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Status Codes

You can import the status module from fastapi:

from fastapi import status

status is provided directly by Starlette.

It contains a group of named constants (variables) with integer status codes.

For example:

  • 200: status.HTTP_200_OK
  • 403: status.HTTP_403_FORBIDDEN
  • etc.

It can be convenient to quickly access HTTP (and WebSocket) status codes in your app, using autocompletion for the name without having to remember the integer status codes by memory.

Read more about it in the FastAPI docs about Response Status Code.

Example

from fastapi import FastAPI, status

app = FastAPI()


@app.get("/items/", status_code=status.HTTP_418_IM_A_TEAPOT)
def read_items():
    return [{"name": "Plumbus"}, {"name": "Portal Gun"}]

fastapi.status

HTTP codes See HTTP Status Code Registry: https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml

And RFC 9110 - https://www.rfc-editor.org/rfc/rfc9110

HTTP_100_CONTINUE module-attribute 

HTTP_100_CONTINUE = 100

HTTP_101_SWITCHING_PROTOCOLS module-attribute 

HTTP_101_SWITCHING_PROTOCOLS = 101

HTTP_102_PROCESSING module-attribute 

HTTP_102_PROCESSING = 102

HTTP_103_EARLY_HINTS module-attribute 

HTTP_103_EARLY_HINTS = 103

HTTP_200_OK module-attribute 

HTTP_200_OK = 200

HTTP_201_CREATED module-attribute 

HTTP_201_CREATED = 201

HTTP_202_ACCEPTED module-attribute 

HTTP_202_ACCEPTED = 202

HTTP_203_NON_AUTHORITATIVE_INFORMATION module-attribute 

HTTP_203_NON_AUTHORITATIVE_INFORMATION = 203

HTTP_204_NO_CONTENT module-attribute 

HTTP_204_NO_CONTENT = 204

HTTP_205_RESET_CONTENT module-attribute 

HTTP_205_RESET_CONTENT = 205

HTTP_206_PARTIAL_CONTENT module-attribute 

HTTP_206_PARTIAL_CONTENT = 206

HTTP_207_MULTI_STATUS module-attribute 

HTTP_207_MULTI_STATUS = 207

HTTP_208_ALREADY_REPORTED module-attribute 

HTTP_208_ALREADY_REPORTED = 208

HTTP_226_IM_USED module-attribute 

HTTP_226_IM_USED = 226

HTTP_300_MULTIPLE_CHOICES module-attribute 

HTTP_300_MULTIPLE_CHOICES = 300

HTTP_301_MOVED_PERMANENTLY module-attribute 

HTTP_301_MOVED_PERMANENTLY = 301

HTTP_302_FOUND module-attribute 

HTTP_302_FOUND = 302

HTTP_303_SEE_OTHER module-attribute 

HTTP_303_SEE_OTHER = 303

HTTP_304_NOT_MODIFIED module-attribute 

HTTP_304_NOT_MODIFIED = 304

HTTP_305_USE_PROXY module-attribute 

HTTP_305_USE_PROXY = 305

HTTP_306_RESERVED module-attribute 

HTTP_306_RESERVED = 306

HTTP_307_TEMPORARY_REDIRECT module-attribute 

HTTP_307_TEMPORARY_REDIRECT = 307

HTTP_308_PERMANENT_REDIRECT module-attribute 

HTTP_308_PERMANENT_REDIRECT = 308

HTTP_400_BAD_REQUEST module-attribute 

HTTP_400_BAD_REQUEST = 400

HTTP_401_UNAUTHORIZED module-attribute 

HTTP_401_UNAUTHORIZED = 401

HTTP_402_PAYMENT_REQUIRED module-attribute 

HTTP_402_PAYMENT_REQUIRED = 402

HTTP_403_FORBIDDEN module-attribute 

HTTP_403_FORBIDDEN = 403

HTTP_404_NOT_FOUND module-attribute 

HTTP_404_NOT_FOUND = 404

HTTP_405_METHOD_NOT_ALLOWED module-attribute 

HTTP_405_METHOD_NOT_ALLOWED = 405

HTTP_406_NOT_ACCEPTABLE module-attribute 

HTTP_406_NOT_ACCEPTABLE = 406

HTTP_407_PROXY_AUTHENTICATION_REQUIRED module-attribute 

HTTP_407_PROXY_AUTHENTICATION_REQUIRED = 407

HTTP_408_REQUEST_TIMEOUT module-attribute 

HTTP_408_REQUEST_TIMEOUT = 408

HTTP_409_CONFLICT module-attribute 

HTTP_409_CONFLICT = 409

HTTP_410_GONE module-attribute 

HTTP_410_GONE = 410

HTTP_411_LENGTH_REQUIRED module-attribute 

HTTP_411_LENGTH_REQUIRED = 411

HTTP_412_PRECONDITION_FAILED module-attribute 

HTTP_412_PRECONDITION_FAILED = 412

HTTP_413_CONTENT_TOO_LARGE module-attribute 

HTTP_413_CONTENT_TOO_LARGE = 413

HTTP_414_URI_TOO_LONG module-attribute 

HTTP_414_URI_TOO_LONG = 414

HTTP_415_UNSUPPORTED_MEDIA_TYPE module-attribute 

HTTP_415_UNSUPPORTED_MEDIA_TYPE = 415

HTTP_416_RANGE_NOT_SATISFIABLE module-attribute 

HTTP_416_RANGE_NOT_SATISFIABLE = 416

HTTP_417_EXPECTATION_FAILED module-attribute 

HTTP_417_EXPECTATION_FAILED = 417

HTTP_418_IM_A_TEAPOT module-attribute 

HTTP_418_IM_A_TEAPOT = 418

HTTP_421_MISDIRECTED_REQUEST module-attribute 

HTTP_421_MISDIRECTED_REQUEST = 421

HTTP_422_UNPROCESSABLE_CONTENT module-attribute 

HTTP_422_UNPROCESSABLE_CONTENT = 422

HTTP_423_LOCKED module-attribute 

HTTP_423_LOCKED = 423

HTTP_424_FAILED_DEPENDENCY module-attribute 

HTTP_424_FAILED_DEPENDENCY = 424

HTTP_425_TOO_EARLY module-attribute 

HTTP_425_TOO_EARLY = 425

HTTP_426_UPGRADE_REQUIRED module-attribute 

HTTP_426_UPGRADE_REQUIRED = 426

HTTP_428_PRECONDITION_REQUIRED module-attribute 

HTTP_428_PRECONDITION_REQUIRED = 428

HTTP_429_TOO_MANY_REQUESTS module-attribute 

HTTP_429_TOO_MANY_REQUESTS = 429

HTTP_431_REQUEST_HEADER_FIELDS_TOO_LARGE module-attribute 

HTTP_431_REQUEST_HEADER_FIELDS_TOO_LARGE = 431

HTTP_451_UNAVAILABLE_FOR_LEGAL_REASONS = 451

HTTP_500_INTERNAL_SERVER_ERROR module-attribute 

HTTP_500_INTERNAL_SERVER_ERROR = 500

HTTP_501_NOT_IMPLEMENTED module-attribute 

HTTP_501_NOT_IMPLEMENTED = 501

HTTP_502_BAD_GATEWAY module-attribute 

HTTP_502_BAD_GATEWAY = 502

HTTP_503_SERVICE_UNAVAILABLE module-attribute 

HTTP_503_SERVICE_UNAVAILABLE = 503

HTTP_504_GATEWAY_TIMEOUT module-attribute 

HTTP_504_GATEWAY_TIMEOUT = 504

HTTP_505_HTTP_VERSION_NOT_SUPPORTED module-attribute 

HTTP_505_HTTP_VERSION_NOT_SUPPORTED = 505

HTTP_506_VARIANT_ALSO_NEGOTIATES module-attribute 

HTTP_506_VARIANT_ALSO_NEGOTIATES = 506

HTTP_507_INSUFFICIENT_STORAGE module-attribute 

HTTP_507_INSUFFICIENT_STORAGE = 507

HTTP_508_LOOP_DETECTED module-attribute 

HTTP_508_LOOP_DETECTED = 508

HTTP_510_NOT_EXTENDED module-attribute 

HTTP_510_NOT_EXTENDED = 510

HTTP_511_NETWORK_AUTHENTICATION_REQUIRED module-attribute 

HTTP_511_NETWORK_AUTHENTICATION_REQUIRED = 511

WebSocket codes https://www.iana.org/assignments/websocket/websocket.xml#close-code-number https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent

WS_1000_NORMAL_CLOSURE module-attribute 

WS_1000_NORMAL_CLOSURE = 1000

WS_1001_GOING_AWAY module-attribute 

WS_1001_GOING_AWAY = 1001

WS_1002_PROTOCOL_ERROR module-attribute 

WS_1002_PROTOCOL_ERROR = 1002

WS_1003_UNSUPPORTED_DATA module-attribute 

WS_1003_UNSUPPORTED_DATA = 1003

WS_1005_NO_STATUS_RCVD module-attribute 

WS_1005_NO_STATUS_RCVD = 1005

WS_1006_ABNORMAL_CLOSURE module-attribute 

WS_1006_ABNORMAL_CLOSURE = 1006

WS_1007_INVALID_FRAME_PAYLOAD_DATA module-attribute 

WS_1007_INVALID_FRAME_PAYLOAD_DATA = 1007

WS_1008_POLICY_VIOLATION module-attribute 

WS_1008_POLICY_VIOLATION = 1008

WS_1009_MESSAGE_TOO_BIG module-attribute 

WS_1009_MESSAGE_TOO_BIG = 1009

WS_1010_MANDATORY_EXT module-attribute 

WS_1010_MANDATORY_EXT = 1010

WS_1011_INTERNAL_ERROR module-attribute 

WS_1011_INTERNAL_ERROR = 1011

WS_1012_SERVICE_RESTART module-attribute 

WS_1012_SERVICE_RESTART = 1012

WS_1013_TRY_AGAIN_LATER module-attribute 

WS_1013_TRY_AGAIN_LATER = 1013

WS_1014_BAD_GATEWAY module-attribute 

WS_1014_BAD_GATEWAY = 1014

WS_1015_TLS_HANDSHAKE module-attribute 

WS_1015_TLS_HANDSHAKE = 1015