Images.weserv.nl Uses policy

We have some image link like “//mydomain.net/ABC/190778882/1?lm=20190510T205730”.
We want to display this image on an Iframe. But using this URL on the image src we are unable to display the images. But if we use https://images.weserv.nl/?url= API before the image URL we are able to display the image on the IFrame.
Can Anyone let me know either API is free? or we have to purchase.
If purchase then please provide us the purchase link.

Thanks in advance

How is weserv.nl related to Cloudflare?

https://images.weserv.nl/#quick-reference

Please go through

  • The CDN is provided by Cloudflare. Images are being cached and delivered straight from 150+ global datacenters. This ensures the fastest load times and best performance.

They are using Cloudflare themselves but any questions you have for them you still need to ask them, not Cloudflare.