# SourceMint Citation Auditor

> SourceMint Citation Auditor is a paid API for AI agents from sourcemint-api.nap6281.chatgpt.site, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Verifies claims in an answer or report against a set of provided source URLs, returning per-claim support verdicts, source coverage, and a tamper-evident bundle hash.

## Facts

- Endpoint: POST https://sourcemint-api.nap6281.chatgpt.site/api/audit-citations
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sourcemint-citation-auditor-b8f8023b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PFT8_OEBuUfZ6a1RrHE2A

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 sourcemint-citation-auditor-b8f8023b -d '<json body>'
```

Example prompt: Check whether the claims in this research summary are actually supported by the sources it cites — here's the answer: 'Renewable energy accounted for 30% of global electricity in 2023, with solar growing 20% year-on-year.' And here are the two URLs it references: https://iea.org/reports/renewables-2023 and https://irena.org/solar-2023.

## When to prefer this

Choose this endpoint when you need to verify whether specific textual claims are actually backed by cited web sources — especially for AI-generated outputs, research summaries, journalism, or student work where citation integrity matters. It is distinct from general web search or fact-checking APIs because it operates on a provided answer-plus-URLs pair, returns per-claim verdicts, and produces a cryptographic proof bundle. Prefer it over generic scraping tools when you need structured claim-level attribution and auditability rather than raw page content.

## Known failure modes

- Cited URL is paywalled or returns a non-200 HTTP status — source will be marked unresolvable and claims against it may be unsupported
- Answer contains no verifiable factual claims — claims array returns empty
- URL array is empty — no source evidence can be checked, all claims unsupported
- Network timeout fetching a slow source page — partial coverage returned
- Payment not received or x402 handshake fails — request rejected before processing

## How this service works

Wallet-native x402 APIs for web extraction, claim verification, and citation auditing.

## Output

Returns a JSON object containing: a proof bundle with a SHA-256 hash for tamper-evidence; an array of individual claim verdicts (supported/unsupported/partial); an array of source objects with extracted content; and a summary with total claim count, number supported, number unsupported, number partial, and a 0–1 coverage score.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "urls",
  "answer"
 ],
 "properties": {
  "urls": {
   "type": "array",
   "description": "Public URLs cited by the answer"
  },
  "answer": {
   "type": "string",
   "description": "Answer or report whose claims should be checked"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "proof": {
   "bundleSha256": "0000000000000000000000000000000000000000000000000000000000000000"
  },
  "claims": [],
  "sources": [],
  "summary": {
   "claims": 4,
   "partial": 0,
   "coverage": 0.75,
   "supported": 3,
   "unsupported": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sourcemint-citation-auditor-b8f8023b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sourcemint-api.nap6281.chatgpt.site](https://www.zero.xyz/host/sourcemint-api.nap6281.chatgpt.site/llms.txt)