Returning problem details on API request limits
The elmah.io API uses the Problem Details (rfc7807) specification to communicate errors back to the client. In a recent change, communication from the request limit feature has been changed to use Problem Details responses too, to avoid returning errors in different formats. The response status code still equals 429 and no changes are needed on your part unless you are inspecting the response body from request limit error responses. The new response looks like this:

1 request per hour is from a test environment. The production API accepts 500 requests per API key per minute and 3,600 requests per API key per hour.