# x402.lagaceta.net Citation Check

> x402.lagaceta.net Citation Check is a paid API for AI agents from x402.lagaceta.net, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-13).

Verifies and validates citations in text, checking their accuracy, existence, and proper attribution

## Facts

- Endpoint: POST https://x402.lagaceta.net/v1/citation-check?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-lagaceta-net-citation-check-875f90e7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pHy0Q9ncLLArVh_7btlX3

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 x402-lagaceta-net-citation-check-875f90e7 -d '<json body>'
```

Example prompt: Can you check whether this citation in my article is accurate — 'Smith et al. (2021) found that 73% of respondents reported improved outcomes' — and verify the source actually supports that claim?

## When to prefer this

Choose this endpoint when you need to verify the accuracy and existence of specific citations, references, or sourced claims — especially in academic, journalistic, or legal contexts where citation integrity matters. It is particularly useful before publishing content that relies on cited sources, or when auditing existing documents for citation errors.

## Known failure modes

- Citation source is behind a paywall or inaccessible, returning unverifiable status
- Malformed or incomplete citation input that cannot be parsed
- Source URL no longer exists or has moved, causing dead-link error
- Ambiguous citation with insufficient detail to locate the original source
- Network timeout when fetching and verifying external source content

## How this service works

PE paid route /v1/citation-check

## Output

The agent receives a structured verification result indicating whether the citation is valid, whether the cited source exists, whether the stated claim or statistic matches what the source actually says, and any identified discrepancies or errors in the citation formatting or content.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-lagaceta-net-citation-check-875f90e7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.lagaceta.net](https://www.zero.xyz/host/x402.lagaceta.net/llms.txt)