the402 endpoint detail

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open-pay.jp jpyc supply

https://open-pay.jp/api/paid/usdc/jpyc/supply

answers 402

Read the current contract-reported JPYC totalSupply on Polygon, Kaia, Avalanche or Ethereum, with the token contract address and the block number observed at request time. Use for periodic supply monitoring, cross-chain comparison, or verifying a current JPYC supply figure before citing it. Not for market price, reserve backing, circulating-supply analysis, or financial advice.

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.002
Network
base
Pay to
0x52d4901142e2B5680027da5EB47C86CB02a3cA81
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
238 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:13:18.702Z (21d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fopen-pay.jp%2Fapi%2Fpaid%2Fusdc%2Fjpyc%2Fsupply"