Feature/MCP (Model Context Protocol)

packages/components/credentials/PostgresUrl.credential.ts

@@ -0,0 +1,25 @@
+import { INodeParams, INodeCredential } from '../src/Interface'
+
+class PostgresUrl implements INodeCredential {
+    label: string
+    name: string
+    version: number
+    description: string
+    inputs: INodeParams[]
+
+    constructor() {
+        this.label = 'Postgres URL'
+        this.name = 'PostgresUrl'
+        this.version = 1.0
+        this.inputs = [
+            {
+                label: 'Postgres URL',
+                name: 'postgresUrl',
+                type: 'string',
+                placeholder: 'postgresql://localhost/mydb'
+            }
+        ]
+    }
+}
+
+module.exports = { credClass: PostgresUrl }

packages/components/credentials/SlackApi.credential.ts

@@ -0,0 +1,32 @@
+import { INodeParams, INodeCredential } from '../src/Interface'
+
+class SlackApi implements INodeCredential {
+    label: string
+    name: string
+    version: number
+    description: string
+    inputs: INodeParams[]
+
+    constructor() {
+        this.label = 'Slack API'
+        this.name = 'slackApi'
+        this.version = 1.0
+        this.description =
+            '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'
+        this.inputs = [
+            {
+                label: 'Bot Token',
+                name: 'botToken',
+                type: 'password'
+            },
+            {
+                label: 'Team ID',
+                name: 'teamId',
+                type: 'string',
+                placeholder: '<SLACK_TEAM_ID>'
+            }
+        ]
+    }
+}
+
+module.exports = { credClass: SlackApi }

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

@@ -0,0 +1,74 @@
+import { z } from 'zod'
+import { INode } from '../../../src/Interface'
+import { DynamicStructuredTool } from '../CustomTool/core'
+
+const code = `
+const now = new Date();
+
+// Format date as YYYY-MM-DD
+const date = now.toISOString().split('T')[0];
+
+// Get time in HH:MM:SS format
+const time = now.toTimeString().split(' ')[0];
+
+// Get day of week
+const days = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
+const day = days[now.getDay()];
+
+// Get timezone information
+const timezone = Intl.DateTimeFormat().resolvedOptions().timeZone;
+const timezoneOffset = now.getTimezoneOffset();
+const timezoneOffsetHours = Math.abs(Math.floor(timezoneOffset / 60));
+const timezoneOffsetMinutes = Math.abs(timezoneOffset % 60);
+const timezoneOffsetFormatted = 
+    (timezoneOffset <= 0 ? '+' : '-') + 
+    timezoneOffsetHours.toString().padStart(2, '0') + ':' + 
+    timezoneOffsetMinutes.toString().padStart(2, '0');
+
+return {
+    date,
+    time,
+    day,
+    timezone,
+    timezoneOffset: timezoneOffsetFormatted,
+    iso8601: now.toISOString(),
+    unix_timestamp: Math.floor(now.getTime() / 1000)
+};
+`
+
+class CurrentDateTime_Tools implements INode {
+    label: string
+    name: string
+    version: number
+    description: string
+    type: string
+    icon: string
+    category: string
+    baseClasses: string[]
+
+    constructor() {
+        this.label = 'CurrentDateTime'
+        this.name = 'currentDateTime'
+        this.version = 1.0
+        this.type = 'CurrentDateTime'
+        this.icon = 'currentDateTime.svg'
+        this.category = 'Tools'
+        this.description = 'Get todays day, date and time.'
+        this.baseClasses = [this.type, 'Tool']
+    }
+
+    async init(): Promise<any> {
+        const obj = {
+            name: 'current_date_time',
+            description: 'Useful to get current day, date and time.',
+            schema: z.object({}),
+            code: code
+        }
+
+        let dynamicStructuredTool = new DynamicStructuredTool(obj)
+
+        return dynamicStructuredTool
+    }
+}
+
+module.exports = { nodeClass: CurrentDateTime_Tools }

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

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

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

@@ -0,0 +1,114 @@
+import { Tool } from '@langchain/core/tools'
+import { ICommonObject, INode, INodeData, INodeOptionsValue, INodeParams } from '../../../../src/Interface'
+import { getCredentialData, getCredentialParam, getNodeModulesPackagePath } from '../../../../src/utils'
+import { MCPToolkit } from '../core'
+
+class Github_MCP implements INode {
+    label: string
+    name: string
+    version: number
+    description: string
+    type: string
+    icon: string
+    category: string
+    baseClasses: string[]
+    documentation: string
+    credential: INodeParams
+    inputs: INodeParams[]
+
+    constructor() {
+        this.label = 'Github MCP'
+        this.name = 'githubMCP'
+        this.version = 1.0
+        this.type = 'Github MCP Tool'
+        this.icon = 'github.svg'
+        this.category = 'Tools (MCP)'
+        this.description = 'MCP Server for the GitHub API'
+        this.documentation = 'https://github.com/modelcontextprotocol/servers/tree/main/src/github'
+        this.credential = {
+            label: 'Connect Credential',
+            name: 'credential',
+            type: 'credential',
+            credentialNames: ['githubApi']
+        }
+        this.inputs = [
+            {
+                label: 'Available Actions',
+                name: 'mcpActions',
+                type: 'asyncMultiOptions',
+                loadMethod: 'listActions',
+                refresh: true
+            }
+        ]
+        this.baseClasses = ['Tool']
+    }
+
+    //@ts-ignore
+    loadMethods = {
+        listActions: async (nodeData: INodeData, options: ICommonObject): Promise<INodeOptionsValue[]> => {
+            try {
+                const toolset = await this.getTools(nodeData, options)
+                toolset.sort((a: any, b: any) => a.name.localeCompare(b.name))
+
+                return toolset.map(({ name, ...rest }) => ({
+                    label: name.toUpperCase(),
+                    name: name,
+                    description: rest.description || name
+                }))
+            } catch (error) {
+                console.error('Error listing actions:', error)
+                return [
+                    {
+                        label: 'No Available Actions',
+                        name: 'error',
+                        description: 'No available actions, please check your Github Access Token and refresh'
+                    }
+                ]
+            }
+        }
+    }
+
+    async init(nodeData: INodeData, _: string, options: ICommonObject): Promise<any> {
+        const tools = await this.getTools(nodeData, options)
+
+        const _mcpActions = nodeData.inputs?.mcpActions
+        let mcpActions = []
+        if (_mcpActions) {
+            try {
+                mcpActions = typeof _mcpActions === 'string' ? JSON.parse(_mcpActions) : _mcpActions
+            } catch (error) {
+                console.error('Error parsing mcp actions:', error)
+            }
+        }
+
+        return tools.filter((tool: any) => mcpActions.includes(tool.name))
+    }
+
+    async getTools(nodeData: INodeData, options: ICommonObject): Promise<Tool[]> {
+        const credentialData = await getCredentialData(nodeData.credential ?? '', options)
+        const accessToken = getCredentialParam('accessToken', credentialData, nodeData)
+
+        if (!accessToken) {
+            throw new Error('Missing Github Access Token')
+        }
+
+        const packagePath = getNodeModulesPackagePath('@modelcontextprotocol/server-github/dist/index.js')
+
+        const serverParams = {
+            command: 'node',
+            args: [packagePath],
+            env: {
+                GITHUB_PERSONAL_ACCESS_TOKEN: accessToken
+            }
+        }
+
+        const toolkit = new MCPToolkit(serverParams, 'stdio')
+        await toolkit.initialize()
+
+        const tools = toolkit.tools ?? []
+
+        return tools as Tool[]
+    }
+}
+
+module.exports = { nodeClass: Github_MCP }