HTTP 401 Unauthorized

Authentication is missing or invalid. Despite the name, this is about identity, not permission — the server does not know who you are.

Why you would test it

Test the missing-header case and the invalid-token case separately. They are different bugs and they fail in different places.

Endpoints that return 401

82 endpoints in this playground answer with 401. Every one is free, needs no signup, and can be called from the browser or with curl.

• POST https://funapi.dev/api/friends/v1/characters — Missing or invalid token (Friends API)
• POST https://funapi.dev/api/friends/v1/characters/bulk — Missing or invalid token (Friends API)
• PUT https://funapi.dev/api/friends/v1/characters/{id} — Missing or invalid token (Friends API)
• POST https://funapi.dev/api/friends/v1/characters/bulk-delete — Missing or invalid token (Friends API)
• DELETE https://funapi.dev/api/friends/v1/characters/{id} — Missing or invalid token (Friends API)
• POST https://funapi.dev/api/superheroes/v1/heroes — Missing or invalid token (Superhero API)
• DELETE https://funapi.dev/api/superheroes/v1/heroes/{id} — Missing or invalid token (Superhero API)
• POST https://funapi.dev/api/superheroes/v1/heroes/versus — Missing or invalid token (Superhero API)
• PUT https://funapi.dev/api/pizza/v1/orders/{id}/status — Missing or invalid token (Pizza Orders API)
• POST https://funapi.dev/api/football/v1/matches — Missing or invalid token (Football API)
• DELETE https://funapi.dev/api/football/v1/teams/{id} — Missing or invalid token (Football API)
• POST https://funapi.dev/api/movies/v1/movies — Missing or invalid token (Movies API)
• PUT https://funapi.dev/api/movies/v1/movies/{id}/rating — Missing or invalid token (Movies API)
• DELETE https://funapi.dev/api/movies/v1/movies/{id} — Missing or invalid token (Movies API)
• POST https://funapi.dev/api/movies/v1/movies/{id}/poster — Missing or invalid token (Movies API)
• POST https://funapi.dev/api/wizarding/v1/students — Missing or invalid token (Harry Potter API)
• PUT https://funapi.dev/api/wizarding/v1/students/{id} — Missing or invalid token (Harry Potter API)
• DELETE https://funapi.dev/api/wizarding/v1/students/{id} — Missing or invalid token (Harry Potter API)
• POST https://funapi.dev/api/galaxy/v1/characters — Missing or invalid token (Star Wars API)
• PUT https://funapi.dev/api/galaxy/v1/characters/{id} — Missing or invalid token (Star Wars API)
• DELETE https://funapi.dev/api/galaxy/v1/characters/{id} — Missing or invalid token (Star Wars API)
• POST https://funapi.dev/api/holmes/v1/suspects — Missing or invalid token (Sherlock Holmes API)
• PUT https://funapi.dev/api/holmes/v1/suspects/{id} — Missing or invalid token (Sherlock Holmes API)
• DELETE https://funapi.dev/api/holmes/v1/suspects/{id} — Missing or invalid token (Sherlock Holmes API)
• PATCH https://funapi.dev/api/holmes/v1/cases/{id} — Missing or invalid token (Sherlock Holmes API)

…and 57 more endpoints across the catalog.

Other client error codes

• 400 Bad Request
• 402 Payment Required
• 403 Forbidden
• 404 Not Found
• 405 Method Not Allowed
• 406 Not Acceptable
• 409 Conflict
• 410 Gone

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