Struct DiscoverRequest 

pub struct DiscoverRequest {
    pub id: RequestId,
    pub params: RequestParams,
    /* private fields */
}

Latest MCP Protocol 2026_07_28 A request from the client asking the server to advertise its supported protocol versions, capabilities, and other metadata. Servers MUST implement server/discover. Clients MAY call it but are not required to — version negotiation can also happen inline via per-request _meta.

JSON schema

{
 "description": "A request from the client asking the server to advertise its supported\nprotocol versions, capabilities, and other metadata. Servers **MUST**\nimplement server/discover. Clients **MAY** call it but are not required\nto — version negotiation can also happen inline via per-request _meta.",
 "type": "object",
 "required": [
   "id",
   "jsonrpc",
   "method",
   "params"
 ],
 "properties": {
   "id": {
     "$ref": "#/$defs/RequestId"
   },
   "jsonrpc": {
     "type": "string",
     "const": "2.0"
   },
   "method": {
     "type": "string",
     "const": "server/discover"
   },
   "params": {
     "$ref": "#/$defs/RequestParams"
   }
 }
}

Fields

id: RequestId

params: RequestParams

Implementations

impl DiscoverRequest

pub fn new(id: RequestId, params: RequestParams) -> Self

pub fn jsonrpc(&self) -> &String

pub fn method(&self) -> &String

pub fn method_value() -> &'static str

returns “server/discover”

pub fn method_name() -> &'static str

👎Deprecated since 0.8.0:

Use method_value() instead.

Trait Implementations

impl Clone for DiscoverRequest

fn clone(&self) -> DiscoverRequest

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DiscoverRequest

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DiscoverRequest

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<DiscoverRequest> for ClientRequest

fn from(value: DiscoverRequest) -> Self

Converts to this type from the input type.

impl From<DiscoverRequest> for ClientJsonrpcRequest

fn from(value: DiscoverRequest) -> Self

Converts to this type from the input type.

impl Serialize for DiscoverRequest

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

where __S: Serializer,

Serialize this value into the given Serde serializer.