Cargo Features Selection

Server Only

[dependencies]
rust-mcp-sdk = { version = "1.0", default-features = false, features = ["server", "macros", "stdio", "streamable-http"] }

Client Only

[dependencies]
rust-mcp-sdk = { version = "1.0", default-features = false, features = ["client", "stdio"] }

Minimal HTTP Server

[dependencies]
rust-mcp-sdk = { version = "1.0", default-features = false, features = ["server", "macros"] }
rust-mcp-axum = "1.0"

Features Reference

Feature	Transitive Dependencies
server	Core MCP types, handler traits
client	Core MCP types, handler traits
macros	rust-mcp-macros proc macros
stdio	Stdio transport
streamable-http	HTTP transport types
sse	SSE transport types
auth	OAuth provider traits, DCR, PKCE

Note that the HTTP backend crates define their own features - for example, rust-mcp-axum provides ssl (TLS with rustls crypto provider) and tls-no-provider (TLS without a installed crypto provider).

Release Build

cargo build --release

Use --release for production builds. The release binary is significantly smaller and faster.