Enum McpVersion 

pub enum McpVersion {
    V2024_11_05,
    V2025_03_26,
    V2025_06_18,
    V2025_11_25,
}

Supported MCP protocol versions

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)

V2025_11_25

Protocol with tasks, icons, URL elicitation, and sampling tools (introduced 2025-11-25)

Implementations

impl McpVersion

pub const LATEST: McpVersion = McpVersion::V2025_11_25

The latest protocol version implemented by this crate

pub const CURRENT: McpVersion = McpVersion::V2025_11_25

The current protocol version implemented by this crate

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

Convert 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 supports_tasks(&self) -> bool

Returns whether this version supports the task system (experimental)

pub fn supports_icons(&self) -> bool

Returns whether this version supports icons on tools, resources, prompts, and implementation

pub fn supports_url_elicitation(&self) -> bool

Returns whether this version supports URL mode elicitation

pub fn supports_sampling_tools(&self) -> bool

Returns whether this version supports tools in sampling requests

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

Get a list of feature names supported by this version

Trait Implementations

impl Clone for McpVersion

fn clone(&self) -> McpVersion

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for McpVersion

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

Formats the value using the given formatter.

impl Default for McpVersion

fn default() -> McpVersion

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for McpVersion

fn deserialize<__D>( __deserializer: __D, ) -> Result<McpVersion, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for McpVersion

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

Formats the value using the given formatter.

impl FromStr for McpVersion

type Err = McpError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<McpVersion, <McpVersion as FromStr>::Err>

Parses a string s to return a value of this type.

impl Hash for McpVersion

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for McpVersion

fn cmp(&self, other: &McpVersion) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for McpVersion

fn eq(&self, other: &McpVersion) -> 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 PartialOrd for McpVersion

fn partial_cmp(&self, other: &McpVersion) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for McpVersion

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for McpVersion

impl Eq for McpVersion

impl StructuralPartialEq for McpVersion