the402 endpoint detail

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x402.donnyautomation.com optimism route

https://x402.donnyautomation.com/optimism/route

payable

Best execution price across DEXs on OP Mainnet - which DEX is cheapest to buy on and which pays most to sell into. Compares live prices across SushiSwap and Uniswap v3 fee tiers and returns the buy venue, the sell venue, the cross-exchange spread in bps, the fee-adjusted gross arbitrage spread and an optimal trade size. Smart order routing and cross-DEX arbitrage data for trading and execution age

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.003
Network
base
Pay to
0x2740651e046c59aB2A6510401140643292d3a96F
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
87 ms
Payment options
1 usable of 1
Last checked
2026-08-10T09:16:00.824Z (3d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fx402.donnyautomation.com%2Foptimism%2Froute"