pip install litestar-mcp
# or
uv add litestar-mcp

from litestar import Litestar, get, post
from litestar.openapi.config import OpenAPIConfig
from litestar_mcp import LitestarMCP

# Mark routes for MCP exposure using the opt attribute
@get("/users", mcp_tool="list_users")
async def get_users() -> list[dict]:
    """List all users in the system."""
    return [{"id": 1, "name": "Alice"}, {"id": 2, "name": "Bob"}]

@post("/analyze", mcp_tool="analyze_data")
async def analyze_data(data: dict) -> dict:
    """Analyze the provided data and return insights."""
    return {"result": f"Analyzed {len(data)} items"}

@get("/config", mcp_resource="app_config")
async def get_app_config() -> dict:
    """Get the current application configuration."""
    return {"debug": True, "version": "1.0.0"}

# Add the MCP plugin to your Litestar app
app = Litestar(
    route_handlers=[get_users, analyze_data, get_app_config],
    plugins=[LitestarMCP()],
    openapi_config=OpenAPIConfig(title="My API", version="1.0.0"),
)

from litestar_mcp import MCP

# 1. Initialize the application
mcp = MCP("my-mcp-server", instructions="Exposes utility tools.")

# 2. Register tools, resources, or prompts using decorators
@mcp.tool()
def add(a: int, b: int) -> int:
    """Calculate the sum of two integers."""
    return a + b

# 3. Expose the app globally so that the CLI can discover it
app = mcp.app

if __name__ == "__main__":
    # 4. Boot the server using Server-Sent Events (SSE)
    mcp.run(port=8000)

from litestar_mcp import LitestarMCP, MCPConfig

config = MCPConfig(
    base_path="/api/mcp",  # Change the base path
    name="Custom Server Name",  # Override server name
    include_in_schema=True,  # Include MCP routes in OpenAPI schema
)

app = Litestar(
    route_handlers=[get_users, analyze_data, get_app_config],
    plugins=[LitestarMCP(config)],
    openapi_config=OpenAPIConfig(title="My API", version="1.0.0"),
)

@get("/schema", mcp_resource="database_schema")
async def get_schema() -> dict:
    """Database schema information."""
    return {"tables": ["users", "orders"], "relationships": [...]}

@get("/docs", mcp_resource="api_docs")
async def get_documentation() -> dict:
    """API documentation and usage examples."""
    return {"endpoints": [...], "examples": [...]}

@post("/users", mcp_tool="create_user")
async def create_user(user_data: dict) -> dict:
    """Create a new user account."""
    # Perform user creation logic
    return {"id": 123, "created": True}

@get("/search", mcp_tool="search_data")
async def search(query: str, limit: int = 10) -> dict:
    """Search through application data."""
    # Perform search with parameters
    return {"results": [...], "total": 42}

curl -X POST http://127.0.0.1:8000/mcp \
  -H 'Content-Type: application/json' \
  -H 'MCP-Protocol-Version: 2026-07-28' \
  -H 'Mcp-Method: server/discover' \
  -d '{"jsonrpc":"2.0","id":1,"method":"server/discover","params":{"_meta":{"io.modelcontextprotocol/protocolVersion":"2026-07-28","io.modelcontextprotocol/clientCapabilities":{},"io.modelcontextprotocol/clientInfo":{"name":"curl","version":"1"}}}}'

from litestar_mcp import MCPConfig

config = MCPConfig()

from litestar import Litestar, get, post, delete
from litestar.openapi.config import OpenAPIConfig
from litestar_mcp import LitestarMCP, MCPConfig

# Resources - read-only reference data
@get("/users/schema", mcp_resource="user_schema")
async def get_user_schema() -> dict:
    """User data model schema."""
    return {
        "type": "object",
        "properties": {
            "id": {"type": "integer"},
            "name": {"type": "string"},
            "email": {"type": "string"}
        }
    }

@get("/api/info", mcp_resource="api_info")
async def get_api_info() -> dict:
    """API capabilities and information."""
    return {
        "version": "2.0.0",
        "features": ["user_management", "data_analysis"],
        "rate_limits": {"requests_per_minute": 1000}
    }

# Tools - actionable operations
@get("/users", mcp_tool="list_users")
async def list_users(limit: int = 10) -> dict:
    """List users with optional limit."""
    # Fetch users from database
    return {"users": [{"id": 1, "name": "Alice"}], "total": 1}

@post("/users", mcp_tool="create_user")
async def create_user(user_data: dict) -> dict:
    """Create a new user account."""
    # Create user logic
    return {"id": 123, "created": True, "user": user_data}

@post("/analyze", mcp_tool="analyze_dataset")
async def analyze_dataset(config: dict) -> dict:
    """Analyze data with custom configuration."""
    # Analysis logic
    return {"insights": [...], "metrics": {...}}

# Regular routes (not exposed to MCP)
@get("/health")
async def health_check() -> dict:
    return {"status": "healthy"}

# MCP configuration
mcp_config = MCPConfig(
    name="User Management API",
    base_path="/mcp"
)

# Create Litestar app
app = Litestar(
    route_handlers=[
        get_user_schema, get_api_info,  # Resources
        list_users, create_user, analyze_dataset,  # Tools
        health_check  # Regular route
    ],
    plugins=[LitestarMCP(mcp_config)],
    openapi_config=OpenAPIConfig(
        title="User Management API",
        version="2.0.0"
    ),
)

from litestar import Litestar
from litestar.middleware import DefineMiddleware
from litestar_mcp import LitestarMCP, MCPConfig

app = Litestar(
    route_handlers=[...],
    plugins=[LitestarMCP(MCPConfig())],
    middleware=[DefineMiddleware(YourAuthMiddleware)],  # MCP gets this for free
)

from litestar import Litestar
from litestar.middleware import DefineMiddleware
from litestar_mcp import LitestarMCP, MCPAuthBackend, MCPConfig, OIDCProviderConfig
from litestar_mcp.auth import MCPAuthConfig

app = Litestar(
    route_handlers=[...],
    plugins=[LitestarMCP(MCPConfig(auth=MCPAuthConfig(
        issuer="https://company.okta.com",
        audience="api://mcp-tools",
    )))],
    middleware=[DefineMiddleware(
        MCPAuthBackend,
        providers=[OIDCProviderConfig(
            issuer="https://company.okta.com",
            audience="api://mcp-tools",
        )],
        user_resolver=lambda claims, app: MyUser(sub=claims["sub"]),
    )],
)

from litestar_mcp import create_oidc_validator

validator = create_oidc_validator(
    "https://cloud.google.com/iap",
    "/projects/PROJECT_NUMBER/global/backendServices/SERVICE_ID",
    algorithms=("ES256",),
    jwks_cache_ttl=1800,
)

# Clone the repository
git clone https://github.com/litestar-org/litestar-mcp.git
cd litestar-mcp

# Install with development dependencies
make install

# Run the complete Python quality gate
make check-all

# Run the pinned MCP 2026-07-28 conformance suite
make conformance

# Build strict documentation and validate examples
make docs
make validate-examples validate-uvx validate-pep723

# Run example
uv run python docs/examples/hello_world/main.py