Struct McpServer 

pub struct McpServer<Counterpart: Role, Run = NullRun> { /* private fields */ }

A runtime-agnostic MCP server.

McpServer wraps an McpServerConnect implementation. A server whose counterpart is role::mcp::Client can be connected directly as a standalone MCP component. With the unstable_mcp_over_acp feature, servers can instead be attached to ACP session setup through Builder::with_mcp_server or SessionBuilder::with_mcp_server. When unstable_protocol_v2 is also enabled, Proxy.v2().with_mcp_server attaches a server globally to draft v2 setup requests. V2SessionBuilder::with_mcp_server attaches one to a single new v2 session, while V2ResumeSessionBuilder::with_mcp_server attaches one to a single resumed session. With unstable_session_fork, V2ForkSessionBuilder::with_mcp_server attaches one to a single forked session.

Creating an MCP Server

The agent-client-protocol-rmcp crate provides builder APIs for MCP tools backed by the rmcp crate.

Or implement McpServerConnect for custom server behavior:

let server = McpServer::new(MyCustomServerConnect, NullRun);

Implementations

impl<Counterpart: Role, Run> McpServer<Counterpart, Run>

where Run: RunWithConnectionTo<Counterpart>,

pub fn new(c: impl McpServerConnect<Counterpart>, runner: Run) -> Self

Create an MCP server from something that implements the McpServerConnect trait.

See also

See agent-client-protocol-rmcp to construct MCP servers from Rust code with rmcp.

Trait Implementations

impl<Run> ConnectTo<Client> for McpServer<Client, Run>

where Run: RunWithConnectionTo<Client> + 'static,

async fn connect_to(self, client: impl ConnectTo<Server>) -> Result<(), Error>

Connect this component to another component.

fn into_channel_and_future(self) -> (Channel, BoxFuture<'static, Result<()>>)

where Self: Sized,

Convert this component into a channel endpoint and connection future.

impl<Counterpart: Role + Debug, Run: Debug> Debug for McpServer<Counterpart, Run>

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

Formats the value using the given formatter.