Connect CycleSoftware API with Modx

Can anyone please guide me how to connect API with Modx?

I’ve never heard of the CycleSoftware API, but in general, if you want to make requests to any API from PHP, you can use cURL or better Guzzle.

In MODX 3 Guzzle is built-in, in MODX 2.x you could use the Guzzle7 extra.