PyGithub MCP Server

Instructions

Args:
    params: Parameters for getting an issue including:
        - owner: Repository owner (user or organization)
        - repo: Repository name
        - issue_number: Issue number to retrieve

Returns:
    Issue details from GitHub API

Implementation Reference

• src/pygithub_mcp_server/tools/issues/tools.py:127-160 (handler)

  MCP tool handler for 'get_issue': validates input params, delegates to operations.issues.get_issue, returns formatted JSON response or error.

  @tool()
  def get_issue(params: GetIssueParams) -> dict:
      """Get details about a specific issue.
      
      Args:
          params: Parameters for getting an issue including:
              - owner: Repository owner (user or organization)
              - repo: Repository name
              - issue_number: Issue number to retrieve
      
      Returns:
          Issue details from GitHub API
      """
      try:
          logger.debug(f"get_issue called with params: {params}")
          # Pass the Pydantic model directly to the operation
          result = issues.get_issue(params)
          logger.debug(f"Got result: {result}")
          return {"content": [{"type": "text", "text": json.dumps(result, indent=2)}]}
      except GitHubError as e:
          logger.error(f"GitHub error: {e}")
          return {
              "content": [{"type": "error", "text": format_github_error(e)}],
              "is_error": True
          }
      except Exception as e:
          logger.error(f"Unexpected error: {e}")
          logger.error(traceback.format_exc())
          error_msg = str(e) if str(e) else "An unexpected error occurred"
          return {
              "content": [{"type": "error", "text": f"Internal server error: {error_msg}"}],
              "is_error": True
          }

• src/pygithub_mcp_server/schemas/issues.py:159-165 (schema)

  Pydantic input schema for get_issue tool: inherits RepositoryRef (owner/repo), adds required issue_number.

  class GetIssueParams(RepositoryRef):
      """Parameters for getting an issue."""
  
      model_config = ConfigDict(strict=True)
      
      issue_number: int = Field(..., description="Issue number to retrieve", strict=True)

• src/pygithub_mcp_server/operations/issues.py:80-99 (helper)

  Core operation logic: fetches issue via PyGithub client, converts to dict using convert_issue.

  def get_issue(params: GetIssueParams) -> Dict[str, Any]:
      """Get details about a specific issue.
  
      Args:
          params: Validated parameters for getting an issue
  
      Returns:
          Issue details from GitHub API
  
      Raises:
          GitHubError: If the API request fails
      """
      try:
          client = GitHubClient.get_instance()
          repository = client.get_repo(f"{params.owner}/{params.repo}")
          issue = repository.get_issue(params.issue_number)
          return convert_issue(issue)
      except GithubException as e:
          raise GitHubClient.get_instance()._handle_github_exception(e)

• src/pygithub_mcp_server/tools/issues/tools.py:439-463 (registration)

  Registers the get_issue tool (included in issue_tools list) via register_tools utility with the FastMCP server instance.

  def register(mcp: FastMCP) -> None:
      """Register all issue tools with the MCP server.
      
      Args:
          mcp: The MCP server instance
      """
      from pygithub_mcp_server.tools import register_tools
      
      # List of all issue tools to register
      issue_tools = [
          create_issue,
          list_issues,
          get_issue,
          update_issue,
          add_issue_comment,
          list_issue_comments,
          update_issue_comment,
          delete_issue_comment,
          add_issue_labels,
          remove_issue_label,
      ]
      
      register_tools(mcp, issue_tools)
      logger.debug(f"Registered {len(issue_tools)} issue tools")