github · beccccaboo · Aug 15, 2025 · Aug 15, 2025 · Aug 15, 2025 · Aug 15, 2025
@@ -244,7 +244,7 @@ For other MCP host applications, please refer to our installation guides:
 - **[Cursor](docs/installation-guides/install-cursor.md)** - Installation guide for Cursor IDE  
 - **[Windsurf](docs/installation-guides/install-windsurf.md)** - Installation guide for Windsurf IDE
 
-For a complete overview of all installation options, see our **[Installation Guides Index](docs/installation-guides/installation-guides.md)**.
+For a complete overview of all installation options, see our **[Installation Guides Index](docs/installation-guides)**.
 
 > **Note:** Any host application that supports local MCP servers should be able to access the local GitHub MCP server. However, the specific configuration process, syntax and stability of the integration will vary by host application. While many may follow a similar format to the examples above, this is not guaranteed. Please refer to your host application's documentation for the correct MCP configuration syntax and setup process.
 
@@ -865,6 +865,12 @@ The following sets of tools are available (all are on by default):
   - `repo`: Repository name (string, required)
   - `sha`: Commit SHA, branch or tag name to list commits of. If not provided, uses the default branch of the repository. If a commit SHA is provided, will list commits up to that SHA. (string, optional)
 
+- **list_repository_contributors** - List repository contributors
+  - `owner`: Repository owner (string, required)
+  - `repo`: Repository name (string, required)
+  - `page`: Page number for pagination (min 1) (number, optional)
+  - `perPage`: Results per page for pagination (min 1, max 100) (number, optional)
+
 - **list_releases** - List releases
   - `owner`: Repository owner (string, required)
   - `page`: Page number for pagination (min 1) (number, optional)

@@ -0,0 +1,36 @@
+{
+  "annotations": {
+    "title": "List repository contributors",
+    "readOnlyHint": true
+  },
+  "description": "Get list of contributors for a GitHub repository. Returns at least 30 results per page by default, but can return more if specified using the perPage parameter (up to 100).",
+  "inputSchema": {
+    "properties": {
+      "owner": {
+        "description": "Repository owner",
+        "type": "string"
+      },
+      "page": {
+        "description": "Page number for pagination (min 1)",
+        "minimum": 1,
+        "type": "number"
+      },
+      "perPage": {
+        "description": "Results per page for pagination (min 1, max 100)",
+        "maximum": 100,
+        "minimum": 1,
+        "type": "number"
+      },
+      "repo": {
+        "description": "Repository name",
+        "type": "string"
+      }
+    },
+    "required": [
+      "owner",
+      "repo"
+    ],
+    "type": "object"
+  },
+  "name": "list_repository_contributors"
+}
@@ -183,6 +183,76 @@ func ListCommits(getClient GetClientFn, t translations.TranslationHelperFunc) (t
 		}
 }
 
+// ListRepositoryContributors creates a tool to get contributors of a repository.
+func ListRepositoryContributors(getClient GetClientFn, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
+	return mcp.NewTool("list_repository_contributors",
+			mcp.WithDescription(t("TOOL_LIST_REPOSITORY_CONTRIBUTORS_DESCRIPTION", "Get list of contributors for a GitHub repository. Returns at least 30 results per page by default, but can return more if specified using the perPage parameter (up to 100).")),
+			mcp.WithToolAnnotation(mcp.ToolAnnotation{
+				Title:        t("TOOL_LIST_REPOSITORY_CONTRIBUTORS_USER_TITLE", "List repository contributors"),
+				ReadOnlyHint: ToBoolPtr(true),
+			}),
+			mcp.WithString("owner",
+				mcp.Required(),
+				mcp.Description("Repository owner"),
+			),
+			mcp.WithString("repo",
+				mcp.Required(),
+				mcp.Description("Repository name"),
+			),
+			WithPagination(),
+		),
+		func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
+			owner, err := RequiredParam[string](request, "owner")
+			if err != nil {
+				return mcp.NewToolResultError(err.Error()), nil
+			}
+			repo, err := RequiredParam[string](request, "repo")
+			if err != nil {
+				return mcp.NewToolResultError(err.Error()), nil
+			}
+			pagination, err := OptionalPaginationParams(request)
+			if err != nil {
+				return mcp.NewToolResultError(err.Error()), nil
+			}
+
+			opts := &github.ListContributorsOptions{
+				ListOptions: github.ListOptions{
+					Page:    pagination.Page,
+					PerPage: pagination.PerPage,
+				},
+			}
+
+			client, err := getClient(ctx)
+			if err != nil {
+				return nil, fmt.Errorf("failed to get GitHub client: %w", err)
+			}
+			contributors, resp, err := client.Repositories.ListContributors(ctx, owner, repo, opts)
+			if err != nil {
+				return ghErrors.NewGitHubAPIErrorResponse(ctx,
+					fmt.Sprintf("failed to list contributors for repository: %s/%s", owner, repo),
+					resp,
+					err,
+				), nil
+			}
+			defer func() { _ = resp.Body.Close() }()
+
+			if resp.StatusCode != http.StatusOK {
+				body, err := io.ReadAll(resp.Body)
+				if err != nil {
+					return nil, fmt.Errorf("failed to read response body: %w", err)
+				}
+				return mcp.NewToolResultError(fmt.Sprintf("failed to list contributors: %s", string(body))), nil
+			}
+
+			r, err := json.Marshal(contributors)
+			if err != nil {
+				return nil, fmt.Errorf("failed to marshal response: %w", err)
+			}
+
+			return mcp.NewToolResultText(string(r)), nil
+		}
+}
+
 // ListBranches creates a tool to list branches in a GitHub repository.
 func ListBranches(getClient GetClientFn, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
 	return mcp.NewTool("list_branches",

@@ -2629,3 +2629,186 @@ func Test_resolveGitReference(t *testing.T) {
 		})
 	}
 }
+
+func Test_ListRepositoryContributors(t *testing.T) {
+	// Verify tool definition once
+	mockClient := github.NewClient(nil)
+	tool, _ := ListRepositoryContributors(stubGetClientFn(mockClient), translations.NullTranslationHelper)
+	require.NoError(t, toolsnaps.Test(tool.Name, tool))
+
+	assert.Equal(t, "list_repository_contributors", tool.Name)
+	assert.NotEmpty(t, tool.Description)
+	assert.Contains(t, tool.InputSchema.Properties, "owner")
+	assert.Contains(t, tool.InputSchema.Properties, "repo")
+	assert.Contains(t, tool.InputSchema.Properties, "page")
+	assert.Contains(t, tool.InputSchema.Properties, "perPage")
+	assert.ElementsMatch(t, tool.InputSchema.Required, []string{"owner", "repo"})
+
+	// Setup mock contributors for success case
+	mockContributors := []*github.Contributor{
+		{
+			Login:             github.Ptr("user1"),
+			ID:                github.Int64(1),
+			NodeID:            github.Ptr("MDQ6VXNlcjE="),
+			AvatarURL:         github.Ptr("https://github.com/images/error/user1_happy.gif"),
+			GravatarID:        github.Ptr(""),
+			URL:               github.Ptr("https://api.github.com/users/user1"),
+			HTMLURL:           github.Ptr("https://github.com/user1"),
+			FollowersURL:      github.Ptr("https://api.github.com/users/user1/followers"),
+			FollowingURL:      github.Ptr("https://api.github.com/users/user1/following{/other_user}"),
+			GistsURL:          github.Ptr("https://api.github.com/users/user1/gists{/gist_id}"),
+			StarredURL:        github.Ptr("https://api.github.com/users/user1/starred{/owner}{/repo}"),
+			SubscriptionsURL:  github.Ptr("https://api.github.com/users/user1/subscriptions"),
+			OrganizationsURL:  github.Ptr("https://api.github.com/users/user1/orgs"),
+			ReposURL:          github.Ptr("https://api.github.com/users/user1/repos"),
+			EventsURL:         github.Ptr("https://api.github.com/users/user1/events{/privacy}"),
+			ReceivedEventsURL: github.Ptr("https://api.github.com/users/user1/received_events"),
+			Type:              github.Ptr("User"),
+			SiteAdmin:         github.Bool(false),
+			Contributions:     github.Int(42),
+		},
+		{
+			Login:             github.Ptr("user2"),
+			ID:                github.Int64(2),
+			NodeID:            github.Ptr("MDQ6VXNlcjI="),
+			AvatarURL:         github.Ptr("https://github.com/images/error/user2_happy.gif"),
+			GravatarID:        github.Ptr(""),
+			URL:               github.Ptr("https://api.github.com/users/user2"),
+			HTMLURL:           github.Ptr("https://github.com/user2"),
+			FollowersURL:      github.Ptr("https://api.github.com/users/user2/followers"),
+			FollowingURL:      github.Ptr("https://api.github.com/users/user2/following{/other_user}"),
+			GistsURL:          github.Ptr("https://api.github.com/users/user2/gists{/gist_id}"),
+			StarredURL:        github.Ptr("https://api.github.com/users/user2/starred{/owner}{/repo}"),
+			SubscriptionsURL:  github.Ptr("https://api.github.com/users/user2/subscriptions"),
+			OrganizationsURL:  github.Ptr("https://api.github.com/users/user2/orgs"),
+			ReposURL:          github.Ptr("https://api.github.com/users/user2/repos"),
+			EventsURL:         github.Ptr("https://api.github.com/users/user2/events{/privacy}"),
+			ReceivedEventsURL: github.Ptr("https://api.github.com/users/user2/received_events"),
+			Type:              github.Ptr("User"),
+			SiteAdmin:         github.Bool(false),
+			Contributions:     github.Int(15),
+		},
+	}
+
+	tests := []struct {
+		name                string
+		mockedClient        *http.Client
+		requestArgs         map[string]interface{}
+		expectError         bool
+		expectedContributors []*github.Contributor
+		expectedErrMsg      string
+	}{
+		{
+			name: "successful contributors fetch with default params",
+			mockedClient: mock.NewMockedHTTPClient(
+				mock.WithRequestMatch(
+					mock.GetReposContributorsByOwnerByRepo,
+					mockContributors,
+				),
+			),
+			requestArgs: map[string]interface{}{
+				"owner": "owner",
+				"repo":  "repo",
+			},
+			expectError:         false,
+			expectedContributors: mockContributors,
+		},
+		{
+			name: "successful contributors fetch with pagination",
+			mockedClient: mock.NewMockedHTTPClient(
+				mock.WithRequestMatchHandler(
+					mock.GetReposContributorsByOwnerByRepo,
+					expectQueryParams(t, map[string]string{
+						"page":     "2",
+						"per_page": "50",
+					}).andThen(
+						mockResponse(t, http.StatusOK, mockContributors),
+					),
+				),
+			),
+			requestArgs: map[string]interface{}{
+				"owner":    "owner",
+				"repo":     "repo",
+				"page":     float64(2),
+				"perPage":  float64(50),
+			},
+			expectError:         false,
+			expectedContributors: mockContributors,
+		},
+		{
+			name: "missing required parameter owner",
+			mockedClient: mock.NewMockedHTTPClient(),
+			requestArgs: map[string]interface{}{
+				"repo": "repo",
+			},
+			expectError:    true,
+			expectedErrMsg: "missing required parameter: owner",
+		},
+		{
+			name: "missing required parameter repo",
+			mockedClient: mock.NewMockedHTTPClient(),
+			requestArgs: map[string]interface{}{
+				"owner": "owner",
+			},
+			expectError:    true,
+			expectedErrMsg: "missing required parameter: repo",
+		},
+		{
+			name: "GitHub API error",
+			mockedClient: mock.NewMockedHTTPClient(
+				mock.WithRequestMatchHandler(
+					mock.GetReposContributorsByOwnerByRepo,
+					http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+						w.WriteHeader(http.StatusNotFound)
+						_, _ = w.Write([]byte(`{"message": "Not Found"}`))
+					}),
+				),
+			),
+			requestArgs: map[string]interface{}{
+				"owner": "owner",
+				"repo":  "repo",
+			},
+			expectError:    true,
+			expectedErrMsg: "failed to list contributors for repository: owner/repo",
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			// Setup client with mock
+			client := github.NewClient(tc.mockedClient)
+			_, handler := ListRepositoryContributors(stubGetClientFn(client), translations.NullTranslationHelper)
+
+			// Create call request
+			request := createMCPRequest(tc.requestArgs)
+
+			// Call handler
+			result, err := handler(context.Background(), request)
+
+			// Verify results
+			if tc.expectError {
+				require.NoError(t, err)
+				require.True(t, result.IsError)
+				errorContent := getErrorResult(t, result)
+				assert.Contains(t, errorContent.Text, tc.expectedErrMsg)
+				return
+			}
+
+			require.NoError(t, err)
+			require.False(t, result.IsError)
+
+			// Parse the result and get the text content if no error
+			textContent := getTextResult(t, result)
+
+			// Unmarshal and verify the result
+			var returnedContributors []*github.Contributor
+			err = json.Unmarshal([]byte(textContent.Text), &returnedContributors)
+			require.NoError(t, err)
+			assert.Len(t, returnedContributors, len(tc.expectedContributors))
+			for i, contributor := range returnedContributors {
+				assert.Equal(t, tc.expectedContributors[i].GetLogin(), contributor.GetLogin())
+				assert.Equal(t, tc.expectedContributors[i].GetContributions(), contributor.GetContributions())
+			}
+		})
+	}
+}
@@ -26,6 +26,7 @@ func DefaultToolsetGroup(readOnly bool, getClient GetClientFn, getGQLClient GetG
 			toolsets.NewServerTool(SearchRepositories(getClient, t)),
 			toolsets.NewServerTool(GetFileContents(getClient, getRawClient, t)),
 			toolsets.NewServerTool(ListCommits(getClient, t)),
+			toolsets.NewServerTool(ListRepositoryContributors(getClient, t)),
 			toolsets.NewServerTool(SearchCode(getClient, t)),
 			toolsets.NewServerTool(GetCommit(getClient, t)),
 			toolsets.NewServerTool(ListBranches(getClient, t)),

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# Test script for list_repository_contributors function
+# Usage: ./script/list-repository-contributors <owner> <repo>
+
+if [ $# -ne 2 ]; then
+    echo "Usage: $0 <owner> <repo>"
+    echo "Example: $0 octocat Hello-World"
+    exit 1
+fi
+
+OWNER=$1
+REPO=$2
+
+echo "Testing list_repository_contributors for $OWNER/$REPO"
+
+echo "{\"jsonrpc\":\"2.0\",\"id\":1,\"params\":{\"name\":\"list_repository_contributors\",\"arguments\":{\"owner\":\"$OWNER\",\"repo\":\"$REPO\"}},\"method\":\"tools/call\"}" | go run cmd/github-mcp-server/main.go stdio | jq .