# OneShot Agent API – Drug Adverse Events Lookup

> OneShot Agent API – Drug Adverse Events Lookup is a paid API for AI agents from win.oneshotagent.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-19).

Returns the most frequently reported adverse reactions for a named drug from FDA adverse event reports, ranked by report count.

## Facts

- Endpoint: POST https://win.oneshotagent.com/v1/tools/lookup/product-drug-adverse-events?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/oneshot-agent-api-drug-adverse-events-lookup-027e51a6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_E7sFGZtzbeWV36IO0GEYY

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 oneshot-agent-api-drug-adverse-events-lookup-027e51a6 -d '<json body>'
```

Example prompt: What are the top 10 most reported adverse reactions for Ozempic according to FDA adverse event data?

## When to prefer this

Choose this endpoint when you need structured, quantified FDA adverse event data for a specific drug ranked by frequency — ideal for pharmacovigilance research, patient safety summaries, or comparing drug risk profiles. It differs from general web search by returning structured report counts from the official FAERS dataset rather than unstructured text.

## Known failure modes

- Drug name not found in FAERS database — returns empty reactions array
- Misspelled or brand/generic name mismatch — may return no results if name doesn't match report entries exactly
- Limit parameter out of range — may default or return an error
- Network or payment processing failure — 402 payment required if USDC not available

## How this service works

List the reactions most often named in adverse event reports sent to the US Food and Drug Administration for a drug, each with its number of reports.

## Output

A JSON object containing the queried drug name and an array of adverse reaction objects, each with the reaction name and the number of FDA adverse event reports mentioning it, sorted by report count descending.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "integer",
   "description": "The most reactions to return. From 1 to 25. Defaults to `10`."
  },
  "drug_name": {
   "type": "string",
   "description": "The drug's name as it appears on the reports, for example Ozempic or metformin. 2 to 100 characters."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "drug_name": "Ozempic",
  "reactions": [
   {
    "reports": 9751,
    "reaction": "Nausea"
   },
   {
    "reports": 6949,
    "reaction": "Off label use"
   },
   {
    "reports": 6341,
    "reaction": "Vomiting"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/oneshot-agent-api-drug-adverse-events-lookup-027e51a6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from win.oneshotagent.com](https://www.zero.xyz/host/win.oneshotagent.com/llms.txt)