anyone know how to integrate API's?

I have a supplier, (print on demand) and they have an API, but i am not sure how to do this with opencart.

Anyone able to help?
(note, copy/paste pm's will be ignored, ive wasted time before chasing folk who did not even read what I was after in first place!)

Hi madmikefalkirk, feel free to drop us an email for a quick estimate: info@antropy.co.uk

Hello there,
Greetings!!!

I have gone through your requirement and want to assist you with API.

Please get in touch with the below-shared contact details to discuss further.
E- alanjones(dot)tis(at)gmail(dot)com
Skype - live:.cid.6a62b7b34d1aa390

Looking forward to hearing from you

Regards,
Alan Jones

Hi Mike

Can you PM me with more details on your requirements with the API itself and I can give you an estimate for the work and time. I'll also need to know your OpenCart version. Haven't worked with this API specifically but have with plenty of others

Cheers
Jay

Hello,
Hope you are doing well!
We would like to assist you with this requirement.
Please reach me at jennifer@cisinlabs.com or live:jennifer_17207.
Hope to hear from you soon.
Regards,
Jennifer