ros2_medkit_mcp

A thin MCP (Model Context Protocol) adapter that connects an LLM to an existing SOVD HTTP API exposed by ros2_medkit.

Overview

This server does not implement SOVD itself. It provides MCP tools that call the existing HTTP endpoints of a running ros2_medkit gateway.

Features

• Full ros2_medkit gateway coverage: Discovery, component data, operations (services/actions), and configurations (ROS 2 parameters)
• Dual transport support: stdio and streamable-http
• Async HTTP client using httpx
• Pydantic validation for configuration and models
• Bearer token authentication support

Quick Start

Prerequisites

• Python 3.11+
• Poetry
• A running ros2_medkit gateway (default: http://localhost:8080)

Installation

# Clone the repository
git clone https://github.com/selfpatch/ros2_medkit_mcp.git
cd ros2_medkit_mcp

# Install dependencies
poetry install

Configuration

The server is configured via environment variables:

Variable	Default	Description
ROS2_MEDKIT_BASE_URL	http://localhost:8080/api/v1	Base URL of the ros2_medkit SOVD API
ROS2_MEDKIT_BEARER_TOKEN	(none)	Optional Bearer token for authentication
ROS2_MEDKIT_TIMEOUT_S	30	HTTP request timeout in seconds

Running the Server

stdio Transport (for Claude Desktop, etc.)

poetry run ros2-medkit-mcp-stdio

For Claude Desktop, add to your claude_desktop_config.json:

{
  "mcpServers": {
    "ros2_medkit": {
      "command": "poetry",
      "args": ["run", "ros2-medkit-mcp-stdio"],
      "cwd": "/path/to/ros2_medkit_mcp",
      "env": {
        "ROS2_MEDKIT_BASE_URL": "http://localhost:8080/api/v1"
      }
    }
  }
}

Streamable HTTP Transport

poetry run ros2-medkit-mcp-http --host 0.0.0.0 --port 8765

The server will be available at http://0.0.0.0:8765/mcp.

VS Code MCP Configuration

See the examples/ directory for ready-to-use MCP configuration files:

• mcp-stdio.json - Local stdio transport
• mcp-http.json - HTTP transport for remote server

Docker

# Build image
docker build -t ros2-medkit-mcp .

# Run HTTP server (default)
docker run -p 8765:8765 ros2-medkit-mcp

# Run with stdio transport
docker run -i ros2-medkit-mcp stdio

# With custom gateway URL
docker run -p 8765:8765 -e ROS2_MEDKIT_BASE_URL=http://host.docker.internal:8080/api/v1 ros2-medkit-mcp

Using docker-compose:

docker-compose up

Using Docker Image as MCP Server in VS Code

To use the Docker image as an MCP server in VS Code with the GitHub Copilot extension:

1. Start the MCP server container:

   docker run -d --name ros2-medkit-mcp -p 8765:8765 \
     -e ROS2_MEDKIT_BASE_URL=http://host.docker.internal:8080/api/v1 \
     ghcr.io/selfpatch/ros2_medkit_mcp:latest

2. Configure VS Code MCP settings (.vscode/mcp.json or user settings):

   {
     "servers": {
       "ros2_medkit": {
         "type": "sse",
         "url": "http://localhost:8765/mcp",
         "headers": {}
       }
     }
   }

3. Verify the connection by checking the health endpoint:

   curl http://localhost:8765/health

   Expected response:

   {"status": "healthy", "service": "ros2_medkit_mcp", "sovd_url": "http://host.docker.internal:8080/api/v1"}

4. Use with Copilot Chat - the MCP tools will be available for querying ROS 2 system state via SOVD API.

Note: Use host.docker.internal to connect from the container to services running on your host machine (like ros2_medkit gateway).

MCP Tools

Discovery Tools

sovd_version

Get the SOVD API version information.

Arguments: None Returns: JSON version object from GET /version-info

sovd_entities_list

List all SOVD entities (areas, components, apps, and functions) with optional filtering.

Arguments:

• filter (optional, string): Substring filter applied to entity id and name fields

Returns: Combined array of areas from GET /areas, components from GET /components, apps from GET /apps, and functions from GET /functions (when those endpoints are available)

sovd_entities_get

Get a specific entity by ID with live data if available.

Arguments:

• entity_id (required, string): The entity identifier

Returns: Entity object with optional data field for components

sovd_faults_list

List faults for a specific component.

Arguments:

• component_id (required, string): The component identifier

Returns: Array of fault objects from GET /components/{component_id}/faults

sovd_faults_get

Get a specific fault by ID.

Arguments:

• component_id (required, string): The component identifier
• fault_id (required, string): The fault identifier

Returns: Fault object from GET /components/{component_id}/faults/{fault_id}

sovd_faults_clear

Clear (acknowledge/dismiss) a fault.

Arguments:

• component_id (required, string): The component identifier
• fault_id (required, string): The fault identifier to clear

Returns: Response from DELETE /components/{component_id}/faults/{fault_id}

sovd_area_components

List all components within a specific area.

Arguments:

• area_id (required, string): The area identifier (e.g., 'powertrain', 'chassis', 'body')

Returns: Array of component objects from GET /areas/{area_id}/components

Entity Data Tools

sovd_entity_data

Read all topic data from an entity (component or app).

Arguments:

• entity_id (required, string): The entity identifier
• entity_type (optional, string): Entity type - 'components' or 'apps' (default: 'components')

Returns: Array of topic data from GET /{entity_type}/{entity_id}/data

sovd_entity_topic_data

Read data from a specific topic within an entity.

Arguments:

• entity_id (required, string): The entity identifier
• topic_name (required, string): The topic name (e.g., 'temperature', 'rpm')
• entity_type (optional, string): Entity type - 'components' or 'apps' (default: 'components')

Returns: Topic data from GET /{entity_type}/{entity_id}/data/{topic_name}

sovd_publish_topic

Publish data to a component's topic.

Arguments:

• component_id (required, string): The component identifier
• topic_name (required, string): The topic name to publish to
• data (required, object): The message data to publish as JSON object

Returns: Response from PUT /components/{component_id}/data/{topic_name}

Operations Tools (Services & Actions)

sovd_list_operations

List all operations (services and actions) available for a component.

Arguments:

• component_id (required, string): The component identifier

Returns: Array of operations from GET /components/{component_id}/operations

sovd_create_execution

Call a ROS 2 service or send an action goal.

Arguments:

• entity_id (required, string): The entity identifier
• operation_name (required, string): The operation name (service or action)
• request_data (optional, object): Request data (parameters for actions/services)
• entity_type (optional, string): Entity type - 'components', 'apps', 'areas', or 'functions' (default: 'components')

Returns: Response from POST /{entity_type}/{entity_id}/operations/{operation_name}/executions

sovd_get_execution

Get the current status of a running action execution.

Arguments:

• entity_id (required, string): The entity identifier
• operation_name (required, string): The action name
• execution_id (required, string): The execution ID (goal_id)
• entity_type (optional, string): Entity type (default: 'components')

Returns: Status from GET /{entity_type}/{entity_id}/operations/{operation_name}/executions/{execution_id}

sovd_list_executions

List all executions for an operation.

Arguments:

• entity_id (required, string): The entity identifier
• operation_name (required, string): The action name
• entity_type (optional, string): Entity type (default: 'components')

Returns: List from GET /{entity_type}/{entity_id}/operations/{operation_name}/executions

sovd_cancel_execution

Cancel a running action execution.

Arguments:

• entity_id (required, string): The entity identifier
• operation_name (required, string): The action name
• execution_id (required, string): The execution ID (goal_id)
• entity_type (optional, string): Entity type (default: 'components')

Returns: Response from DELETE /{entity_type}/{entity_id}/operations/{operation_name}/executions/{execution_id}

Configuration Tools (ROS 2 Parameters)

sovd_list_configurations

List all configurations (ROS 2 parameters) for a component.

Arguments:

• component_id (required, string): The component identifier

Returns: Array of parameters from GET /components/{component_id}/configurations

sovd_get_configuration

Get a specific configuration (parameter) value.

Arguments:

• component_id (required, string): The component identifier
• param_name (required, string): The parameter name

Returns: Parameter value from GET /components/{component_id}/configurations/{param_name}

sovd_set_configuration

Set a configuration (parameter) value.

Arguments:

• component_id (required, string): The component identifier
• param_name (required, string): The parameter name
• value (required, any): The new parameter value (string, number, boolean, or array)

Returns: Response from PUT /components/{component_id}/configurations/{param_name}

sovd_delete_configuration

Reset a configuration (parameter) to its default value.

Arguments:

• component_id (required, string): The component identifier
• param_name (required, string): The parameter name

Returns: Response from DELETE /components/{component_id}/configurations/{param_name}

sovd_delete_all_configurations

Reset all configurations (parameters) to their default values.

Arguments:

• component_id (required, string): The component identifier

Returns: Response from DELETE /components/{component_id}/configurations

MCP Resources

sovd://openapi

Returns information about the OpenAPI specification location.

Development

Setup

# Install dependencies including dev tools
poetry install

# Install pre-commit hooks
poetry run pre-commit install

Running Tests

# Use the test runner script (recommended, avoids ROS 2 plugin conflicts)
poetry run python run_tests.py -v

# Or directly if not in a ROS 2 environment
poetry run pytest -v

Code Quality

# Run all pre-commit hooks
poetry run pre-commit run --all-files

# Or run individually:
poetry run ruff check src/ tests/     # Linting
poetry run ruff format src/ tests/    # Formatting
poetry run mypy src/                   # Type checking

License