# Public Dataset Change Tracker

> Public Dataset Change Tracker is a paid API for AI agents from 9dmb38pvlp8dr1d3rtfjpe934o.ingress.h4i-dedicated.eu-sw-2.digitalfrontier.so, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Detects and reports changes in public JSON, CSV, XML, or text datasets using deterministic normalization and cryptographic hashes.

## Facts

- Endpoint: POST https://9dmb38pvlp8dr1d3rtfjpe934o.ingress.h4i-dedicated.eu-sw-2.digitalfrontier.so/api/seller/v4/public-data/dataset-change
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/public-dataset-change-tracker-b8216fd4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DjXOnbtqsyjjdnOon2XxB

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-dataset-change-tracker-b8216fd4 -d '<json body>'
```

Example prompt: Check if this public JSON dataset at https://data.example.gov/api/population.json has changed since my last snapshot, and give me a normalized diff with hashes showing exactly what rows were added, removed, or modified.

## When to prefer this

Choose this endpoint when you need structured, deterministic change detection on public JSON, CSV, XML, or text datasets — especially when you need cryptographic hashes for integrity verification or normalized diffs for reliable comparison across schema variations. Prefer it over generic web-page change detectors when the source is structured data rather than HTML prose.

## Known failure modes

- URL not publicly accessible — returns error indicating unreachable source
- Unsupported data format — returns error if content type cannot be parsed
- Dataset too large — may return timeout or size-limit error
- Network or upstream source error — returns fetch failure with status details
- Malformed data — normalization may fail if source is corrupt or inconsistent

## How this service works

Track changes in public JSON, CSV, XML or text datasets with deterministic normalization and hashes.

## Output

Returns a structured change report including a deterministic hash of the current dataset, normalized before/after evidence of any changed fields or records, a diff summary highlighting additions/removals/modifications, and a timestamp of when the check was performed.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/public-dataset-change-tracker-b8216fd4/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)