LangChain agents on real phones.
Connect a LangChain or LangGraph agent to the mobilerun MCP server with a few lines of Python. It gets 33 tools to run tasks on real Android and iOS phones.
via MCPNo extra package: langchain-mcp-adapters connects to the hosted MCP server directly.
Before you start
- A mobilerun API key from cloud.mobilerun.ai. It starts with
dr_sk_. - Python 3.10 or newer.
- An API key for the model that drives your agent. The example uses OpenAI; any chat model with tool calling works.
- A phone in your mobilerun account to run tasks on. Connecting and listing tools works without one.
Install and set your keys
pip install langchain-mcp-adapters langchain langchain-openai export MOBILERUN_CLOUD_API_KEY=dr_sk_YOUR_API_KEY export OPENAI_API_KEY=YOUR_OPENAI_API_KEY
Connect and build the agent
The client opens a Streamable HTTP connection with your key as a Bearer token and turns every MCP tool into a LangChain tool.
import asyncio
import os
from langchain.agents import create_agent
from langchain_mcp_adapters.client import MultiServerMCPClient
API_KEY = os.environ["MOBILERUN_CLOUD_API_KEY"]
client = MultiServerMCPClient(
{
"mobilerun": {
"transport": "streamable_http",
"url": "https://api.mobilerun.ai/v1/mcp",
"headers": {"Authorization": f"Bearer {API_KEY}"},
}
}
)
async def main():
tools = await client.get_tools()
print(f"{len(tools)} tools:", ", ".join(t.name for t in tools))
# Any tool-calling chat model works. This one needs OPENAI_API_KEY.
agent = create_agent("openai:gpt-5.4", tools)
question = "List my mobilerun devices and say which are ready."
result = await agent.ainvoke(
{"messages": [{"role": "user", "content": question}]}
)
print(result["messages"][-1].content)
asyncio.run(main()) Run python agent.py. It prints the tool names, then the agent's answer. create_agent returns a LangGraph graph, so the same agent also works as a node in a larger LangGraph workflow. It replaces create_react_agent, which LangGraph 1.x marks as deprecated.
Give it only the tools it needs
Some tools change a phone: reset it, remove apps, or start tasks that use credits. For a first agent, pass a short list: tasks, screenshots and device lookups.
STARTER_TOOLS = {
"list_devices", "get_device", "get_device_screenshot", "run_task",
"get_task", "list_tasks", "stop_task", "get_task_media",
}
tools = [t for t in await client.get_tools() if t.name in STARTER_TOOLS]
agent = create_agent("openai:gpt-5.4", tools) Tested 25 Sep 2026 against the live server with Python 3.12, langchain 1.4.2, langchain-mcp-adapters 0.3.2 and langgraph 1.2.12: connected, listed 33 tools, built the agent.
What your agent can do.
33 tools on the hosted server. Your model decides which tool to call. Tasks it starts run on mobilerun's own mobile agent and use credits and device minutes from your plan.
Run agent tasks
Start a task in plain language on a phone, follow its status and steps, send it a message while it runs, or stop it. mobilerun's mobile agent does the tapping and typing.
- run_task
- get_task
- list_tasks
- send_task_message
- stop_task
- get_task_media
See and drive the screen
Take a screenshot, read the on-screen UI as structured text, and tap, swipe or type yourself when you want exact control.
- get_device_screenshot
- get_device_ui_state
- device_action
Manage phones
List your phones, wait until one is ready, reboot or reset it, set its language, timezone and location, and apply saved profiles.
- list_devices
- get_device
- manage_device
- configure_device
- profiles
Apps and files
Install, start, stop and remove apps, upload your own APKs, and move files on and off the phone.
- list_apps_on_device
- manage_device_apps
- apps
- manage_device_files
Logins
Keep app logins in the credentials vault and let tasks use them. Stored values are never sent back to the agent.
- list_credentials
- list_credential_packages
- manage_credentials
Network and eSIM
Route a phone through mobilerun Connect residential IPs or your own SOCKS5 or WireGuard proxy, and manage eSIM profiles.
- connect
- proxies
- manage_esim
Workflows and webhooks
Turn a task into a workflow with a schedule or event trigger, send results to your own webhook endpoints, and look up timezones and app events.
- create_flow
- create_trigger
- create_action
- manage_flow
- list_workflow_resources
- get_workflow_resource
- workflow_events
- webhooks
- platform_catalog
Same server as the MCP setup for Claude Code, Cursor and VS Code.
Good to know.
Which transport does the server use?+
https://api.mobilerun.ai/v1/mcp. The server is stateless and answers POST requests only, so a client set to SSE gets a 405. Choose streamable HTTP in your client.Where does the API key go?+
Authorization: Bearer dr_sk_... header. Read it from an environment variable on your server, and keep it out of code you commit or ship to a browser.What does it cost?+
Can I sign in with OAuth instead of a key?+
Get a key.
Give it a phone.
Create an API key, paste it into the snippet above, and run your first task on a real phone.