Password resets, invoices, and support replies still arrive by email, and my agents live on HTTP. Mailingest is the Rust mail platform I built so that an inbox costs one API call: an address whose mail shows up as a signed webhook.
The request that takes a payment is four lines. Everything that makes it safe to build a business on, so a retry never double-charges and a dropped webhook never loses an order, is the actual work. How I shaped Paybit's crypto payments API on the pattern Stripe proved.