rust-mcp-stack/rust-mcp-schema

Add rust-mcp-schema = { version = "0.10.3" } to Cargo.toml
Enable a specific version feature: rust-mcp-schema = { version = "0.10.3", default-features = false, features = ["2025_06_18"] }

Usage

• •Deserialize incoming MCP messages with ClientMessage::from_str on a server
• •Create InitializeResult responses with ServerJsonrpcResponse::new and serialize with serde_json
• •Detect InitializeRequest/InitializeResult variants via pattern matching
• •Optionally skip schema_utils and work directly with JsonrpcMessage types

Key features

• ✓Type-safe implementation of the MCP protocol schema with serde_json serialization/deserialization
• ✓All official protocol versions included: 2025-11-25, 2025-06-18, 2025-03-26, 2024-11-05 and draft
• ✓Auto-generated schemas synchronized with the official Model Context Protocol specification
• ✓schema_utils module splitting JsonrpcMessage into ClientMessage and ServerMessage for stronger typing

Best for

Rust developers building MCP servers or clients with compile-time protocol type safety.

Caveats

• ⚠Provides the schema implementation only; for server/client tooling use the companion rust-mcp-sdk crate
• ⚠The code used to generate schemas is not included in the repository