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  • 🚀 Quickstart
  • 🧑‍💻 OAuth app setup
  • 🚨 API gotchas
1

Create an integration

In Nango (free signup), go to Integrations -> Configure New Integration -> Fillout. Nango doesn’t provide a test OAuth app for Fillout yet. You’ll need to set up your own by following these instructions. After that, make sure to add the OAuth client ID and secret in the integration settings in Nango.
2

Authorize Fillout

Go to Connections -> Add Test Connection -> Authorize, then log in to Fillout. Later, you’ll let your users do the same directly from your app.
3

Call the Fillout API

Let’s make your first request to the Fillout API (fetch a list of all your forms). Replace the placeholders below with your secret key, integration ID, and connection ID:
  • cURL
  • Node
curl "https://api.nango.dev/proxy/v1/api/forms" \
 -H "Authorization: Bearer <NANGO-SECRET-KEY>" \
 -H "Provider-Config-Key: <INTEGRATION-ID>" \
 -H "Connection-Id: <CONNECTION-ID>" \
Or fetch credentials dynamically via the Node SDK or API.
✅ You’re connected! Check the Logs tab in Nango to inspect requests.
Next step: Embed the auth flow in your app to let your users connect their Fillout accounts.
Questions? Join us in the Slack community.