> ## Documentation Index
> Fetch the complete documentation index at: https://nango.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Anvil - How do I link my account?

# Overview

To authenticate with Anvil, you will need:

1. **API Key** - Your Anvil organization API key from the Organization Settings page.

This guide will walk you through finding your **API key**.

### Prerequisites

* You must have an Anvil account. [Sign up here](https://app.useanvil.com/user/signup) if you don't have one.

### Instructions

#### Step 1: Finding your API key

1. Log in to your [Anvil account](https://app.useanvil.com), click your profile, then navigate to **Organization Settings** -> **API**.
2. You will see two keys: a **development key** and a **production key**.
   * Use the **development key** for testing — requests are free but rate-limited and generated PDFs will have a watermark.
   * Use the **production key** for live use.
3. Click to copy the key you want to use.

<img src="https://mintcdn.com/nango/-0X2PMY1g-c4xHkG/api-integrations/anvil/api_keys.png?fit=max&auto=format&n=-0X2PMY1g-c4xHkG&q=85&s=42aa965fcef76ba6ab26ef9e4d8b24dd" width="1914" height="861" data-path="api-integrations/anvil/api_keys.png" />

#### Step 2: Enter your API key in Nango

1. Open the form where you need to authenticate with Anvil.
2. Paste your API key into the **API Key** field.
3. Submit the form, and you should be successfully authenticated.

<img src="https://mintcdn.com/nango/-0X2PMY1g-c4xHkG/api-integrations/anvil/form.png?fit=max&auto=format&n=-0X2PMY1g-c4xHkG&q=85&s=dbe667431704559f033c0f744afdc039" style={{maxWidth: "450px" }} width="501" height="699" data-path="api-integrations/anvil/form.png" />

You are now connected to Anvil.