Struct MethodNotFoundError 

pub struct MethodNotFoundError {
    pub code: i64,
    pub data: Option<Value>,
    pub message: String,
}

A JSON-RPC error indicating that the requested method does not exist or is not available.

In MCP, a server returns this error when a client invokes a method the server does not implement — either a genuinely unknown method, or one gated behind a server capability the server did not advertise (e.g., calling prompts/list when the prompts capability was not advertised).

A request that requires a client capability the client did not declare is signalled instead by MissingRequiredClientCapabilityError (-32021).

Fields

code: i64

The error type that occurred.

data: Option<Value>

Additional information about the error. The value of this member is defined by the sender (e.g. detailed error information, nested errors etc.).

message: String

A short description of the error. The message SHOULD be limited to a concise single sentence.

Implementations

impl MethodNotFoundError

pub fn new(code: i64, message: String) -> MethodNotFoundError

Creates a value from its required fields; optional fields are None.

Trait Implementations

impl Clone for MethodNotFoundError

fn clone(&self) -> MethodNotFoundError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MethodNotFoundError

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MethodNotFoundError

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for MethodNotFoundError

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for MethodNotFoundError

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 StructuralPartialEq for MethodNotFoundError