# US Drug Shortages (FDA)

> Which drugs are in shortage right now? FDA shortage status, reasons and availability — with formulary watchlists for pharmacies and clinics.

Remote MCP server (Streamable HTTP): https://us-drug-shortages-mcp.donniertf.workers.dev/mcp
Free tier: `shortage_check` — no key, no sign-up, 20 calls/day per IP.
Pro: $9/month, cancel anytime — all tools, unlimited.

## Tools
- shortage_check (free): FREE. Is this drug in shortage in the US? FDA shortage status for a generic or brand name — top 3 presentations.
- shortage_list (Pro): PRO. All current (or resolved) shortages, optionally by therapeutic category (e.g. 'Oncology', 'Anesthesia').
- formulary_watch (Pro): PRO. Check up to 100 drugs on your formulary/stock list against current FDA shortages.

## Buying (agents)
1. POST https://us-drug-shortages-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://us-drug-shortages-mcp.donniertf.workers.dev/token?session_id=... -> {access_token}.
3. Send Authorization: Bearer <access_token> to https://us-drug-shortages-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://us-drug-shortages-mcp.donniertf.workers.dev/x402/<tool> -> HTTP 402 with payment requirements ($0.02 USDC per call, payTo 0x02226D28e0c85AE4AdDB7fe7043Dd2b1Ff710D41). Retry with an X-PAYMENT header (x402 v1, scheme exact, network base). Manifest: https://us-drug-shortages-mcp.donniertf.workers.dev/.well-known/x402. MCP clients may also send X-PAYMENT on tools/call.
Machine-readable pricing: https://us-drug-shortages-mcp.donniertf.workers.dev/pricing.json · Server card: https://us-drug-shortages-mcp.donniertf.workers.dev/.well-known/mcp

## Sources
- openFDA drug shortages endpoint (FDA), public domain

## Notes
From the FDA drug shortages database via openFDA. Availability changes quickly; confirm with suppliers and FDA. Not medical advice.
Contact: dmorrisonwebdesign@gmail.com. More UK data MCPs: https://github.com/donniertf-hub/uk-mcp-fleet