Enum McpProtocolVersion 

pub enum McpProtocolVersion {
    V2024_11_05,
    V2025_03_26,
    V2025_06_18,
}

Supported MCP protocol versions and features

Variants

V2024_11_05

Original protocol without streamable HTTP (introduced 2024-11-05)

V2025_03_26

Protocol including streamable HTTP (introduced 2025-03-26)

V2025_06_18

Protocol with structured _meta, cursor, progressToken, and elicitation (introduced 2025-06-18)

Implementations

impl McpProtocolVersion

pub const LATEST: McpProtocolVersion = McpProtocolVersion::V2025_06_18

The latest protocol version this server implements.

pub fn from_str(s: &str) -> Option<Self>

Parses a version string like “2024-11-05”, “2025-03-26”, or “2025-06-18”.

pub fn to_string(&self) -> &'static str

Converts this version to its string representation.

pub fn supports_streamable_http(&self) -> bool

Returns whether this version supports streamable HTTP (SSE).

pub fn supports_meta_fields(&self) -> bool

Returns whether this version supports _meta fields in requests, responses, and notifications.

pub fn supports_progress_and_cursor(&self) -> bool

Returns whether this version supports the use of progressToken and cursor in _meta.

pub fn supports_elicitation(&self) -> bool

Returns whether this version supports structured user elicitation via JSON Schema.

pub fn supported_features(&self) -> Vec<&'static str>

Get a list of supported features for this protocol version

Trait Implementations

impl Clone for McpProtocolVersion

fn clone(&self) -> McpProtocolVersion

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for McpProtocolVersion

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

Formats the value using the given formatter.

impl Default for McpProtocolVersion

fn default() -> Self

Returns the “default value” for a type.

impl Display for McpProtocolVersion

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

Formats the value using the given formatter.

impl PartialEq for McpProtocolVersion

fn eq(&self, other: &McpProtocolVersion) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for McpProtocolVersion

impl Eq for McpProtocolVersion

impl StructuralPartialEq for McpProtocolVersion