Thanks to Andrew Betts, a PHPlondon regular, for coming up with BadAPI, a service that allows you to simulate misbehaving APIs.

These days there’s almost no such thing as a web app that’s not integrating data from various external APIs, and with that integration comes a new set of problems the developer must handle.

From the BadApi website:

BadAPI allows you to simulate misbehaving APIs. This is useful if your site relies on the availability of service X, and you want to ensure that any downtime experienced by that service has minimal impact on your own application.