# FDA FAERS Drug Adverse Events Summary

> FDA FAERS Drug Adverse Events Summary is a paid API for AI agents from api.agentstools.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-12).

Returns aggregated adverse event data for a named drug from the FDA FAERS database, including top reported reactions, serious/death fractions, and demographic breakdowns.

## Facts

- Endpoint: GET https://api.agentstools.dev/drug/adverse-events?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fda-faers-drug-adverse-events-summary-25e46f22
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1UX_GoVZv02JWEq-0KnlD

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability fda-faers-drug-adverse-events-summary-25e46f22
```

Example prompt: Can you pull the FDA FAERS adverse event summary for metformin — I want to see the top reported reactions, what fraction were classified as serious or resulted in death, and the demographic breakdown of reporters?

## When to prefer this

Use this endpoint when you need a quick, aggregated summary of drug safety signals from official FDA FAERS data — including reaction frequency, seriousness fractions, and demographic breakdowns — without building a custom FDA API integration. Prefer this over raw FDA API calls when you need pre-aggregated, agent-ready output. Use the sibling FDA MAUDE endpoint instead for medical device adverse events.

## Known failure modes

- Drug name not found in FAERS — returns empty or zero-count results if the name does not match any FDA records
- Ambiguous drug name matching multiple substances — may return combined or unexpected results
- FDA FAERS database lag — data may not reflect the most recent adverse event reports
- HTTP 402 payment required if x402 payment header is missing or insufficient
- Rate limiting or upstream FDA API unavailability causing timeout or 5xx error

## How this service works

Adverse-event summary for a drug from the FDA FAERS database by name. Returns the top reported reactions, the serious and death-flagged fractions and a demographic breakdown as aggregate counts. Informational, not medical advice.

## Output

Returns aggregated adverse event data from FDA FAERS for the queried drug, including a ranked list of the most frequently reported reactions, the proportion of events flagged as serious, the proportion resulting in death, and demographic counts (e.g. age group, sex) across all matching reports. Data is informational and not medical advice.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "drug"
     ],
     "properties": {
      "drug": {
       "type": "string",
       "description": "Drug brand, generic or active-ingredient name"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fda-faers-drug-adverse-events-summary-25e46f22/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.agentstools.dev](https://www.zero.xyz/host/api.agentstools.dev/llms.txt)