# Public Data Baseline Snapshot & Hash

> Public Data Baseline Snapshot & Hash is a paid API for AI agents from 9dmb38pvlp8dr1d3rtfjpe934o.ingress.h4i-dedicated.eu-sw-2.digitalfrontier.so, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Captures a timestamped HTTPS snapshot of a public URL with a SHA-256 hash, returning private monitor credentials for future change detection checks.

## Facts

- Endpoint: POST https://9dmb38pvlp8dr1d3rtfjpe934o.ingress.h4i-dedicated.eu-sw-2.digitalfrontier.so/api/seller/v4/public-data/baseline
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/public-data-baseline-snapshot-hash-789c9b96
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_j-bCquJ-mYzFwfwVcedK9

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 public-data-baseline-snapshot-hash-789c9b96 -d '<json body>'
```

Example prompt: Take a cryptographic baseline snapshot of https://www.sec.gov/rules/final.htm right now — capture a SHA-256 hash of its current content and give me back the monitor credentials so I can check it for changes later.

## When to prefer this

Choose this endpoint when you need to establish a cryptographic anchor for a public webpage or dataset before starting ongoing monitoring — specifically when you need a SHA-256 hash and timestamped proof of the initial state, plus credentials for future change-check API calls. Prefer this over general web scrapers when auditability, integrity verification, or downstream monitoring are required.

## Known failure modes

- Target URL is not publicly accessible or requires authentication — returns an error indicating the resource could not be fetched
- Target URL returns a non-200 HTTP status — snapshot cannot be established
- Network timeout reaching the target HTTPS resource
- Invalid or malformed URL provided as input
- Target resource returns non-text or binary content that cannot be reliably hashed

## How this service works

Capture a timestamped public HTTPS source snapshot and SHA-256 hash, returning private monitor credentials for later checks.

## Output

Returns private monitor credentials (e.g. a monitor ID or token) tied to the captured baseline, along with the SHA-256 hash of the page content, the timestamp of the capture, and metadata about the snapshotted HTTPS source — enabling authenticated follow-up change-check calls against the same resource.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/public-data-baseline-snapshot-hash-789c9b96/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 9dmb38pvlp8dr1d3rtfjpe934o.ingress.h4i-dedicated.eu-sw-2.digitalfrontier.so](https://www.zero.xyz/host/9dmb38pvlp8dr1d3rtfjpe934o.ingress.h4i-dedicated.eu-sw-2.digitalfrontier.so/llms.txt)