LangGraph

Connect StackOne MCP to LangGraph for building stateful multi-agent workflows.

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Overview

LangGraph provides both client and server MCP support through langchain-mcp-adapters, enabling integration with StackOne’s MCP server.

Official Docs

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Installation

uv add langgraph langchain-mcp-adapters langchain-openai

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Quick start

Connect to StackOne MCP and use tools in LangGraph:

import os
import asyncio
import base64
from langgraph.prebuilt import create_react_agent
from langchain_mcp_adapters.client import MultiServerMCPClient
from langchain_openai import ChatOpenAI

# Configure StackOne account
STACKONE_ACCOUNT_ID = "<account_id>"  # Your StackOne account ID

# Encode API key for Basic auth
auth_token = base64.b64encode(
    f"{os.getenv('STACKONE_API_KEY')}:".encode()
).decode()

async def main():
    # Connect to StackOne MCP server
    mcp_client = MultiServerMCPClient({
        "stackone": {
            "url": "https://api.stackone.com/mcp",
            "transport": "streamable_http",
            "headers": {
                "Authorization": f"Basic {auth_token}",
                "x-account-id": STACKONE_ACCOUNT_ID,
                "Content-Type": "application/json",
                "Accept": "application/json,text/event-stream",  # Required by MCP spec
                "MCP-Protocol-Version": "2025-06-18"
            }
        }
    })

    # Get StackOne tools
    tools = await mcp_client.get_tools()

    # Create LangGraph agent with StackOne tools
    agent = create_react_agent(
    ChatOpenAI(model="gpt-5"),
        tools=tools,
        state_modifier="You are a helpful assistant with access to data from connected platforms."
    )

    # Run agent
    for chunk in agent.stream({"messages": [("human", "Search recent calls in Gong")]}):
        print(chunk)

asyncio.run(main())

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Environment variables

STACKONE_API_KEY=<stackone_api_key>
OPENAI_API_KEY=your_openai_key

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Resources

• LangGraph MCP Documentation
• LangGraph Concepts
• LangChain MCP Adapters
• StackOne Authentication

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Optimize and secure

With your agent connected, use StackOne’s platform features to optimize performance and secure every call.

Advanced Tool Search

Reduce context and save tokens.

Deep Query

Search synced records for a fraction of the tokens.

Defender

Block prompt injections before they reach your agent.