The More Instant Messaging Interoperability (MIMI) working group is defining an internet standard - the minimal set of mechanisms required to make modern Internet messaging applications interoperable. In light of the Digital Markets Act landing in 2023, big messaging platforms need to offer an API and become interoperable. The Matrix has proposed their own approach to be the standard.

- Matrix Message Format

- Matrix Message Transport

Close date updated to 2023-12-31 6:59 pm