It's not only to the aggregator. In a nutshell, what you need to do is to publish your orders to nostr and keep their status updated 🙂 that's way more beneficial because your orders can be fetched by any nostr client compatible with this NIP (nowadays p2p.band and nostr:nprofile1qqsyx53h3h7ec4fwlspjq0kqec5gv54t7rc48xdtq6q4y94wsw4fnjqprdmhxue69uhkummnw3ezuumpw3ehgunpd35kztnrdakj7qghwaehxw309aex2mrp0yhrq7rrdpshgtnrdakj7qg4waehxw309aex2mrp0yhxgctdw4eju6t09uhgml9t)

Here is a POC I did for your API. https://github.com/RoboSats/robosats-nostr-sync/blob/main/app/hodlhodl.py but it's not much efficient. Feel free to use it and adapt it. That's what Peach did.

Here you can find the NIP https://github.com/nostr-protocol/nips/blob/master/69.md

If you need support just DM me here or in SimpleX, happy to help 🎉