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HenryHengZJHenryHengZJ
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Feature/MCP (Model Context Protocol) (#4134)
add mcp tools
1 parent 9c22bee commit 713ed26

21 files changed

+1321
-105
lines changed

‎packages/components/credentials/PostgresUrl.credential.ts

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import { INodeParams, INodeCredential } from '../src/Interface'
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class PostgresUrl implements INodeCredential {
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label: string
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name: string
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version: number
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description: string
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inputs: INodeParams[]
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constructor() {
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this.label = 'Postgres URL'
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this.name = 'PostgresUrl'
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this.version = 1.0
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this.inputs = [
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{
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label: 'Postgres URL',
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name: 'postgresUrl',
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type: 'string',
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placeholder: 'postgresql://localhost/mydb'
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}
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]
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}
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}
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module.exports = { credClass: PostgresUrl }

‎packages/components/credentials/SlackApi.credential.ts

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import { INodeParams, INodeCredential } from '../src/Interface'
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class SlackApi implements INodeCredential {
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label: string
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name: string
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version: number
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description: string
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inputs: INodeParams[]
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constructor() {
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this.label = 'Slack API'
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this.name = 'slackApi'
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this.version = 1.0
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this.description =
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'Refer to <a target="_blank" href="https://github.com/modelcontextprotocol/servers/tree/main/src/slack">official guide</a> on how to get botToken and teamId on Slack'
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this.inputs = [
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{
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label: 'Bot Token',
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name: 'botToken',
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type: 'password'
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},
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{
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label: 'Team ID',
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name: 'teamId',
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type: 'string',
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placeholder: '<SLACK_TEAM_ID>'
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}
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]
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}
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}
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module.exports = { credClass: SlackApi }

‎packages/components/nodes/tools/CurrentDateTime/CurrentDateTime.ts

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import { z } from 'zod'
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import { INode } from '../../../src/Interface'
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import { DynamicStructuredTool } from '../CustomTool/core'
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const code = `
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const now = new Date();
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// Format date as YYYY-MM-DD
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const date = now.toISOString().split('T')[0];
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// Get time in HH:MM:SS format
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const time = now.toTimeString().split(' ')[0];
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// Get day of week
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const days = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
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const day = days[now.getDay()];
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// Get timezone information
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const timezone = Intl.DateTimeFormat().resolvedOptions().timeZone;
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const timezoneOffset = now.getTimezoneOffset();
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const timezoneOffsetHours = Math.abs(Math.floor(timezoneOffset / 60));
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const timezoneOffsetMinutes = Math.abs(timezoneOffset % 60);
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const timezoneOffsetFormatted =
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(timezoneOffset <= 0 ? '+' : '-') +
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timezoneOffsetHours.toString().padStart(2, '0') + ':' +
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timezoneOffsetMinutes.toString().padStart(2, '0');
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return {
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date,
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time,
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day,
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timezone,
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timezoneOffset: timezoneOffsetFormatted,
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iso8601: now.toISOString(),
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unix_timestamp: Math.floor(now.getTime() / 1000)
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};
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`
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class CurrentDateTime_Tools implements INode {
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label: string
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name: string
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version: number
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description: string
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type: string
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icon: string
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category: string
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baseClasses: string[]
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constructor() {
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this.label = 'CurrentDateTime'
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this.name = 'currentDateTime'
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this.version = 1.0
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this.type = 'CurrentDateTime'
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this.icon = 'currentDateTime.svg'
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this.category = 'Tools'
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this.description = 'Get todays day, date and time.'
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this.baseClasses = [this.type, 'Tool']
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}
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async init(): Promise<any> {
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const obj = {
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name: 'current_date_time',
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description: 'Useful to get current day, date and time.',
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schema: z.object({}),
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code: code
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}
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let dynamicStructuredTool = new DynamicStructuredTool(obj)
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return dynamicStructuredTool
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}
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}
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module.exports = { nodeClass: CurrentDateTime_Tools }

‎packages/components/nodes/tools/CurrentDateTime/currentDateTime.svg

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‎packages/components/nodes/tools/MCP/BraveSearch/BraveSearchMCP.ts

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import { Tool } from '@langchain/core/tools'
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import { ICommonObject, INode, INodeData, INodeOptionsValue, INodeParams } from '../../../../src/Interface'
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import { getCredentialData, getCredentialParam, getNodeModulesPackagePath } from '../../../../src/utils'
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import { MCPToolkit } from '../core'
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class BraveSearch_MCP implements INode {
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label: string
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name: string
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version: number
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description: string
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type: string
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icon: string
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category: string
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baseClasses: string[]
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documentation: string
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credential: INodeParams
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inputs: INodeParams[]
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constructor() {
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this.label = 'Brave Search MCP'
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this.name = 'braveSearchMCP'
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this.version = 1.0
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this.type = 'BraveSearch MCP Tool'
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this.icon = 'brave.svg'
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this.category = 'Tools (MCP)'
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this.description = 'MCP server that integrates the Brave Search API - a real-time API to access web search capabilities'
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this.documentation = 'https://github.com/modelcontextprotocol/servers/tree/main/src/brave-search'
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this.credential = {
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label: 'Connect Credential',
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name: 'credential',
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type: 'credential',
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credentialNames: ['braveSearchApi']
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}
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this.inputs = [
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{
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label: 'Available Actions',
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name: 'mcpActions',
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type: 'asyncMultiOptions',
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loadMethod: 'listActions',
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refresh: true
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}
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]
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this.baseClasses = ['Tool']
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}
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//@ts-ignore
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loadMethods = {
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listActions: async (nodeData: INodeData, options: ICommonObject): Promise<INodeOptionsValue[]> => {
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try {
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const toolset = await this.getTools(nodeData, options)
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toolset.sort((a: any, b: any) => a.name.localeCompare(b.name))
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return toolset.map(({ name, ...rest }) => ({
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label: name.toUpperCase(),
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name: name,
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description: rest.description || name
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}))
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} catch (error) {
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return [
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{
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label: 'No Available Actions',
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name: 'error',
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description: 'No available actions, please check your API key and refresh'
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}
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]
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}
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}
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}
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async init(nodeData: INodeData, _: string, options: ICommonObject): Promise<any> {
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const tools = await this.getTools(nodeData, options)
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const _mcpActions = nodeData.inputs?.mcpActions
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let mcpActions = []
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if (_mcpActions) {
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try {
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mcpActions = typeof _mcpActions === 'string' ? JSON.parse(_mcpActions) : _mcpActions
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} catch (error) {
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console.error('Error parsing mcp actions:', error)
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}
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}
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return tools.filter((tool: any) => mcpActions.includes(tool.name))
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}
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async getTools(nodeData: INodeData, options: ICommonObject): Promise<Tool[]> {
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const credentialData = await getCredentialData(nodeData.credential ?? '', options)
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const braveApiKey = getCredentialParam('braveApiKey', credentialData, nodeData)
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const packagePath = getNodeModulesPackagePath('@modelcontextprotocol/server-brave-search/dist/index.js')
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const serverParams = {
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command: 'node',
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args: [packagePath],
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env: {
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BRAVE_API_KEY: braveApiKey
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}
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}
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const toolkit = new MCPToolkit(serverParams, 'stdio')
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await toolkit.initialize()
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const tools = toolkit.tools ?? []
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return tools as Tool[]
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}
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}
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module.exports = { nodeClass: BraveSearch_MCP }

‎packages/components/nodes/tools/MCP/BraveSearch/brave.svg

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‎packages/components/nodes/tools/MCP/Github/GithubMCP.ts

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import { Tool } from '@langchain/core/tools'
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import { ICommonObject, INode, INodeData, INodeOptionsValue, INodeParams } from '../../../../src/Interface'
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import { getCredentialData, getCredentialParam, getNodeModulesPackagePath } from '../../../../src/utils'
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import { MCPToolkit } from '../core'
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class Github_MCP implements INode {
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label: string
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name: string
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version: number
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description: string
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type: string
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icon: string
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category: string
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baseClasses: string[]
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documentation: string
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credential: INodeParams
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inputs: INodeParams[]
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constructor() {
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this.label = 'Github MCP'
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this.name = 'githubMCP'
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this.version = 1.0
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this.type = 'Github MCP Tool'
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this.icon = 'github.svg'
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this.category = 'Tools (MCP)'
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this.description = 'MCP Server for the GitHub API'
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this.documentation = 'https://github.com/modelcontextprotocol/servers/tree/main/src/github'
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this.credential = {
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label: 'Connect Credential',
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name: 'credential',
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type: 'credential',
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credentialNames: ['githubApi']
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}
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this.inputs = [
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{
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label: 'Available Actions',
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name: 'mcpActions',
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type: 'asyncMultiOptions',
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loadMethod: 'listActions',
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refresh: true
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}
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]
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this.baseClasses = ['Tool']
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}
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//@ts-ignore
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loadMethods = {
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listActions: async (nodeData: INodeData, options: ICommonObject): Promise<INodeOptionsValue[]> => {
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try {
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const toolset = await this.getTools(nodeData, options)
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toolset.sort((a: any, b: any) => a.name.localeCompare(b.name))
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return toolset.map(({ name, ...rest }) => ({
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label: name.toUpperCase(),
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name: name,
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description: rest.description || name
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}))
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} catch (error) {
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console.error('Error listing actions:', error)
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return [
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{
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label: 'No Available Actions',
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name: 'error',
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description: 'No available actions, please check your Github Access Token and refresh'
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}
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]
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}
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}
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}
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async init(nodeData: INodeData, _: string, options: ICommonObject): Promise<any> {
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const tools = await this.getTools(nodeData, options)
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const _mcpActions = nodeData.inputs?.mcpActions
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let mcpActions = []
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if (_mcpActions) {
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try {
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mcpActions = typeof _mcpActions === 'string' ? JSON.parse(_mcpActions) : _mcpActions
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} catch (error) {
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console.error('Error parsing mcp actions:', error)
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}
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}
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return tools.filter((tool: any) => mcpActions.includes(tool.name))
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}
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async getTools(nodeData: INodeData, options: ICommonObject): Promise<Tool[]> {
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const credentialData = await getCredentialData(nodeData.credential ?? '', options)
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const accessToken = getCredentialParam('accessToken', credentialData, nodeData)
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if (!accessToken) {
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throw new Error('Missing Github Access Token')
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}
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const packagePath = getNodeModulesPackagePath('@modelcontextprotocol/server-github/dist/index.js')
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const serverParams = {
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command: 'node',
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args: [packagePath],
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env: {
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GITHUB_PERSONAL_ACCESS_TOKEN: accessToken
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}
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}
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const toolkit = new MCPToolkit(serverParams, 'stdio')
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await toolkit.initialize()
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const tools = toolkit.tools ?? []
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return tools as Tool[]
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}
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}
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module.exports = { nodeClass: Github_MCP }

‎packages/components/nodes/tools/MCP/Github/github.svg

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