Authentication - Zamp

To access Zamp API endpoints, you must authenticate every request with your API key, sent as a bearer token.

Bearer authentication

All API calls require the key in the HTTP Authorization header.

curl https://api.zamp.com/transactions \
  -H "Authorization: Bearer {your-api-key}"

Replace {your-api-key} with your key. To get one:

Get a free 30-day trial key for testing — no sales call required
Copy your production key from your Zamp account

Always keep your API key safe and reset it if you suspect it has been compromised.

Once you’re authenticated, the Quickstart walks through your first calculation.

Last modified on August 21, 2026