# RealCite Drug — FDA Drug Record Verifier

> RealCite Drug — FDA Drug Record Verifier is a paid API for AI agents from goodsong.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Verifies whether an FDA drug record (approval, NDC listing, or recall) actually exists and whether a given name matches the canonical record, checked against openFDA.

## Facts

- Endpoint: POST https://goodsong.dev/verify/drug
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/realcite-drug-fda-drug-record-verifier-4f08af8b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-L_zut_98f2IiJDc-Iolc

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 realcite-drug-fda-drug-record-verifier-4f08af8b -d '<json body>'
```

Example prompt: Can you verify that FDA approval application NDA021457 actually exists and that the sponsor name listed is 'Pfizer Inc'? I want to make sure this drug approval citation wasn't fabricated.

## When to prefer this

Use this endpoint when an AI agent, researcher, or automated pipeline needs to fact-check a specific FDA drug record citation — particularly to detect hallucinated or misattributed drug approvals, NDC codes, or recall numbers. Prefer it over general web search when you need a deterministic, structured existence-and-name-match check directly against the openFDA database rather than a human-readable document retrieval.

## Known failure modes

- Record not found in openFDA — identifier may be fabricated or incorrectly formatted
- Name mismatch — the identifier exists but the expected_name does not match the canonical record
- Invalid claim_type value supplied outside the allowed enum
- openFDA API unavailable or rate-limited, causing lookup failure
- Malformed identifier format (e.g. wrong NDC format) causing no results

## How this service works

Verify an FDA drug record: given a claim_type (approval, ndc, or recall) and its identifier, does that record actually exist, and does the given name match the canonical record? Checked against openFDA. Catches a fabricated or misattributed drug approval, NDC listing, or recall citation. Existence/status only, not medical advice.

## Output

Returns whether the specified FDA record (approval, NDC, or recall) exists in openFDA, whether the provided expected_name matches the canonical record's name, and any relevant mismatch or non-existence flags. Does not provide medical advice, only existence and name-match status.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "claim_type": {
   "enum": [
    "approval",
    "ndc",
    "recall"
   ],
   "type": "string",
   "description": "Which FDA record type to check."
  },
  "identifier": {
   "type": "string",
   "description": "The application_number (approval), product_ndc (ndc), or recall_number (recall)."
  },
  "expected_name": {
   "type": "string",
   "description": "Optional name to cross-check: brand/sponsor name for approval/ndc, recalling firm for recall."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/realcite-drug-fda-drug-record-verifier-4f08af8b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from goodsong.dev](https://www.zero.xyz/host/goodsong.dev/llms.txt)