Crate nest_rs_mcp 

MCP transport — #[mcp] mounts tools on the existing HTTP transport.

Unlike HTTP / GraphQL / Queue / Schedule, this crate ships no McpModule and no Transport impl. MCP is not a transport, it is a graft on HttpTransport (the same pattern as WS): #[mcp] on a struct emits an endpoint() factory that mounts under the HTTP server. Apps activate MCP by listing the #[mcp]-decorated provider — no <Transport>Module activation seam to import.

Re-exports

pub use rmcp::schemars;

Structs

AllowAllMcpGuard

Opt-in counterpart to the default deny-all. An MCP endpoint mounted without an McpOperationGuard fails closed (deny-all) — so a genuinely public tool must declare that intent by wiring this guard as dyn McpOperationGuard. It admits every request unchanged; authorization, if any, is left to the tool. Reach for it only when the tool surface is deliberately public (no claims, no row-level data) — never to silence the deny-all on an endpoint that should authenticate.

CallToolResult

The result of a tool call operation.

LocalSessionManager

McpError

Error information for JSON-RPC error responses.

Parameters

Parameter extractor for tools and prompts

StreamableHttpServerConfig

StreamableHttpService

Streamable HTTP server

ToolRouter

Traits

McpOperationGuard

Authenticates an MCP HTTP request before the streamable handler runs. Bind with providers = [MyBridge as dyn McpOperationGuard].

ServerHandler

Functions

endpoint

factory runs on every new MCP session, so per-session state stays fresh.

endpoint_with_guard

Type Aliases

BoxFuture

Content

Attribute Macros

mcp

Mark a struct as an MCP server handler that self-mounts over HTTP.

tool

tool

tool_handler

tool_handler

tool_router

tool_router