SEP-2577 deprecates the Roots, Sampling, and Logging features. The deprecation is advisory: the features stay fully functional and there is no wire-level change. Mark the corresponding Rust APIs as deprecated so downstream users get compiler warnings and migration guidance. - Forward attributes through the service `method!` macros and deprecate `Peer::create_message`, `Peer::list_roots`, `Peer::set_level`, and `Peer::notify_logging_message`. - Forward per-field attributes through the capability `builder!` macro and deprecate the generated `enable_roots`, `enable_sampling`, and `enable_logging` builders, plus the hand-written `enable_roots_list_changed`, `enable_sampling_tools`, and `enable_sampling_context`. - Document the deprecation on the capability types and fields, and in the README feature sections. - Allow `deprecated` at the crate's own call sites so the build stays warning-clean, and refresh the message schema snapshots. |
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| clients | ||
| servers | ||
| simple-chat-client | ||
| transport | ||
| wasi | ||
| README.md | ||
Quick Start With Claude Desktop
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Build the Server (Counter Example)
cargo build --release -p mcp-server-examples --example servers_counter_stdioThis builds a standard input/output MCP server binary.
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Add or update this section in your
PATH-TO/claude_desktop_config.jsonWindows
{ "mcpServers": { "counter": { "command": "PATH-TO/rust-sdk/target/release/examples/servers_counter_stdio.exe", "args": [] } } }MacOS/Linux
{ "mcpServers": { "counter": { "command": "PATH-TO/rust-sdk/target/release/examples/servers_counter_stdio", "args": [] } } } -
Ensure that the MCP UI elements appear in Claude Desktop The MCP UI elements will only show up in Claude for Desktop if at least one server is properly configured. It may require to restart Claude for Desktop.
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Once Claude Desktop is running, try chatting:
counter.say_helloOr test other tools like:
counter.increment counter.get_value counter.sum {"a": 3, "b": 4}
Client Examples
Server Examples
Transport Examples
Integration
- Rig A stream chatbot with rig
- Simple Chat Client A simple chat client implementation using the Model Context Protocol (MCP) SDK.
WASI
- WASI-P2 runtime How it works with wasip2
Use Mcp Inspector
npx @modelcontextprotocol/inspector