> ## Documentation Index
> Fetch the complete documentation index at: https://signatureapi-daf4ee54.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Authentication

> Set up API key authentication to connect SignatureAPI with Power Automate

## 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](https://accounts.signatureapi.com/sign-up).

To get your API key:

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

<Frame>
  <img src="https://mintcdn.com/signatureapi-daf4ee54/5kf_xnmgDccjHgkV/docs/integrations/power-automate/images/authentication-dashboard.png?fit=max&auto=format&n=5kf_xnmgDccjHgkV&q=85&s=79a41117ddd5eea29a4fe91f5c068059" alt="" width="2880" height="1624" data-path="docs/integrations/power-automate/images/authentication-dashboard.png" />
</Frame>

## 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.

<Frame>
  <img src="https://mintcdn.com/signatureapi-daf4ee54/5kf_xnmgDccjHgkV/docs/integrations/power-automate/images/authentication-create-connection.png?fit=max&auto=format&n=5kf_xnmgDccjHgkV&q=85&s=f4ef0ce27962784445658f80d55a58a7" alt="" width="2880" height="1620" data-path="docs/integrations/power-automate/images/authentication-create-connection.png" />
</Frame>

You can name the connection (for example, **SignatureAPI Test** or **SignatureAPI Live**), depending on which API key you're using.