Free browser-only launch lane
Free Lemon Squeezy webhook test tools
Use these free BillingWebhookKit pages to test Lemon Squeezy webhook payloads, raw-body signatures, replay commands, idempotency keys, checkout smoke evidence, and Next.js route safety before exposing a paid checkout link.
Lemon Squeezy webhook payload generator
Create fake order, subscription, payment, cancellation, and license webhook payloads for local tests without calling Lemon Squeezy APIs.
SignatureLemon Squeezy x-signature verifier
Compare a raw request body with a received HMAC signature locally in the browser, so signing secrets are not uploaded to a hosted service.
ReplayWebhook replay cURL generator
Build repeatable cURL commands for local, tunnel, staging, and CI webhook route tests across Lemon Squeezy, Stripe, Paddle, and Polar.
Next.jsNext.js Lemon Squeezy raw body audit
Check whether an App Router webhook route preserves request.text(), avoids JSON reserialization, and keeps x-signature verification testable.
Webhook idempotency key generator
Generate provider-scoped idempotency keys, SQL uniqueness notes, handler guards, and duplicate replay test snippets for payment side effects.
CheckoutLemon Squeezy checkout smoke test report
Turn price, checkout URL, paid webhook delivery, duplicate replay, fulfillment, and rollback checks into a PR-ready launch report.
EndpointLemon Squeezy webhook endpoint smoke test
Check the webhook URL, POST route, live/test mode, subscribed events, 2xx response, x-signature gate, retries, and fulfillment routing.
Mode checkLemon Squeezy live/test mode checker
Check whether checkout, variant, store, webhook endpoint, signing secret, order payload, and fulfillment route evidence all point to the same environment.
What stays free
- Browser-only fake payload generation and HMAC signing helpers.
- Raw-body signature mismatch debugging without account login.
- Replay cURL commands, idempotency notes, and launch checklists.
- Public free sample ZIP with starter fixtures, handler examples, tests, and CI skeleton.
When the CNY 69 Pro Kit makes sense
Buy the Pro Kit only if you want the copy-ready private package: expanded fixtures, route handlers, contract tests, duplicate replay tests, GitHub Actions checks, idempotency runbooks, and PR-ready review templates in one downloadable archive.