# Phone Harness

```json
{
  "name": "Phone Harness",
  "slug": "phone_harness",
  "url": "https://composio.dev/toolkits/phone_harness",
  "markdown_url": "https://composio.dev/toolkits/phone_harness.md",
  "logo_url": "https://logos.composio.dev/api/phone_harness",
  "categories": [
    "developer tools & devops"
  ],
  "is_composio_managed": false,
  "updated_at": "2026-11-06T05:31:55.873Z"
}
```

![Phone Harness logo](https://logos.composio.dev/api/phone_harness)

## Description

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Phone Harness MCP or direct API to create Android sessions, monitor phone state, manage session lifecycles, and run ADB commands through natural language.

## Summary

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

## Categories

- developer tools & devops

## Toolkit Details

- Tools: 21

## Images

- Logo: https://logos.composio.dev/api/phone_harness

## Authentication

- **Api Key**
  - Type: `api_key`
  - Description: Api Key authentication for Phone Harness.
  - Setup:
    - Configure Api Key credentials for Phone Harness.
    - Use the credentials when creating an auth config in Composio.

## Suggested Prompts

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

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `PHONE_HARNESS_CREATE_API_KEY` | Create API Key | Create an account-wide API bearer key that can manage API keys. The raw key is shown only once; store it securely and never log it. |
| `PHONE_HARNESS_CREATE_SESSION` | Create Session | Start a temporary or saved Android emulator session and return its admitted session data plus the internally generated idempotency key. If the initial POST has an ambiguous transport failure, this action recovers or safely replays that same keyed request once. A provisioning result is not ready; poll PHONE_HARNESS_GET_SESSION until state is ready or terminal error. |
| `PHONE_HARNESS_ENABLE_ADB` | Enable ADB | Enable or re-enable ADB access for a ready Android session and return its current connection endpoint and sensitive unlock code. Repeated calls are idempotent. |
| `PHONE_HARNESS_END_SESSION` | End Session | Request that a Phone Harness session end and billing closure be recorded. A cleanup_pending result is asynchronous and continues to consume capacity; use the durable create receipt to confirm cleanup_complete. Repeating cleanup after the session is gone can return session_not_found; that outcome does not prove release or cleanup, even on a repeated call. |
| `PHONE_HARNESS_GET_ACCOUNT` | Get Account | Get the connected account's identity, balance, Android profile choices, active-session capacity, and whether a new session can be started. |
| `PHONE_HARNESS_GET_ADB` | Get ADB | Get the current ADB state for an Android session. Returns exactly a disabled result or the enabled connection endpoint and sensitive unlock credential. |
| `PHONE_HARNESS_GET_HEALTH` | Get API Health | Check public Phone Harness API-process liveness only. This does not certify phone availability, credits, capacity, video, or successful provisioning. |
| `PHONE_HARNESS_GET_OWNER_VIEWER` | Get Owner Viewer | Create a secret, short-lived capability for interactive owner control of a ready session. Embedding is restricted to the configured Phone Harness dashboard origin, not arbitrary third-party origins. Reconnecting does not extend the phone deadline. Return it only for secure handoff to the intended account owner; never log, persist, or publish it. |
| `PHONE_HARNESS_GET_RECENT_HISTORY` | Get Recent History | Return up to 100 finished sessions ordered by creation time descending. Use LIST_HISTORY instead when complete cursor-based traversal is needed. |
| `PHONE_HARNESS_GET_SESSION` | Get Session | Get one session's current lifecycle state, deadline, screen geometry, and ADB details. Use it to poll provisioning; state=error is a terminal startup failure, not success. |
| `PHONE_HARNESS_GET_SNAPSHOT` | Get Snapshot | Download the latest still image from a ready Phone Harness session as a file. The image is PNG or JPEG. A no-frame-yet response is retryable after the session is ready and has rendered a frame. |
| `PHONE_HARNESS_GET_VIEWER` | Create View-Only Link | Create a short-lived view-only link for an intended person to watch a live session. Return the link for secure handoff; it grants no interactive owner control and must not be logged or published. |
| `PHONE_HARNESS_LIST_API_KEYS` | List API Keys | List metadata for the connected account's API keys, including hashes, labels, hints, creation times, and revocation times. This action never returns raw bearer keys. |
| `PHONE_HARNESS_LIST_HISTORY` | List History | Return one cursor-paginated page of finished-session history in newest-first order, with a next cursor for complete traversal. |
| `PHONE_HARNESS_LIST_SESSIONS` | List Sessions | List all active account sessions, including provisioning, terminal-error, closing, and cleanup-pending entries. |
| `PHONE_HARNESS_RECOVER_CREATE_REQUEST` | Recover Create Request | Read the durable receipt for an idempotent session create to resolve an ambiguous create result or confirm asynchronous release cleanup. |
| `PHONE_HARNESS_RESET_ADB_CODE` | Reset ADB Code | Rotate the ADB unlock code for an Android session, invalidate the previous code, and close all existing ADB connections. Returns sensitive replacement connection details that must be used for subsequent connections. |
| `PHONE_HARNESS_RESET_DEVICE` | Reset Device | Irreversibly erase and reprovision an assigned iPhone, deleting its apps, accounts, and data. The reset takes a few minutes; poll PHONE_HARNESS_GET_ACCOUNT until the device state is available before starting it again. Phone Harness refuses the reset while a session holds the device. |
| `PHONE_HARNESS_RESET_PROFILE` | Reset Profile | Irreversibly delete the saved Android profile's apps, logins, and data. The next session using its profile ID starts with a fresh phone. Phone Harness refuses the reset while a live session holds the profile phone. |
| `PHONE_HARNESS_REVOKE_ADB` | Revoke ADB | Revoke ADB access for an Android session. This changes only ADB access: the phone session remains active and session billing continues unaffected. |
| `PHONE_HARNESS_REVOKE_API_KEY` | Revoke API Key | Idempotently revoke an API key by its hash. Identifier existence is not proven by a successful response, and active phone sessions are unaffected. Do not revoke the key used by the current connection if continued Phone Harness access is needed. |

## Supported Triggers

None listed.

## Installation and MCP Setup

### Path 1: SDK Installation

#### Path 1, Step 1: Install Composio

Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
```python
pip install composio composio_openai openai
```

```typescript
npm install @composio/core @composio/openai openai
```

#### Path 1, Step 2: Create a Composio session

Initialize Composio with the OpenAI Responses provider and create a session scoped to Phone Harness
```python
import json
from openai import OpenAI
from composio import Composio
from composio_openai import OpenAIResponsesProvider

composio = Composio(provider=OpenAIResponsesProvider())
client = OpenAI()

session = composio.create(user_id="your-user-id", toolkits=["phone_harness"])
tools = session.tools()
```

```typescript
import OpenAI from "openai";
import { Composio } from "@composio/core";
import { OpenAIResponsesProvider } from "@composio/openai";

const composio = new Composio({ provider: new OpenAIResponsesProvider() });
const client = new OpenAI();

const session = await composio.create("your-user-id", { toolkits: ["phone_harness"] });
const tools = await session.tools();
```

#### Path 1, Step 3: Run Phone Harness tools with your agent

Send a request, execute the Phone Harness tool calls through the session, and print the final answer
```python
response = client.responses.create(
    model="gpt-5.6-sol",
    tools=tools,
    input=[{"role": "user", "content": "Create a cloud Android phone session and return its session ID"}],
)

while True:
    tool_calls = [o for o in response.output if o.type == "function_call"]
    if not tool_calls:
        break
    results = composio.provider.handle_tool_calls(response=response, session=session)
    response = client.responses.create(
        model="gpt-5.6-sol",
        tools=tools,
        previous_response_id=response.id,
        input=[
            {"type": "function_call_output", "call_id": call.call_id, "output": json.dumps(results[i])}
            for i, call in enumerate(tool_calls)
        ],
    )

print(response.output_text)
```

```typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Create a cloud Android phone session and return its session ID" }],
});

while (response.output.some((o) => o.type === "function_call")) {
  const outputs = await composio.provider.handleToolCalls(session, response.output);
  response = await client.responses.create({
    model: "gpt-5.6-sol",
    tools,
    previous_response_id: response.id,
    input: outputs,
  });
}

console.log(response.output_text);
```

### Path 2: MCP Server Setup

#### Path 2, Step 1: Install Composio

Install the Composio SDK and your agent framework
```python
pip install composio claude-agent-sdk
```

```typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
```

#### Path 2, Step 2: Create a session with MCP enabled

Create a session scoped to Phone Harness and read its MCP URL and headers
```python
from composio import Composio

composio = Composio()
session = composio.create(user_id="your-user-id", toolkits=["phone_harness"], mcp=True)
```

```typescript
import { Composio } from "@composio/core";

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["phone_harness"],
  mcp: true,
});
```

#### Path 2, Step 3: Connect your agent to the MCP server

Pass the session's MCP URL and headers to your agent and run a Phone Harness request
```python
import asyncio
from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions, AssistantMessage, TextBlock

options = ClaudeAgentOptions(
    mcp_servers={
        "composio": {
            "type": "http",
            "url": session.mcp.url,
            "headers": session.mcp.headers,
        }
    },
    system_prompt="You are a helpful assistant with access to Phone Harness tools.",
    tools=[],
    allowed_tools=["mcp__composio__*"],
)

async def main():
    async with ClaudeSDKClient(options=options) as client:
        await client.query("Create a cloud Android phone session and return its session ID")
        async for message in client.receive_response():
            if isinstance(message, AssistantMessage):
                for block in message.content:
                    if isinstance(block, TextBlock):
                        print(block.text)

asyncio.run(main())
```

```typescript
import { createMCPClient } from "@ai-sdk/mcp";
import { openai } from "@ai-sdk/openai";
import { generateText, stepCountIs } from "ai";

const client = await createMCPClient({
  transport: { type: "http", url: mcp.url, headers: mcp.headers },
});

const { text } = await generateText({
  model: openai("gpt-5.6-sol"),
  tools: await client.tools(),
  prompt: "Create a cloud Android phone session and return its session ID",
  stopWhen: stepCountIs(10),
});

console.log(text);
await client.close();
```

## Why Use Composio?

### 1. AI Native Phone Harness Integration

- Supports both Phone Harness MCP and direct API integrations
- Structured, LLM-friendly schemas for reliable Android session and ADB tool execution
- Rich coverage for creating, observing, managing, and querying Phone Harness sessions

### 2. Managed Auth

- Securely stores your Phone Harness API key without hard-coding it in agent prompts or application code
- Central place to manage, scope, and revoke Phone Harness access
- Per-user and per-environment credentials help keep Android sessions isolated

### 3. Agent Optimized Design

- Tools are tuned using real error and success rates to improve reliability over time
- Clear inputs and outputs help agents create sessions, inspect phone state, and run ADB commands correctly
- Comprehensive execution logs show what ran, when, and on whose behalf

### 4. Enterprise Grade Security

- Fine-grained RBAC helps control which agents and users can access Phone Harness
- Scoped, least-privilege access to Android sessions and ADB operations
- Full audit trail of agent actions to support review and compliance

## Use Phone Harness with any AI Agent Framework

Choose a framework you want to connect Phone Harness with:

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

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## Frequently Asked Questions

### Do I need my own developer credentials to use Phone Harness with Composio?

Yes, Phone Harness requires you to configure your own API key credentials. Once set up, Composio handles secure credential storage and API request handling for you.

### Can I use multiple toolkits together?

Yes! Composio's Tool Router enables agents to use multiple toolkits. [Learn more](https://docs.composio.dev/tool-router/overview).

### Is Composio secure?

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. [Learn more](https://trust.composio.dev).

### What if the API changes?

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

---
[See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)