diff --git a/app/Actions/Git/Contracts/GitProviderClient.php b/app/Actions/Git/Contracts/GitProviderClient.php
index 297ff8e..947c510 100644
--- a/app/Actions/Git/Contracts/GitProviderClient.php
+++ b/app/Actions/Git/Contracts/GitProviderClient.php
@@ -3,6 +3,7 @@
 namespace App\Actions\Git\Contracts;
 
 use App\Actions\Git\Data\GitAuthenticatedUser;
+use App\Actions\Git\Data\GitBranch;
 use App\Actions\Git\Data\GitRepository;
 use App\Actions\Git\GitProviderKey;
 
@@ -16,4 +17,14 @@ interface GitProviderClient
      * @return array<int, GitRepository>
      */
     public function listRepositories(string $baseUrl, string $token): array;
+
+    /**
+     * @return array<int, GitBranch>
+     */
+    public function listBranches(
+        string $baseUrl,
+        string $token,
+        string $owner,
+        string $repository,
+    ): array;
 }
diff --git a/app/Actions/Git/Data/GitBranch.php b/app/Actions/Git/Data/GitBranch.php
new file mode 100644
index 0000000..e187bb6
--- /dev/null
+++ b/app/Actions/Git/Data/GitBranch.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace App\Actions\Git\Data;
+
+/**
+ * Provider-agnostic representation of a repository branch.
+ */
+final readonly class GitBranch
+{
+    public function __construct(
+        public string $name,
+    ) {}
+}
diff --git a/app/Actions/Git/Gitea/GiteaProviderClient.php b/app/Actions/Git/Gitea/GiteaProviderClient.php
index 155e21e..fa46478 100644
--- a/app/Actions/Git/Gitea/GiteaProviderClient.php
+++ b/app/Actions/Git/Gitea/GiteaProviderClient.php
@@ -4,6 +4,7 @@ namespace App\Actions\Git\Gitea;
 
 use App\Actions\Git\Contracts\GitProviderClient;
 use App\Actions\Git\Data\GitAuthenticatedUser;
+use App\Actions\Git\Data\GitBranch;
 use App\Actions\Git\Data\GitRepository;
 use App\Actions\Git\GitProviderKey;
 use Illuminate\Http\Client\PendingRequest;
@@ -75,6 +76,43 @@ class GiteaProviderClient implements GitProviderClient
         return $repositories;
     }
 
+    /**
+     * @return array<int, GitBranch>
+     */
+    public function listBranches(
+        string $baseUrl,
+        string $token,
+        string $owner,
+        string $repository,
+    ): array {
+        $page = 1;
+        $branches = [];
+
+        do {
+            /** @var array<int, array{name: string}> $payload */
+            $payload = $this->request($baseUrl, $token)
+                ->get(
+                    '/repos/'.rawurlencode($owner).'/'.rawurlencode($repository).'/branches',
+                    [
+                        'limit' => 100,
+                        'page' => $page,
+                    ],
+                )
+                ->throw()
+                ->json();
+
+            foreach ($payload as $branch) {
+                $branches[] = new GitBranch(
+                    name: $branch['name'],
+                );
+            }
+
+            $page++;
+        } while (count($payload) === 100);
+
+        return $branches;
+    }
+
     private function request(string $baseUrl, string $token): PendingRequest
     {
         return Http::acceptJson()
diff --git a/app/Actions/Git/ResolveTicketBranchMatches.php b/app/Actions/Git/ResolveTicketBranchMatches.php
new file mode 100644
index 0000000..dd8c8c4
--- /dev/null
+++ b/app/Actions/Git/ResolveTicketBranchMatches.php
@@ -0,0 +1,151 @@
+<?php
+
+namespace App\Actions\Git;
+
+use App\Actions\Git\Data\GitBranch;
+use App\Models\Project;
+use App\Models\RepositoryConnection;
+use App\Models\Ticket;
+use App\Models\User;
+use App\Models\UserGitConnection;
+use Illuminate\Support\Collection;
+use Throwable;
+
+class ResolveTicketBranchMatches
+{
+    public function __construct(
+        private readonly GitProviderManager $gitProviderManager,
+        private readonly TicketKeyReferenceMatcher $ticketKeyReferenceMatcher,
+    ) {}
+
+    /**
+     * @return array<int, array{
+     *     branches: array<int, array{name: string}>,
+     *     error: string|null,
+     *     repository_connection: array{
+     *         base_url: string,
+     *         created_at: string|null,
+     *         has_personal_access: bool,
+     *         id: int,
+     *         owner_name: string,
+     *         project_id: int,
+     *         provider: string,
+     *         provider_label: string,
+     *         provider_repository_id: string,
+     *         repository_full_name: string,
+     *         repository_name: string,
+     *         repository_url: string,
+     *         updated_at: string|null
+     *     }
+     * }>
+     */
+    public function handle(User $user, Project $project, Ticket $ticket): array
+    {
+        /** @var Collection<int, RepositoryConnection> $repositoryConnections */
+        $repositoryConnections = $project->repositoryConnections()
+            ->get();
+
+        return $repositoryConnections
+            ->map(function (RepositoryConnection $repositoryConnection) use ($ticket, $user): array {
+                $userGitConnection = $this->matchingUserGitConnection($user, $repositoryConnection);
+                $hasPersonalAccess = $userGitConnection !== null;
+
+                if ($userGitConnection === null) {
+                    return [
+                        'branches' => [],
+                        'error' => null,
+                        'repository_connection' => $this->repositoryConnectionPayload(
+                            $repositoryConnection,
+                            false,
+                        ),
+                    ];
+                }
+
+                try {
+                    $branches = collect(
+                        $this->gitProviderManager
+                            ->client($userGitConnection->provider)
+                            ->listBranches(
+                                $userGitConnection->base_url,
+                                $userGitConnection->api_token,
+                                $repositoryConnection->owner_name,
+                                $repositoryConnection->repository_name,
+                            ),
+                    )
+                        ->filter(fn (GitBranch $branch): bool => $this->ticketKeyReferenceMatcher->matches(
+                            $ticket->ticket_key,
+                            $branch->name,
+                        ))
+                        ->map(fn (GitBranch $branch): array => [
+                            'name' => $branch->name,
+                        ])
+                        ->values()
+                        ->all();
+
+                    $error = null;
+                } catch (Throwable) {
+                    $branches = [];
+                    $error = 'KanbanGit could not load branches from this repository right now.';
+                }
+
+                return [
+                    'branches' => $branches,
+                    'error' => $error,
+                    'repository_connection' => $this->repositoryConnectionPayload(
+                        $repositoryConnection,
+                        $hasPersonalAccess,
+                    ),
+                ];
+            })
+            ->values()
+            ->all();
+    }
+
+    /**
+     * @return array{
+     *     base_url: string,
+     *     created_at: string|null,
+     *     has_personal_access: bool,
+     *     id: int,
+     *     owner_name: string,
+     *     project_id: int,
+     *     provider: string,
+     *     provider_label: string,
+     *     provider_repository_id: string,
+     *     repository_full_name: string,
+     *     repository_name: string,
+     *     repository_url: string,
+     *     updated_at: string|null
+     * }
+     */
+    private function repositoryConnectionPayload(
+        RepositoryConnection $repositoryConnection,
+        bool $hasPersonalAccess,
+    ): array {
+        return [
+            'base_url' => $repositoryConnection->base_url,
+            'created_at' => $repositoryConnection->created_at?->toISOString(),
+            'has_personal_access' => $hasPersonalAccess,
+            'id' => $repositoryConnection->id,
+            'owner_name' => $repositoryConnection->owner_name,
+            'project_id' => $repositoryConnection->project_id,
+            'provider' => $repositoryConnection->provider->value,
+            'provider_label' => $repositoryConnection->provider->label(),
+            'provider_repository_id' => $repositoryConnection->provider_repository_id,
+            'repository_full_name' => $repositoryConnection->repository_full_name,
+            'repository_name' => $repositoryConnection->repository_name,
+            'repository_url' => $repositoryConnection->repository_url,
+            'updated_at' => $repositoryConnection->updated_at?->toISOString(),
+        ];
+    }
+
+    private function matchingUserGitConnection(
+        User $user,
+        RepositoryConnection $repositoryConnection,
+    ): ?UserGitConnection {
+        return $user->gitConnections()
+            ->where('provider', $repositoryConnection->provider)
+            ->where('base_url', $repositoryConnection->base_url)
+            ->first();
+    }
+}
diff --git a/app/Actions/Git/TicketKeyReferenceMatcher.php b/app/Actions/Git/TicketKeyReferenceMatcher.php
new file mode 100644
index 0000000..0966af5
--- /dev/null
+++ b/app/Actions/Git/TicketKeyReferenceMatcher.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace App\Actions\Git;
+
+class TicketKeyReferenceMatcher
+{
+    public function matches(string $ticketKey, string $referenceName): bool
+    {
+        return preg_match(
+            '/^'.preg_quote($ticketKey, '/').'(?=$|[-_\/])/',
+            $referenceName,
+        ) === 1;
+    }
+}
diff --git a/app/Http/Controllers/ProjectTicketController.php b/app/Http/Controllers/ProjectTicketController.php
index 47b12ad..7bd37b4 100644
--- a/app/Http/Controllers/ProjectTicketController.php
+++ b/app/Http/Controllers/ProjectTicketController.php
@@ -2,6 +2,7 @@
 
 namespace App\Http\Controllers;
 
+use App\Actions\Git\ResolveTicketBranchMatches;
 use App\Actions\ProjectPermissions\ProjectPermissionService;
 use App\Actions\Tickets\UpdateProjectTicket;
 use App\Http\Requests\UpdateProjectTicketRequest;
@@ -18,6 +19,7 @@ class ProjectTicketController extends Controller
 {
     public function __construct(
         private readonly ProjectPermissionService $projectPermissionService,
+        private readonly ResolveTicketBranchMatches $resolveTicketBranchMatches,
         private readonly UpdateProjectTicket $updateProjectTicket,
     ) {}
 
@@ -46,6 +48,11 @@ class ProjectTicketController extends Controller
                     'title' => $parentTicket->title,
                 ]),
             'project' => $project,
+            'repositoryBranches' => $this->resolveTicketBranchMatches->handle(
+                $request->user(),
+                $project,
+                $ticket,
+            ),
             'status' => session('status'),
             'ticket' => $ticket->load([
                 'fieldValues.ticketFieldDefinition',
diff --git a/docs/missing-features.md b/docs/missing-features.md
index ab39a07..2bd1b42 100644
--- a/docs/missing-features.md
+++ b/docs/missing-features.md
@@ -66,4 +66,6 @@
 
 - later:
   - if deleting ticket type select a new ticket type which all existing ticket should get or select delete all tickets of that type
-  - repository_connections check base Url maybe unnessecary?
\ No newline at end of file
+  - repository_connections check base Url maybe unnessecary?
+  - Git listBranches replace baseUrl, owner, rperoName with GItReprository
+  - replace Kanbangit with env App Name
\ No newline at end of file
diff --git a/resources/js/pages/projects/Ticket.vue b/resources/js/pages/projects/Ticket.vue
index bee5c84..af4faf0 100644
--- a/resources/js/pages/projects/Ticket.vue
+++ b/resources/js/pages/projects/Ticket.vue
@@ -1,5 +1,6 @@
 <script setup lang="ts">
 import { Form, useForm, Head, Link } from '@inertiajs/vue3';
+import { computed } from 'vue';
 import ProjectTicketLinkController from '@/actions/App/Http/Controllers/ProjectTicketLinkController';
 import ProjectTicketController from '@/actions/App/Http/Controllers/ProjectTicketController';
 import Heading from '@/components/Heading.vue';
@@ -17,6 +18,7 @@ import {
 import { Input } from '@/components/ui/input';
 import { Label } from '@/components/ui/label';
 import AppLayout from '@/layouts/AppLayout.vue';
+import { edit as editGitConnections } from '@/routes/git-connections';
 import { index as backlogIndex } from '@/routes/projects/backlog';
 import { index as boardIndex } from '@/routes/projects/board';
 import { index as projectIndex, show } from '@/routes/projects';
@@ -25,6 +27,15 @@ import type { BreadcrumbItem, ProjectTicketPageProps } from '@/types';
 
 const props = defineProps<ProjectTicketPageProps>();
 
+const visibleRepositoryBranches = computed(() =>
+    props.repositoryBranches.filter(
+        (repositoryBranch) =>
+            repositoryBranch.branches.length > 0 ||
+            repositoryBranch.error !== null ||
+            !repositoryBranch.repository_connection.has_personal_access,
+    ),
+);
+
 const breadcrumbs: BreadcrumbItem[] = [
     {
         title: 'Projects',
@@ -427,6 +438,106 @@ const formatDateTime = (value: string): string => {
                 </Card>
 
                 <div class="space-y-6">
+                    <Card class="h-fit">
+                        <CardHeader>
+                            <CardTitle>Branches</CardTitle>
+                            <CardDescription>
+                                Matching branches are discovered from linked
+                                repositories when the branch name starts with
+                                this ticket key.
+                            </CardDescription>
+                        </CardHeader>
+
+                        <CardContent class="space-y-4">
+                            <div
+                                v-if="visibleRepositoryBranches.length === 0"
+                                class="rounded-xl border border-dashed border-border px-4 py-6 text-sm text-muted-foreground"
+                            >
+                                No matching branches were found across the
+                                linked repositories you can access.
+                            </div>
+
+                            <div v-else class="space-y-3">
+                                <div
+                                    v-for="repositoryBranch in visibleRepositoryBranches"
+                                    :key="
+                                        repositoryBranch.repository_connection.id
+                                    "
+                                    class="rounded-xl border border-border px-4 py-4"
+                                >
+                                    <div
+                                        class="flex flex-wrap items-center gap-2"
+                                    >
+                                        <Badge variant="secondary">
+                                            {{
+                                                repositoryBranch
+                                                    .repository_connection
+                                                    .provider_label
+                                            }}
+                                        </Badge>
+                                        <span class="font-medium">
+                                            {{
+                                                repositoryBranch
+                                                    .repository_connection
+                                                    .repository_full_name
+                                            }}
+                                        </span>
+                                    </div>
+
+                                    <p
+                                        class="mt-2 text-sm text-muted-foreground"
+                                    >
+                                        {{
+                                            repositoryBranch
+                                                .repository_connection.base_url
+                                        }}
+                                    </p>
+
+                                    <div
+                                        v-if="
+                                            !repositoryBranch
+                                                .repository_connection
+                                                .has_personal_access
+                                        "
+                                        class="mt-3 space-y-3"
+                                    >
+                                        <p
+                                            class="text-sm text-muted-foreground"
+                                        >
+                                            Connect a matching Git account in
+                                            your user settings to inspect
+                                            branches for this repository.
+                                        </p>
+
+                                        <Button as-child variant="outline" size="sm">
+                                            <Link :href="editGitConnections()">
+                                                Open Git connections
+                                            </Link>
+                                        </Button>
+                                    </div>
+
+                                    <div
+                                        v-else-if="repositoryBranch.error"
+                                        class="mt-3 rounded-xl border border-amber-200 bg-amber-50 px-4 py-3 text-sm text-amber-900 dark:border-amber-900/70 dark:bg-amber-950/40 dark:text-amber-100"
+                                    >
+                                        {{ repositoryBranch.error }}
+                                    </div>
+
+                                    <div v-else class="mt-3 flex flex-wrap gap-2">
+                                        <Badge
+                                            v-for="branch in repositoryBranch.branches"
+                                            :key="branch.name"
+                                            variant="outline"
+                                            class="px-3 py-1"
+                                        >
+                                            {{ branch.name }}
+                                        </Badge>
+                                    </div>
+                                </div>
+                            </div>
+                        </CardContent>
+                    </Card>
+
                     <Card class="h-fit">
                         <CardHeader>
                             <CardTitle>Linked tickets</CardTitle>
diff --git a/resources/js/types/models/ticket-branch-model.ts b/resources/js/types/models/ticket-branch-model.ts
new file mode 100644
index 0000000..b326cdf
--- /dev/null
+++ b/resources/js/types/models/ticket-branch-model.ts
@@ -0,0 +1,3 @@
+export type TicketBranchModel = {
+    name: string;
+};
diff --git a/resources/js/types/models/ticket-repository-branch-model.ts b/resources/js/types/models/ticket-repository-branch-model.ts
new file mode 100644
index 0000000..16416ef
--- /dev/null
+++ b/resources/js/types/models/ticket-repository-branch-model.ts
@@ -0,0 +1,8 @@
+import type { RepositoryConnectionModel } from '@/types/models/repository-connection-model';
+import type { TicketBranchModel } from '@/types/models/ticket-branch-model';
+
+export type TicketRepositoryBranchModel = {
+    branches: TicketBranchModel[];
+    error: string | null;
+    repository_connection: RepositoryConnectionModel;
+};
diff --git a/resources/js/types/page-props.ts b/resources/js/types/page-props.ts
index 74fd467..e43a718 100644
--- a/resources/js/types/page-props.ts
+++ b/resources/js/types/page-props.ts
@@ -4,6 +4,7 @@ import type { ProjectModel } from '@/types/models/project-model';
 import type { RepositoryConnectionModel } from '@/types/models/repository-connection-model';
 import type { TeamModel } from '@/types/models/team-model';
 import type { TicketFieldDefinitionModel } from '@/types/models/ticket-field-definition-model';
+import type { TicketRepositoryBranchModel } from '@/types/models/ticket-repository-branch-model';
 import type { TicketLinkModel } from '@/types/models/ticket-link-model';
 import type { TicketLinkTypeModel } from '@/types/models/ticket-link-type-model';
 import type { TicketReferenceModel } from '@/types/models/ticket-reference-model';
@@ -101,6 +102,7 @@ export type ProjectTicketPageProps = {
     linkedTickets: TicketLinkModel[];
     parentTicketOptions: TicketReferenceModel[];
     project: ProjectModel;
+    repositoryBranches: TicketRepositoryBranchModel[];
     status?: string | null;
     ticket: TicketModel;
     ticketFieldDefinitions: TicketFieldDefinitionModel[];
diff --git a/tests/Feature/Git/GiteaProviderTest.php b/tests/Feature/Git/GiteaProviderTest.php
index dd4ec4a..9e3bf55 100644
--- a/tests/Feature/Git/GiteaProviderTest.php
+++ b/tests/Feature/Git/GiteaProviderTest.php
@@ -3,6 +3,7 @@
 namespace Tests\Feature\Git;
 
 use App\Actions\Git\Data\GitAuthenticatedUser;
+use App\Actions\Git\Data\GitBranch;
 use App\Actions\Git\Data\GitRepository;
 use App\Actions\Git\Gitea\GiteaProviderClient;
 use Illuminate\Foundation\Testing\RefreshDatabase;
@@ -80,4 +81,40 @@ class GiteaProviderTest extends TestCase
                 && $request->hasHeader('Authorization', 'token repo-token');
         });
     }
+
+    /**
+     * Ensure the provider lists branches for a specific repository.
+     */
+    public function test_provider_can_list_repository_branches(): void
+    {
+        Http::preventStrayRequests();
+        Http::fake([
+            'https://git.example.test/api/v1/repos/core-team/kanbangit/branches*' => Http::response([
+                [
+                    'name' => 'CORE-1-login-form',
+                ],
+                [
+                    'name' => 'main',
+                ],
+            ]),
+        ]);
+
+        $branches = app(GiteaProviderClient::class)->listBranches(
+            'https://git.example.test',
+            'branch-token',
+            'core-team',
+            'kanbangit',
+        );
+
+        $this->assertCount(2, $branches);
+        $this->assertContainsOnlyInstancesOf(GitBranch::class, $branches);
+        $this->assertSame('CORE-1-login-form', $branches[0]->name);
+
+        Http::assertSent(function ($request): bool {
+            return str_starts_with(
+                $request->url(),
+                'https://git.example.test/api/v1/repos/core-team/kanbangit/branches',
+            ) && $request->hasHeader('Authorization', 'token branch-token');
+        });
+    }
 }
diff --git a/tests/Feature/Projects/ProjectTicketControllerTest.php b/tests/Feature/Projects/ProjectTicketControllerTest.php
index 1dcad03..880cb48 100644
--- a/tests/Feature/Projects/ProjectTicketControllerTest.php
+++ b/tests/Feature/Projects/ProjectTicketControllerTest.php
@@ -5,6 +5,7 @@ namespace Tests\Feature\Projects;
 use App\Actions\ProjectPermissions\ProjectPermissionService;
 use App\Actions\ProjectTicketMetadata\InitializeProjectTicketMetadata;
 use App\Models\Project;
+use App\Models\RepositoryConnection;
 use App\Models\Ticket;
 use App\Models\TicketFieldDefinition;
 use App\Models\TicketFieldValue;
@@ -13,7 +14,9 @@ use App\Models\TicketLinkType;
 use App\Models\TicketPriority;
 use App\Models\TicketWorklogEntry;
 use App\Models\User;
+use App\Models\UserGitConnection;
 use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\Http;
 use Inertia\Testing\AssertableInertia as Assert;
 use Tests\TestCase;
 
@@ -97,10 +100,85 @@ class ProjectTicketControllerTest extends TestCase
                 ->where('ticket.worklog_entries.0.actor.name', $viewer->name)
                 ->where('linkedTickets.0.linked_ticket.ticket_key', 'CORE-2')
                 ->where('linkedTickets.0.ticket_link_type.label', 'Relates to')
+                ->where('repositoryBranches', [])
                 ->where('canEditTicket', false),
             );
     }
 
+    /**
+     * Ensure ticket details expose matching branches and inaccessible repository links.
+     */
+    public function test_ticket_details_include_matching_branches_and_inaccessible_repository_links(): void
+    {
+        Http::preventStrayRequests();
+        Http::fake([
+            'https://git.example.test/api/v1/repos/core-team/kanbangit/branches*' => Http::response([
+                ['name' => 'CORE-1-login-form'],
+                ['name' => 'CORE-1/fix-oauth'],
+                ['name' => 'CORE-10-should-not-match'],
+                ['name' => 'main'],
+            ]),
+        ]);
+
+        $viewer = User::factory()->create();
+        $project = Project::factory()->create([
+            'key' => 'CORE',
+        ]);
+
+        app(InitializeProjectTicketMetadata::class)->handle($project);
+
+        $priority = TicketPriority::factory()->for($project)->create([
+            'name' => 'Medium',
+            'position' => 1,
+        ]);
+
+        $ticket = Ticket::factory()->create([
+            'project_id' => $project->id,
+            'sequence_number' => 1,
+            'ticket_key' => 'CORE-1',
+            'ticket_priority_id' => $priority->id,
+            'ticket_type_id' => $project->ticketTypes()->firstOrFail()->id,
+            'title' => 'Branch detail test',
+        ]);
+
+        RepositoryConnection::factory()->for($project)->create([
+            'base_url' => 'https://git.example.test',
+            'owner_name' => 'core-team',
+            'provider_repository_id' => '501',
+            'repository_full_name' => 'core-team/kanbangit',
+            'repository_name' => 'kanbangit',
+            'repository_url' => 'https://git.example.test/core-team/kanbangit',
+        ]);
+        RepositoryConnection::factory()->for($project)->create([
+            'base_url' => 'https://git.other.test',
+            'owner_name' => 'other-team',
+            'provider_repository_id' => '902',
+            'repository_full_name' => 'other-team/mobile',
+            'repository_name' => 'mobile',
+            'repository_url' => 'https://git.other.test/other-team/mobile',
+        ]);
+
+        UserGitConnection::factory()->for($viewer)->create([
+            'base_url' => 'https://git.example.test',
+        ]);
+
+        app(ProjectPermissionService::class)->syncUserPermissions($project, $viewer, ['view']);
+
+        $this->actingAs($viewer)
+            ->get(route('projects.tickets.show', [$project, $ticket]))
+            ->assertOk()
+            ->assertInertia(fn (Assert $page) => $page
+                ->component('projects/Ticket')
+                ->where('repositoryBranches.0.repository_connection.repository_full_name', 'core-team/kanbangit')
+                ->has('repositoryBranches.0.branches', 2)
+                ->where('repositoryBranches.0.branches.0.name', 'CORE-1-login-form')
+                ->where('repositoryBranches.0.branches.1.name', 'CORE-1/fix-oauth')
+                ->where('repositoryBranches.1.repository_connection.repository_full_name', 'other-team/mobile')
+                ->where('repositoryBranches.1.repository_connection.has_personal_access', false)
+                ->where('repositoryBranches.1.branches', []),
+            );
+    }
+
     /**
      * Ensure updating ticket details requires the project edit permission.
      */