​

Get your API Key

SignatureAPI actions and triggers in Power Automate authenticate using an API key.

If you haven’t already, sign up for a free SignatureAPI account.

To get your API key:

1. Go to Dashboard > Settings > API Key.
2. Click to copy your test API key.

​

Test vs Live Mode

Test API keys let you create envelopes for testing your flows. These envelopes:

• Don’t send real emails to recipients (but you can preview them in the Email section of your dashboard).
• Are not legally binding.
• Are free to use.

When you’re ready to send real, legally-binding envelopes, add a payment method and get a live API key. Envelopes created in live mode:

• Send actual emails to recipients.
• Are legally binding.
• Are billed.

​

Creating a Connection

The first time you add a SignatureAPI trigger or action in Power Automate, you’ll be asked to create a connection.

You can name the connection—for example, SignatureAPI Test or SignatureAPI Live, depending on which API key you’re using.