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August 11, 2026

How to Connect Authorize.net

A reliable gateway for small to mid-size businesses.

What you'll need

An Authorize.net account with API access enabled.

Step 1 — Get your credentials

Log in to authorize.net and open Account → API Credentials & Keys. Your API Login ID and Transaction Key are listed there. Enable the Signature Key for webhooks if you use them.

Step 2 — Connect in SellDesk

  1. Open Settings → Payments.
  2. Expand the Authorize.net card.
  3. Paste your Login ID, Transaction Key, and Signature Key.
  4. Save changes and toggle Authorize.net on.

Tip

Your Transaction Key is masked in the dashboard — click the eye icon to reveal it when connecting.