# Sentinel

> Keyless, read-only Robinhood Chain (chainId 4663) reader for agents and humans. GET-only, block-stamped, never signs or broadcasts.

## API
- [OpenAPI 3.1 spec](https://sentinelhood.com/openapi.json): one operation, `GET /api/service?action=network|address|transaction|aeon|contributions|token|launches|shiplog&value=...`. Share links: `https://sentinelhood.com/?ca=0x...` opens the token check for that address.

## Aeon
- [robinhood-chain-monitor skill](https://sentinelhood.com/skills/robinhood-chain-monitor.md): drop-in Aeon skill that watches Robinhood Chain addresses for nonce, balance and bytecode changes. Reads only from the official RPC (rpc.mainnet.chain.robinhood.com), not from this API. Requires no keys. Robinhood Chain is not covered by Aeon's `onchain-monitor`.

## Limits
- Native ETH only; no token or USD indexing.
- Historical reads, not pre-sign simulation. No result is a safety guarantee.