Documentation
One API call before anything is printed. Each guide takes you from nothing to a working verification, and stands on its own.
Supplier quickstart
For printers and manufacturers. Get a key, send an image, read the answer.
Read the guide
Licensee quickstart
For license holders. Authorize the printers who produce for you, and verify anything you print yourself.
Read the guide
Agent integration prompt
For printers whose coding agent writes the integration. One self-contained prompt to paste, covering the whole API contract.
Read the guide
There is no signup form yet. Email help@checkmerch.io and we will set you up with a key. Verification is free.