# Citiview Citation Checker

> Citiview Citation Checker is a paid API for AI agents from agents.citiviewgroup.com, paid per call via x402, $0.011/call, status unknown (last checked 2026-10-14).

Verifies whether a URL's source content actually supports a given claim, returning a verdict (supported, partial, not supported, or contradicted) with the deciding quote.

## Facts

- Endpoint: GET https://agents.citiviewgroup.com/v1/citecheck?utm_source=zero.xyz
- Price: $0.011/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/citiview-citation-checker-d16a0553
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_flfLi7P-AcJvin0RBckyw

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 citiview-citation-checker-d16a0553
```

Example prompt: Can you check whether this URL actually supports the claim I'm making? The claim is 'Coffee consumption reduces the risk of type 2 diabetes by 25%' and the source is https://www.healthjournal.org/coffee-diabetes-study — tell me if it's supported, partial, not supported, or contradicted, and show me the quote that decides it.

## When to prefer this

Choose this endpoint when you need to verify whether a specific URL's content actually backs up a specific claim — ideal for fact-checking, citation auditing, or research integrity workflows. It is distinct from general search or answer generation: you already have both the claim and the URL and want a verdict with evidence. Prefer it over manual reading when checking multiple citations at once (up to 6 per call).

## Known failure modes

- URL is inaccessible, paywalled, or returns an error — verdict cannot be determined
- Claim text is ambiguous or too vague for reliable matching against source content
- Source page content is dynamic/JavaScript-rendered and cannot be read as static HTML
- Batch exceeds 6 claim-URL pairs — request is rejected or only partial results returned
- Network timeout fetching the source URL — no verdict returned for that citation

## How this service works

Citation checker: for each claim and the URL cited for it, reads the source and says whether it really supports the claim (supported, partial, not supported, contradicted) with the deciding quote. Priced $0.005 + $0.006 per citation (up to 6). Also callable as GET with the same fields as query parameters.

## Output

For each claim-URL pair, the endpoint returns a verdict from four categories (supported, partial, not supported, contradicted) along with the specific quote from the source page that determines the verdict. Up to 6 claim-citation pairs can be checked in a single call.

## 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",
     "properties": {
      "url": {
       "type": "string"
      },
      "claim": {
       "type": "string"
      },
      "citations": {
       "type": "string",
       "description": "JSON [{claim, url}] up to 6"
      }
     }
    }
   },
   "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/citiview-citation-checker-d16a0553/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agents.citiviewgroup.com](https://www.zero.xyz/host/agents.citiviewgroup.com/llms.txt)