EDIT 5/10/2026: As of agent version 1.0.59 you can connect it directly to a HomeKit hub.
Original reply:
You can use the homebridge-http-switch plugin with a configuration like this. Click the red Bookmark button for the command you want to run, then copy the bookmark URL for the onUrl setting. I recommend a "Short Bookmark" for this use-case because unlike the original Bookmark URL's, they persist, even when you make changes to your commands. You can also change short bookmarks to a different computer/command combo in the triggercmd.com site UI, so you don't have to update the bookmark URL in the homebridge-http-switch config.
34a74b9b-a1ce-4b77-bba7-e63724b4e4b3-image.png
{ "accessory": "HTTP-SWITCH", "name": "TRIGGERcmd - Calculator", "switchType": "stateless", "timeout": 500, "onUrl": "https://triggercmd.com/sb?b=blahblah" }a461eacc-6e74-4c12-9e20-245ddc790878-image.png