api.402rates.com settlement costs

https://api.402rates.com/v1/settlement/costs

payable

Compare the measured on-chain cost of a USDC transfer across Base, Polygon, Arbitrum, Ethereum, and XDC, using gas units simulated per chain, live gas prices, fresh chain heads and the rollup L1 data fee, sorted cheapest first.

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.

Price: $0.01
Network: base
Pay to: 0xf567Cfe0FDb87A1D6Ca330e3f30f0D3DA0F7cb98
Spec dialect: v2 (declares x402Version 2)
Transport: PAYMENT-REQUIRED header
HTTP method: GET
Response latency: 131 ms
Payment options: 3 usable of 3
Last checked: 2026-08-10T09:10:39.092Z (1d ago)
Category: finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.402rates.com%2Fv1%2Fsettlement%2Fcosts"