Project in transition
Currently the project is in transition to a collaborative group effort under a github organisation.
Work is being done to migrate and upgrade all CI/CD integrations from personal accounts to organisation accounts.
Pull requests are welcome, but don't expect anything to be merged until CI/CD infrastucture is up and running.
Many thanks goes to Brandon Byars for all the effort building mountebank in the first place, for maintaining the project for more than a decade, and finally, for being helpful and collaborative during this transition phase.
Welcome, friend
Build status: 
mountebank is the only open source service virtualization tool that competes with the commercial offerings
in terms of protocol diversity, capability, and performance. Here's what
Capital One wrote
about their mobile cloud migration (emphasis theirs):
In fact, halfway through we discovered our corporate mocking software couldn’t handle the
sheer amount of performance testing we were running as part of this effort (we completely crushed
some pretty industrial enterprise software in the process). As a result, we made the call to move
the entire program over to a Mountebank OSS-based solution with a custom provision to give us the ability
to expand/shrink our mocking needs on demand.
At the moment, the following protocols are implemented, either directly in the tool or as a community extension:
- http
- https
- tcp (text and binary)
- smtp
- ldap