# fittings FAERS Adverse Events Summary

> fittings FAERS Adverse Events Summary is a paid API for AI agents from fittings.sh, paid per call via x402, $0.00698/call, status unknown (last checked 2026-09-16).

Returns a summary of FDA Adverse Event Reporting System (FAERS) reports for a named drug, including total report count, top reactions, and distributions of reaction outcomes and seriousness.

## Facts

- Endpoint: GET https://fittings.sh/v1/faers/adverse-events
- Price: $0.00698/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fittings-faers-adverse-events-summary-caf10c19
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__VBLSO8D68an46STLK6w3

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 fittings-faers-adverse-events-summary-caf10c19
```

Example prompt: Pull the FDA adverse event summary for semaglutide — give me the top 10 most frequently reported reactions and how the outcomes break down, looking at reports from 2022-01-01 to 2024-12-31.

## When to prefer this

Use this endpoint when you need a quick, structured summary of FDA FAERS adverse event data for a specific drug — including reaction frequency rankings and outcome/seriousness distributions — without needing to query the FDA OpenFDA API directly. Particularly useful for pharmacovigilance workflows, drug safety research, or enriching clinical decision-making with regulatory signal data. Prefer this over raw FDA APIs when you want a pre-aggregated, agent-ready summary rather than raw report records.

## Known failure modes

- Drug name not found in FAERS — returns zero reports or empty results
- Invalid date format for from/to parameters — may return an error or unexpected range
- Limit parameter outside 1-100 range — may be clamped or return an error
- Ambiguous drug name matching too many or too few entries — results may not reflect intended drug
- FAERS data lag — most recent events may not yet be included in the database

## How this service works

A summary of FDA Adverse Event Reporting System reports naming a drug: total reports, the most frequently reported reactions, and the reaction outcome and seriousness distributions.

## Output

Returns total FAERS report count for the queried drug, a ranked list of the most frequently reported adverse reactions (up to the requested limit), and distributions showing how reactions broke down by outcome (e.g. hospitalization, death, recovery) and seriousness classification.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "drug"
     ],
     "properties": {
      "to": {
       "type": "string",
       "description": "Latest report receive date, YYYY-MM-DD"
      },
      "drug": {
       "type": "string",
       "description": "Drug name to match"
      },
      "from": {
       "type": "string",
       "description": "Earliest report receive date, YYYY-MM-DD"
      },
      "field": {
       "type": "string",
       "description": "Which name to match on: any (default), generic, brand or substance"
      },
      "limit": {
       "type": "number",
       "description": "Top reactions to return, 1-100, default 20"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fittings-faers-adverse-events-summary-caf10c19/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fittings.sh](https://www.zero.xyz/host/fittings.sh/llms.txt)