# Canada Natural Health Product Check

> Verify supplements and natural health products are licensed in Canada (NPN) — ingredients, claims and risk statements from Health Canada's LNHPD.

Remote MCP server (Streamable HTTP): https://ca-natural-health-products-mcp.donniertf.workers.dev/mcp
Free tier: `npn_check` — no key, no sign-up, 20 calls/day per IP.
Pro: C$12/month, cancel anytime — all tools, unlimited.

## Tools
- npn_check (free): FREE. Verify a Natural Product Number (NPN/DIN-HM) is licensed by Health Canada: product, company, form, status.
- npn_detail (Pro): PRO. Medicinal ingredients with quantities, recommended uses/claims, dose and risk information for an NPN.
- batch_npn_check (Pro): PRO. Check up to 50 NPNs at once (e.g. a marketplace or store catalogue) — licensed or not, product and company names.

## Buying (agents)
1. POST https://ca-natural-health-products-mcp.donniertf.workers.dev/checkout -> {checkout_url, session_id}. A human (or a payment-capable agent) completes Stripe Checkout at checkout_url.
2. GET https://ca-natural-health-products-mcp.donniertf.workers.dev/token?session_id=... -> {access_token}.
3. Send Authorization: Bearer <access_token> to https://ca-natural-health-products-mcp.donniertf.workers.dev/mcp (or pass access_token in tool arguments).

## Pay per call (x402, USDC on Base)
No account: POST JSON args to https://ca-natural-health-products-mcp.donniertf.workers.dev/x402/<tool> -> HTTP 402 with payment requirements ($0.03 USDC per call, payTo 0x02226D28e0c85AE4AdDB7fe7043Dd2b1Ff710D41). Retry with an X-PAYMENT header (x402 v1, scheme exact, network base). Manifest: https://ca-natural-health-products-mcp.donniertf.workers.dev/.well-known/x402. MCP clients may also send X-PAYMENT on tools/call.
Machine-readable pricing: https://ca-natural-health-products-mcp.donniertf.workers.dev/pricing.json · Server card: https://ca-natural-health-products-mcp.donniertf.workers.dev/.well-known/mcp

## Sources
- Health Canada Licensed Natural Health Products Database API (Open Government Licence – Canada)

## Notes
Health Canada Licensed Natural Health Products Database (live API). Information only — not medical advice.
Contact: dmorrisonwebdesign@gmail.com. More UK data MCPs: https://github.com/donniertf-hub/uk-mcp-fleet