# How to integrate Parallel MCP with LangChain ```json { "title": "How to integrate Parallel MCP with LangChain", "toolkit": "Parallel", "toolkit_slug": "parallel", "framework": "LangChain", "framework_slug": "langchain", "url": "https://composio.dev/toolkits/parallel/framework/langchain", "markdown_url": "https://composio.dev/toolkits/parallel/framework/langchain.md", "updated_at": "2026-05-12T10:21:17.787Z" } ``` ## Introduction This guide walks you through connecting Parallel to LangChain using the Composio tool router. By the end, you'll have a working Parallel agent that can find top articles on generative ai trends, summarize recent news about electric vehicles, batch search for competitors' product launches through natural language commands. This guide will help you understand how to give your LangChain agent real control over a Parallel account through Composio's Parallel MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved. ## Also integrate Parallel with - [OpenAI Agents SDK](https://composio.dev/toolkits/parallel/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/parallel/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/parallel/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/parallel/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/parallel/framework/codex) - [OpenClaw](https://composio.dev/toolkits/parallel/framework/openclaw) - [Hermes](https://composio.dev/toolkits/parallel/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/parallel/framework/cli) - [Google ADK](https://composio.dev/toolkits/parallel/framework/google-adk) - [Vercel AI SDK](https://composio.dev/toolkits/parallel/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/parallel/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/parallel/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/parallel/framework/crew-ai) ## TL;DR Here's what you'll learn: - Get and set up your OpenAI and Composio API keys - Connect your Parallel project to Composio - Create a Tool Router MCP session for Parallel - Initialize an MCP client and retrieve Parallel tools - Build a LangChain agent that can interact with Parallel - Set up an interactive chat interface for testing ## What is LangChain? LangChain is a framework for developing applications powered by language models. It provides tools and abstractions for building agents that can reason, use tools, and maintain conversation context. Key features include: - Agent Framework: Build agents that can use tools and make decisions - MCP Integration: Connect to external services through Model Context Protocol adapters - Memory Management: Maintain conversation history across interactions - Multi-Provider Support: Works with OpenAI, Anthropic, and other LLM providers ## What is the Parallel MCP server, and what's possible with it? The Parallel MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Parallel account. It provides structured and secure access to advanced web research automation, so your agent can perform actions like launching batch research tasks, running semantic searches, monitoring task progress, and generating research suggestions on your behalf. - Automated web research task creation: Instantly create structured research tasks or batch multiple queries for parallel execution, saving time and effort. - Semantic search across multiple topics: Direct your agent to run parallel semantic searches and retrieve top-matching documents or data for several queries at once. - Real-time task group monitoring: Let your agent stream live updates about the progress, completion, or status of ongoing research task groups. - Context-driven research suggestions: Have the agent suggest the next best research tasks based on your project or intent, keeping your workflow efficient and on track. - Task group retrieval and management: Fetch detailed information about specific research task groups to review results or track progress seamlessly. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `PARALLEL_ADD_ENRICHMENT_TO_FIND_ALL_RUN` | Add Enrichment to FindAll Run | Tool to add an enrichment to a FindAll run. Use when you need to enrich existing FindAll run results with additional structured data fields. Enrichments define what information to extract from matched entities using a JSON schema. | | `PARALLEL_ADD_RUNS_TO_TASK_GROUP` | Add Runs to Task Group | Tool to initiate multiple task runs within a TaskGroup. Use when you need to execute multiple tasks in parallel within an existing task group. | | `PARALLEL_CANCEL_FIND_ALL_RUN` | Cancel FindAll Run | Tool to cancel an active FindAll run by findall_id. Use when you need to stop a running FindAll operation before it completes. Cannot cancel runs that have already terminated. | | `PARALLEL_CREATE_CHAT_COMPLETIONS` | Create Chat Completions | Tool to get realtime chat completions from Parallel AI. Use when you need conversational AI responses or structured outputs via chat interface. Can be combined with Task API processors for research-grade structured outputs with citations and reasoning. | | `PARALLEL_CREATE_MONITOR` | Create Monitor | Tool to create a web monitor that periodically runs the specified query. The monitor runs once at creation and then continues according to the specified cadence (hourly, daily, weekly, or every two weeks). Use when you need to track changes or developments for a specific search query over time. | | `PARALLEL_CREATE_TASK_GROUP` | Create Task Group | Tool to create a new task group. Use when batching multiple tasks for parallel execution. Task Groups enable grouping and tracking of multiple task runs within a single manageable unit. | | `PARALLEL_CREATE_TASK_RUN` | Create Task Run | Tool to create and initiate a task run. Returns immediately with a run object in status 'queued'. Use when you need to execute tasks asynchronously with Parallel AI processors. | | `PARALLEL_DELETE_MONITOR` | Delete Monitor | Tool to delete a monitor, stopping all future executions. Use when you need to permanently remove a monitor. Deleted monitors can no longer be updated or retrieved. | | `PARALLEL_EXTEND_FIND_ALL_RUN` | Extend FindAll Run | Tool to extend a FindAll run by adding additional matches to the current match limit. Use when you need to increase the number of matches for an existing FindAll run that is still active or has completed. | | `PARALLEL_EXTRACT` | Extract Content from URLs | Tool to extract relevant content from specific web URLs. Use when you need to fetch and extract content from known URLs with optional focusing on specific objectives or search queries. | | `PARALLEL_FETCH_TASK_GROUP_RUNS` | Fetch Task Group Runs | Tool to retrieve task runs from a Task Group as a resumable stream. Use when you need to fetch all runs within a group, optionally including their inputs and outputs. The stream can be resumed using the event_id as a cursor. | | `PARALLEL_FIND_ALL` | Start FindAll Run | Tool to start a FindAll run. Use when you need to discover and match entities based on natural-language objectives. Supports custom conditions, exclusion lists, and webhook callbacks. | | `PARALLEL_GET_FIND_ALL_RUN_RESULT` | Get FindAll Run Result | Tool to fetch the final (or latest available) FindAll candidates and result payload for a run. Use when you need to retrieve matched/unmatched candidates after a FindAll run has progressed or completed. | | `PARALLEL_GET_FIND_ALL_RUN_SCHEMA` | Get FindAll Run Schema | Tool to retrieve the schema configuration of a FindAll run by findall_id. Use when you need to inspect the objective, entity type, match conditions, and other schema details for a previously created FindAll run. | | `PARALLEL_INGEST_FIND_ALL_RUN` | Ingest FindAll Run | Tool to transform a natural language search objective into a structured FindAll specification. Use when you need to generate a FindAll run spec from a user's natural language description. The generated specification serves as a suggested starting point and can be further customized. | | `PARALLEL_LIST_MONITOR_EVENTS` | List Monitor Events | Tool to list events for a monitor from up to the last 300 event groups. Retrieves events including errors and material changes in reverse chronological order. | | `PARALLEL_LIST_MONITORS` | List Monitors | Tool to list active monitors for the user. Returns all monitors regardless of status with their configuration and current state. Supports cursor-based pagination using monitor_id and limit parameters. | | `PARALLEL_RETRIEVE_EVENT_GROUP` | Retrieve Event Group | Tool to retrieve an event group for a monitor. Use when you have a valid monitor ID and event group ID and want to view the execution history. | | `PARALLEL_RETRIEVE_FIND_ALL_RUN_STATUS` | Retrieve FindAll Run Status | Tool to retrieve status and metadata for a FindAll run by findall_id. Use when you need to poll or check the progress of a FindAll run that was previously created. | | `PARALLEL_RETRIEVE_MONITOR` | Retrieve Monitor | Tool to retrieve a specific monitor by ID. Returns the monitor configuration including status, cadence, query, and webhook settings. | | `PARALLEL_RETRIEVE_TASK_GROUP` | Retrieve Task Group | Tool to retrieve details of a specific task group. Use when you have a valid task group ID and want to view its details. | | `PARALLEL_RETRIEVE_TASK_GROUP_RUN` | Retrieve Task Group Run | Tool to retrieve run status by run_id for a task group. Use when you need to check the status of a specific task group run or poll for completion. | | `PARALLEL_RETRIEVE_TASK_RUN` | Retrieve Task Run | Tool to retrieve run status by run_id. Use when you need to check the status or details of a specific task run. The run result is available from the /result endpoint. | | `PARALLEL_RETRIEVE_TASK_RUN_INPUT` | Retrieve Task Run Input | Tool to retrieve the input data of a specific task run by run_id. Use when you need to view the original input parameters that were provided to a task run. | | `PARALLEL_RETRIEVE_TASK_RUN_RESULT` | Retrieve Task Run Result | Tool to retrieve the result of a task run by run_id, blocking until the run completes. Use when you need to wait for and fetch the final output of a previously initiated task run. The request will block until the run completes or the timeout is reached. | | `PARALLEL_PARALLEL_SEARCH` | Parallel Search | Tool to perform parallel semantic search. Use when you need to retrieve top matching documents for multiple queries in a single call. | | `PARALLEL_SIMULATE_EVENT` | Simulate Event | Tool to simulate sending an event for a monitor. Use when testing monitor webhooks or validating monitor configurations. Simulates sending an event of the specified type (defaults to monitor.event.detected). | | `PARALLEL_STREAM_FIND_ALL_EVENTS` | Stream FindAll Events | Tool to stream events from a FindAll run. Use when you need real-time updates on candidate discovery, matching progress, and run status. | | `PARALLEL_STREAM_TASK_GROUP_EVENTS` | Stream Task Group Events | Tool to stream events for a Task Group. Use when you want real-time updates of group status and run completions. | | `PARALLEL_STREAM_TASK_RUN_EVENTS` | Stream Task Run Events | Tool to stream events for a Task Run. Returns progress updates and state changes for the task run. For runs without enable_events=true, event frequency is reduced. | | `PARALLEL_SUGGEST_TASK` | Suggest Task | Tool to suggest tasks based on user intent. Use when you need task specifications generated from a natural language description of what you want to accomplish. | | `PARALLEL_UPDATE_MONITOR` | Update Monitor | Tool to update a monitor's configuration. Use when you need to modify an existing monitor's cadence, query, metadata, or webhook settings. At least one field must be non-null to apply an update. | ## Supported Triggers None listed. ## Creating MCP Server - Stand-alone vs Composio SDK The Parallel MCP server is an implementation of the Model Context Protocol that connects your AI agent to Parallel. It provides structured and secure access so your agent can perform Parallel operations on your behalf through a secure, permission-based interface. With Composio's managed implementation, you don't have to create your own developer app. For production, if you're building an end product, we recommend using your own credentials. The managed server helps you prototype fast and go from 0-1 faster. ## Step-by-step Guide ### 1. Prerequisites No description provided. ### 1. Getting API Keys for OpenAI and Composio OpenAI API Key - Go to the [OpenAI dashboard](https://platform.openai.com/settings/organization/api-keys) and create an API key. You'll need credits to use the models, or you can connect to another model provider. - Keep the API key safe. Composio API Key - Log in to the [Composio dashboard](https://dashboard.composio.dev?utm_source=toolkits&utm_medium=framework_docs). - Navigate to your API settings and generate a new API key. - Store this key securely as you'll need it for authentication. ### 2. Install dependencies No description provided. ```python pip install composio-langchain langchain-mcp-adapters langchain python-dotenv ``` ```typescript npm install @composio/langchain @langchain/core @langchain/openai @langchain/mcp-adapters dotenv ``` ### 3. Set up environment variables Create a .env file in your project root. What's happening: - COMPOSIO_API_KEY authenticates your requests to Composio's API - COMPOSIO_USER_ID identifies the user for session management - OPENAI_API_KEY enables access to OpenAI's language models ```bash COMPOSIO_API_KEY=your_composio_api_key_here COMPOSIO_USER_ID=your_composio_user_id_here OPENAI_API_KEY=your_openai_api_key_here ``` ### 4. Import dependencies No description provided. ```python from langchain_mcp_adapters.client import MultiServerMCPClient from langchain.agents import create_agent from dotenv import load_dotenv from composio import Composio import asyncio import os load_dotenv() ``` ```typescript import { Composio } from '@composio/core'; import { LangchainProvider } from '@composio/langchain'; import { MultiServerMCPClient } from "@langchain/mcp-adapters"; import { createAgent } from "langchain"; import * as readline from 'readline'; import 'dotenv/config'; dotenv.config(); ``` ### 5. Initialize Composio client What's happening: - We're loading the COMPOSIO_API_KEY from environment variables and validating it exists - Creating a Composio instance that will manage our connection to Parallel tools - Validating that COMPOSIO_USER_ID is also set before proceeding ```python async def main(): composio = Composio(api_key=os.getenv("COMPOSIO_API_KEY")) if not os.getenv("COMPOSIO_API_KEY"): raise ValueError("COMPOSIO_API_KEY is not set") if not os.getenv("COMPOSIO_USER_ID"): raise ValueError("COMPOSIO_USER_ID is not set") ``` ```typescript const composioApiKey = process.env.COMPOSIO_API_KEY; const userId = process.env.COMPOSIO_USER_ID; if (!composioApiKey) throw new Error('COMPOSIO_API_KEY is not set'); if (!userId) throw new Error('COMPOSIO_USER_ID is not set'); async function main() { const composio = new Composio({ apiKey: composioApiKey as string, provider: new LangchainProvider() }); ``` ### 6. Create a Tool Router session What's happening: - We're creating a Tool Router session that gives your agent access to Parallel tools - The create method takes the user ID and specifies which toolkits should be available - The returned session.mcp.url is the MCP server URL that your agent will use - This approach allows the agent to dynamically load and use Parallel tools as needed ```python # Create Tool Router session for Parallel session = composio.create( user_id=os.getenv("COMPOSIO_USER_ID"), toolkits=['parallel'] ) url = session.mcp.url ``` ```typescript const session = await composio.create( userId as string, { toolkits: ['parallel'] } ); const url = session.mcp.url; ``` ### 7. Configure the agent with the MCP URL No description provided. ```python client = MultiServerMCPClient({ "parallel-agent": { "transport": "streamable_http", "url": session.mcp.url, "headers": { "x-api-key": os.getenv("COMPOSIO_API_KEY") } } }) tools = await client.get_tools() agent = create_agent("gpt-5", tools) ``` ```typescript const client = new MultiServerMCPClient({ "parallel-agent": { transport: "http", url: url, headers: { "x-api-key": process.env.COMPOSIO_API_KEY } } }); const tools = await client.getTools(); const agent = createAgent({ model: "gpt-5", tools }); ``` ### 8. Set up interactive chat interface No description provided. ```python conversation_history = [] print("Chat started! Type 'exit' or 'quit' to end the conversation.\n") print("Ask any Parallel related question or task to the agent.\n") while True: user_input = input("You: ").strip() if user_input.lower() in ['exit', 'quit', 'bye']: print("\nGoodbye!") break if not user_input: continue conversation_history.append({"role": "user", "content": user_input}) print("\nAgent is thinking...\n") response = await agent.ainvoke({"messages": conversation_history}) conversation_history = response['messages'] final_response = response['messages'][-1].content print(f"Agent: {final_response}\n") ``` ```typescript let conversationHistory: any[] = []; console.log("Chat started! Type 'exit' or 'quit' to end the conversation.\n"); console.log("Ask any Parallel related question or task to the agent.\n"); const rl = readline.createInterface({ input: process.stdin, output: process.stdout, prompt: 'You: ' }); rl.prompt(); rl.on('line', async (userInput: string) => { const trimmedInput = userInput.trim(); if (['exit', 'quit', 'bye'].includes(trimmedInput.toLowerCase())) { console.log("\nGoodbye!"); rl.close(); process.exit(0); } if (!trimmedInput) { rl.prompt(); return; } conversationHistory.push({ role: "user", content: trimmedInput }); console.log("\nAgent is thinking...\n"); const response = await agent.invoke({ messages: conversationHistory }); conversationHistory = response.messages; const finalResponse = response.messages[response.messages.length - 1]?.content; console.log(`Agent: ${finalResponse}\n`); rl.prompt(); }); rl.on('close', () => { console.log('\n👋 Session ended.'); process.exit(0); }); ``` ### 9. Run the application No description provided. ```python if __name__ == "__main__": asyncio.run(main()) ``` ```typescript main().catch((err) => { console.error('Fatal error:', err); process.exit(1); }); ``` ## Complete Code ```python from langchain_mcp_adapters.client import MultiServerMCPClient from langchain.agents import create_agent from dotenv import load_dotenv from composio import Composio import asyncio import os load_dotenv() async def main(): composio = Composio(api_key=os.getenv("COMPOSIO_API_KEY")) if not os.getenv("COMPOSIO_API_KEY"): raise ValueError("COMPOSIO_API_KEY is not set") if not os.getenv("COMPOSIO_USER_ID"): raise ValueError("COMPOSIO_USER_ID is not set") session = composio.create( user_id=os.getenv("COMPOSIO_USER_ID"), toolkits=['parallel'] ) url = session.mcp.url client = MultiServerMCPClient({ "parallel-agent": { "transport": "streamable_http", "url": url, "headers": { "x-api-key": os.getenv("COMPOSIO_API_KEY") } } }) tools = await client.get_tools() agent = create_agent("gpt-5", tools) conversation_history = [] print("Chat started! Type 'exit' or 'quit' to end the conversation.\n") print("Ask any Parallel related question or task to the agent.\n") while True: user_input = input("You: ").strip() if user_input.lower() in ['exit', 'quit', 'bye']: print("\nGoodbye!") break if not user_input: continue conversation_history.append({"role": "user", "content": user_input}) print("\nAgent is thinking...\n") response = await agent.ainvoke({"messages": conversation_history}) conversation_history = response['messages'] final_response = response['messages'][-1].content print(f"Agent: {final_response}\n") if __name__ == "__main__": asyncio.run(main()) ``` ```typescript import { Composio } from '@composio/core'; import { LangchainProvider } from '@composio/langchain'; import { MultiServerMCPClient } from "@langchain/mcp-adapters"; import { createAgent } from "langchain"; import * as readline from 'readline'; import 'dotenv/config'; const composioApiKey = process.env.COMPOSIO_API_KEY; const userId = process.env.COMPOSIO_USER_ID; if (!composioApiKey) throw new Error('COMPOSIO_API_KEY is not set'); if (!userId) throw new Error('COMPOSIO_USER_ID is not set'); async function main() { const composio = new Composio({ apiKey: composioApiKey as string, provider: new LangchainProvider() }); const session = await composio.create( userId as string, { toolkits: ['parallel'] } ); const url = session.mcp.url; const client = new MultiServerMCPClient({ "parallel-agent": { transport: "http", url: url, headers: { "x-api-key": process.env.COMPOSIO_API_KEY } } }); const tools = await client.getTools(); const agent = createAgent({ model: "gpt-5", tools }); let conversationHistory: any[] = []; console.log("Chat started! Type 'exit' or 'quit' to end the conversation.\n"); console.log("Ask any Parallel related question or task to the agent.\n"); const rl = readline.createInterface({ input: process.stdin, output: process.stdout, prompt: 'You: ' }); rl.prompt(); rl.on('line', async (userInput: string) => { const trimmedInput = userInput.trim(); if (['exit', 'quit', 'bye'].includes(trimmedInput.toLowerCase())) { console.log("\nGoodbye!"); rl.close(); process.exit(0); } if (!trimmedInput) { rl.prompt(); return; } conversationHistory.push({ role: "user", content: trimmedInput }); console.log("\nAgent is thinking...\n"); const response = await agent.invoke({ messages: conversationHistory }); conversationHistory = response.messages; const finalResponse = response.messages[response.messages.length - 1]?.content; console.log(`Agent: ${finalResponse}\n`); rl.prompt(); }); rl.on('close', () => { console.log('\nSession ended.'); process.exit(0); }); } main().catch((err) => { console.error('Fatal error:', err); process.exit(1); }); ``` ## Conclusion You've successfully built a LangChain agent that can interact with Parallel through Composio's Tool Router. Key features of this implementation: - Dynamic tool loading through Composio's Tool Router - Conversation history maintenance for context-aware responses - Async Python provides clean, efficient execution of agent workflows You can extend this further by adding error handling, implementing specific business logic, or integrating additional Composio toolkits to create multi-app workflows. ## How to build Parallel MCP Agent with another framework - [OpenAI Agents SDK](https://composio.dev/toolkits/parallel/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/parallel/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/parallel/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/parallel/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/parallel/framework/codex) - [OpenClaw](https://composio.dev/toolkits/parallel/framework/openclaw) - [Hermes](https://composio.dev/toolkits/parallel/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/parallel/framework/cli) - [Google ADK](https://composio.dev/toolkits/parallel/framework/google-adk) - [Vercel AI SDK](https://composio.dev/toolkits/parallel/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/parallel/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/parallel/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/parallel/framework/crew-ai) ## Related Toolkits - [Excel](https://composio.dev/toolkits/excel) - Microsoft Excel is a robust spreadsheet application for organizing, analyzing, and visualizing data. 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Gain actionable insights into analytics, hosting, and content management stacks for smarter research and lead generation. - [Byteforms](https://composio.dev/toolkits/byteforms) - Byteforms is an all-in-one platform for creating forms, managing submissions, and integrating data. It streamlines workflows by centralizing form data collection and automation. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Parallel MCP? With a standalone Parallel MCP server, the agents and LLMs can only access a fixed set of Parallel tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Parallel and many other apps based on the task at hand, all through a single MCP endpoint. ### Can I use Tool Router MCP with LangChain? Yes, you can. LangChain fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Parallel tools. ### Can I manage the permissions and scopes for Parallel while using Tool Router? Yes, absolutely. You can configure which Parallel scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do. ### How safe is my data with Composio Tool Router? All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Parallel data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)