Issue with HTTP Header

Hi,

I’m trying to import from an API that requires a version number to be passed in the HTTP Header. I was able to get this working using the suggestion from this post – https://wordpress.org/support/topic/url-http-header/

The API returns 25,000+ entries but has a default limit of 25, which I can alter using &limit={number}. I’ve tried setting this limit to a number larger than the 25,000 but when I do this I get the same warning I got for the version number before using the code from the link above. The highest I’ve been able to set the limit to which doesn’t produce this error and returns the data is 850.

Any help with this would be greatly appreciated.

Thanks.