Here's an example payment link - https://fountain.fm/episode/JCIzq3VyFKQVkEzVNA8v?payment=5XIAt66P29Iv6rjSTZUB And here's how you can query the JSON programatically via curl: curl -I -s -o /dev/null -w '%header{x-rss-payment}' "https://fountain.fm/episode/JCIzq3VyFKQVkEzVNA8v?payment=5XIAt66P29Iv6rjSTZUB" (note this is URI encoded JSON string)