Struct RequestSender 

pub struct RequestSender { /* private fields */ }

Sends server-to-client requests through the transport.

This struct provides a way to send requests to the client and await responses. It works in conjunction with PendingRequests to track in-flight requests.

Implementations

impl RequestSender

pub fn new(pending: Arc<PendingRequests>, send_fn: TransportSendFn) -> Self

Creates an exact MCP 2024-11-05 request sender.

Use Self::new_for_era when the negotiated era is available.

pub fn new_for_era( era: ProtocolEra, pending: Arc<PendingRequests>, send_fn: TransportSendFn, ) -> Self

Creates a request sender bound to one negotiated protocol era.

Dropped reverse requests emit notifications/cancelled only for exact MCP 2024-11-05. MCP 2026-07-28 retains local cleanup but emits no server cancellation notification.

pub async fn send_request<T: DeserializeOwned>( &self, cx: &Cx, method: &str, params: Value, ) -> McpResult<T>

Sends a request to the client and waits for a response.

Errors

Returns an error if:

• The finite in-flight request limit is reached
• The transport send fails
• The request times out (based on budget)
• The client returns an error response
• The response envelope or typed payload is invalid
• The connection is closed

Trait Implementations

impl Clone for RequestSender

fn clone(&self) -> RequestSender

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RequestSender

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.