How to integrate Faraday MCP with LangChain

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Introduction

This guide walks you through connecting Faraday to LangChain using the Composio tool router. By the end, you'll have a working Faraday agent that can enrich salesforce leads with predictive insights, automate email categorization using faraday ai, trigger customer follow-up based on faraday scores through natural language commands.

This guide will help you understand how to give your LangChain agent real control over a Faraday account through Composio's Faraday MCP server.

Before we dive in, let's take a quick look at the key ideas and tools involved.

TL;DR

Here's what you'll learn:
  • Get and set up your OpenAI and Composio API keys
  • Connect your Faraday project to Composio
  • Create a Tool Router MCP session for Faraday
  • Initialize an MCP client and retrieve Faraday tools
  • Build a LangChain agent that can interact with Faraday
  • 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 Faraday MCP server, and what's possible with it?

The Faraday MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Faraday account. It provides structured and secure access so your agent can perform Faraday operations on your behalf.

Supported Tools & Triggers

Tools
Archive CohortTool to archive a cohort in Faraday.
Archive ConnectionTool to archive a connection in Faraday.
Archive DatasetTool to archive a dataset in Faraday.
Archive OutcomeTool to archive an outcome in Faraday.
Archive Persona SetTool to archive a persona set in Faraday.
Archive PlaceTool to archive a place in Faraday.
Archive ScopeTool to archive a scope in Faraday.
Archive StreamTool to archive a stream in Faraday.
Archive TargetTool to archive a target in Faraday.
Archive TraitTool to archive a trait in Faraday.
Create AccountTool to create a new Faraday account with specified name and branding.
Create CohortsTool to create a new cohort in Faraday.
Create DatasetTool to create a new dataset in Faraday.
Create OutcomeTool to create a new outcome.
Create Persona SetTool to create a new persona set.
Create PlaceTool to create a new place in Faraday.
Create ScopeTool to create a new scope in Faraday.
Create StreamTool to create a new stream or find an existing stream by name.
Create Target PreviewTool to start a preview delivery for a target.
Create TargetTool to create a target in Faraday.
Create TraitTool to create a new trait in Faraday.
Create Webhook EndpointTool to create a new webhook endpoint.
Delete AccountTool to delete an account by its UUID.
Delete All Orphaned TraitsTool to delete all orphaned traits from Faraday.
Delete CohortTool to permanently delete a cohort from Faraday.
Delete ConnectionTool to delete a Faraday connection by its UUID.
Delete DatasetTool to delete a dataset from Faraday.
Delete OutcomeTool to delete an outcome by its UUID.
Delete Persona SetTool to delete a persona set.
Delete PlaceTool to delete a place by its UUID.
Delete ScopeTool to delete a scope by its UUID.
Delete StreamTool to delete a stream by its UUID or name.
Delete TargetTool to delete a target by its UUID.
Delete UploadPermanently deletes a file from a Faraday dataset directory.
Delete Webhook EndpointTool to delete a webhook endpoint by its UUID.
Force Update CohortTool to trigger a rerun for a cohort.
Force Update ConnectionTool to trigger a rerun for a Faraday connection.
Force Update DatasetTool to trigger a rerun for a dataset.
Force Update OutcomeTool to trigger a rerun for an outcome resource.
Force Update Persona SetTool to trigger a rerun for a persona set resource.
Force Update PlaceTool to trigger a rerun for a place.
Force Update ScopeTool to trigger a rerun for a scope resource.
Force Update StreamTool to trigger a rerun for a stream.
Force Update TargetTool to trigger a rerun for a target.
Force Update TraitTool to trigger a rerun for a trait.
Get AccountTool to retrieve detailed information about a Faraday account by its UUID.
List AccountsTool to list all Faraday accounts accessible by the current user.
Get Accounts BillingTool to get billing information about your account.
Get CohortTool to retrieve a specific cohort by ID.
Get Cohort Membership AnalysisTool to get cohort membership counts over time for a specific cohort.
List CohortsTool to list all cohorts in your Faraday account.
Get Connection DatasetsTool to retrieve all datasets that use a specific connection.
Get Connection TargetsTool to retrieve all targets that use a specific connection.
Get Current AccountTool to retrieve the current account information.
Get Current Account BillingTool to retrieve billing information about the current account.
Get DatasetTool to retrieve a dataset by its UUID.
Get Dataset Ingress LogsTool to retrieve dataset ingress metrics over time.
List Feature StoresTool to list all feature stores.
Get Dependency GraphTool to retrieve the complete dependency graph for all resources on an account.
Get Market Opportunity AnalysesTool to retrieve all market opportunity analyses from Faraday.
Get OutcomeTool to retrieve an outcome by its ID.
List OutcomesTool to list all outcomes for the account.
Get Persona SetTool to retrieve a persona set by its UUID.
Get Persona Set Analysis FlowTool to retrieve the flow of persona sets over time, showing how individuals move between different personas.
List Persona SetsTool to list all persona sets.
Get Persona Set Analysis DimensionsTool to get various trait breakdown information about a persona set.
Get PlaceTool to retrieve a specific place by its UUID.
List PlacesTool to list all places in Faraday.
List RecommendersTool to list all recommenders.
Get ScopeTool to retrieve detailed information about a Faraday scope by its UUID.
Get Scope AnalysisTool to get analysis for a scope including outcomes and recommenders with probability distributions.
Get Scope DatasetsTool to retrieve all datasets associated with a Faraday scope.
Get Scope EfficacyTool to retrieve efficacy metrics for a scope.
Get Scope Payload CohortsTool to get payload cohorts for a specific scope.
Get Scope Payload OutcomesTool to retrieve payload outcomes for a specific scope.
Get Scope Payload Persona SetsTool to get payload persona sets for a specific scope.
Get Scope Payload RecommendersTool to retrieve payload recommenders for a specific scope.
Get Scope Population Exclusion CohortsTool to get population exclusion cohorts for a scope.
Get Scope Population CohortsTool to get population cohorts for a specific scope.
Get Scope TargetsTool to get all targets for a specific scope.
Get StreamTool to retrieve a stream by its UUID or name.
List StreamsTool to list all streams in your Faraday account.
Get Streams AnalysisTool to get the count of stream events emitted over a time period.
Get TargetTool to retrieve a specific target by its UUID from Faraday.
Get Target AnalysisTool to retrieve a target's analysis including geographic distributions and trait breakdowns.
Get TraitTool to retrieve a specific trait by ID.
Get Trait Analysis DimensionsTool to retrieve the percentage of the US population that falls into each category of a trait.
Get Traits CSVTool to retrieve all user-defined and Faraday-provided traits in CSV format.
Get UploadTool to download a previously uploaded file from a Faraday dataset directory.
List Uploaded FilesTool to retrieve the list of previously uploaded files in Faraday.
Get UsagesTool to retrieve usage statistics for your Faraday account.
Get Webhook EndpointTool to retrieve a webhook endpoint by its UUID.
List Webhook EndpointsTool to list all webhook endpoints configured for the account.
List AttributesTool to list all attributes in the feature store.
List ConnectionsTool to list all connections configured in Faraday.
List ScopesTool to list all scopes.
List TargetsTool to list all targets in your Faraday account.
Unarchive CohortTool to unarchive a previously archived cohort.
Unarchive DatasetTool to unarchive a dataset in Faraday.
Unarchive OutcomeTool to unarchive an outcome in Faraday.
Unarchive Persona SetTool to unarchive a previously archived persona set.
Unarchive PlaceTool to unarchive a previously archived place.
Unarchive ScopeTool to unarchive a previously archived scope.
Unarchive StreamTool to unarchive a stream in Faraday.
Unarchive TraitTool to unarchive a trait.
Update AccountTool to update an account's name or branding settings.
Update CohortTool to update a cohort's configuration using JSON Merge Patch semantics.
Update ConnectionTool to update a Faraday connection's name or options.
Update DatasetTool to update a dataset configuration using JSON Merge Patch semantics.
Update OutcomeTool to update an outcome's configuration using JSON Merge Patch semantics.
Update Persona SetTool to edit a persona set's configuration using JSON Merge Patch.
Update PlaceTool to update a place's name, addresses, or geojson geometry.
Update ScopeTool to update a Faraday scope's configuration using JSON Merge Patch semantics.
Update StreamTool to update a stream's properties using JSON Merge Patch semantics.
Update TargetTool to update a target's configuration in Faraday.
Update TraitTool to update a trait's properties using JSON Merge Patch semantics.
Update Webhook EndpointTool to update a webhook endpoint's configuration.

What is the Composio tool router, and how does it fit here?

What is Tool Router?

Composio's Tool Router helps agents find the right tools for a task at runtime. You can plug in multiple toolkits (like Gmail, HubSpot, and GitHub), and the agent will identify the relevant app and action to complete multi-step workflows. This can reduce token usage and improve the reliability of tool calls. Read more here: Getting started with Tool Router

The tool router generates a secure MCP URL that your agents can access to perform actions.

How the Tool Router works

The Tool Router follows a three-phase workflow:

  1. Discovery: Searches for tools matching your task and returns relevant toolkits with their details.
  2. Authentication: Checks for active connections. If missing, creates an auth config and returns a connection URL via Auth Link.
  3. Execution: Executes the action using the authenticated connection.

Step-by-step Guide

Prerequisites

Before starting this tutorial, make sure you have:
  • Python 3.10 or higher installed on your system
  • A Composio account with an API key
  • An OpenAI API key
  • Basic familiarity with Python and async programming

Getting API Keys for OpenAI and Composio

OpenAI API Key
  • Go to the OpenAI dashboard 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.
  • Navigate to your API settings and generate a new API key.
  • Store this key securely as you'll need it for authentication.

Install dependencies

pip install composio-langchain langchain-mcp-adapters langchain python-dotenv

Install the required packages for LangChain with MCP support.

What's happening:

  • composio-langchain provides Composio integration for LangChain
  • langchain-mcp-adapters enables MCP client connections
  • langchain is the core agent framework
  • python-dotenv loads environment variables

Set up environment variables

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

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

Import dependencies

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()
What's happening:
  • We're importing LangChain's MCP adapter and Composio SDK
  • The dotenv import loads environment variables from your .env file
  • This setup prepares the foundation for connecting LangChain with Faraday functionality through MCP

Initialize Composio client

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")
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 Faraday tools
  • Validating that COMPOSIO_USER_ID is also set before proceeding

Create a Tool Router session

# Create Tool Router session for Faraday
session = composio.create(
    user_id=os.getenv("COMPOSIO_USER_ID"),
    toolkits=['faraday']
)

url = session.mcp.url
What's happening:
  • We're creating a Tool Router session that gives your agent access to Faraday 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 Faraday tools as needed

Configure the agent with the MCP URL

client = MultiServerMCPClient({
    "faraday-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)
What's happening:
  • We're creating a MultiServerMCPClient that connects to our Faraday MCP server via HTTP
  • The client is configured with a name and the URL from our Tool Router session
  • get_tools() retrieves all available Faraday tools that the agent can use
  • We're creating a LangChain agent using the GPT-5 model

Set up interactive chat interface

conversation_history = []

print("Chat started! Type 'exit' or 'quit' to end the conversation.\n")
print("Ask any Faraday 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")
What's happening:
  • We initialize an empty conversation_history list to maintain context across interactions
  • A while loop continuously accepts user input from the command line
  • When a user types a message, it's added to the conversation history and sent to the agent
  • The agent processes the request using the ainvoke() method with the full conversation history
  • Users can type 'exit', 'quit', or 'bye' to end the chat session gracefully

Run the application

if __name__ == "__main__":
    asyncio.run(main())
What's happening:
  • We call the main() function using asyncio.run() to start the application

Complete Code

Here's the complete code to get you started with Faraday and LangChain:

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=['faraday']
    )

    url = session.mcp.url
    
    client = MultiServerMCPClient({
        "faraday-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 Faraday 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())

Conclusion

You've successfully built a LangChain agent that can interact with Faraday 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 Faraday MCP Agent with another framework

OpenAI Agents SDK

OpenAI Agents SDK

Use Faraday MCP with OpenAI Agents SDK

Claude Agent SDK

Claude Agent SDK

Use Faraday MCP with Claude Agent SDK

Google ADK

Google ADK

Use Faraday MCP with Google ADK

Vercel AI SDK

Vercel AI SDK

Use Faraday MCP with Vercel AI SDK

Mastra AI

Mastra AI

Use Faraday MCP with Mastra AI

LlamaIndex

LlamaIndex

Use Faraday MCP with LlamaIndex

CrewAI

CrewAI

Use Faraday MCP with CrewAI

Claude Code

Claude Code

Use Faraday MCP with Claude Code

Codex

Codex

Use Faraday MCP with Codex

FAQ

What are the differences in Tool Router MCP and Faraday MCP?

With a standalone Faraday MCP server, the agents and LLMs can only access a fixed set of Faraday tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Faraday 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 Faraday tools.

Can I manage the permissions and scopes for Faraday while using Tool Router?

Yes, absolutely. You can configure which Faraday 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 Faraday data and credentials are handled as safely as possible.

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