pub struct McpServer { /* private fields */ }Expand description
MCP server that exposes every mcp_exposed Command as an
MCP tool over the supplied Transport.
Construction walks BUILTIN_COMMANDS eagerly: the tool registry
is built once at new() time, so subsequent tools/list and
tools/call requests are pure dispatch. Each entry retains a
pointer to its BUILTIN_COMMANDS factory (rather than a
long-lived Box<dyn Command>) so Command::run always sees a
fresh instance — this matches the per-invocation lifecycle of
CLI execution and avoids trait-object lifetime entanglement
across the tools/call await boundary.
Implementations§
Source§impl McpServer
impl McpServer
Sourcepub fn new(app: App, transport: Transport) -> Self
pub fn new(app: App, transport: Transport) -> Self
Build a new server. Walks BUILTIN_COMMANDS eagerly,
filters by Command::mcp_exposed, and freezes the
registry. The transport choice is honoured by Self::serve.
Sourcepub fn tool_count(&self) -> usize
pub fn tool_count(&self) -> usize
Number of registered MCP tools.
Sourcepub fn tool_manifest(&self) -> impl Iterator<Item = (&str, &str, Value)> + '_
pub fn tool_manifest(&self) -> impl Iterator<Item = (&str, &str, Value)> + '_
Iterator over (name, about, schema) triples for every
registered tool — used by mcp list to print the manifest.
Sourcepub async fn dispatch(&self, name: &str) -> Result<()>
pub async fn dispatch(&self, name: &str) -> Result<()>
Run the same dispatch logic that backs tools/call. Returns
Ok(()) when the named tool’s Command::run succeeded,
Err(McpError::Command) when it ran but failed, and
Err(McpError::Protocol) when no tool with the given name
is registered.
This bypass exists for unit testing — the rmcp service loop
reaches the same logic via ServerHandler::call_tool.
§Errors
See variants above.
Sourcepub async fn serve(self) -> Result<()>
pub async fn serve(self) -> Result<()>
Run the server until the supplied transport closes or the
app.shutdown token fires.
§Errors
Returns McpError::Transport on bind / accept failure or
when an unsupported transport variant is selected.
Sourcepub async fn serve_with_pipe<R, W>(self, read: R, write: W) -> Result<()>
pub async fn serve_with_pipe<R, W>(self, read: R, write: W) -> Result<()>
Run the rmcp service against a caller-supplied AsyncRead +
AsyncWrite pair. The stdio transport delegates here; tests
pass a tokio::io::duplex half so they don’t have to take
over the process’s real stdin/stdout.
§Errors
McpError::Transport if rmcp fails to bring the service
up or the underlying transport surfaces an error.
Auto Trait Implementations§
impl !RefUnwindSafe for McpServer
impl !UnwindSafe for McpServer
impl Freeze for McpServer
impl Send for McpServer
impl Sync for McpServer
impl Unpin for McpServer
impl UnsafeUnpin for McpServer
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