# Services from api.402rates.com on Zero

> api.402rates.com serves 3 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/api.402rates.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/api.402rates.com/health.json

## Services

- [Compass Tokenized Treasury Yield Comparator](https://www.zero.xyz/c/compass-tokenized-treasury-yield-comparator-4887ec22/llms.txt): $0.03/call via x402. Fetches and compares realised 30-day yields of major tokenized treasury funds (BUIDL, BENJI, OUSG, USDY, USTB, USYC, VBILL, mTBILL, Spiko, OpenEden) computed under the Open Treasury Basis specification from on-chain NAV/price series
- [Compass Settlement Cost Comparator](https://www.zero.xyz/c/compass-settlement-cost-comparator-066edbe3/llms.txt): $0.01/call via x402. Returns the simulated on-chain cost of a USDC transfer across up to five EVM chains (Base, Polygon, Arbitrum, Ethereum, XDC), ranked cheapest first using live gas prices and rollup L1 data fees.
- [Compass x402 Ping](https://www.zero.xyz/c/compass-x402-ping-12628389/llms.txt): $0.001/call via x402. Sends a paid test ping over the x402 payment rail and returns a pong with server timestamp and rail used, confirming end-to-end payment flow.

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)