the402 endpoint detail

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gateway.apiosk.com attestations oracle-reading

https://gateway.apiosk.com/attestations/oracle-reading

answers 402

Call a Chainlink aggregator latestRoundData directly on Base and return the round with a signed JWS-HS256 receipt. Pass a known pair (ETH/USD, BTC/USD, USDC/USD, DAI/USD, LINK/USD) or an explicit aggregator address; the number is itself on-chain and re-checkable from the feed address + block in the envelope.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.03
Network
base
Pay to
0xA039E3dEb5ca71E41905f90491FC5d016CE23B79
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
617 ms
Payment options
1 usable of 1
Last checked
2026-08-15T14:35:43.689Z (3d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fgateway.apiosk.com%2Fattestations%2Foracle-reading"