Checkbox

Check a subscription checkout's renewal terms in one command. Free auto-renewal law checks (FTC ROSCA, click-to-cancel, California, New York and other state automatic renewal laws) for Stripe Checkout, cancellation flows and renewal reminder emails. Offline: no account, no key, nothing leaves your machine.

npx @checkbox-site/cli check disclosure --offline \
  --text '$19.99 per month.' --price 19.99 --interval month \
  --merchant-name Acme --cancel-url https://acme.example/cancel --consent-checkbox --bold

FAIL  disclosure · all jurisdictions · rules 1.4.0 · catalog 2026.11.09.3 · offline
  ✗ signup.disclosure.autorenew_language (critical)
  ✓ signup.disclosure.price (critical)
  ✓ signup.disclosure.frequency (critical)
  ✗ signup.disclosure.cancellation_policy (critical)
  ✓ signup.disclosure.term_length (critical)
  ? signup.disclosure.proximity (critical)
  ? signup.disclosure.conspicuous (critical)
  ? signup.consent.affirmative (critical)
  ✓ signup.consent.not_prechecked (critical)

Suggested replacement (passes the checks) (verified by the rules engine)
  disclosure:     Renews automatically every month at $19.99 (plus applicable taxes) until you cancel. Cancel anytime online at
                  https://acme.example/cancel before your next billing date to avoid the next charge.
  checkbox:       I agree that my Acme subscription renews automatically every month at $19.99 (plus applicable taxes) until I
                  cancel, and I understand I can cancel anytime online at https://acme.example/cancel.

The output is abridged: the full run also prints each failing check's reason and fix, and a fuller version of the line. ✓ passes · ✗ fails · ? needs review. More offline checks: https://checkbox.site/docs/cli#offline

What it is

Automatic-renewal law compliance for subscription businesses, as an API, an MCP server and assistant integrations. Checkbox checks a subscription checkout, its renewal emails and its cancellation flow against US automatic-renewal laws — federal ROSCA, California Bus. & Prof. Code § 17600 et seq., New York GBL § 527-a and the other state laws — and returns the exact change to make. Free. Checkbox is a System1 company.

• Docs: https://checkbox.site/docs · Docs for agents: https://checkbox.site/llms.txt
• API reference (OpenAPI 3.1): openapi/checkbox.v1.json, live at https://app.checkbox.site/v1/openapi.json
• Open dataset of the laws: https://github.com/checkbox-site/auto-renewal-laws
• Starter apps: https://github.com/checkbox-site/templates

Rules drafted from the statute text and updated as new statutes come into effect. Automated checks, not legal advice. Every rule cites its source, so you or your lawyer can check it.

Use it from your coding assistant

What they do: when you build or change a subscription, a free trial, Stripe Checkout in subscription mode, a pricing page or a cancel flow, the assistant asks once whether you want it made compliant with US

... View full README on GitHub