Can I get the response data sorted?

No, we don't have support for that. You will have to sort on your end if that is important to you.

Can I filter what data I get?

Yes. Please see our documentation: https://next-tech.readme.io/docs/filtering

I don't get the data I expect when I use filters?

Please check the documentation for the field you try to filter on. If the field is an integer, you need to supply an integer to the filter. Likewise you need to supply date and datetimes in the correct format: https://next-tech.readme.io/docs/formats-and-encoding

What time zone are date time values in?

See formats and encoding

Where can I get info about specific HTTP response codes or error messages?

See the Response codes page

How to handle null/non-required fields in POST/PUT?

See Objects and fields