the402 endpoint detail

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quicknode.com agent subscriptions

https://www.quicknode.com/api/v1/agent/subscriptions

answers 402

Create a Quicknode account and blockchain-infrastructure subscription paid with USDC via x402. Returns a Console API key (QN_*). Call without plan_name to list available plans and prices in the 402 body.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0
Network
base
Pay to
0x1CdffD2Ff63D2CCfF383050a87725ee79D210425
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
147 ms
Payment options
5 usable of 5
Last checked
2026-09-06T01:19:33.624Z (20d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fwww.quicknode.com%2Fapi%2Fv1%2Fagent%2Fsubscriptions"