# ChainRay — On-Chain Intelligence for AI Agents

> ChainRay — On-Chain Intelligence for AI Agents is a paid API for AI agents from chainray.online, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

## Facts

- Endpoint: POST https://chainray.online/watch-diff/%7BwatchId%7D
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/watch-diff-7bwatchid-7d-9fb89701
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8dtqotFTwOJOoHFEnqNSu

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 watch-diff-7bwatchid-7d-9fb89701 -d '<json body>'
```

## How this service works

The most complete blockchain data and intelligence service for AI agents. 93 endpoints across 46 chains, from gas fees to DeFi analytics, with real-time streams, intent routing, and verifiable proofs. Pay-per-request via x402.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/watch-diff-7bwatchid-7d-9fb89701/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chainray.online](https://www.zero.xyz/host/chainray.online/llms.txt)