# FDA Drug Label Lookup via openFDA

> FDA Drug Label Lookup via openFDA is a paid API for AI agents from mcpfax-utility.bowling-anthony.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Retrieves structured FDA drug labeling information including uses, warnings, and dosage for a given drug via the openFDA API.

## Facts

- Endpoint: GET https://mcpfax-utility.bowling-anthony.workers.dev/v1/drug-label
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fda-drug-label-lookup-via-openfda-50df14b5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_t3us8mSUOuNiHSwydn_0Q

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-drug-label-lookup-via-openfda-50df14b5
```

Example prompt: What does the FDA drug label say about the uses, warnings, and dosage for metformin — pull the official openFDA structured labeling data for it.

## When to prefer this

Use this endpoint when you need authoritative, FDA-approved drug labeling information including official uses, contraindications, dosage instructions, and warnings. Prefer this over general web search or LLM knowledge when regulatory accuracy is required, such as for healthcare applications, compliance checks, or patient-facing drug information tools. This is backed by the official openFDA database, making it more reliable than scraped or summarized drug info sources.

## Known failure modes

- Drug not found in openFDA database — returns empty results or 404-like error
- Ambiguous drug name matching multiple products — may return unexpected label
- OpenFDA API upstream outage or rate limiting — results in timeout or error response
- NDC or identifier format invalid — returns validation error
- Generic vs. brand name confusion returning wrong formulation

## How this service works

FDA drug label — openFDA structured drug labeling (uses, warnings, dosage).

## Output

Returns structured FDA drug labeling data from openFDA, including approved uses (indications), warnings (including boxed warnings), contraindications, dosage and administration instructions, and other label sections as defined in the FDA structured product labeling format.

## 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"
    }
   },
   "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-drug-label-lookup-via-openfda-50df14b5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcpfax-utility.bowling-anthony.workers.dev](https://www.zero.xyz/host/mcpfax-utility.bowling-anthony.workers.dev/llms.txt)