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How to connect Phone Harness with ChatGPT

Connect ChatGPT to Phone Harness MCP. Create a cloud android phone session, list active phone harness phone sessions, and more using natural language, with authentication handled for you.

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Phone Harness is a cloud platform for running managed Android phone sessions. It simplifies Android lifecycle control, session observation, and secure ADB access.

21 Tools

How to connect Phone Harness MCP with ChatGPT

ChatGPT 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 Phone Harness account to ChatGPT via Composio Connect, so it can create Android sessions, monitor phone state, manage session lifecycles, and run ADB commands through natural language commands without ever putting your account credentials at risk.

Also integrate Phone Harness with

Claude CoworkHermesAtomic Agent

Why use Composio over default connectors?

  • Apps with read and write access. Default connectors mostly can read your data. Composio's Phone Harness 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.

Prerequisites

  • A ChatGPT account. We will use the ChatGPT desktop app, and the steps are the same on the web.
  • Access to the Phone Harness workspace you want to connect.
  • Composio plugin.

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 Phone Harness to ChatGPT

1. Install the Composio plugin

Click the button. ChatGPT opens the Composio plugin page. Click Install plugin.

Install in ChatGPT

Composio plugin page in ChatGPT with the Install plugin button

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.

Composio login and Allow access screen for ChatGPT

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 Phone Harness messages and summarize them, and it will run the actions you authorize. On first use it asks you to authorize Phone Harness.

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.

ChatGPT settings showing the Plugins page with the MCP tab selected

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
ChatGPT Add server dialog with the name Composio, type Streamable HTTP, and the Composio MCP URL

Then click Save. The Composio server now appears in your MCP plugins list.

ChatGPT Plugins page showing the Composio MCP server added to the list

3. Authenticate

Click Authenticate on the Composio entry, log in via Composio, and click Allow access. Composio tools are then available in ChatGPT the same way as with the plugin.

What you can do after connecting Phone Harness

  • Create a cloud Android phone session
  • List active Phone Harness phone sessions
  • Run ADB command on Android session

Security + privacy notes (important)

  • Use least-privilege access: Only grant permissions you actually need.
  • Review OAuth permissions before approving: Make sure requested scopes match what you expect Composio and ChatGPT to do.
  • Keep write actions human-reviewed: For actions like sending messages, creating labels, or editing drafts, keep manual confirmation enabled.
  • Be careful with sensitive data: Avoid using this setup with highly sensitive information unless allowed by your personal, company, or client policies.
TOOLS

Supported Tools

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

Create API Key

Create an account-wide API bearer key that can manage API keys.

Create Session

Start a temporary or saved Android emulator session and return its admitted session data plus the internally generated idempotency key.

Enable ADB

Enable or re-enable ADB access for a ready Android session and return its current connection endpoint and sensitive unlock code.

End Session

Request that a Phone Harness session end and billing closure be recorded.

Get Account

Get the connected account's identity, balance, Android profile choices, active-session capacity, and whether a new session can be started.

Get ADB

Get the current ADB state for an Android session.

Get API Health

Check public Phone Harness API-process liveness only.

Get Owner Viewer

Create a secret, short-lived capability for interactive owner control of a ready session.

Get Recent History

Return up to 100 finished sessions ordered by creation time descending.

Get Session

Get one session's current lifecycle state, deadline, screen geometry, and ADB details.

Get Snapshot

Download the latest still image from a ready Phone Harness session as a file.

Create View-Only Link

Create a short-lived view-only link for an intended person to watch a live session.

List API Keys

List metadata for the connected account's API keys, including hashes, labels, hints, creation times, and revocation times.

List History

Return one cursor-paginated page of finished-session history in newest-first order, with a next cursor for complete traversal.

List Sessions

List all active account sessions, including provisioning, terminal-error, closing, and cleanup-pending entries.

Recover Create Request

Read the durable receipt for an idempotent session create to resolve an ambiguous create result or confirm asynchronous release cleanup.

Reset ADB Code

Rotate the ADB unlock code for an Android session, invalidate the previous code, and close all existing ADB connections.

Reset Device

Irreversibly erase and reprovision an assigned iPhone, deleting its apps, accounts, and data.

Reset Profile

Irreversibly delete the saved Android profile's apps, logins, and data.

Revoke ADB

Revoke ADB access for an Android session.

Revoke API Key

Idempotently revoke an API key by its hash.

FRAMEWORKS

How to build Phone Harness MCP Agent with another framework

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Claude Cowork

Use Phone Harness MCP with Claude Cowork

Hermes logo

Hermes

Use Phone Harness MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Phone Harness MCP with Atomic Agent

FAQ

Frequently asked questions

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

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 Phone Harness tools.

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

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