# ArtifactGuard PDF Claim Verifier

> ArtifactGuard PDF Claim Verifier is a paid API for AI agents from artifactguard-kl4hfo6j2q-as.a.run.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Verifies AI-generated claims against a public HTTPS PDF source and returns a signed evidence receipt

## Facts

- Endpoint: POST https://artifactguard-kl4hfo6j2q-as.a.run.app/v1/evidence/pdf
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/artifactguard-pdf-claim-verifier-cc72f400
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_chw7Pp2RcNRPSAqmIyDnC

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 artifactguard-pdf-claim-verifier-cc72f400 -d '<json body>'
```

Example prompt: Can you verify whether the claim 'Global CO2 emissions rose by 1.1% in 2023' is actually supported by this PDF report at https://example.org/emissions-report-2023.pdf, and give me a signed evidence receipt I can keep as proof?

## When to prefer this

Choose this endpoint when you need to verify AI-generated claims specifically sourced from or attributable to a PDF document (research papers, official reports, contracts, regulatory filings). Use this over the web-page variant when the authoritative source is a PDF rather than an HTML page. Ideal when you need a cryptographically signed, auditable receipt for compliance, legal, or trust-and-safety workflows rather than just a boolean check.

## Known failure modes

- PDF URL is not publicly accessible or returns non-200 HTTP status
- URL does not point to a valid PDF document
- PDF is password-protected or encrypted
- PDF is too large to process within request limits
- Claim is ambiguous and cannot be definitively matched or refuted
- Network timeout when fetching the remote PDF
- Malformed claim input or missing required fields

## How this service works

Verify AI-generated claims against a public HTTPS PDF and receive a signed evidence receipt.

## Output

A signed evidence receipt containing the verification outcome (supported, not supported, or inconclusive), the relevant excerpt(s) from the PDF that match or contradict the claim, a cryptographic signature attesting to the verification, and metadata including the source PDF URL and timestamp.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/artifactguard-pdf-claim-verifier-cc72f400/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from artifactguard-kl4hfo6j2q-as.a.run.app](https://www.zero.xyz/host/artifactguard-kl4hfo6j2q-as.a.run.app/llms.txt)