Enum ClaudeApiError 

pub enum ClaudeApiError {
    InvalidRequest {
        message: String,
    },
    AuthenticationError {
        message: String,
    },
    PermissionDenied {
        message: String,
    },
    NotFound {
        message: String,
    },
    RequestTooLarge {
        message: String,
    },
    RateLimited {
        message: String,
    },
    InternalError {
        message: String,
    },
    Overloaded {
        message: String,
    },
    Network(Error),
    JsonParse(Error),
    StreamError {
        message: String,
    },
    Unknown {
        status: u16,
        message: String,
    },
}

Every error the Claude Messages API can return, plus network/parse errors.

Example

match err {
    ClaudeApiError::RateLimited { message } => { /* back off and retry */ }
    ClaudeApiError::InvalidRequest { message } => { /* fix request */ }
    _ => { /* log and bail */ }
}

Variants

InvalidRequest

400 - Malformed JSON, missing params, invalid values

Fields

message: String

AuthenticationError

401 - Missing or invalid API key

Fields

message: String

PermissionDenied

403 - API key lacks permission for the requested model/feature

Fields

message: String

NotFound

404 - Bad endpoint or invalid model ID

Fields

message: String

RequestTooLarge

413 - Request body too large (too many tokens, huge images, etc.)

Fields

message: String

RateLimited

429 - Rate limited (retryable - check retry-after header)

Fields

message: String

InternalError

500 - Anthropic server issue (retryable)

Fields

message: String

Overloaded

529 - API overloaded (retryable)

Fields

message: String

Network(Error)

Network-level failure (DNS, TLS, connection refused, etc.)

JsonParse(Error)

Failed to parse the API response JSON

StreamError

SSE stream delivered an error event or broke mid-stream

Fields

message: String

Unknown

Catch-all for unexpected HTTP status codes

Fields

status: u16

message: String

Implementations

impl ClaudeApiError

pub fn is_retryable(&self) -> bool

Returns true if the error is safe to retry with backoff.

impl ClaudeApiError

pub fn from_response(status: u16, body: &str) -> Self

Parse an API error from the HTTP status code and response body text.

Tries to deserialize the structured error JSON first; falls back to using the raw body text if parsing fails.

Trait Implementations

impl Debug for ClaudeApiError

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

Formats the value using the given formatter.

impl Display for ClaudeApiError

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

Formats the value using the given formatter.

impl Error for ClaudeApiError

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 ClaudeApiError

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Error> for ClaudeApiError

fn from(source: Error) -> Self

Converts to this type from the input type.