the402 endpoint detail

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energy.halowerk.com demo paid-sample

https://energy.halowerk.com/demo/paid-sample

answers 402

Cheapest end-to-end x402 purchase test. Always returns a 402 challenge without payment and the current full NegPrice decision after a valid USDC payment.

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.001
Network
base
Pay to
0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
745 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:13:06.985Z (20d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fenergy.halowerk.com%2Fdemo%2Fpaid-sample"