Problem types

When Auto can't do what a request asks, the error names one of these pages in its type. Each page says what went wrong and what to do next.

Problem	Status	Reason
Bad request	400	bad_request
Unauthenticated	401	unauthenticated
Forbidden	403	forbidden
Origin not allowed	403	origin_not_allowed
Not found	404	not_found
Method not allowed	405	method_not_allowed
Conflict	409	conflict
Tools called	409	conflict
Effect unknown	409	conflict
Credits exhausted	409	conflict
License required	409	conflict
License invalid	409	conflict
Account closed	409	conflict
Cancelled	409	cancelled
Unanswered	410	unanswered
Content too large	413	content_too_large
Unsupported media type	415	unsupported_media_type
Range not satisfiable	416	range_not_satisfiable
Invalid input	422	invalid_input
Cursor not held	422	invalid_input
Client closed request	499	client_closed_request
Internal error	500	internal
Unavailable	503	unavailable
Tools unfinished	503	unavailable

Responses and errors in the HTTP API reference has the full detail of every problem type.