Here is a list of machine code errors that can occur on every call. They're documented here so they don't take up space on every API page.
- InvalidToken: an invalid authentication token was passed
- Forbidden: you lack the proper permissions to perform this call.
- PropertyIsRequired: you left out a non-optional parameter.
- ValueTooLong or ValueXTooLong: the string you passed is too long.
For more information about machine code errors, check out API Idioms.