A JSON-RPC 2.0 message contains the fields {"jsonrpc": "2.0", "method" — MCP Professional Practice — Claude Cert Academy

A JSON-RPC 2.0 message contains the fields {"jsonrpc": "2.0", "method": "notifications/resources/updated", "params": {...}}. What type of message is this and what response is expected?

• A request; the server must respond with a result
• A notification; no response is expected or permitted
• A response; it matches a previous request id
• An error; the error field is missing

Answer: A notification; no response is expected or permitted

A JSON-RPC 2.0 notification is identified by the absence of an id field. Notifications are fire-and-forget: no response is expected, and sending one would violate the protocol. The notifications/ prefix in the method name is a strong hint, but the definitive signal is the missing id.

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