NOTICE

http-message-signatures is a free open source implementation of the
IETF HTTP Message Signatures standard, RFC 9421.  This project is
staffed by volunteers. If you are using http-message-signatures in a
for-profit project, please contribute to its development and
maintenance using the "Sponsor" button on the GitHub project page,
https://github.com/pyauth/http-message-signatures. If you are looking
for support with commercial applications based on
http-message-signatures, please donate and contact its developers
using the issue tracker on the http-message-signatures project page or
the contact information listed in README.rst.