Open-source tools by chemvl
chemvl builds small, focused tools for everyday work. Each one does one job well, and every one of them is open source.
"status": "shipped"
One keeps what you capture on your desktop. The other gives your app an API before the backend exists.
A desktop pet that keeps what you capture.
Drop links, files, screenshots and text on your pet. Co-pet sorts them on your computer, turns what needs doing into tasks, and hands everything back when you need it.
$ curl https://app.chemvl.com/m/platform/orders-v2/orders/42 HTTP/1.1 200 OKcontent-type: application/json { "id": 42, "status": "shipped", "total": 129.5, "currency": "USD"}
Mock APIs your AI agent can control.
Upload an OpenAPI or Postman file and get a live mock URL, so your frontend and tests can start before the backend ships. A built-in MCP server lets your agent change what it returns.
Big apps try to do everything. We would rather build one thing that works, then the next.
Every tool solves one problem you actually have, then stays out of the way the rest of the day.
Read the code, change it, run it yourself. Issues and fixes are welcome.
Plain words, calm screens and sensible defaults, so it feels good to use every day.
Every line is public. Clone it, learn from it, and tell us what to fix.
Desktop pet and universal inbox
git clone https://github.com/chemvl/co-pet.gitHosted mock APIs with an MCP server
git clone https://github.com/chemvl/mockvl.gitEnjoying Co-pet or mockvl? A coffee keeps the next tool brewing.
Buy me a coffee