Struct Request 

#[non_exhaustive]
pub struct Request<M = String, P = Map<String, Value>> {
    pub method: M,
    pub params: P,
    pub extensions: Extensions,
}

Available on crate features mcp and tools only.

Represents a JSON-RPC request with method, parameters, and extensions.

This is the core structure for all MCP requests, containing:

• method: The name of the method being called
• params: The parameters for the method
• extensions: Additional context data (similar to HTTP headers)

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

method: M

params: P

extensions: Extensions

extensions will carry anything possible in the context, including the metadata (RequestMetaObject for requests, NotificationMetaObject for notifications)

this is similar with the Extensions in http crate

Implementations

impl<M, P> Request<M, P>

where M: Default,

pub fn new(params: P) -> Request<M, P>

Trait Implementations

impl<M, P> Clone for Request<M, P>

where M: Clone, P: Clone,

fn clone(&self) -> Request<M, P>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<M, P> Debug for Request<M, P>

where M: Debug, P: Debug,

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

Formats the value using the given formatter.

impl<M, P> Default for Request<M, P>

where M: Default, P: Default,

fn default() -> Request<M, P>

Returns the “default value” for a type.

impl<'de, M, R> Deserialize<'de> for Request<M, R>

where M: Deserialize<'de>, R: Deserialize<'de>,

fn deserialize<D>( deserializer: D, ) -> Result<Request<M, R>, <D as Deserializer<'de>>::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<Request<CallToolRequestMethod, CallToolRequestParams>> for ClientRequest

fn from( value: Request<CallToolRequestMethod, CallToolRequestParams>, ) -> ClientRequest

Converts to this type from the input type.

impl From<Request<CancelTaskMethod, CancelTaskParams>> for ClientRequest

fn from(value: Request<CancelTaskMethod, CancelTaskParams>) -> ClientRequest

Converts to this type from the input type.

impl From<Request<CompleteRequestMethod, CompleteRequestParams>> for ClientRequest

fn from( value: Request<CompleteRequestMethod, CompleteRequestParams>, ) -> ClientRequest

Converts to this type from the input type.

impl From<Request<CreateMessageRequestMethod, CreateMessageRequestParams>> for ServerRequest

fn from( value: Request<CreateMessageRequestMethod, CreateMessageRequestParams>, ) -> ServerRequest

Converts to this type from the input type.

impl From<Request<DiscoverRequestMethod, DiscoverRequestParams>> for ClientRequest

fn from( value: Request<DiscoverRequestMethod, DiscoverRequestParams>, ) -> ClientRequest

Converts to this type from the input type.

impl From<Request<ElicitationCreateRequestMethod, ElicitRequestParams>> for ServerRequest

fn from( value: Request<ElicitationCreateRequestMethod, ElicitRequestParams>, ) -> ServerRequest

Converts to this type from the input type.

impl From<Request<GetPromptRequestMethod, GetPromptRequestParams>> for ClientRequest

fn from( value: Request<GetPromptRequestMethod, GetPromptRequestParams>, ) -> ClientRequest

Converts to this type from the input type.

impl From<Request<GetTaskMethod, GetTaskParams>> for ClientRequest

fn from(value: Request<GetTaskMethod, GetTaskParams>) -> ClientRequest

Converts to this type from the input type.

impl From<Request<InitializeResultMethod, InitializeRequestParams>> for ClientRequest

fn from( value: Request<InitializeResultMethod, InitializeRequestParams>, ) -> ClientRequest

Converts to this type from the input type.

impl From<Request<ReadResourceRequestMethod, ReadResourceRequestParams>> for ClientRequest

fn from( value: Request<ReadResourceRequestMethod, ReadResourceRequestParams>, ) -> ClientRequest

Converts to this type from the input type.

impl From<Request<SetLevelRequestMethod, SetLevelRequestParams>> for ClientRequest

fn from( value: Request<SetLevelRequestMethod, SetLevelRequestParams>, ) -> ClientRequest

Converts to this type from the input type.

impl From<Request<SubscribeRequestMethod, SubscribeRequestParams>> for ClientRequest

fn from( value: Request<SubscribeRequestMethod, SubscribeRequestParams>, ) -> ClientRequest

Converts to this type from the input type.

impl From<Request<SubscriptionsListenRequestMethod, SubscriptionsListenRequestParams>> for ClientRequest

fn from( value: Request<SubscriptionsListenRequestMethod, SubscriptionsListenRequestParams>, ) -> ClientRequest

Converts to this type from the input type.

impl From<Request<UnsubscribeRequestMethod, UnsubscribeRequestParams>> for ClientRequest

fn from( value: Request<UnsubscribeRequestMethod, UnsubscribeRequestParams>, ) -> ClientRequest

Converts to this type from the input type.

impl From<Request<UpdateTaskMethod, UpdateTaskParams>> for ClientRequest

fn from(value: Request<UpdateTaskMethod, UpdateTaskParams>) -> ClientRequest

Converts to this type from the input type.

impl<M, P> GetExtensions for Request<M, P>

fn extensions(&self) -> &Extensions

fn extensions_mut(&mut self) -> &mut Extensions

impl<M, P> JsonSchema for Request<M, P>

where M: JsonSchema, P: JsonSchema,

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl<M, R> Serialize for Request<M, R>

where M: Serialize, R: Serialize,

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.