Enum ClientError 

pub enum ClientError {
    Transport(String),
    Protocol(String),
    ServerError {
        code: i32,
        message: String,
        data: Option<Value>,
    },
    Timeout(Duration),
    NotInitialized,
    IdMismatch {
        expected: String,
        actual: String,
    },
    ChannelClosed(String),
    Serialization(Error),
}

Errors that can occur during MCP client operations

Variants

Transport(String)

Transport-level errors (I/O, connection)

Protocol(String)

Protocol errors (invalid JSON-RPC, parse errors)

ServerError

Server returned an error response

Fields

code: i32

Error code from server

message: String

Error message from server

data: Option<Value>

Optional additional data

Timeout(Duration)

Request timed out

NotInitialized

Client not initialized (must call initialize first)

IdMismatch

Response ID mismatch

Fields

expected: String

Expected request ID

actual: String

Actual response ID

ChannelClosed(String)

Channel closed unexpectedly

Serialization(Error)

Serialization/deserialization error

Implementations

impl ClientError

pub fn transport(msg: impl Into<String>) -> Self

Create a transport error

pub fn protocol(msg: impl Into<String>) -> Self

Create a protocol error

pub fn from_protocol_error(err: ProtocolError) -> Self

Create from a protocol error response

pub fn is_retryable(&self) -> bool

Check if this is a retryable error

Trait Implementations

impl Debug for ClientError

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

Formats the value using the given formatter.

impl Display for ClientError

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

Formats the value using the given formatter.

impl Error for ClientError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Error> for ClientError

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Error> for ClientError

fn from(err: Error) -> Self

Converts to this type from the input type.