Module protocol 

JSON-RPC 2.0 message types used by MCP.

Re-exports

use serde::Deserialize; 🔒

use serde::Deserialize; 🔒

use serde::Serialize; 🔒

use serde::Serialize; 🔒

use serde_json::Value; 🔒

Structs

JsonRpcRequest

A JSON-RPC request from the claude binary.

JsonRpcResponse

A JSON-RPC response from the MCP server back to the claude binary. Outbound only - we construct these, never parse them.

McpError

Standard MCP error body.

ServerInfo

Server metadata in initialize response.

ToolDescription

A tool as described in the tools/list response.

Enums

JsonRpcResult

Typed successful-response payload. Outbound only, like its envelope: a Deserialize here would make the fieldless Empty match any object, so every unrecognised result would parse successfully rather than erroring.

Constants

LATEST_PROTOCOL_VERSION

Answered when the client asks for a revision we do not speak.

SUPPORTED_PROTOCOL_VERSIONS

MCP protocol revisions this server speaks, newest first.