How do I update an existing pass via the API?
Send a PATCH request to the pass endpoint with the identifier of the pass and your API key in the Authorization header. Send only the fields you want to change. Images need a public URL and the size and format of the template.
The endpoint is PATCH https://app.passcreator.com/api/v3/pass/{identifier}. To change a photo, send for example {"urlToThumbnail": "https://example.com/photo.jpg"}. For many passes at once, add the thumbnail URL as a column in bulk processing. You find the reference at Update Pass.
Checked 2026-09-01 · Support