The XMPP Extensions Editor has received a proposal for a new XEP.
Title: Payment Required
Abstract:
This specification defines an XMPP protocol extension that enables
services to require payment before granting access to a resource. It
provides a payment-system neutral invoice format supporting multiple
concurrent payment options, including bank transfers (SEPA, IBAN, UPI)
and instant-settlement networks (Lightning Network), and integrates
with the existing CAPTCHA challenge mechanism defined in XEP-0158.
URL:
https://xmpp.org/extensions/inbox/payment-required.html
The Council will decide in the next two weeks whether to accept this
proposal as an official XEP.