Daniel Rosehill's MCP Installer

Instructions

Implementation Reference

• src/index.ts:214-249 (handler)

  Main handler logic for the 'list_installed' tool. Handles requests for a specific client or all clients by calling helper functions to retrieve client info and installed MCPs, then formats and returns JSON response.

  case 'list_installed': {
    const clientArg = (args?.client as string) || 'all';
  
    if (clientArg === 'all') {
      const clientInfo = getAllClientInfo();
      const result: Record<string, { path: string; exists: boolean; mcps: string[] }> = {};
  
      for (const [client, info] of Object.entries(clientInfo)) {
        const installed = getInstalledMcps(client as ClientType);
        result[client] = {
          path: info.path,
          exists: info.exists,
          mcps: Object.keys(installed)
        };
      }
  
      return {
        content: [{
          type: 'text',
          text: JSON.stringify(result, null, 2)
        }]
      };
    } else {
      const installed = getInstalledMcps(clientArg as ClientType);
      return {
        content: [{
          type: 'text',
          text: JSON.stringify({
            client: clientArg,
            count: Object.keys(installed).length,
            mcps: Object.keys(installed)
          }, null, 2)
        }]
      };
    }
  }

• src/index.ts:56-70 (schema)

  Tool schema definition including name, description, and inputSchema for the 'list_installed' tool, which specifies the 'client' parameter.

  {
    name: 'list_installed',
    description: 'Show what MCPs are already installed in a specific client or all clients.',
    inputSchema: {
      type: 'object',
      properties: {
        client: {
          type: 'string',
          enum: ['claude-code', 'cursor', 'vscode', 'all'],
          description: 'Client to check',
          default: 'all'
        }
      }
    }
  },

• src/clients.ts:46-52 (helper)

  Helper function getAllClientInfo() that returns configuration info for all supported clients, used when listing installed MCPs for all clients.

  export function getAllClientInfo(): Record<ClientType, ClientInfo> {
    const result: Record<ClientType, ClientInfo> = {} as Record<ClientType, ClientInfo>;
    for (const client of Object.keys(CLIENT_CONFIGS) as ClientType[]) {
      result[client] = getClientInfo(client);
    }
    return result;
  }

• src/clients.ts:99-102 (helper)

  Helper function getInstalledMcps(client) that reads the client's settings and returns the map of installed MCP servers.

  export function getInstalledMcps(client: ClientType): Record<string, McpServerConfig> {
    const settings = readClientSettings(client);
    return settings.mcpServers || {};
  }