How to integrate Attio MCP with Claude Agent SDK

This guide walks you through connecting Attio to the Claude Agent SDK using the Composio tool router. By the end, you'll have a working Attio agent that can add a meeting note to john smith’s record, find all companies added this week, list recent notes for acme corp through natural language commands. This guide will help you understand how to give your Claude Agent SDK agent real control over a Attio account through Composio's Attio MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

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Introduction

This guide will help you understand how to give your Claude Agent SDK agent real control over a Attio account through Composio's Attio MCP server.

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

Also integrate Attio with

ChatGPT OpenAI Agents SDK Claude Code Claude Cowork Codex OpenCode Cursor VS Code OpenClaw Hermes CLI Google ADK LangChain Vercel AI SDK Mastra AI LlamaIndex CrewAI

TL;DR

Here's what you'll learn:

Get and set up your Claude/Anthropic and Composio API keys
Install the necessary dependencies
Initialize Composio and create a Tool Router session for Attio
Configure an AI agent that can use Attio as a tool
Run a live chat session where you can ask the agent to perform Attio operations

What is Claude Agent SDK?

The Claude Agent SDK is Anthropic's official framework for building AI agents powered by Claude. It provides a streamlined interface for creating agents with MCP tool support and conversation management.

Key features include:

Native MCP Support: Built-in support for Model Context Protocol servers
Permission Modes: Control tool execution permissions
Streaming Responses: Real-time response streaming for interactive applications
Context Manager: Clean async context management for sessions

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

The Attio MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Attio account. It provides structured and secure access to your team’s relationship and workflow data, so your agent can perform actions like creating records, managing notes, searching your CRM, and organizing lists on your behalf.

Automated record management: Effortlessly create, update, or permanently delete records for people, companies, deals, and more in your Attio workspace.
Smart note taking and retrieval: Let your agent create, list, or delete notes attached to any record, keeping important context and meeting details organized for your team.
Powerful object and list navigation: Retrieve and explore all available objects or lists within your workspace, making it easy for your AI to understand and organize your CRM structure.
Advanced record search and filtering: Find specific CRM records either by unique ID or by searching with custom attributes, ensuring your agent surfaces the right data when you need it.
Comprehensive workspace insight: Get detailed information about object types and their attributes, so your AI-powered workflows always use the right fields and relationships.

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:

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

Step-by-step Guide

Step by step09 STEPS

Prerequisites

Before starting, make sure you have:

Composio API Key and Claude/Anthropic API Key
Primary know-how of Claude Agents SDK
A Attio account
Some knowledge of Python

Getting API Keys for Claude/Anthropic and Composio

Claude/Anthropic API Key

Go to the Anthropic Console and create an API key. You'll need credits to use the models.
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

npm install @anthropic-ai/claude-agent-sdk @composio/core dotenv

Install the Composio SDK and the Claude Agents SDK.

What's happening:

@composio/core provides Composio integration for Anthropic
@anthropic-ai/claude-agent-sdk is the core agent framework
dotenv/config loads environment variables

Set up environment variables

bash

COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_here
ANTHROPIC_API_KEY=your_anthropic_api_key_here

Create a .env file in your project root.

What's happening:

COMPOSIO_API_KEY authenticates with Composio
USER_ID identifies the user for session management
ANTHROPIC_API_KEY authenticates with Anthropic/Claude

Import dependencies

import 'dotenv/config';
import readline from 'node:readline';
import { Composio } from '@composio/core';
import { query, type Options } from "@anthropic-ai/claude-agent-sdk";

dotenv.config();

What's happening:

We're importing all necessary libraries including the Claude Agent SDK and Composio
The dotenv.config() function loads environment variables from your .env file
This setup prepares the foundation for connecting Claude with Attio functionality

Create a Composio instance and Tool Router session

async function chat() {
  const { COMPOSIO_API_KEY, USER_ID } = process.env;
  if (!COMPOSIO_API_KEY || !USER_ID) {
    throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
  }

  const composio = new Composio({ apiKey: COMPOSIO_API_KEY });

  // Create Tool Router session for Attio
  const session = await composio.create(USER_ID, {
    toolkits: ['attio'],
  });
  const mcpUrl = session?.mcp.url;

What's happening:

The function checks for the required COMPOSIO_API_KEY environment variable
We're creating a Composio instance using our API key
The create method creates a Tool Router session for Attio
The returned url is the MCP server URL that your agent will use

Configure Claude Agent with MCP

const options: Options = {
  permissionMode: 'bypassPermissions',
  mcpServers: {
    composio: {
      type: 'http',
      url: mcpUrl,
      headers: { 'x-api-key': COMPOSIO_API_KEY }
    }
  },
  systemPrompt: 'You are a helpful assistant with access to Attio tools via Composio.',
  maxTurns: 10,
};

What's happening:

We're configuring the Claude Agent options with the MCP server URL
permissionMode: 'bypassPermissions' allows the agent to execute operations without asking for permission each time
The system prompt instructs the agent that it has access to Attio
maxTurns: 10 limits the conversation length to prevent excessive API usage

Create client and start chat loop

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    prompt: 'You: '
  });

  console.log('\nChat started. Type "exit" to quit.\n');

  let isProcessing = false;

  async function ask(prompt: string) {
    isProcessing = true;
    rl.pause();

    process.stdout.write('Claude is thinking...');
    const stream = query({ prompt, options });

    let firstChunk = true;
    for await (const msg of stream) {
      const content = (msg as any).message?.content || (msg as any).content;
      if (Array.isArray(content)) {
        for (const block of content) {
          if (block.type === 'text' && block.text) {
            if (firstChunk) {
              process.stdout.write('\r\x1b[K');
              process.stdout.write('Claude: ');
              firstChunk = false;
            }
            process.stdout.write(block.text);
          }
        }
      }
    }
    process.stdout.write('\n\n');

    isProcessing = false;
    rl.resume();
    rl.prompt();
  }

  rl.on('line', async (line) => {
    if (isProcessing) return;

    const input = line.trim();
    if (input === 'exit') {
      rl.close();
      process.exit(0);
    }
    if (input) await ask(input);
    else rl.prompt();
  });

  await ask('What can you help me with?');
}

What's happening:

The readline interface is created to handle user input and output
The query function is used to send the user's input to the agent
The chat loop continues until the user types 'exit' or 'quit'

Run the application

try {
  await chat();
} catch (error) {
  console.error(error);
  process.exit(1);
}

What's happening:

The chat function is the entry point for the application
The try-catch block is used to handle any errors that occur

Complete Code

Here's the complete code to get you started with Attio and Claude Agent SDK:

import 'dotenv/config';
import readline from 'node:readline';
import { Composio } from '@composio/core';
import { query, type Options } from "@anthropic-ai/claude-agent-sdk";

async function chat() {
  const { COMPOSIO_API_KEY, USER_ID } = process.env;
  if (!COMPOSIO_API_KEY || !USER_ID) {
    throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
  }

  const composio = new Composio({ apiKey: COMPOSIO_API_KEY });
  const session = await composio.create(USER_ID, {
    toolkits: ['attio']
  });
  const mcp_url = session?.mcp.url;

  const options: Options = {
    permissionMode: 'bypassPermissions',
    mcpServers: {
      composio: {
        type: 'http',
        url: mcp_url,
        headers: { 'x-api-key': COMPOSIO_API_KEY }
      }
    },
    systemPrompt: 'You are a helpful assistant with access to Attio tools via Composio.',
    maxTurns: 10,
  };

  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    prompt: 'You: '
  });

  console.log('\nChat started. Type "exit" to quit.\n');

  let isProcessing = false;

  async function ask(prompt: string) {
    isProcessing = true;
    rl.pause();

    process.stdout.write('Claude is thinking...');
    const stream = query({ prompt, options });

    let firstChunk = true;
    for await (const msg of stream) {
      const content = (msg as any).message?.content || (msg as any).content;
      if (Array.isArray(content)) {
        for (const block of content) {
          if (block.type === 'text' && block.text) {
            if (firstChunk) {
              process.stdout.write('\r\x1b[K');
              process.stdout.write('Claude: ');
              firstChunk = false;
            }
            process.stdout.write(block.text);
          }
        }
      }
    }
    process.stdout.write('\n\n');

    isProcessing = false;
    rl.resume();
    rl.prompt();
  }

  rl.on('line', async (line) => {
    if (isProcessing) return;

    const input = line.trim();
    if (input === 'exit') {
      rl.close();
      process.exit(0);
    }
    if (input) await ask(input);
    else rl.prompt();
  });

  await ask('What can you help me with?');
}

try {
  await chat();
} catch (error) {
  console.error(error);
  process.exit(1);
}

Conclusion

You've successfully built a Claude Agent SDK agent that can interact with Attio through Composio's Tool Router.

Key features:

Native MCP support through Claude's agent framework
Streaming responses for real-time interaction
Permission bypass for smooth automated workflows

You can extend this by adding more toolkits, implementing custom business logic, or building a web interface around the agent.

TOOLS

Supported Tools

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

Assert Company (Create or Update)

Creates or updates a company record in Attio using a unique attribute to search for existing companies.

Assert Person Record

Tool to create or update person records using a unique attribute to search for existing people.

Assert User Record (Create or Update)

Creates or updates a user record in Attio using a unique attribute to search for existing users.

Assert Workspace (Create or Update)

Creates or updates a workspace record in Attio using a unique attribute to search for existing workspaces.

Create Attribute

Tool to create a new attribute on an object or list in Attio.

Create Comment

Tool to create a new comment on a thread, record, or list entry in Attio.

Create Company

Creates a new company record in Attio.

Create Deal Record

Tool to create a new deal record in Attio.

Create List

Tool to create a new list in Attio.

Create Note

This tool creates a new note on a given record in Attio.

Create Object

Tool to create a new custom object in your Attio workspace.

Create Person

Creates a new person record in Attio.

Create Record

This tool creates a new record in Attio for a specified object type (people, companies, deals, users, workspaces, etc.

Create Select Option

Tool to add a new select option to a select or multiselect attribute in Attio.

Create Status

Tool to add a new status to a status attribute on either an object or a list.

Create Task

Tool to create a new task in Attio.

Create User Record

Creates a new user record in Attio.

Create Webhook

Tool to create a webhook and subscribe to events in Attio.

Create Workspace Record

Creates a new workspace record in Attio.

Delete Comment

Tool to delete a comment by its comment_id.

Delete Company

Tool to delete a company record from Attio by its record_id.

Delete Deal

Tool to delete a deal record from Attio by its record_id.

Delete List Entry

Tool to delete a single list entry by its entry_id in Attio.

Delete Note

This tool allows users to delete a specific note in Attio by its ID.

Delete Person

Tool to delete a person record from Attio by its record_id.

Delete Record

This tool allows you to delete a record from Attio permanently.

Delete Task

Tool to delete a task by its task_id.

Delete User

Tool to delete a user record from Attio by its record_id.

Delete Webhook

Tool to delete a webhook by its webhook_id.

Delete Workspace Record

Tool to delete a workspace record from Attio by its record_id.

Find Record

This tool allows users to find a record in Attio by either its unique ID or by searching using unique attributes.

Get Attribute Details

Tool to get information about a single attribute on either an object or a list.

Get Comment

Tool to get a single comment by its comment_id in Attio.

Get Company

Tool to get a single company record by its record_id in Attio.

Get Deal Record

Tool to get a single deal record by its record_id in Attio.

Get List

Tool to retrieve details of a single list in your Attio workspace.

Get List Entry

Tool to get a single list entry by its entry_id.

Get Note

Tool to get a single note by its note_id in Attio.

Get Object

Tool to get a single object by its object_id or slug.

List Record Entries

Tool to list all entries, across all lists, for which a record is the parent.

Get Current Token Info

Tool to identify the current access token, the workspace it is linked to, and any permissions it has.

Get Task

Tool to get a single task by its task_id in Attio.

List Tasks

Tool to list all tasks in the workspace.

Get Webhook

Tool to get a single webhook by its webhook_id in Attio.

Get Workspace Member

Tool to get a single workspace member by their workspace_member_id.

Get Workspace Record

Tool to get a single workspace record by its record_id.

List Attribute Options

Tool to list all select options for a particular attribute on either an object or a list.

List Attributes

Tool to list the attribute schema for an Attio object or list (including slugs, types, select/status config) to enable correct filtering and writes.

List Attribute Statuses

Tool to list all statuses for a particular status attribute on either an object or a list.

List Call Recordings

Tool to list all call recordings for a meeting in Attio.

List Companies

Tool to list company records in Attio with optional filtering and sorting.

List Company Attribute Values

Tool to get all values for a given attribute on a company record.

List Company Record Entries

Tool to list all entries across all lists for which a company record is the parent in Attio.

List Deal Entries

Tool to list all entries across all lists for which a deal record is the parent in Attio.

List Deal Record Attribute Values

Tool to retrieve all values for a specified attribute on a deal record in Attio.

List Deal Records

Tool to list deal records in Attio with the option to filter and sort results.

List List Entry Attribute Values

Tool to retrieve all values for a specified attribute on a list entry in Attio.

List Lists

This tool retrieves all lists available in the Attio workspace, sorted as they appear in the sidebar.

List Meetings

Tool to list all meetings in the workspace using a deterministic sort order.

List Notes

Lists notes in Attio.

List Objects

This tool retrieves a list of all available objects (both system-defined and user-defined) in the Attio workspace via GET /v2/objects, returning key metadata including slugs and IDs for each object.

List People Attribute Values

Tool to get all values for a given attribute on a person record.

List People Record Entries

Tool to list all entries across all lists for which a person record is the parent in Attio.

List Record Attribute Values

Tool to retrieve all values for a specified attribute on a record in Attio.

List Records

This tool lists records from a specific object type in Attio.

List Threads

Tool to list threads of comments on a record or list entry in Attio.

List User Record Entries

Tool to list all entries across all lists for which a user record is the parent in Attio.

List User Records

Tool to list user records in Attio with optional filtering and sorting.

List Webhooks

Tool to get all webhooks in your Attio workspace.

List Workspace Members

Tool to list workspace members (actors) so agents can reliably assign owners and resolve workspace-member IDs even when the optional Users standard object is disabled.

List Workspace Record Attribute Values

Tool to retrieve all values for a specified attribute on a workspace record in Attio.

List Workspace Record Entries

Tool to list all entries across all lists for which a workspace record is the parent in Attio.

List Workspace Records

Tool to list workspace records with filtering and sorting options.

Patch Record

Tool to update people, companies, and other records by record_id using PATCH method.

Update List Entry by Entry ID

Tool to update list entries by entry_id in Attio.

Get Person

Tool to get a single person record by its record_id in Attio.

List Person Records

Tool to list person records from Attio with optional filtering and sorting.

Create List Entry

Tool to add a record to a list as a new list entry in Attio.

List List Entries

Tool to list entries in a given list, with the option to filter and sort results.

List Records with Query

Tool to list people, company or other records in Attio with the option to filter and sort results.

Assert List Entry by Parent

Tool to create or update a list entry for a given parent record in Attio.

Update List Entry by Entry ID (PUT)

Tool to update list entries by entry_id in Attio using PUT method.

Assert Record (Create or Update)

Tool to create or update people, companies and other records in Attio using a matching attribute.

Put Record (Overwrite)

Tool to update people, companies, and other records by record_id using PUT method.

Query Records

Tool to query records for a specific Attio object using server-side filtering operators and sorting.

Search Records

Tool to fuzzy search for records across multiple objects in Attio.

Update Attribute

Tool to update an existing attribute by its attribute_id or slug.

Update Company

Tool to update a company record in Attio by its record_id.

Update Deal Record

Tool to update an existing deal record in Attio by record ID.

Update List

Tool to update an existing list in Attio.

Update Object

Tool to update a single object's configuration in Attio.

Update Person

Tool to update a person record in Attio by its record_id.

Update Record

This tool updates an existing record in Attio for a specified object type (people, companies, deals, users, workspaces, etc.

Update Select Option

Tool to update an existing select option for a select or multiselect attribute in Attio.

Update Status

Tool to update a status on a status attribute on either an object or a list in Attio.

Update Task

Tool to update an existing task in Attio by its task_id.

Update User Record

Tool to update a user record in Attio by its record_id.

Update Webhook

Tool to update a webhook's target URL and/or event subscriptions.

Update Workspace Record

Tool to update a workspace record by ID using PATCH method.

FRAMEWORKS

How to build Attio MCP Agent with another framework

ChatGPT

Use Attio MCP with ChatGPT

OpenAI Agents SDK

Use Attio MCP with OpenAI Agents SDK

Claude Code

Use Attio MCP with Claude Code

Claude Cowork

Use Attio MCP with Claude Cowork

Codex

Use Attio MCP with Codex

Cursor

Use Attio MCP with Cursor

OpenClaw

Use Attio MCP with OpenClaw

Hermes

Use Attio MCP with Hermes

CLI

Use Attio MCP with CLI

Google ADK

Use Attio MCP with Google ADK

LangChain

Use Attio MCP with LangChain

Vercel AI SDK

Use Attio MCP with Vercel AI SDK

Mastra AI

Use Attio MCP with Mastra AI

LlamaIndex

Use Attio MCP with LlamaIndex

CrewAI

Use Attio MCP with CrewAI

OpenCode

Use Attio MCP with OpenCode

VS Code

Use Attio MCP with VS Code

MORE TOOLKITS

Explore Other Toolkits

Toolkit marketplace

Hubspot

Oauth2Api Key

HubSpot is an all-in-one marketing, sales, and customer service platform. It lets teams nurture leads, automate outreach, and track every customer interaction in one place.

Pipedrive

Oauth2Api Key

Pipedrive is a sales management platform offering pipeline visualization, lead tracking, and workflow automation. It helps sales teams keep deals moving forward efficiently and never miss a follow-up.

Salesforce

Oauth2S2s Oauth2

Salesforce is a leading CRM platform that helps businesses manage sales, service, and marketing. It centralizes customer data, enabling teams to drive growth and build strong relationships.

Apollo

Api Key

Apollo is a CRM and lead generation platform that helps businesses discover contacts and manage sales pipelines. Use it to streamline customer outreach and track your deals from one place.

FAQ

Frequently asked questions

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

Yes, you can. Claude Agent SDK 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 Attio tools.

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

Start with Attio.It takes 30 seconds.

Managed auth, hosted MCP servers, and every Attio tool your agent needs.Free to start.

Start building

Customer stories

Teams ship real agents on Composio

GET STARTED FOR FREE BOOK A DEMO

Karan skipped his own birthday party to fix our critical issue. It was 10pm and he diverted his Waymo to help us instead. This really sets the bar — it shows the commitment you need when users rely on your software.

Harsha Gaddipati

Co-founder, Slashy

A lot of students tell us that the moment their connected tools start talking to each other inside Opennote feels almost magical. The agent just knows them, and it's immensely helped keep new users on the platform.

Abhi Arya

Co-founder, Opennote

We chose Composio over Pipedream because it delivered depth where it mattered — niche tools and tricky edge cases other platforms simply ignored. That gave us confidence to scale without compromising.

Nirman Dave

CEO, Zams

As a solo builder, shipping fast is life or death. The only way I can outcompete incumbents is by outmanoeuvring them. Getting bogged down managing agent auth would have been a death sentence.

Ryan Yu

Founder, Extra Thursday

Before Composio, adding tool integrations was slow and resource-intensive. Each one could take weeks of engineering time, and maintaining them meant constantly keeping up with API changes.

Tomisin Jenrola

Founder & CEO, SwarmZero

With hands-on help from their founder, we integrated Gmail and Google Drive in just 30 minutes. This level of personal support and commitment is exactly what startups should strive for.

Jerome Leclanche

Co-Founder, Ingram Technologies

How to integrate Attio MCP with Claude Agent SDK

Connect Attio without auth hassles

Introduction

Also integrate Attio with

TL;DR

What is Claude Agent SDK?

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

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

What is Composio SDK?

How the Composio SDK works

Step-by-step Guide

Prerequisites

Getting API Keys for Claude/Anthropic and Composio

Install dependencies

Set up environment variables

Import dependencies

Create a Composio instance and Tool Router session

Configure Claude Agent with MCP

Create client and start chat loop

Run the application

Complete Code

Conclusion

Supported Tools

How to build Attio MCP Agent with another framework

ChatGPT

OpenAI Agents SDK

Claude Code

Claude Cowork

Codex

Cursor

OpenClaw

Hermes

CLI

Google ADK

LangChain

Vercel AI SDK

Mastra AI

LlamaIndex

CrewAI

OpenCode

VS Code

Explore Other Toolkits

Hubspot

Pipedrive

Salesforce

Apollo

Frequently asked questions

What are the differences in Tool Router MCP and Attio MCP?+

Can I use Tool Router MCP with Claude Agent SDK?+

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

How safe is my data with Composio Tool Router?+

Start with Attio.It takes 30 seconds.

Teams ship real agents on Composio