# Quote Verifier — agent-tools-7936.onrender.com

> Quote Verifier — agent-tools-7936.onrender.com is a paid API for AI agents from agent-tools-7936.onrender.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-10).

Checks whether a specific claim or quoted statistic is supported by the text at a given source URL or PDF.

## Facts

- Endpoint: GET https://agent-tools-7936.onrender.com/verify/quote?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quote-verifier-agent-tools-7936-onrender-com-55086228
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HkdrzM3W9Q1aIO_crvuMR

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 quote-verifier-agent-tools-7936-onrender-com-55086228
```

Example prompt: Can you check if the claim '20% of startups land their first paying customer within 30 days' is actually supported by this article: https://example.com/startup-report? I want to verify before I cite it.

## When to prefer this

Use this endpoint when an AI agent needs to ground-truth a specific claim, statistic, or quote against a primary source URL or PDF before acting on it, citing it, or paying for content. Ideal for research pipelines, content audits, citation checkers, and anti-hallucination workflows where the exact source document is known.

## Known failure modes

- Source URL is inaccessible, paywalled, or returns an error — endpoint may return an unsupported verdict or an error
- PDF is malformed or not parseable — extraction may fail
- Claim is too vague or paraphrased — may return NOT SUPPORTED even if a related statement exists
- Source page content has changed since the claim was made — verdict reflects current page content only
- Very long PDFs may result in timeout or incomplete coverage

## How this service works

Primary-source tools for AI agents: verify before you pay, cite, or repeat.

## Output

A JSON object with a 'verdict' field (e.g. SUPPORTED or NOT SUPPORTED) and a 'best_matches' array listing the actual sentences from the source page that most closely match the claim, along with any numbers from those sentences that matched the claim.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "claim",
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "Source page or PDF."
      },
      "claim": {
       "type": "string",
       "description": "The statement to check, in your words."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "verdict": {
       "type": "string"
      },
      "best_matches": {
       "type": "array"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "verdict": "SUPPORTED",
  "best_matches": [
   {
    "sentence": "...20% now land their first paying customer within 30 days...",
    "numbers_matched": [
     "20",
     "30"
    ]
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quote-verifier-agent-tools-7936-onrender-com-55086228/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-tools-7936.onrender.com](https://www.zero.xyz/host/agent-tools-7936.onrender.com/llms.txt)