418 I'm a Teapot

418 I'm a Teapot is an April Fools' joke status code defined in RFC 2324 (Hyper Text Coffee Pot Control Protocol, 1998). A server may return this code to indicate that it refuses to brew coffee because it is a teapot. It was meant as a humorous joke and is not intended for use in actual HTTP implementations.

Despite being a joke, it has been adopted by many developers as a catch-all error code, a way to indicate "I refuse this request for reasons not covered by other codes," or simply as an Easter egg. Google, GitHub, and many major platforms return 418 on /teapot endpoints.

IETF considered removing 418 in 2017 but decided to preserve it due to popular demand and its cultural significance in the developer community.

• Developer humor or Easter egg endpoints
• API explicitly refusing a category of requests (informal use)
• Testing error handling in clients
• A real teapot that has been connected to the internet

• If you receive a 418 unexpectedly, check if it's being used informally to mean "forbidden" or "not supported"
• Don't use 418 in production APIs for real error cases — use 400, 403, or 422 instead
• Enjoy the joke — it's a nod to the playful spirit of early internet culture