This page captures current and known future capabilities of server software that supports the Metadata Query Protocol.
- Ian Young's mdq-server reference implementation based on the Shibboleth Metadata Aggregator
- pyff.io deployed in "daemon mode". Docker images can be found at docker-hub and at https://github.com/SUNET/docker-pyff
- a nightly(ish) build is often running at https://nightly.pyff.io
- pyffd has been running at md.nordu.net for use by a bunch of nordic NREN services for a few years (mostly for the DS functionality)
- Are there other implementations of the MDQ server protocol?