MCP Client Configuration Server

Instructions

Implementation Reference

• src/index.ts:343-400 (handler)

  The switch case that handles the 'add_server_configuration' tool execution. It validates inputs, reads or initializes the client config file, checks for existing servers, adds or updates the server configuration based on allow_override, writes the config back, and returns a success message.

  case 'add_server_configuration': {
    const client = validateClient(args.client);
    const serverName = args.server_name;
    const jsonConfig = args.json_config;
    const allowOverride = args.allow_override === true; // Default to false if not provided
    
    if (typeof serverName !== 'string') {
      throw new McpError(ErrorCode.InvalidParams, 'server_name must be a string');
    }
    
    if (typeof jsonConfig !== 'object' || jsonConfig === null) {
      throw new McpError(ErrorCode.InvalidParams, 'json_config must be a valid JSON object');
    }
    
    const configPath = getConfigPath(client);
    let config;
    
    try {
      config = await readConfigFile(configPath);
    } catch (error) {
      if (error instanceof McpError && error.code === ErrorCode.InternalError && error.message.includes('not found')) {
        // Create a new configuration if it doesn't exist
        config = { mcpServers: {} };
      } else {
        throw error;
      }
    }
    
    // Ensure mcpServers object exists
    if (!config.mcpServers) {
      config.mcpServers = {};
    }
    
    // Check if server with the same name already exists
    const serverExists = config.mcpServers.hasOwnProperty(serverName);
    if (serverExists && !allowOverride) {
      throw new McpError(
        ErrorCode.InvalidParams,
        `Server '${serverName}' already exists in ${client} configuration. Set allow_override to true to update it.`
      );
    }
    
    // Add or update the server configuration
    config.mcpServers[serverName] = jsonConfig;
    
    // Write the updated configuration
    await writeConfigFile(configPath, config);
    
    const action = serverExists ? 'updated' : 'added';
    return {
      content: [
        {
          type: 'text',
          text: `Server '${serverName}' configuration ${action} in ${client} configuration`,
        },
      ],
    };
  }

• src/index.ts:190-211 (schema)

  The inputSchema defining the parameters for the add_server_configuration tool: client, server_name, json_config (required), and optional allow_override.

  inputSchema: {
    type: 'object',
    properties: {
      client: {
        type: 'string',
        description: 'Client name (cline, roo_code, windsurf, claude)',
      },
      server_name: {
        type: 'string',
        description: 'Name of the server to add or update',
      },
      json_config: {
        type: 'object',
        description: 'Server configuration in JSON format',
      },
      allow_override: {
        type: 'boolean',
        description: 'Whether to allow overriding an existing server configuration with the same name (default: false)',
        default: false,
      },
    },
    required: ['client', 'server_name', 'json_config'],

• src/index.ts:187-213 (registration)

  The tool registration object in the ListTools response, declaring the name, description, and inputSchema for add_server_configuration.

  {
    name: 'add_server_configuration',
    description: 'Add or update a server configuration in a client configuration',
    inputSchema: {
      type: 'object',
      properties: {
        client: {
          type: 'string',
          description: 'Client name (cline, roo_code, windsurf, claude)',
        },
        server_name: {
          type: 'string',
          description: 'Name of the server to add or update',
        },
        json_config: {
          type: 'object',
          description: 'Server configuration in JSON format',
        },
        allow_override: {
          type: 'boolean',
          description: 'Whether to allow overriding an existing server configuration with the same name (default: false)',
          default: false,
        },
      },
      required: ['client', 'server_name', 'json_config'],
    },
  },