# Services from 402registry.com on Zero

> 402registry.com serves 5 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/402registry.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/402registry.com/health.json

## Services

- [402registry Catalog Snapshot](https://www.zero.xyz/c/402registry-catalog-snapshot-dc2f0758/llms.txt): $0.05/call via x402. Returns a full JSON snapshot of every site in the 402registry catalog, including per-site AI crawler findings, severity, tech stack, page title, and raw crawler observations (bot status codes, robots.txt, sitemap, llms.txt).
- [402registry AI Crawler Discoverability Audit (two-check pack)](https://www.zero.xyz/c/402registry-ai-crawler-discoverability-audit-two-check-pack-61523baa/llms.txt): $0.1/call via x402. Runs a pay-per-check audit of a website to reveal exactly what AI crawlers (GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot) see, returning a score, verdict, and optional public catalog listing — purchased as a two-check pack via x402 micropayment.
- [402registry AI Crawler Discoverability Audit (Pack Four)](https://www.zero.xyz/c/402registry-ai-crawler-discoverability-audit-pack-four-d5a39d0b/llms.txt): $0.1/call via x402. Pay-per-check audit that reports what AI crawlers (GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot) actually see on a given site, returning a verdict and optionally a dated badge and registry listing.
- [402registry Quick AI Crawler Visibility Check](https://www.zero.xyz/c/402registry-quick-ai-crawler-visibility-check-1ced046e/llms.txt): $0.1/call via x402. Performs a fast, cheap ($0.1 USDC) check of whether AI crawlers (GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot) can actually see a given site, returning a score and top five critical findings.
- [402registry Agent Visibility Check (Single)](https://www.zero.xyz/c/402registry-agent-visibility-check-single-a4e2cc5b/llms.txt): $0.1/call via x402. Checks whether a specified website is visible to major AI crawlers (GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot) and returns a dated badge and registry listing if it passes.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)