3 Services from api.402rates.com

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

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.

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.