HTTP 416 Range Not Satisfiable

The Range header asks for bytes that do not exist — typically an offset past the end of the resource.

Why you would test it

The edge case of resumable transfers. A client that resumes from a stale offset lands here, and should restart rather than retry.

Endpoints that return 416

1 endpoint in this playground answers with 416. Every one is free, needs no signup, and can be called from the browser or with curl.

Other client error codes

All HTTP status codes · All 37 mock REST APIs · Getting started guide