# TariffMonkee Verify Citation

> TariffMonkee Verify Citation is a paid API for AI agents from tariffmonkee.com, paid per call via x402, $0.025/call, status unknown (last checked 2026-09-13).

Verifies whether a cited source or claim is accurate and traceable to the referenced content, returning a validation result

## Facts

- Endpoint: GET https://tariffmonkee.com/paid/verify-citation
- Price: $0.025/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tariffmonkee-verify-citation-efa29657
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ido4A0J7XtAnGzXctyg81

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 tariffmonkee-verify-citation-efa29657
```

Example prompt: Can you verify this citation for me — it claims the WHO report at that URL says COVID-19 mortality dropped 40% in 2022, but I want to confirm the source actually backs that up?

## When to prefer this

Use this endpoint when you need to verify that a specific claim or quote is genuinely supported by a cited source URL — especially useful for catching AI hallucinations in generated content, auditing research references, or fact-checking news citations. Prefer this over a generic web search or content-fetch endpoint when the task is specifically citation validation rather than general information retrieval.

## Known failure modes

- Source URL is unreachable or returns a non-200 status, resulting in an unverifiable result
- Paywalled or login-gated source content cannot be accessed for comparison
- Citation text is too vague to match against source content
- Source content is in a non-parseable format (e.g. scanned PDF image)
- Payment not settled via x402 protocol returns HTTP 402

## How this service works

Small, single-purpose web data APIs that AI agents pay for per call in USDC over the x402 protocol (HTTP 402). No accounts, no API keys, no subscriptions.

## Output

Returns a verification result indicating whether the cited claim is supported by the referenced source, including match confidence, relevant excerpts from the source, and a validity status (verified, unverified, or hallucinated/mismatch).

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "GET"
     ]
    }
   },
   "required": [
    "type",
    "method"
   ],
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tariffmonkee-verify-citation-efa29657/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tariffmonkee.com](https://www.zero.xyz/host/tariffmonkee.com/llms.txt)