n8n MCP Server

Instructions

Implementation Reference

• src/index.ts:657-678 (handler)

  The main handler function for the 'get_node_type' MCP tool. It calls the N8nClient to fetch the node type by name and returns it as JSON or an error if not found.
  private async handleGetNodeType(args: { type: string }) { const nodeType = await this.n8nClient.getNodeTypeByName(args.type); if (!nodeType) { return { content: [ { type: 'text', text: JSON.stringify(jsonError(`Node type '${args.type}' not found. Use list_node_types to see available types.`, 'NOT_FOUND'), null, 2), }, ], }; } return { content: [ { type: 'text', text: JSON.stringify(jsonSuccess(nodeType), null, 2), }, ], }; }
• src/index.ts:110-123 (schema)

  The input schema and metadata for the 'get_node_type' tool, defining the expected 'type' parameter.
  { name: 'get_node_type', description: 'Get details about a specific n8n node type', inputSchema: { type: 'object', properties: { type: { type: 'string', description: 'The node type name (e.g., n8n-nodes-base.httpRequest)', }, }, required: ['type'], }, },
• src/index.ts:253-254 (registration)

  The switch case registration that routes CallTool requests for 'get_node_type' to the handler method.
  case 'get_node_type': return await this.handleGetNodeType(request.params.arguments as { type: string });
• src/n8n-client.ts:286-291 (helper)

  Helper method in N8nClient that delegates to node-registry's getNodeType.
  async getNodeTypeByName(typeName: string): Promise<N8nNodeType | null> { // Try to get from n8n API first (if available in future) // For now, use curated catalog const nodeType = getNodeType(typeName); return nodeType || null; }
• src/node-registry.ts:393-395 (helper)

  Core lookup function that retrieves node type definition from the static NODE_CATALOG.
  export function getNodeType(typeName: string): N8nNodeType | undefined { return NODE_CATALOG[typeName]; }