Overview
To authenticate with Kit, you need:- API Key — a V4 API key from your Kit account settings.
Prerequisites
- A Kit account. If you don’t have one, sign up.
Step 1: Create a V4 API key
- Sign in to Kit and open Settings > Developer (direct link).
- Under API keys > V4 Keys, click Add a new key. Use a V4 key, not the legacy V3 Key shown on the same page.

- Enter a name in Name (Internal use only), then click Create API Key.

- Click Copy to copy the key, then click Done. You can’t view the key again after you close this window.

Step 2: Enter your API key in the Connect UI
- Open the form where you need to authenticate with Kit.
- Enter your V4 API key in the API Key field.
- Submit the form, and you should be successfully authenticated.
