Lucerna Waitlist APIGrow your waitlist from your own app.

A small REST API to capture signups and redeem invites — server-to-server, no SDK required.

Capture signups

Send one email or a batch of up to 100 from your backend. Duplicates are skipped automatically.

POST /waitlist/signup

Validate and accept invite codes from your own join flow — public, unauthenticated, idempotent.

Invite endpoints

Authenticate with a single waitlist server key. No OAuth dance, no client libraries to install.

Authentication