It turns out that despite receiving absolutely no feedback about it, some people are actually using my Html to Gemtext API:
My previous hosting provider changed their pricing plan so it was time to move. If I’d known people were using it I would have tried to ensure minimal downtime but until just now I hadn’t realised this, so I took my time about it. There was an evening of wasted effort trying to shoehorn it into AWS Lambda before I decided to just add it to the VPS running this site.