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FDA Adverse Event Reports
x402
FDA Adverse Event Reports is a paid API for AI agents from x402-filings.datalayer.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-12).
Returns ranked adverse event reaction counts for a drug or medical device from the FDA FAERS and MAUDE systems, with report totals and interpretation caveats.
Price / call$0.02
Success—
StatusUnknown
How this service works
Adverse event reports for a drug or medical device from the FDA's FAERS and MAUDE systems: total report count and the most frequently reported reactions, ranked. Returns the interpretation caveat with the data — these are voluntary reports, a report does not establish causation, and counts scale with how widely a product is used.
Output
Returns the total number of adverse event reports filed for the queried drug or device, a ranked list of the most frequently reported reactions (up to the requested limit), and a standard interpretation caveat noting that reports are voluntary, do not establish causation, and that counts scale with product usage prevalence.
Example use cases
Drug safety due diligence for investors
“What are the top 15 adverse reactions reported in FDA FAERS for Keytruda, and how many total reports are there? I need this for a pharma investment brief.”
Medical device risk review
“Look up the most commonly reported adverse events for insulin pumps in the FDA's MAUDE system — give me the top 10 reactions ranked by frequency.”
Patient medication research
“Can you check the FDA adverse event database for methotrexate and tell me what the top 5 most reported reactions are and how many reports exist total?”
Technical details
Endpoint
GEThttps://x402-filings.datalayer.workers.dev/v1/fda/adverse-events?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need structured, ranked FDA pharmacovigilance signal data for a specific drug or medical device without building a direct FDA API integration. It is ideal for safety due diligence, regulatory research, competitive intelligence, or patient-facing drug information tools. Prefer this over direct FDA API access when you want pre-ranked reaction data with caveats included and per-call micropayment billing via x402.
Side effects
- Drug or device name not found in FDA systems — returns empty results or zero reports
- Ambiguous name matching multiple drugs or devices — may return aggregated or unexpected results
- Limit parameter out of range (must be 1–50) — returns validation error
- Neither drug nor device parameter provided — required field missing error
- FDA data source temporarily unavailable — upstream service error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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