GitLab MCP Server

Instructions

Implementation Reference

• src/handlers/users-groups-handlers.ts:78-94 (handler)

  The core handler function that implements the gitlab_add_group_member tool logic, extracting parameters and calling the usersGroupsManager to add a group member.

  /**
   * Add group member handler
   */
  export const addGroupMember: ToolHandler = async (params, context) => {
    const { group_id, user_id, access_level, expires_at } = params.arguments || {};
    if (!group_id || !user_id || !access_level) {
      throw new McpError(ErrorCode.InvalidParams, 'group_id, user_id, and access_level are required');
    }
    
    const data = await context.usersGroupsManager.addGroupMember(
      group_id as string | number,
      user_id as number,
      access_level as number,
      expires_at as string | undefined
    );
    return formatResponse(data);
  };

• src/utils/tools-data.ts:794-816 (schema)

  The input schema and description definition for the gitlab_add_group_member tool.

  {
    name: 'gitlab_add_group_member',
    description: 'Add a user to a group',
    inputSchema: {
      type: 'object',
      properties: {
        group_id: {
          type: 'string',
          description: 'The ID or URL-encoded path of the group'
        },
        user_id: {
          type: 'number',
          description: 'The ID of the user'
        },
        access_level: {
          type: 'number',
          description: 'Access level (10=Guest, 20=Reporter, 30=Developer, 40=Maintainer, 50=Owner)',
          enum: [10, 20, 30, 40, 50]
        }
      },
      required: ['group_id', 'user_id', 'access_level']
    }
  },

• src/utils/tool-registry.ts:68-68 (registration)

  Registration of the gitlab_add_group_member tool in the central tool registry, mapping the tool name to its handler function.

  gitlab_add_group_member: usersGroupsHandlers.addGroupMember,

• src/utils/tool-registry.ts:17-17 (registration)

  Import of the usersGroupsHandlers module containing the addGroupMember handler.

  import * as usersGroupsHandlers from "../handlers/users-groups-handlers.js";