Question

Which data exchange format does the Model Context Protocol mandate for communication between the host and server to ensure structural consistency?

Accepted Answer

The Model Context Protocol mandates the use of JSON-RPC 2.0 as its data exchange format for communication between the host and the server. JSON-RPC 2.0 is a lightweight remote procedure call protocol that relies on JSON, which stands for JavaScript Object Notation, a standard text-based format for representing structured data. By using this specific protocol, the Model Context Protocol ensures that both the host and the server follow a strict, predictable structure for sending requests, receiving responses, and reporting errors. Every message exchanged consists of a JSON object containing specific fields such as jsonrpc to identify the protocol version, method to define the action being performed, params to provide necessary data, and id to link a specific request to its corresponding response. This structural consistency prevents ambiguity, allowing the host and server to reliably understand and process instructions regardless of the underlying programming language or system architecture.

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Which data exchange format does the Model Context Protocol mandate for communication between the host and server to ensure structural consistency?