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How to integrate Trestle MCP with Atomic Agent

Connect Atomic Agent to Trestle MCP. Validate this phone number before contacting, identify the caller behind this number, and more using natural language, with authentication handled for you.

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Trestle

Api Key

Trestle is an identity data API platform for phone, caller, and address data. It helps businesses verify contact details and improve data quality.

3 Tools

Managed auth

Connect Trestle without auth hassles

We manage OAuth, API keys, token refresh, and scopes — you just build.

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Introduction

Atomic Agent is an open-source AI agent that runs on your machine and supports local models through llama.cpp. Connect it to 1,500+ apps through Composio, including Trestle.

This guide uses Atomic Agent's built-in Composio integration. You need Atomic Agent v0.5.6 or later, your own Composio API key, and a Trestle account. See the Atomic Agent documentation for installation instructions.

Also integrate Trestle with

ChatGPT Claude Cowork Hermes

How Atomic Agent connects to Trestle

Atomic Agent connects to Composio's Tool Router over Streamable HTTP MCP. It discovers the tools needed for your request, and Composio handles account authentication.

Execution and account-connection tools follow Atomic Agent's configured approval policy. Review any approval prompt before allowing an action on your connected account.

Connect Trestle to Atomic Agent

Sign up or sign in to the Composio dashboard. Copy your API key.
In Atomic Agent, open the Integrations tab and select Composio. Select API key, press e, paste the key, and press Enter. The tools become available immediately, without a restart.
Ask Atomic Agent to do something in Trestle. It searches Composio for the right tool.
On first use, open the sign-in link returned in the chat. Connect your Trestle account, then return to Atomic Agent to continue.

Headless setup

Add the following line to ~/.atomic-agent/.env, replacing YOUR_COMPOSIO_API_KEY with your key. Start Atomic Agent after saving the file.

bash

COMPOSIO_API_KEY=YOUR_COMPOSIO_API_KEY

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

The Trestle MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Trestle account. It provides structured and secure access to identity data, so your agent can validate phone numbers, identify likely phone owners, verify contact details, and review phone, email, address, and IP match signals on your behalf.

Phone number validation: Have your agent check phone activity, carrier, line type, country, and prepaid status for supplied numbers.
Phone owner lookup: Let the agent find ranked person or business owners and current addresses associated with a phone number.
Contact verification: Direct your agent to verify supplied contact details using phone, email, address, and IP match signals.
Inbound lead checks: Instruct your agent to assess contact information for identity or inbound-lead verification before your team follows up.

Use Trestle from Atomic Agent

With your account connected, ask Atomic Agent to work with Trestle in natural language. You can connect more apps through the same Composio integration as you need them.

Visit the Atomic Agent website or inspect the Atomic Agent source code.

Troubleshooting

Why is my API key rejected?

Copy the key directly from the Composio dashboard. Atomic Agent requires ASCII characters because it sends the key in an HTTP header. Remove any extra characters introduced when copying.

Why are Composio tools unavailable after saving a key?

Check that you use Atomic Agent v0.5.6 or later and that Composio is enabled in your configuration. A "composio": { "enabled": false } setting disables the integration while keeping the saved key on disk.

Does Composio have a free plan?

The Hobby plan includes 100,000 tool calls per month. Composio-managed OAuth apps have a lower included allowance. See Composio pricing for the current limits that apply to your connection.

TOOLS

Supported Tools

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

Look Up Phone Owners

Look up ranked person or business owners and current addresses associated with a supplied phone number for permitted caller-identification or identity-management use.

Validate Phone

Validate a supplied phone number and return activity, carrier, line-type, country, and prepaid signals.

Verify Contact

Verify supplied contact details for identity or inbound-lead verification and return phone, email, address, and IP match signals.

FRAMEWORKS

How to build Trestle MCP Agent with another framework

ChatGPT

Use Trestle MCP with ChatGPT

Claude Cowork

Use Trestle MCP with Claude Cowork

Hermes

Use Trestle MCP with Hermes

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FAQ

Frequently asked questions

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

Yes, you can. Atomic Agent 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 Trestle tools.

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

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