# How to connect Trestle with ChatGPT

```json
{
  "title": "How to connect Trestle with ChatGPT",
  "toolkit": "Trestle",
  "toolkit_slug": "trestle",
  "framework": "ChatGPT",
  "framework_slug": "chatgpt",
  "url": "https://composio.dev/toolkits/trestle/framework/chatgpt",
  "markdown_url": "https://composio.dev/toolkits/trestle/framework/chatgpt.md",
  "updated_at": "2026-10-31T05:40:42.412Z"
}
```

## Introduction

### How to connect Trestle MCP with ChatGPT
[ChatGPT](https://chatgpt.com/) can take action across your apps and files, stay with a project for hours, and turn a goal into finished materials like sheets, slides, and docs, not just answers.
In this guide, I will explain the easiest and most secure way to connect your Trestle account to ChatGPT via Composio Connect, so it can validate phone numbers, identify callers, look up phone records, and verify addresses through natural language commands without ever putting your account credentials at risk.

## Also integrate Trestle with

- [Claude Cowork](https://composio.dev/toolkits/trestle/framework/claude-cowork)
- [Hermes](https://composio.dev/toolkits/trestle/framework/hermes-agent)
- [Atomic Agent](https://composio.dev/toolkits/trestle/framework/atomic-agent)

## TL;DR

### Why use Composio over default connectors?
- Apps with read and write access. Default connectors mostly can read your data. Composio's Trestle integration lets ChatGPT take actions like creating drafts, sending updates, labeling records, and more.
- 1,500+ SaaS toolkits out of the box. Composio gives you instant access to a vast catalog of pre-built connectors, from Gmail and Slack to Notion, Linear, and Salesforce.
- One MCP server for every app. Connect any of your applications on demand through a single endpoint, rather than juggling a separate server for each app.
- Smart, context-aware tool loading. Unlike traditional MCP servers that dump every available tool into the LLM context window, Composio searches for and loads only the tools relevant to the task at hand.
- Cross-app automation. Chain actions across multiple apps in a single run - fetch a thread, summarize it in Notion, and post highlights to Slack without leaving the conversation.

## Connect Trestle to ChatGPT

### Prerequisites
- A ChatGPT account. We will use the [ChatGPT desktop app](https://openai.com/chatgpt/download/), and the steps are the same on the web.
- Access to the Trestle workspace you want to connect.
- [Composio plugin](https://dashboard.composio.dev/login?utm_source=toolkits&utm_medium=framework_template&utm_campaign=chatgpt&utm_content=composio_connect&next=%2F~%2Forg%2Fconnect%2Fclients%2Fchatgpt).
Note: Composio connects through OAuth. You will be asked to sign in and approve specific permissions. Review the permission screen carefully if you are using a work account.
### Step-by-step: Connect Trestle to ChatGPT
### 1. Install the Composio plugin
Click the button. ChatGPT opens the Composio plugin page. Click Install plugin.
[Install in ChatGPT](https://chatgpt.com/plugins/plugin_asdk_app_6a58503580c08191b78cc5bdaf4eba6e)
You can also find it inside ChatGPT: go to Settings, open Plugins, search the marketplace for Composio, and click Install plugin.
### 2. Authenticate
After you install, ChatGPT asks you to authenticate with Composio. Log in and click Allow access to authorize ChatGPT to use your Composio account.
### 3. Start using Composio
That is it. Composio tools are now available in ChatGPT. Type @Composio followed by your request, for example @Composio find unread Trestle messages and summarize them, and it will run the actions you authorize. On first use it asks you to authorize Trestle.
### Option 2: Add Composio as an MCP server
If you cannot use the plugin marketplace, add Composio as a custom MCP server instead.
### 1. Open the MCP settings
In ChatGPT, go to Settings and open the Plugins section. Inside the Plugins page, click the MCP tab.
### 2. Add the server
Click Add server. In the Name field enter Composio, for Type select Streamable HTTP, and in the URL field paste the Composio MCP server URL:

```bash
https://connect.composio.dev/mcp
```

## 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.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `TRESTLE_LOOKUP_PHONE_OWNERS` | 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. This sensitive lookup is potentially billable; it is not people, company, or mobile discovery and must not be used for employment eligibility, candidate screening, outbound marketing, or automated consequential decisions. |
| `TRESTLE_VALIDATE_PHONE` | Validate Phone | Validate a supplied phone number and return activity, carrier, line-type, country, and prepaid signals. This sensitive lookup is potentially billable and must not be used for employment eligibility, candidate screening, outbound marketing, or automated consequential decisions. |
| `TRESTLE_VERIFY_CONTACT` | Verify Contact | Verify supplied contact details for identity or inbound-lead verification and return phone, email, address, and IP match signals. This sensitive lookup is potentially billable; it does not discover contacts and must not be used for employment eligibility, candidate screening, outbound marketing, or automated consequential decisions. |

## Supported Triggers

None listed.

## Creating MCP Server - Stand-alone vs Composio SDK

Once connected, ChatGPT can access the Trestle MCP server via Composio to run actions that you authorize, directly in your workspace.

## Complete Code

None listed.

## How to build Trestle MCP Agent with another framework

- [Claude Cowork](https://composio.dev/toolkits/trestle/framework/claude-cowork)
- [Hermes](https://composio.dev/toolkits/trestle/framework/hermes-agent)
- [Atomic Agent](https://composio.dev/toolkits/trestle/framework/atomic-agent)

## Related Toolkits

- [Supabase](https://composio.dev/toolkits/supabase) - Supabase is an open-source backend platform offering scalable Postgres databases, authentication, storage, and real-time APIs. It lets developers build modern apps without managing infrastructure.
- [Codeinterpreter](https://composio.dev/toolkits/codeinterpreter) - Codeinterpreter is a Python-based coding environment with built-in data analysis and visualization. It lets you instantly run scripts, plot results, and prototype solutions inside supported platforms.
- [GitHub](https://composio.dev/toolkits/github) - GitHub is a code hosting platform for version control and collaborative software development. It streamlines project management, code review, and team workflows in one place.
- [1password](https://composio.dev/toolkits/_1password) - 1Password is a password manager and digital vault for storing logins, secrets, notes, and secure documents. It helps individuals and teams protect credentials, share access safely, and reduce password risk.
- [Ably](https://composio.dev/toolkits/ably) - Ably is a real-time messaging platform for live chat and data sync in modern apps. It offers global scale and rock-solid reliability for seamless, instant experiences.
- [Abuselpdb](https://composio.dev/toolkits/abuselpdb) - Abuselpdb is a central database for reporting and checking IPs linked to malicious online activity. Use it to quickly identify and report suspicious or abusive IP addresses.
- [Alchemy](https://composio.dev/toolkits/alchemy) - Alchemy is a blockchain development platform offering APIs and tools for Ethereum apps. It simplifies building and scaling Web3 projects with robust infrastructure.
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- [Anakin](https://composio.dev/toolkits/anakin_io) - Anakin is a web automation platform offering scraping, crawling, search, and browser automation. Use it to extract structured data, automate site tasks, and monitor web changes reliably.
- [Anchor browser](https://composio.dev/toolkits/anchor_browser) - Anchor browser is a developer platform for AI-powered web automation. It transforms complex browser actions into easy API endpoints for streamlined web interaction.
- [Apiflash](https://composio.dev/toolkits/apiflash) - Apiflash is a website screenshot API for programmatically capturing web pages. It delivers high-quality screenshots on demand for automation, monitoring, or reporting.
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- [Appveyor](https://composio.dev/toolkits/appveyor) - AppVeyor is a cloud-based continuous integration service for building, testing, and deploying applications. It helps developers automate and streamline their software delivery pipelines.
- [Authyo](https://composio.dev/toolkits/authyo) - Authyo is a REST API service for passwordless authentication, OTP verification, session management, and transactional notifications. Use it to add secure login flows and user verification without building auth infrastructure from scratch.
- [AWS Marketplace MCP](https://composio.dev/toolkits/aws_marketplace_mcp) - AWS Marketplace MCP provides MCP access to AWS Marketplace's cloud software, data, and services catalog. Use it to discover, compare, and evaluate 30K+ AWS Marketplace listings faster.
- [Azure Monitor Activity Log](https://composio.dev/toolkits/azure_monitor_activity_log) - Azure Monitor Activity Log is Azure's service that records management and control-plane events for a subscription. Use it to audit changes, troubleshoot issues, and track resource operations across your Azure resources.
- [Backendless](https://composio.dev/toolkits/backendless) - Backendless is a backend-as-a-service platform for mobile and web apps, offering database, file storage, user authentication, and APIs. It helps developers ship scalable applications faster without managing server infrastructure.
- [Baserow](https://composio.dev/toolkits/baserow) - Baserow is an open-source no-code database platform for building collaborative data apps. It makes it easy for teams to organize data and automate workflows without writing code.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Trestle MCP?

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.

### Can I use Tool Router MCP with ChatGPT?

Yes, you can. ChatGPT 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.

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

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.

### 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 Trestle data and credentials are handled as safely as possible.

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