Newsletter

Subscriber capture and lists
Total subscribers
all time
Last 7 days
new sign-ups
Last 30 days
new sign-ups
Today
since midnight
Recent sign-ups
Email Source When
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Top sources
From the most recent sign-ups.
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Next steps
Drop the <ff-newsletter> snippet on your site, or POST to the subscribe URL directly.
Subscribers
Email Source Status Subscribed  
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Subscribe URL
POST JSON { email, source?, hp, ts } with Authorization: Bearer <license-jwt>. Calls are accepted only from origins on the license's domain allowlist (wildcards like *.example.com supported; localhost is exempt for dev). The <ff-newsletter> widget handles the JWT for you.
Manage authorized domains per license in Licenses & Domains. Server-to-server callers can use X-Api-Key with the platform key instead of a JWT.
Embed on your site
Drop this snippet into any page to start collecting subscribers.
Replace your-api-key with a license key for the newsletter product. Issue keys to your authorized domains in Licenses & Domains.
Dev-only embed (no license check)
Built-in anti-spam: honeypot hp field (silent drop on bots) · 3-second submit-time check (silent drop) · 10-request/hour-per-IP rate limit (returns 429) · idempotent on duplicate emails.