rohitg00/ai-engineering-from-scratch · error · RpcError

-32601

-32601

Error message

Method not found

What it means

Error "Method not found" thrown in rohitg00/ai-engineering-from-scratch.

Source

Thrown at phases/13-tools-and-protocols/10-mcp-resources-and-prompts/code/main.py:267

    if not isinstance(params, dict):
        if is_notification:
            return None
        error = RpcError(-32602, "params must be an object")
        return {"jsonrpc": "2.0", "id": request_id, "error": error.as_json()}
    try:
        validate_request_meta(params)
        if is_notification:
            handler = HANDLERS.get(method)
            if handler is not None:
                handler(params)
            return None
        if method == "subscriptions/listen":
            if request_id is None:
                raise RpcError(-32602, "subscriptions/listen requires a request id")
            return subscriptions_listen(request_id, params)
        handler = HANDLERS.get(method)
        if handler is None:
            raise RpcError(-32601, "Method not found", {"method": method})
        return {"jsonrpc": "2.0", "id": request_id, "result": handler(params)}
    except RpcError as exc:
        if is_notification:
            return None
        return {"jsonrpc": "2.0", "id": request_id, "error": exc.as_json()}


def rpc_request(request_id: int, method: str, **params: Any) -> dict[str, Any]:
    return {
        "jsonrpc": "2.0",
        "id": request_id,
        "method": method,
        "params": {**params, "_meta": request_meta()},
    }


def demo() -> list[dict[str, Any]]:
    transcript: list[dict[str, Any]] = []

View on GitHub (pinned to 39ea8a1c6d)

When it happens

Trigger: Thrown at phases/13-tools-and-protocols/10-mcp-resources-and-prompts/code/main.py:267 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of rohitg00/ai-engineering-from-scratch@39ea8a1c6d (2026-08-26). Data as JSON: /api/errors/a9ca2db8f039a01e. Report an issue: GitHub.