API

The complete h3-mcp surface: exports, options, request context, and wire methods.

#API Reference

The runtime surface is deliberately small — one handler factory, four identity helpers, and one error class. Everything else is types you never have to import.

import { defineMcpHandler, defineTool } from "h3-mcp";

Exports

defineMcpHandler, the define* helpers, McpJsonRpcError, and the type index.

Handler Options

Every field of HandlerOptions, including dynamic resolution.

Request Context

event.context.mcp — everything about the request in flight.

JSON-RPC Methods

What the handler answers, and on which era.