# Services from www.0816.cn on Zero

> www.0816.cn serves 4 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/www.0816.cn
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/www.0816.cn/health.json

## Services

- [Sentinel Token Safety — ERC-20 Tax & Transfer Restriction Scanner](https://www.zero.xyz/c/sentinel-token-safety-erc-20-tax-transfer-restriction-scanner-0fa3d098/llms.txt): $0.02/call via x402. Scans any ERC-20 token contract on Base for buy/sell taxes, transfer restrictions, cooldowns, blacklist/whitelist functions, and returns a trade-safety verdict to protect agents from fee-draining tokens.
- [Sentinel Token Safety](https://www.zero.xyz/c/sentinel-token-safety-68decb42/llms.txt): $0.1/call via x402. Returns a single ALLOW/WARN/BLOCK safety verdict for any ERC-20 token contract on Base before a buy, swap, or approval
- [Sentinel Contract Safety — EVM Proxy Upgrade Checker](https://www.zero.xyz/c/sentinel-contract-safety-evm-proxy-upgrade-checker-8e182d35/llms.txt): $0.02/call via x402. Checks whether an EVM contract on Base is upgradeable, who controls the upgrade, and what the upgrade risk level is by reading EIP-1967 proxy slots directly from chain state.
- [Sentinel Token Safety — ERC-20 Rug Risk Scanner for Base](https://www.zero.xyz/c/sentinel-token-safety-erc-20-rug-risk-scanner-for-base-a9918a0e/llms.txt): $0.02/call via x402. Scans any ERC-20 token contract on Base for rug-pull risk, returning honeypot detection, token tax, LP lock status, hidden mint, owner renouncement, and a 0-100 rug risk score.

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)