        $replacementStatusId = $this->withApplicationKey($user)
             ->postJson(route('api.projects.settings.board.statuses.store', $project), [
                 'board_column_id' => $columnId,
                 'name' => 'QA',
@@ -57,14 +57,14 @@ class SettingsApiTest extends TestCase
 
         $backlogStatus = $project->ticketStatuses()->whereNull('board_column_id')->firstOrFail();
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->patchJson(route('api.projects.settings.board.statuses.transitions.update', [$project, $backlogStatus]), [
                 'allowed_ticket_status_ids' => [$statusId],
             ])
             ->assertOk()
             ->assertJsonPath('data.allowed_target_statuses.0.id', $statusId);
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->deleteJson(route('api.projects.settings.board.statuses.destroy', [$project, $statusId]))
             ->assertNoContent();
 
@@ -72,7 +72,7 @@ class SettingsApiTest extends TestCase
             'id' => $replacementStatusId,
         ]);
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->deleteJson(route('api.projects.settings.board.columns.destroy', [$project, $columnId]))
             ->assertNoContent();
     }
@@ -81,12 +81,12 @@ class SettingsApiTest extends TestCase
     {
         [$user, $project] = $this->projectContext();
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->getJson(route('api.projects.settings.metadata', $project))
             ->assertOk()
             ->assertJsonPath('data.ticketTypes.0.name', 'Task');
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->patchJson(route('api.projects.settings.metadata.update', $project), [
                 'show_author' => false,
                 'show_story_points' => false,
@@ -94,7 +94,7 @@ class SettingsApiTest extends TestCase
             ->assertOk()
             ->assertJsonPath('data.show_author', false);
 
-        $typeId = $this->actingAs($user)
+        $typeId = $this->withApplicationKey($user)
             ->postJson(route('api.projects.settings.metadata.types.store', $project), [
                 'is_parent' => true,
                 'name' => 'Epic',
@@ -103,7 +103,7 @@ class SettingsApiTest extends TestCase
             ->assertJsonPath('data.name', 'Epic')
             ->json('data.id');
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->patchJson(route('api.projects.settings.metadata.types.update', [$project, $typeId]), [
                 'name' => 'Initiative',
                 'position' => 1,
@@ -111,14 +111,14 @@ class SettingsApiTest extends TestCase
             ->assertOk()
             ->assertJsonPath('data.name', 'Initiative');
 
-        $priorityId = $this->actingAs($user)
+        $priorityId = $this->withApplicationKey($user)
             ->postJson(route('api.projects.settings.metadata.priorities.store', $project), [
                 'name' => 'Urgent',
             ])
             ->assertCreated()
             ->json('data.id');
 
-        $fieldId = $this->actingAs($user)
+        $fieldId = $this->withApplicationKey($user)
             ->postJson(route('api.projects.settings.metadata.fields.store', $project), [
                 'field_type' => 'number',
                 'label' => 'Risk',
@@ -126,26 +126,26 @@ class SettingsApiTest extends TestCase
             ->assertCreated()
             ->json('data.id');
 
-        $linkTypeId = $this->actingAs($user)
+        $linkTypeId = $this->withApplicationKey($user)
             ->postJson(route('api.projects.settings.metadata.link-types.store', $project), [
                 'name' => 'Relates to',
             ])
             ->assertCreated()
             ->json('data.id');
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->deleteJson(route('api.projects.settings.metadata.fields.destroy', [$project, $fieldId]))
             ->assertNoContent();
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->deleteJson(route('api.projects.settings.metadata.link-types.destroy', [$project, $linkTypeId]))
             ->assertNoContent();
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->deleteJson(route('api.projects.settings.metadata.priorities.destroy', [$project, $priorityId]))
             ->assertNoContent();
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->deleteJson(route('api.projects.settings.metadata.types.destroy', [$project, $typeId]))
             ->assertNoContent();
     }
@@ -214,7 +214,7 @@ class SettingsApiTest extends TestCase
 
         [$user, $project] = $this->projectContext();
 
-        $gitConnectionId = $this->actingAs($user)
+        $gitConnectionId = $this->withApplicationKey($user)
             ->postJson(route('api.git-connections.store'), [
                 'api_token' => 'secret-token',
                 'base_url' => 'https://git.example.test/api/v1',
@@ -224,12 +224,12 @@ class SettingsApiTest extends TestCase
             ->assertJsonPath('data.account_login', 'api-user')
             ->json('data.id');
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->getJson(route('api.git-connections.index'))
             ->assertOk()
             ->assertJsonPath('data.0.id', $gitConnectionId);
 
-        $repositoryConnectionId = $this->actingAs($user)
+        $repositoryConnectionId = $this->withApplicationKey($user)
             ->postJson(route('api.projects.settings.repositories.store', $project), [
                 'provider_repository_id' => '501',
                 'user_git_connection_id' => $gitConnectionId,
@@ -238,17 +238,17 @@ class SettingsApiTest extends TestCase
             ->assertJsonPath('data.repository_full_name', 'core-team/kanbangit')
             ->json('data.id');
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->getJson(route('api.projects.settings.repositories', $project))
             ->assertOk()
             ->assertJsonPath('data.repositoryConnections.0.id', $repositoryConnectionId)
             ->assertJsonPath('data.availableRepositorySources.0.repositories.0.full_name', 'core-team/kanbangit');
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->deleteJson(route('api.projects.settings.repositories.destroy', [$project, $repositoryConnectionId]))
             ->assertNoContent();
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->deleteJson(route('api.git-connections.destroy', $gitConnectionId))
             ->assertNoContent();
     }
diff --git a/tests/Feature/Api/TicketApiTest.php b/tests/Feature/Api/TicketApiTest.php
index e02880a..2847775 100644
--- a/tests/Feature/Api/TicketApiTest.php
+++ b/tests/Feature/Api/TicketApiTest.php
@@ -28,7 +28,7 @@ class TicketApiTest extends TestCase
         $status = $project->ticketStatuses()->firstOrFail();
         $type = $project->ticketTypes()->where('is_parent', false)->firstOrFail();
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->getJson(route('api.projects.ticket-options', [
                 'project' => $project,
                 'source' => 'backlog',
@@ -37,7 +37,7 @@ class TicketApiTest extends TestCase
             ->assertJsonPath('data.defaultTicketStatusId', $status->id)
             ->assertJsonPath('data.ticketTypes.0.id', $type->id);
 
-        $createResponse = $this->actingAs($user)
+        $createResponse = $this->withApplicationKey($user)
             ->postJson(route('api.projects.tickets.store', $project), [
                 'acceptance_criteria' => 'Can sign in',
                 'description' => 'Build the API-created ticket',
@@ -53,12 +53,12 @@ class TicketApiTest extends TestCase
 
         $ticket = Ticket::query()->findOrFail($createResponse->json('data.id'));
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->getJson(route('api.projects.tickets.index', $project))
             ->assertOk()
             ->assertJsonPath('data.0.ticket_key', 'CORE-1');
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->patchJson(route('api.projects.tickets.update', [$project, $ticket]), [
                 'acceptance_criteria' => 'Can sign in from the API',
                 'blocked_comment' => null,
@@ -74,7 +74,7 @@ class TicketApiTest extends TestCase
             ->assertJsonPath('data.title', 'Updated API ticket')
             ->assertJsonPath('meta.message', 'CORE-1 was updated.');
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->getJson(route('api.projects.tickets.show', [$project, $ticket]))
             ->assertOk()
             ->assertJsonPath('data.ticket.ticket_key', 'CORE-1')
@@ -172,13 +172,13 @@ class TicketApiTest extends TestCase
 
         $ticket = $this->ticket($project, $backlogStatus);
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->getJson(route('api.projects.tickets.status-targets', [$project, $ticket]))
             ->assertOk()
             ->assertJsonPath('data.current_status.id', $backlogStatus->id)
             ->assertJsonPath('data.target_statuses.0.id', $doingStatus->id);
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->patchJson(route('api.projects.tickets.status.update', [$project, $ticket]), [
                 'ticket_status_id' => $doingStatus->id,
             ])
@@ -228,7 +228,7 @@ class TicketApiTest extends TestCase
             'position' => 1,
         ]);
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->postJson(route('api.projects.tickets.links.store', [$project, $ticket]), [
                 'linked_ticket_id' => $linkedTicket->id,
                 'ticket_link_type_id' => $linkType->id,
@@ -252,7 +252,7 @@ class TicketApiTest extends TestCase
             'provider' => GitProviderKey::Gitea,
         ]);
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->getJson(route('api.projects.tickets.branches.validate', [
                 'project' => $project,
                 'ticket' => $ticket,
@@ -262,7 +262,7 @@ class TicketApiTest extends TestCase
             ->assertOk()
             ->assertJsonPath('data.is_valid', true);
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->postJson(route('api.projects.tickets.branches.store', [$project, $ticket]), [
                 'branch_name' => 'core-1-api-ticket',
                 'repository_connection_id' => $repositoryConnection->id,
@@ -290,12 +290,12 @@ class TicketApiTest extends TestCase
                 'position' => 1,
             ]);
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->getJson(route('api.projects.backlog', $project))
             ->assertOk()
             ->assertJsonPath('data.tickets.0.id', $ticket->id);
 
-        $this->actingAs($user)
+        $this->withApplicationKey($user)
             ->getJson(route('api.projects.board', $project))
             ->assertOk()
             ->assertJsonPath('data.boardColumns.0.name', 'Todo');
diff --git a/tests/Feature/Models/UserApplicationTest.php b/tests/Feature/Models/UserApplicationTest.php
new file mode 100644
index 0000000..248256e
--- /dev/null
+++ b/tests/Feature/Models/UserApplicationTest.php
@@ -0,0 +1,40 @@
+<?php
+
+namespace Tests\Feature\Models;
+
+use App\Models\User;
+use App\Models\UserApplication;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class UserApplicationTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_application_keys_are_hashed_and_hidden(): void
+    {
+        $plainTextKey = UserApplication::generatePlainTextKey();
+        $keyHash = UserApplication::hashKey($plainTextKey);
+
+        $this->assertStringStartsWith('kg_app_', $plainTextKey);
+        $this->assertNotSame($plainTextKey, $keyHash);
+        $this->assertSame(64, strlen($keyHash));
+        $this->assertSame($keyHash, UserApplication::hashKey($plainTextKey));
+
+        $application = UserApplication::query()->create([
+            'key_hash' => $keyHash,
+            'name' => 'Claude Desktop',
+            'user_id' => User::factory()->create()->id,
+        ]);
+
+        $this->assertArrayNotHasKey('key_hash', $application->toArray());
+        $this->assertDatabaseHas('user_applications', [
+            'id' => $application->id,
+            'key_hash' => $keyHash,
+        ]);
+        $this->assertDatabaseMissing('user_applications', [
+            'id' => $application->id,
+            'key_hash' => $plainTextKey,
+        ]);
+    }
+}
diff --git a/tests/Feature/Settings/UserApplicationTest.php b/tests/Feature/Settings/UserApplicationTest.php
new file mode 100644
index 0000000..d80c6b3
--- /dev/null
+++ b/tests/Feature/Settings/UserApplicationTest.php
@@ -0,0 +1,103 @@
+<?php
+
+namespace Tests\Feature\Settings;
+
+use App\Models\User;
+use App\Models\UserApplication;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Inertia\Testing\AssertableInertia as Assert;
+use Tests\TestCase;
+
+class UserApplicationTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_applications_page_is_displayed(): void
+    {
+        $user = User::factory()->create();
+        UserApplication::factory()->for($user)->create([
+            'name' => 'Claude Desktop',
+        ]);
+
+        $this->actingAs($user)
+            ->get(route('applications.edit'))
+            ->assertOk()
+            ->assertInertia(fn (Assert $page) => $page
+                ->component('settings/Applications')
+                ->where('applications.0.name', 'Claude Desktop')
+                ->where('applicationKey', null),
+            );
+    }
+
+    public function test_users_can_create_applications_and_see_plaintext_key_once(): void
+    {
+        $user = User::factory()->create();
+
+        $response = $this->actingAs($user)
+            ->post(route('applications.store'), [
+                'name' => 'Claude Desktop',
+            ])
+            ->assertRedirect(route('applications.edit'))
+            ->assertSessionHas('applicationKey')
+            ->assertSessionHas('status', 'Claude Desktop was created. Save this key now; it will not be shown again.');
+
+        $plainTextKey = (string) $response->baseResponse->getSession()->get('applicationKey');
+
+        $this->assertStringStartsWith('kg_app_', $plainTextKey);
+        $this->assertDatabaseHas('user_applications', [
+            'name' => 'Claude Desktop',
+            'user_id' => $user->id,
+            'key_hash' => UserApplication::hashKey($plainTextKey),
+        ]);
+        $this->assertDatabaseMissing('user_applications', [
+            'name' => 'Claude Desktop',
+            'key_hash' => $plainTextKey,
+        ]);
+
+        $this->actingAs($user)
+            ->get(route('applications.edit'))
+            ->assertOk()
+            ->assertInertia(fn (Assert $page) => $page
+                ->where('applicationKey', $plainTextKey),
+            );
+
+        $this->actingAs($user)
+            ->get(route('applications.edit'))
+            ->assertOk()
+            ->assertInertia(fn (Assert $page) => $page
+                ->where('applicationKey', null),
+            );
+    }
+
+    public function test_users_can_delete_their_own_applications(): void
+    {
+        $user = User::factory()->create();
+        $application = UserApplication::factory()->for($user)->create([
+            'name' => 'Claude Desktop',
+        ]);
+
+        $this->actingAs($user)
+            ->delete(route('applications.destroy', $application))
+            ->assertRedirect(route('applications.edit'))
+            ->assertSessionHas('status', 'Claude Desktop was removed.');
+
+        $this->assertDatabaseMissing('user_applications', [
+            'id' => $application->id,
+        ]);
+    }
+
+    public function test_users_cannot_delete_foreign_applications(): void
+    {
+        $owner = User::factory()->create();
+        $otherUser = User::factory()->create();
+        $application = UserApplication::factory()->for($owner)->create();
+
+        $this->actingAs($otherUser)
+            ->delete(route('applications.destroy', $application))
+            ->assertForbidden();
+
+        $this->assertDatabaseHas('user_applications', [
+            'id' => $application->id,
+        ]);
+    }
+}
diff --git a/tests/TestCase.php b/tests/TestCase.php
index 8a7bbf6..702aa58 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -7,6 +7,7 @@ use App\Enums\Permission;
 use App\Models\Project;
 use App\Models\Team;
 use App\Models\User;
+use App\Models\UserApplication;
 use Illuminate\Foundation\Testing\TestCase as BaseTestCase;
 use Laravel\Fortify\Features;
 
@@ -55,6 +56,26 @@ abstract class TestCase extends BaseTestCase
         );
     }
 
+    protected function withApplicationKey(User $user, ?string $name = null): static
+    {
+        $plainTextKey = $this->createPlainTextApplicationKey($user, $name);
+
+        return $this->withHeader('Authorization', "Bearer {$plainTextKey}");
+    }
+
+    protected function createPlainTextApplicationKey(User $user, ?string $name = null): string
+    {
+        $plainTextKey = UserApplication::generatePlainTextKey();
+
+        UserApplication::query()->create([
+            'key_hash' => UserApplication::hashKey($plainTextKey),
+            'name' => $name ?? 'Test application',
+            'user_id' => $user->id,
+        ]);
+
+        return $plainTextKey;
+    }
+
     /**
      * @param  array<int, Permission|string>  $permissions
      * @return array<int, string>