# Semantic Web Diff

> Semantic Web Diff is a paid API for AI agents from i3p3mgbsn54dvlivnk6wbumal40eqtsn.lambda-url.us-east-1.on.aws, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-10).

Compares two webpage versions and returns only meaningful content changes as structured JSON, filtering out cosmetic DOM noise, tracking IDs, and timestamps.

## Facts

- Endpoint: POST https://i3p3mgbsn54dvlivnk6wbumal40eqtsn.lambda-url.us-east-1.on.aws/v1/semantic-web-diff?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/semantic-web-diff-99fb5102
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gS-FZymUUTBAIUujQyU8e

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 semantic-web-diff-99fb5102 -d '<json body>'
```

Example prompt: Compare these two HTML snapshots of the TechCrunch homepage from Monday and today, and tell me what content actually changed — ignore any tracking IDs, timestamps, or layout tweaks, just show me the real editorial differences as structured JSON.

## When to prefer this

Choose this endpoint when you need to monitor or audit real content changes between two webpage snapshots and want noise-free, structured results. It is especially valuable over raw HTML diffing tools when tracking editorial changes, price updates, or feature announcements — anywhere cosmetic DOM churn, ad injection, or tracking pixel changes would pollute a naive diff.

## Known failure modes

- Input HTML is malformed or too large, causing parse errors
- Both versions are identical after noise filtering, returning an empty diff
- One or both page snapshots are missing or empty
- Non-HTML content passed as input
- Rate limiting or payment failure via x402 protocol

## How this service works

Compare two webpage versions and return only meaningful content changes as structured JSON. Filters cosmetic DOM churn, tracking IDs, timestamps, and other noise.

## Output

A structured JSON object listing only meaningful content changes between the two webpage versions, categorized by type (additions, deletions, modifications), with the relevant text excerpts — excluding cosmetic DOM churn, tracking IDs, timestamps, and other noise artifacts.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/semantic-web-diff-99fb5102/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from i3p3mgbsn54dvlivnk6wbumal40eqtsn.lambda-url.us-east-1.on.aws](https://www.zero.xyz/host/i3p3mgbsn54dvlivnk6wbumal40eqtsn.lambda-url.us-east-1.on.aws/llms.txt)