Struct HeaderMismatchError 

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

Latest MCP Protocol 2026_07_28 Returned when a server rejects a request because the values in the HTTP headers do not match the corresponding values in the request body, or because required headers are missing or malformed. For HTTP, the response status code MUST be 400 Bad Request.

JSON schema

{
 "description": "Returned when a server rejects a request because the values in the HTTP\nheaders do not match the corresponding values in the request body, or\nbecause required headers are missing or malformed. For HTTP, the response\nstatus code MUST be 400 Bad Request.",
 "type": "object",
 "required": [
   "error",
   "jsonrpc"
 ],
 "properties": {
   "error": {
     "allOf": [
       {
         "$ref": "#/$defs/Error"
       },
       {
         "type": "object",
         "required": [
           "code"
         ],
         "properties": {
           "code": {
             "type": "integer"
           }
         }
       }
     ]
   },
   "id": {
     "$ref": "#/$defs/RequestId"
   },
   "jsonrpc": {
     "type": "string",
     "const": "2.0"
   }
 }
}

Fields

error: RpcError

id: Option<RequestId>

Implementations

impl HeaderMismatchError

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

pub fn jsonrpc(&self) -> &String

Trait Implementations

impl Clone for HeaderMismatchError

fn clone(&self) -> HeaderMismatchError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HeaderMismatchError

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for HeaderMismatchError

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for HeaderMismatchError

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

where __S: Serializer,

Serialize this value into the given Serde serializer.