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api.eucompliance.tools x402 preflight
https://api.eucompliance.tools/x402/preflight
payable
Will this transaction go through? Six checks before any gas is spent: gas vs balance, full simulation with the revert reason decoded, stuck nonces, contract or wallet recipient, ERC-20 allowance, and a sanctions screen of the counterparty. Returns send / do not send with every reason.
We sent a real
GET request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.005
- Network
- base
- Pay to
- 0x478bCdeA94b9CB5EA14C33e6f0d7E920743d39f2
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- GET
- Response latency
- 1208 ms
- Payment options
- 4 usable of 4
- Last checked
- 2026-08-10T09:13:52.993Z (1d ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.eucompliance.tools%2Fx402%2Fpreflight"