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Overview

To authenticate with Fillout (API Key), you need:
  1. Hostname - Your Fillout instance URL
  2. API Key - A key that grants Nango permission to interact with Fillout’s API resources and services
This guide will walk you through finding both your Hostname and API Key within Fillout.

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Prerequisites

  • You must have a Fillout account

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Step 1: Finding your hostname and API key

  1. Navigate to Developer settings.
  2. Click Enable API if you haven’t already done so.
  1. Your Hostname will appear in the Base URL field. It is the value between https:// and /v1/api. In the example below, the Hostname is api.fillout.com. Your API Key will be shown in the API Key field.

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Step 2: Enter credentials in the Connect UI

Once you have both your Hostname and API Key:
  1. Open the form where you need to authenticate with Fillout (API Key).
  2. Enter your Hostname and API Key in their respective fields.
  3. Submit the form to complete authentication.
You are now connected to Fillout (API Key).