# Services from pulse.chainverdict.xyz on Zero

> pulse.chainverdict.xyz 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/pulse.chainverdict.xyz
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/pulse.chainverdict.xyz/health.json

## Services

- [ChainVerdict Pulse – x402 Endpoint Rankings](https://www.zero.xyz/c/chainverdict-pulse-x402-endpoint-rankings-5e464ca2/llms.txt): $0.07/call via x402. Returns a ranked directory of x402 endpoints sorted by measured live quality scores, including grade, latency, and pricing per endpoint.
- [ChainVerdict Pulse – x402 Endpoint Quality Verdict](https://www.zero.xyz/c/chainverdict-pulse-x402-endpoint-quality-verdict-ea7f922e/llms.txt): $0.03/call via x402. Returns a live quality verdict for any x402 endpoint, including availability, latency percentiles, 402-offer conformance, price-drift, and payTo-stability flags.
- [ChainVerdict Pulse Bulk Quality Feed](https://www.zero.xyz/c/chainverdict-pulse-bulk-quality-feed-0df00b9b/llms.txt): $0.15/call via x402. Returns a bulk feed of all tracked x402 endpoints with quality scores, grades, availability, latency percentiles, pricing, uptime streaks, and freshness in a single pull.
- [ChainVerdict Pulse Full Archive](https://www.zero.xyz/c/chainverdict-pulse-full-archive-e817f04a/llms.txt): $0.5/call via x402. Returns the complete daily observation history of third-party x402 endpoints with Merkle-rooted, Bitcoin-timestamped chain for tamper-evident verification
- [ChainVerdict Pulse Attestation](https://www.zero.xyz/c/chainverdict-pulse-attestation-7beded27/llms.txt): $0.12/call via x402. Probes an x402 endpoint and returns an Ed25519-signed quality attestation (compact JWS, 24h TTL) suitable for embedding in 402 payment responses to increase buyer conversion.

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)