Which vehicles are supported by this MCP server?

This MCP server supports GM vehicles from model year 2015 and newer that are equipped with OnStar connectivity. This includes most Chevrolet, GMC, Buick, and Cadillac models. You can verify compatibility by checking if your vehicle has the OnStar button or the myChevrolet/myGMC/myBuick/myCadillac app support.

Do I need an active OnStar subscription to use this server?

Yes, an active OnStar subscription is required to access the GM Connected Vehicle API. The specific features available depend on your OnStar plan. Remote commands like lock/unlock, remote start, and diagnostics require a plan that includes those capabilities. Check your OnStar plan details at my.chevrolet.com or contact OnStar support for more information.

How are vehicle commands secured?

All vehicle commands are authenticated through the GM Developer Portal OAuth flow. Each command requires a valid access token tied to your GM account. The MCP server does not store credentials; it uses the token provided during setup. Only vehicles linked to your GM account can be controlled, and all commands are logged in the OnStar activity history for audit purposes.

General Motors MCP Server for LangChain 14 tools — connect in under 2 minutes

Name: General Motors
Availability: InStock
Author: Vinkius

python.langchain.com/docs/integrations/tools/mcp

Built by Vinkius GDPR 14 Tools Framework

LangChain is the leading Python framework for composable LLM applications. Connect General Motors through Vinkius and LangChain agents can call every tool natively. combine them with retrievers, memory, and output parsers for sophisticated AI pipelines.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from langchain_mcp_adapters.client import MultiServerMCPClient
from langchain_openai import ChatOpenAI
from langgraph.prebuilt import create_react_agent

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    async with MultiServerMCPClient({
        "general-motors": {
            "transport": "streamable_http",
            "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
        }
    }) as client:
        tools = client.get_tools()
        agent = create_react_agent(
            ChatOpenAI(model="gpt-4o"),
            tools,
        )
        response = await agent.ainvoke({
            "messages": [{
                "role": "user",
                "content": "Using General Motors, show me what tools are available.",
            }]
        })
        print(response["messages"][-1].content)

asyncio.run(main())

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* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About General Motors MCP Server

What you can do

Connect AI agents to the General Motors Connected Vehicle API for comprehensive car management:

LangChain's ecosystem of 500+ components combines seamlessly with General Motors through native MCP adapters. Connect 14 tools via Vinkius and use ReAct agents, Plan-and-Execute strategies, or custom agent architectures. with LangSmith tracing giving full visibility into every tool call, latency, and token cost.

List registered vehicles to manage fleets or personal garages
Track GPS location to find parked cars or monitor fleet movement
Monitor diagnostics including oil life, battery voltage, and check engine status
Check EV charge levels and estimated range for electric vehicles
Lock and unlock doors remotely for security or guest access
Start and stop engines remotely to pre-condition cabin temperature
Flash lights and sound horn to locate vehicles in crowded areas
Send navigation destinations directly to the infotainment system

The General Motors MCP Server exposes 14 tools through the Vinkius. Connect it to LangChain in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect General Motors to LangChain via MCP

Follow these steps to integrate the General Motors MCP Server with LangChain.

Install dependencies

Run pip install langchain langchain-mcp-adapters langgraph langchain-openai

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Run the agent

Save the code and run python agent.py

Explore tools

The agent discovers 14 tools from General Motors via MCP

Why Use LangChain with the General Motors MCP Server

LangChain provides unique advantages when paired with General Motors through the Model Context Protocol.

The largest ecosystem of integrations, chains, and agents. combine General Motors MCP tools with 500+ LangChain components

Agent architecture supports ReAct, Plan-and-Execute, and custom strategies with full MCP tool access at every step

LangSmith tracing gives you complete visibility into tool calls, latencies, and token usage for production debugging

Memory and conversation persistence let agents maintain context across General Motors queries for multi-turn workflows

General Motors + LangChain Use Cases

Practical scenarios where LangChain combined with the General Motors MCP Server delivers measurable value.

RAG with live data: combine General Motors tool results with vector store retrievals for answers grounded in both real-time and historical data

Autonomous research agents: LangChain agents query General Motors, synthesize findings, and generate comprehensive research reports

Multi-tool orchestration: chain General Motors tools with web scrapers, databases, and calculators in a single agent run

Production monitoring: use LangSmith to trace every General Motors tool call, measure latency, and optimize your agent's performance

General Motors MCP Tools for LangChain (14)

These 14 tools become available when you connect General Motors to LangChain via MCP:

flash_horn

Requires VIN. Use this to locate a vehicle in a crowded parking lot or driveway. Trigger the horn of a GM vehicle to locate it

flash_lights

Requires VIN. Use this to locate a vehicle in the dark or signal ownership. Flash the headlights and taillights of a GM vehicle

get_charge_status

Requires VIN. Use this to manage EV range anxiety or schedule charging during off-peak hours. Get the charging status and battery level of a GM EV (Bolt, Ultium, etc)

get_fuel_level

Requires VIN. Use this to plan refueling stops or monitor fuel economy. Get the current fuel tank level of a GM vehicle

get_odometer

Requires VIN. Use this to track service intervals, lease mileage limits, or fleet utilization. Get the current mileage (odometer reading) of a GM vehicle

get_tire_pressure

Requires VIN. Use this to identify leaks, ensure safety, or prepare for long trips. Get the current tire pressure readings for all four tires

get_vehicle_diagnostics

Requires VIN. Use this for maintenance scheduling, pre-trip inspections, or health monitoring. Get comprehensive diagnostic data for a GM vehicle

get_vehicle_location

Requires VIN. Use this to find your parked car, track fleet assets, or verify vehicle movement. Get the current GPS location of a specific GM vehicle

get_vehicles

Use this as the first step to identify which VIN to use for commands or diagnostics. List all GM vehicles associated with the account

lock_doors

Requires VIN. Returns command status (success/failed/in-progress). Use this to secure the vehicle after parking or if you forgot to lock it. Lock the doors of a specific GM vehicle remotely

send_turn_by_turn

Requires VIN and a destination object with latitude, longitude, and address. Use this to plan a trip on your phone and have it ready in the car. Send a destination to the vehicle's built-in navigation system

start_vehicle

Requires VIN. Returns command status. Use this to warm up the car in winter or cool it down in summer before entering. Remotely start the engine of a GM vehicle

stop_vehicle

Requires VIN. Returns command status. Use this to cancel a remote start if the vehicle is now in use or if there is a safety concern. Remotely stop the running engine of a GM vehicle

unlock_doors

Requires VIN. Returns command status. Use this to let a passenger in or if keys are locked inside. Unlock the doors of a specific GM vehicle remotely

Example Prompts for General Motors in LangChain

Ready-to-use prompts you can give your LangChain agent to start working with General Motors immediately.

"Start the engine on my Bolt EV and tell me the current battery charge level and estimated driving range."

"Get the current GPS location of my GMC Sierra and flash the lights so I can spot it in the parking lot."

"Send the navigation destination 'Home' to my Cadillac's infotainment system so it's ready when I get in the car."

Troubleshooting General Motors MCP Server with LangChain

Common issues when connecting General Motors to LangChain through the Vinkius, and how to resolve them.

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

General Motors + LangChain FAQ

Common questions about integrating General Motors MCP Server with LangChain.

How does LangChain connect to MCP servers?

Use langchain-mcp-adapters to create an MCP client. LangChain discovers all tools and wraps them as native LangChain tools compatible with any agent type.

Which LangChain agent types work with MCP?

All agent types including ReAct, OpenAI Functions, and custom agents work with MCP tools. The tools appear as standard LangChain tools after the adapter wraps them.