Grammarly does not offer an API in its current form, but there are alternatives like https://www.grammarbot.io/. My proposition is the web-client integrate an API like this with a few key features tailored to the community's needs.
* Recognition of MOO commands and emote architecture.
* Access to a cyberpunk slang dictionary that will offer alternatives to commonly used words with a simple right-click.
* A tone predictor akin to Grammarly but geared toward the theme. i.e., Sounds Corporate/Mixer, etc.
* MOO Integrated autocomplete via TAB. i.e., Type wield t followed by TAB will cycle through objects in your inventory starting with the letter T like a modern CLI.