Monetize
Products and prices, paywall rules (metered, hard, registration, soft, newsletter, data), Stripe checkout, subscription management, invoices, and customer-portal access. → Build a paywall
Latch
Drop-in paywalls, subscriptions, and audience tools for publishers.
Add Latch in two lines
Section titled “Add Latch in two lines”<meta name="latch:key" content="pk_your_publishable_key" /><script src="https://latch-api.v3ck.com/sdk/latch.js"></script>The SDK reads your key, derives the API origin from itself, persists an anonymous visitor ID, tracks pageviews, evaluates paywall rules, and renders the configured paywall — all on its own. Pick the integration that fits your stack:
HTML script tag Drop two lines into the . No build step.
WordPress plugin Bundled plugin for WordPress sites.
JavaScript SDK npm package for bundled JS apps.
What you can build
Section titled “What you can build”Know your audience
Identify logged-in readers, store custom attributes, authenticate customers from your own UI, and group them into segments by subscription state, behavior, or stored fields. → Identify users
Grow
Run campaigns for newsletter and data capture, A/B-test paywall variants with experiments, orchestrate multi-step journeys, and watch conversion analytics. → Campaigns
Integrate
Embeddable web components for paywalls, content locks, sticky bars, and newsletter walls. Outbound webhooks for downstream automation. Branded UI without writing CSS. → UI components
Reference
Section titled “Reference” JavaScript SDK Full API: init, checkAccess, identify, checkout, auth helpers, event tracking.
REST API Endpoint catalog with publishable-key, customer-JWT, and secret-key auth tiers.
Webhook events Payload schemas — customer.created, subscription.updated, experiment.converted, and more.