the402 endpoint detail

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defi.halowerk.com dex quote

https://defi.halowerk.com/dex/quote

payable

For a given chain, token pair and input amount, every connected DEX is queried through its own contracts: Uniswap V3 through the Quoter via eth_call across all fee tiers, constant-product pools through the pool maths on live reserves, Solidly-style pools through their own getAmountOut. Two-hop routes through the wrapped native token and the chain USDC are included, priced by chaining the hops exac

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.005
Network
base
Pay to
0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
605 ms
Payment options
1 usable of 1
Last checked
2026-08-10T09:17:20.618Z (4d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fdefi.halowerk.com%2Fdex%2Fquote"