Add Subscribers via API
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To keep users updated, we wanted anyone who buys Feather subscription to get added to our mailing list automatically.
To solve this, we built an API that lets you programmatically add subscribers to your newsletter.

You can find the API endpoint, key management, domain whitelisting, and usage examples under Settings → API Access in your Feather dashboard.
Here’s a sample request:
curl -X POST https://i5bgndtpteup4lrtpvnhorhu0fcfgp.lambda-url.eu-central-1.on.aws \
-H "X-API-Key: YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"publicationId": "NEWSLETTER_ID", "email": "user@example.com"}'
This makes it easy to connect external apps, blogs, or signup forms directly to your Feather newsletters.
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