the402 endpoint detail

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402.com.tr x402 b20-authenticity

https://402.com.tr/api/x402/b20-authenticity

payable

🆕 Run FIRST on any 'B20'. A scammer can deploy a normal contract at a vanity 0xB200… address and fake the whole B20 read surface — the B20Factory precompile is the one authority that can't be spoofed. Verifies factory registration + bytecode absence (real B20s are chain-native precompiles with no code). verdict: genuine / fake_lookalike / not_b20. The 2-cent check that keeps every other B20 answer

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.02
Network
base
Pay to
0x973a31858f4d2125f48c880542da11a2796f12d6
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
355 ms
Payment options
1 usable of 1
Last checked
2026-08-10T09:16:50.603Z (1d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2F402.com.tr%2Fapi%2Fx402%2Fb20-authenticity"