# AttestPage Citation Verifier – Multi-URL

> AttestPage Citation Verifier – Multi-URL is a paid API for AI agents from s2h6qt73jtzlgbgnnfacln2poq.srv.us, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-30).

Verifies up to 10 quote-and-URL pairs against live web pages, returning exact, fuzzy, or passage-based match results with a single signed receipt.

## Facts

- Endpoint: POST https://s2h6qt73jtzlgbgnnfacln2poq.srv.us/v1/verify/citations?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/attestpage-citation-verifier-multi-url-1cc526f0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_J9Z7ulWIwl-w-WKoH0iye

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 attestpage-citation-verifier-multi-url-1cc526f0 -d '<json body>'
```

Example prompt: Can you check these three citations from my AI-generated report — use fuzzy matching with a 0.9 threshold and verify that each quote actually appears on the linked page, then give me a single signed receipt for the whole batch?

## When to prefer this

Choose this endpoint when you need to verify multiple citation-URL pairs in a single call with one shared signed receipt. It is more cost-effective than calling the single-citation endpoint repeatedly when you have 2–10 pairs to check. Prefer the single-citation endpoint ($0.01) for one-off checks, or the single-page multi-quote endpoint ($0.02) when all quotes reference the same page. Use this endpoint when citations span different URLs and you need a batch attestation.

## Known failure modes

- 422 Unprocessable Entity if none of the submitted URLs resolve (no charge)
- Individual citations marked as 'gone' or 'unreadable' if the page is inaccessible but others succeed
- Quote exceeds 1,000 characters after normalisation — rejected
- URL exceeds 2,048 characters — rejected
- match 'passages' used with case_sensitive:true — rejected
- threshold below 0.5 or above 1.0 — rejected
- More than 10 citations submitted — rejected
- Payment failure via x402 protocol — request not processed

## How this service works

Checks up to 10 quote and URL pairs on live pages: exact, fuzzy or none, one receipt. US$0.10 per call; POST pairs.

## Output

For each citation pair, the endpoint returns a match status (exact, fuzzy, none, or passage evidence), similarity scores, text offsets within the page, and a single timestamped signed receipt covering the entire batch. Dead domains are reported as results rather than errors unless all URLs fail to resolve.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "match": {
   "enum": [
    "exact",
    "fuzzy",
    "passages"
   ],
   "type": "string",
   "description": "For every citation: exact; fuzzy (default), which also accepts small differences; or passages, for a paraphrased claim: the 3 passages that share most of its words, scored, as evidence for you to judge (not a verdict)."
  },
  "citations": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "url",
     "quote"
    ],
    "properties": {
     "url": {
      "type": "string",
      "description": "http(s) URL of the cited page (max 2,048 characters)."
     },
     "quote": {
      "type": "string",
      "description": "Text the answer says is on that page, or with match \"passages\" the claim it says the page supports (max 1,000 characters after normalisation)."
     }
    },
    "additionalProperties": false
   },
   "maxItems": 10,
   "minItems": 1,
   "description": "1 to 10 citations. Each URL is fetched once however many quotes cite it. Dead domains are reported as results; if none resolves, 422 and no charge."
  },
  "threshold": {
   "type": "number",
   "maximum": 1,
   "minimum": 0.5,
   "description": "Fuzzy similarity needed, default 0.9."
  },
  "case_sensitive": {
   "type": "boolean",
   "description": "Default false; must be false with match \"passages\"."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/attestpage-citation-verifier-multi-url-1cc526f0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from s2h6qt73jtzlgbgnnfacln2poq.srv.us](https://www.zero.xyz/host/s2h6qt73jtzlgbgnnfacln2poq.srv.us/llms.txt)