The specification appears to be very similar to FeedAPI which I have been involved with: https://github.com/vippsas/feedapi-spec https://github.com/vippsas/fee

The specification appears to be very similar to FeedAPI which I have been involved with: https://github.com/vippsas/feedapi-spec https://github.com/vippsas/feedapi-spec Our focus was kind of the opposite though: Remove the event broker instead of adding one. If I understand correctly, Mercure allows you to push events to the broker and clients pull log-based events. With FeedAPI we focused instead of removing the broker (RabbitMQ/Kafka/...) and let clients pull log-based events directly from backends. Very similar protocol though.