Struct StatelessConfig 

pub struct StatelessConfig {
    pub require_protocol_version: bool,
    pub optional_sessions: bool,
    pub enable_discover: bool,
}

Configuration for the legacy SEP-1442 stateless opt-in path.

This configuration applies only to the legacy SEP-1442 opt-in path. It does NOT control the automatic version-gated path for 2026-07-28+ clients: when the stateless feature is compiled in, any request with MCP-Protocol-Version: 2026-07-28 and no mcp-session-id is dispatched statelessly regardless of whether this config is set on the transport.

Use HttpTransport::stateless() to attach this configuration to a transport. Omitting it does not disable stateless support for 2026-07-28+ clients; it only disables the additional SEP-1442 opt-in behaviors below.

Fields

require_protocol_version: bool

Whether to require protocol version in every request.

Default: true (as per SEP-1442)

optional_sessions: bool

Whether sessions are optional.

When true, requests without session IDs are allowed and the initialize handshake is not required.

Default: true

enable_discover: bool

Whether to enable the server/discover RPC.

Default: true

Implementations

impl StatelessConfig

pub fn new() -> Self

Create a new stateless configuration with SEP-1442 defaults.

pub fn backward_compatible() -> Self

Create a configuration that maintains backward compatibility.

This enables stateless features but doesn’t require them, allowing gradual migration from stateful to stateless.

Trait Implementations

impl Clone for StatelessConfig

fn clone(&self) -> StatelessConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StatelessConfig

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

Formats the value using the given formatter.

impl Default for StatelessConfig

fn default() -> Self

Returns the “default value” for a type.