There is currently a tag. However, mastercoin renamed to Omni quite some time ago, and is no longer used. Most users who started in recent times simply know it as Omni or Omni Layer.

I suggest that we merge the mastercoin and omni tags in light of this.

  • Looks like you're right Commented May 22, 2018 at 3:38

2 Answers 2


Thanks! I've

  1. merged into
  2. kept as a synonym for ,
  3. added as a synonym for ,
  4. and added a brief description to the tag:

    Omni is a second layer protocol on top of Bitcoin that uses OP_RETURN outputs to track payments. Omni was previously called Mastercoin.

  • Thank you! Might also be worthwhile to create an omnilayer synonym. I tried, but I don't have a high enough tag score to propose synonyms yet. Commented May 22, 2018 at 20:39
  • 1
    @RaghavSood: Done. ;)
    – Murch Mod
    Commented May 22, 2018 at 21:10

Makes sense to me.

I'm assuming that merging them will result in old tags simply being replaced by tags?

Would searching for mastercoin on the site redirect users to the tag, post-merge?.

Doing a quick search on the site, mastercoin returns 61 results, while omni returns 16 results, for whatever thats worth.

  • I believe that's how it works. The recent zmq->zeromq merge resulted in zmq redirecting Commented May 22, 2018 at 18:00
  • When we merge one tag into another, we have the option to keep a synonym or remove the old tag. In this case, I'd keep the synonym.
    – Murch Mod
    Commented May 22, 2018 at 20:14

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