How to integrate Braintrust MCP with Autogen

This guide walks you through connecting Braintrust to AutoGen using the Composio tool router. By the end, you'll have a working Braintrust agent that can compare failed evaluations across recent experiments, create dataset from production failure logs, summarize latency spikes in braintrust traces through natural language commands. This guide will help you understand how to give your AutoGen agent real control over a Braintrust account through Composio's Braintrust MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

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Braintrust is an AI engineering platform for prompts, datasets, experiments, evaluations, observability, and production AI apps. Use it to ship better AI systems with faster debugging, clearer evals, and tighter feedback loops.

17 Tools

Introduction

This guide walks you through connecting Braintrust to AutoGen using the Composio tool router. By the end, you'll have a working Braintrust agent that can compare failed evaluations across recent experiments, create dataset from production failure logs, summarize latency spikes in braintrust traces through natural language commands.

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

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

Also integrate Braintrust with

OpenAI Agents SDKClaude Agent SDKClaude CodeClaude CoworkCodexOpenClawHermesCLIGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAI

TL;DR

Here's what you'll learn:
  • Get and set up your OpenAI and Composio API keys
  • Install the required dependencies for Autogen and Composio
  • Initialize Composio and create a Tool Router session for Braintrust
  • Wire that MCP URL into Autogen using McpWorkbench and StreamableHttpServerParams
  • Configure an Autogen AssistantAgent that can call Braintrust tools
  • Run a live chat loop where you ask the agent to perform Braintrust operations

What is AutoGen?

Autogen is a framework for building multi-agent conversational AI systems from Microsoft. It enables you to create agents that can collaborate, use tools, and maintain complex workflows.

Key features include:

  • Multi-Agent Systems: Build collaborative agent workflows
  • MCP Workbench: Native support for Model Context Protocol tools
  • Streaming HTTP: Connect to external services through streamable HTTP
  • AssistantAgent: Pre-built agent class for tool-using assistants

What is the Braintrust MCP server, and what's possible with it?

The Braintrust MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Braintrust account. It provides structured and secure access to your projects, prompts, datasets, experiments, evaluations, and observability data, so your agent can create resources, manage evaluation data, inspect events, query results, and update configurations on your behalf.

  • Project and resource management: Have your agent create, list, update, or delete Braintrust projects and manage the experiments, datasets, and prompts within them.
  • Dataset creation and maintenance: Let the agent create datasets, add batches of examples, revise dataset details, and summarize their contents and metrics.
  • Experiment tracking and evaluation: Direct your agent to create experiments, add result events, update experiment details, and retrieve aggregate evaluation summaries.
  • Prompt configuration: Instruct your agent to create versioned prompts and update their metadata or configuration without running them.
  • Observability and data analysis: Have your agent fetch recent project, experiment, or dataset events and run read-only queries over Braintrust data to investigate results.

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

What is Composio SDK?

Composio's Composio SDK 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 Composio SDK

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

How the Composio SDK works

The Composio SDK 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

Step by step08 STEPS
1

Prerequisites

You will need:

  • A Composio API key
  • An OpenAI API key (used by Autogen's OpenAIChatCompletionClient)
  • A Braintrust account you can connect to Composio
  • Some basic familiarity with Autogen and Python async
2

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.
3

Install dependencies

bash
pip install composio python-dotenv
pip install autogen-agentchat autogen-ext-openai autogen-ext-tools

Install Composio, Autogen extensions, and dotenv.

What's happening:

  • composio connects your agent to Braintrust via MCP
  • autogen-agentchat provides the AssistantAgent class
  • autogen-ext-openai provides the OpenAI model client
  • autogen-ext-tools provides MCP workbench support

4

Set up environment variables

bash
COMPOSIO_API_KEY=your-composio-api-key
OPENAI_API_KEY=your-openai-api-key
USER_ID=your-user-identifier@example.com

Create a .env file in your project folder.

What's happening:

  • COMPOSIO_API_KEY is required to talk to Composio
  • OPENAI_API_KEY is used by Autogen's OpenAI client
  • USER_ID is how Composio identifies which user's Braintrust connections to use
5

Import dependencies and create Tool Router session

python
import asyncio
import os
from dotenv import load_dotenv
from composio import Composio

from autogen_agentchat.agents import AssistantAgent
from autogen_ext.models.openai import OpenAIChatCompletionClient
from autogen_ext.tools.mcp import McpWorkbench, StreamableHttpServerParams

load_dotenv()

async def main():
    # Initialize Composio and create a Braintrust session
    composio = Composio(api_key=os.getenv("COMPOSIO_API_KEY"))
    session = composio.create(
        user_id=os.getenv("USER_ID"),
        toolkits=["braintrust"]
    )
    url = session.mcp.url
What's happening:
  • load_dotenv() reads your .env file
  • Composio(api_key=...) initializes the SDK
  • create(...) creates a Tool Router session that exposes Braintrust tools
  • session.mcp.url is the MCP endpoint that Autogen will connect to
6

Configure MCP parameters for Autogen

python
# Configure MCP server parameters for Streamable HTTP
server_params = StreamableHttpServerParams(
    url=url,
    timeout=30.0,
    sse_read_timeout=300.0,
    terminate_on_close=True,
    headers={"x-api-key": os.getenv("COMPOSIO_API_KEY")}
)

Autogen expects parameters describing how to talk to the MCP server. That is what StreamableHttpServerParams is for.

What's happening:

  • url points to the Tool Router MCP endpoint from Composio
  • timeout is the HTTP timeout for requests
  • sse_read_timeout controls how long to wait when streaming responses
  • terminate_on_close=True cleans up the MCP server process when the workbench is closed
7

Create the model client and agent

python
# Create model client
model_client = OpenAIChatCompletionClient(
    model="gpt-5",
    api_key=os.getenv("OPENAI_API_KEY")
)

# Use McpWorkbench as context manager
async with McpWorkbench(server_params) as workbench:
    # Create Braintrust assistant agent with MCP tools
    agent = AssistantAgent(
        name="braintrust_assistant",
        description="An AI assistant that helps with Braintrust operations.",
        model_client=model_client,
        workbench=workbench,
        model_client_stream=True,
        max_tool_iterations=10
    )

What's happening:

  • OpenAIChatCompletionClient wraps the OpenAI model for Autogen
  • McpWorkbench connects the agent to the MCP tools
  • AssistantAgent is configured with the Braintrust tools from the workbench
8

Run the interactive chat loop

python
print("Chat started! Type 'exit' or 'quit' to end the conversation.\n")
print("Ask any Braintrust related question or task to the agent.\n")

# Conversation loop
while True:
    user_input = input("You: ").strip()

    if user_input.lower() in ["exit", "quit", "bye"]:
        print("\nGoodbye!")
        break

    if not user_input:
        continue

    print("\nAgent is thinking...\n")

    # Run the agent with streaming
    try:
        response_text = ""
        async for message in agent.run_stream(task=user_input):
            if hasattr(message, "content") and message.content:
                response_text = message.content

        # Print the final response
        if response_text:
            print(f"Agent: {response_text}\n")
        else:
            print("Agent: I encountered an issue processing your request.\n")

    except Exception as e:
        print(f"Agent: Sorry, I encountered an error: {str(e)}\n")
What's happening:
  • The script prompts you in a loop with You:
  • Autogen passes your input to the model, which decides which Braintrust tools to call via MCP
  • agent.run_stream(...) yields streaming messages as the agent thinks and calls tools
  • Typing exit, quit, or bye ends the loop

Complete Code

Here's the complete code to get you started with Braintrust and AutoGen:

python
import asyncio
import os
from dotenv import load_dotenv
from composio import Composio

from autogen_agentchat.agents import AssistantAgent
from autogen_ext.models.openai import OpenAIChatCompletionClient
from autogen_ext.tools.mcp import McpWorkbench, StreamableHttpServerParams

load_dotenv()

async def main():
    # Initialize Composio and create a Braintrust session
    composio = Composio(api_key=os.getenv("COMPOSIO_API_KEY"))
    session = composio.create(
        user_id=os.getenv("USER_ID"),
        toolkits=["braintrust"]
    )
    url = session.mcp.url

    # Configure MCP server parameters for Streamable HTTP
    server_params = StreamableHttpServerParams(
        url=url,
        timeout=30.0,
        sse_read_timeout=300.0,
        terminate_on_close=True,
        headers={"x-api-key": os.getenv("COMPOSIO_API_KEY")}
    )

    # Create model client
    model_client = OpenAIChatCompletionClient(
        model="gpt-5",
        api_key=os.getenv("OPENAI_API_KEY")
    )

    # Use McpWorkbench as context manager
    async with McpWorkbench(server_params) as workbench:
        # Create Braintrust assistant agent with MCP tools
        agent = AssistantAgent(
            name="braintrust_assistant",
            description="An AI assistant that helps with Braintrust operations.",
            model_client=model_client,
            workbench=workbench,
            model_client_stream=True,
            max_tool_iterations=10
        )

        print("Chat started! Type 'exit' or 'quit' to end the conversation.\n")
        print("Ask any Braintrust related question or task to the agent.\n")

        # Conversation loop
        while True:
            user_input = input("You: ").strip()

            if user_input.lower() in ['exit', 'quit', 'bye']:
                print("\nGoodbye!")
                break

            if not user_input:
                continue

            print("\nAgent is thinking...\n")

            # Run the agent with streaming
            try:
                response_text = ""
                async for message in agent.run_stream(task=user_input):
                    if hasattr(message, 'content') and message.content:
                        response_text = message.content

                # Print the final response
                if response_text:
                    print(f"Agent: {response_text}\n")
                else:
                    print("Agent: I encountered an issue processing your request.\n")

            except Exception as e:
                print(f"Agent: Sorry, I encountered an error: {str(e)}\n")

if __name__ == "__main__":
    asyncio.run(main())

Conclusion

You now have an Autogen assistant wired into Braintrust through Composio's Tool Router and MCP. From here you can:
  • Add more toolkits to the toolkits list, for example notion or hubspot
  • Refine the agent description to point it at specific workflows
  • Wrap this script behind a UI, Slack bot, or internal tool
Once the pattern is clear for Braintrust, you can reuse the same structure for other MCP-enabled apps with minimal code changes.
TOOLS

Supported Tools

Every Braintrust action and event your agent gets out of the box.

Create Dataset

Create a named dataset under a Braintrust project, or return the existing dataset unchanged when its name already exists in that project.

Create Experiment

Create an experiment under a Braintrust project.

Create Project

Create a Braintrust project, or return the existing project unchanged when its name already exists.

Create Prompt

Upsert a versioned prompt configuration under a Braintrust project without invoking it.

Delete Project

Soft-delete a Braintrust project and return its deletion state.

Delete Experiment, Dataset, or Prompt

Delete one Braintrust experiment, dataset, or prompt by UUID for explicit lifecycle cleanup.

Fetch Events

Fetch one newest-to-oldest page of project log, experiment, or dataset events.

Get Braintrust Resource

Get one project, experiment, dataset, prompt, or function by UUID.

Insert Dataset Events

Upsert a batch of examples into an existing Braintrust dataset.

Insert Experiment Events

Upsert a batch of result events into an existing Braintrust experiment.

List Braintrust Resources

List and filter one page of projects, experiments, datasets, prompts, or functions visible to the connected Braintrust API key.

Query Braintrust Data

Run one bounded synchronous read-only BTQL query over Braintrust project logs, an experiment, or a dataset.

Summarize Experiment or Dataset

Return metadata and optional aggregate summaries for one Braintrust experiment or dataset.

Update Dataset

Update the name, description, tags, or metadata of a Braintrust dataset.

Update Experiment

Update selected metadata and linkage fields on a Braintrust experiment.

Update Project

Update selected fields of a Braintrust project.

Update Prompt

Update a Braintrust prompt's metadata or configuration without invoking it.

FRAMEWORKS

How to build Braintrust MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Braintrust MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Braintrust MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Braintrust MCP with Claude Code

Claude Cowork logo

Claude Cowork

Use Braintrust MCP with Claude Cowork

Codex logo

Codex

Use Braintrust MCP with Codex

OpenClaw logo

OpenClaw

Use Braintrust MCP with OpenClaw

Hermes logo

Hermes

Use Braintrust MCP with Hermes

CLI logo

CLI

Use Braintrust MCP with CLI

Google ADK logo

Google ADK

Use Braintrust MCP with Google ADK

LangChain logo

LangChain

Use Braintrust MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Braintrust MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Braintrust MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Braintrust MCP with LlamaIndex

CrewAI logo

CrewAI

Use Braintrust MCP with CrewAI

FAQ

Frequently asked questions

With a standalone Braintrust MCP server, the agents and LLMs can only access a fixed set of Braintrust tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Braintrust and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Autogen 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 Braintrust tools.

Yes, absolutely. You can configure which Braintrust 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.

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 Braintrust data and credentials are handled as safely as possible.

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