Client error · HTTP reference

418I'm a teapot

The beloved teapot response from RFC 2324. A playful addition; IANA marks 418 as unused.

“I’m a teapot” is the joke response from RFC 2324. The current IANA registry and RFC 9110 mark 418 as unused.

The company behind the code.

For tea brands and a better brew.

The beloved teapot response from RFC 2324. A playful addition; IANA marks 418 as unused.

Available

Your logo, your message, your corner of the internet.

Returns this HTTP status with the current sponsor’s name, advertising message and website. Useful for testing how your app handles a response.

This is an independent project. Sponsorship does not confer ownership of HTTP standards.

Client error responses explain why a request could not be fulfilled.

Check the URL, method, authentication and request content. Repeating the same request without addressing the cause may produce the same response.

Reference reviewed 5 September 2026. How we use sources.