Build your waitlist
into anything

Waitlister provides a REST API with JSON request/response, API key auth, rate limit headers, and endpoints for adding, listing, getting, and updating subscribers — plus custom point assignment and analytics logging. On top of the REST API: real-time webhooks for 3 event types (signup, referral, milestone), HMAC signature verification, automatic retries, and a form action endpoint for zero-JS HTML form integration. Native plugins for 9 platforms (Framer, Webflow, WordPress, Shopify, and more). API access starts at $39/mo (Growth). The form action endpoint and plugins work on all plans.

Yes — two options: 1. REST API: build a fully custom form and call the API from your Next.js server or client 2. Form action endpoint: point a standard HTML form to our endpoint — no JS needed, works with server-side rendering and server actions Both support double opt-in, referral tracking, and custom fields. The form action endpoint is the simplest; the API gives you full control over the UX.

Yes. Include the referral code in metadata when adding a subscriber: { 'metadata': { 'referred_by': 'happy-star-4f3d' } } By default, API signups skip fraud detection (since the IP Waitlister sees is your server's). To enable it, forward the end user's real IP and/or device fingerprint in the metadata. When either is provided, the full fraud pipeline runs.

Three events, each toggleable independently: • waitlist.signup_created — new subscriber joins • waitlist.referral_completed — successful referral (fraud-blocked ones don't fire) • waitlist.milestone_reached — subscriber hits a configurable points threshold Payloads include subscriber data, metadata, position, points, and referral details. All webhooks are HMAC-signed for security and automatically retried on failure.

Yes. The form action endpoint lets you point any HTML form's action attribute to Waitlister's endpoint. No JavaScript needed. Standard form submissions redirect to the thank-you page; AJAX submissions return JSON. This works with any frontend: static HTML, server-rendered pages, no-code builders, email links. It supports custom fields and respects double opt-in settings.

Growth plan: 60 requests per minute for subscriber endpoints, 200 RPM for the log view endpoint. Business plan: 120 RPM for subscriber endpoints, 400 RPM for log view. Rate limit headers (X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Reset) are included in every response. Implement exponential backoff on 429 errors. For enterprise needs, contact support for custom limits.

Yes — via webhooks. Set up a webhook for the waitlist.signup_created event and point it at your CRM's API (or a middleware like Zapier/Make). Every new subscriber triggers a real-time HTTP notification with all their data. You can also use the List Subscribers endpoint to batch-sync periodically, or the Get Subscriber endpoint to look up individual records on demand.

The REST API and webhooks require the Growth plan ($39/mo) or Business plan ($99/mo). Business doubles the rate limits and adds priority support. The form action endpoint and all platform plugins (Framer, Webflow, WordPress, Shopify, etc.) work on every plan, including Free.