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https://github.com/czlonkowski/n8n-mcp.git
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chore: add pre-built dist folder for npx usage
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thesved
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Romuald Członkowski
Romuald Członkowski
parent
a70d96a373
commit
5057481e70
260
dist/n8n/MCPNode.node.js
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260
dist/n8n/MCPNode.node.js
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.MCPNode = void 0;
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const n8n_workflow_1 = require("n8n-workflow");
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const mcp_client_1 = require("../utils/mcp-client");
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const bridge_1 = require("../utils/bridge");
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class MCPNode {
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constructor() {
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this.description = {
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displayName: 'MCP',
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name: 'mcp',
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icon: 'file:mcp.svg',
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group: ['transform'],
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version: 1,
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description: 'Interact with Model Context Protocol (MCP) servers',
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defaults: {
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name: 'MCP',
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},
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inputs: ['main'],
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outputs: ['main'],
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credentials: [
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{
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name: 'mcpApi',
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required: true,
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},
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],
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properties: [
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{
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displayName: 'Operation',
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name: 'operation',
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type: 'options',
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noDataExpression: true,
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options: [
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{
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name: 'Call Tool',
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value: 'callTool',
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description: 'Execute an MCP tool',
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},
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{
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name: 'List Tools',
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value: 'listTools',
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description: 'List available MCP tools',
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},
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{
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name: 'Read Resource',
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value: 'readResource',
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description: 'Read an MCP resource',
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},
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{
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name: 'List Resources',
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value: 'listResources',
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description: 'List available MCP resources',
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},
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{
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name: 'Get Prompt',
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value: 'getPrompt',
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description: 'Get an MCP prompt',
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},
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{
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name: 'List Prompts',
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value: 'listPrompts',
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description: 'List available MCP prompts',
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},
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],
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default: 'callTool',
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},
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{
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displayName: 'Tool Name',
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name: 'toolName',
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type: 'string',
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required: true,
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displayOptions: {
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show: {
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operation: ['callTool'],
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},
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},
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default: '',
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description: 'Name of the MCP tool to execute',
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},
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{
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displayName: 'Tool Arguments',
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name: 'toolArguments',
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type: 'json',
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required: false,
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displayOptions: {
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show: {
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operation: ['callTool'],
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},
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},
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default: '{}',
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description: 'Arguments to pass to the MCP tool',
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},
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{
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displayName: 'Resource URI',
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name: 'resourceUri',
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type: 'string',
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required: true,
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displayOptions: {
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show: {
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operation: ['readResource'],
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},
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},
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default: '',
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description: 'URI of the MCP resource to read',
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},
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{
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displayName: 'Prompt Name',
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name: 'promptName',
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type: 'string',
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required: true,
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displayOptions: {
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show: {
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operation: ['getPrompt'],
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},
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},
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default: '',
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description: 'Name of the MCP prompt to retrieve',
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},
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{
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displayName: 'Prompt Arguments',
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name: 'promptArguments',
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type: 'json',
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required: false,
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displayOptions: {
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show: {
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operation: ['getPrompt'],
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},
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},
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default: '{}',
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description: 'Arguments to pass to the MCP prompt',
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},
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],
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};
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}
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async execute() {
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const items = this.getInputData();
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const returnData = [];
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const operation = this.getNodeParameter('operation', 0);
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const credentials = await this.getCredentials('mcpApi');
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for (let itemIndex = 0; itemIndex < items.length; itemIndex++) {
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try {
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let result;
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switch (operation) {
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case 'callTool':
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const toolName = this.getNodeParameter('toolName', itemIndex);
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const toolArgumentsJson = this.getNodeParameter('toolArguments', itemIndex);
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const toolArguments = JSON.parse(toolArgumentsJson);
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result = await this.callMCPTool(credentials, toolName, toolArguments);
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break;
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case 'listTools':
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result = await this.listMCPTools(credentials);
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break;
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case 'readResource':
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const resourceUri = this.getNodeParameter('resourceUri', itemIndex);
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result = await this.readMCPResource(credentials, resourceUri);
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break;
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case 'listResources':
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result = await this.listMCPResources(credentials);
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break;
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case 'getPrompt':
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const promptName = this.getNodeParameter('promptName', itemIndex);
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const promptArgumentsJson = this.getNodeParameter('promptArguments', itemIndex);
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const promptArguments = JSON.parse(promptArgumentsJson);
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result = await this.getMCPPrompt(credentials, promptName, promptArguments);
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break;
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case 'listPrompts':
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result = await this.listMCPPrompts(credentials);
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break;
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default:
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throw new n8n_workflow_1.NodeOperationError(this.getNode(), `Unknown operation: ${operation}`);
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}
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returnData.push({
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json: result,
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pairedItem: itemIndex,
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});
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}
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catch (error) {
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if (this.continueOnFail()) {
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returnData.push({
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json: {
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error: error instanceof Error ? error.message : 'Unknown error',
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},
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pairedItem: itemIndex,
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});
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continue;
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}
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throw error;
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}
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}
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return [returnData];
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}
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async getMCPClient(credentials) {
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const client = new mcp_client_1.MCPClient({
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serverUrl: credentials.serverUrl,
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authToken: credentials.authToken,
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connectionType: credentials.connectionType || 'websocket',
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});
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await client.connect();
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return client;
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}
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async callMCPTool(credentials, toolName, args) {
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const client = await this.getMCPClient(credentials);
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try {
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const result = await client.callTool(toolName, args);
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return bridge_1.N8NMCPBridge.mcpToN8NExecutionData(result).json;
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}
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finally {
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await client.disconnect();
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}
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}
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async listMCPTools(credentials) {
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const client = await this.getMCPClient(credentials);
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try {
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return await client.listTools();
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}
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finally {
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await client.disconnect();
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}
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}
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async readMCPResource(credentials, uri) {
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const client = await this.getMCPClient(credentials);
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try {
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const result = await client.readResource(uri);
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return bridge_1.N8NMCPBridge.mcpToN8NExecutionData(result).json;
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}
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finally {
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await client.disconnect();
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}
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}
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async listMCPResources(credentials) {
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const client = await this.getMCPClient(credentials);
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try {
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return await client.listResources();
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}
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finally {
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await client.disconnect();
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}
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}
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async getMCPPrompt(credentials, promptName, args) {
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const client = await this.getMCPClient(credentials);
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try {
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const result = await client.getPrompt(promptName, args);
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return bridge_1.N8NMCPBridge.mcpPromptArgsToN8N(result);
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}
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finally {
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await client.disconnect();
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}
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}
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async listMCPPrompts(credentials) {
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const client = await this.getMCPClient(credentials);
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try {
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return await client.listPrompts();
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}
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finally {
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await client.disconnect();
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}
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}
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}
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exports.MCPNode = MCPNode;
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//# sourceMappingURL=MCPNode.node.js.map
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