Struct MissingRequiredClientCapabilityError 

pub struct MissingRequiredClientCapabilityError {
    pub error: MissingRequiredClientCapabilityErrorError,
    pub id: Option<RequestId>,
    /* private fields */
}

Latest MCP Protocol 2026_07_28 Returned when processing a request requires a capability the client did not declare in clientCapabilities. For HTTP, the response status code MUST be 400 Bad Request.

JSON schema

{
 "description": "Returned when processing a request requires a capability the client did not\ndeclare in clientCapabilities. For HTTP, the response status code MUST be\n400 Bad Request.",
 "type": "object",
 "required": [
   "error",
   "jsonrpc"
 ],
 "properties": {
   "error": {
     "allOf": [
       {
         "$ref": "#/$defs/Error"
       },
       {
         "type": "object",
         "required": [
           "code",
           "data"
         ],
         "properties": {
           "code": {
             "type": "integer"
           },
           "data": {
             "type": "object",
             "required": [
               "requiredCapabilities"
             ],
             "properties": {
               "requiredCapabilities": {
                 "description": "The capabilities the server requires from the client to process this request.",
                 "$ref": "#/$defs/ClientCapabilities"
               }
             }
           }
         }
       }
     ]
   },
   "id": {
     "$ref": "#/$defs/RequestId"
   },
   "jsonrpc": {
     "type": "string",
     "const": "2.0"
   }
 }
}

Fields

error: MissingRequiredClientCapabilityErrorError

id: Option<RequestId>

Implementations

impl MissingRequiredClientCapabilityError

pub fn new( error: MissingRequiredClientCapabilityErrorError, id: Option<RequestId>, ) -> Self

pub fn jsonrpc(&self) -> &String

Trait Implementations

impl Clone for MissingRequiredClientCapabilityError

fn clone(&self) -> MissingRequiredClientCapabilityError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MissingRequiredClientCapabilityError

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MissingRequiredClientCapabilityError

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<MissingRequiredClientCapabilityError> for RpcError

fn from(value: MissingRequiredClientCapabilityError) -> Self

Converts to this type from the input type.

impl Serialize for MissingRequiredClientCapabilityError

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

where __S: Serializer,

Serialize this value into the given Serde serializer.