the402 endpoint detail

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x402.donnyautomation.com base scan

https://x402.donnyautomation.com/base/scan

payable

Live cross-DEX arbitrage scanner for Base. Scans every liquid pair across BaseSwap, SushiSwap and Uniswap v3 and returns ranked cross-venue spreads: where to buy, where to sell, spread in bps, optimal trade size and gross USD at that size. GROSS, before gas and MEV. Venues below a liquidity floor are excluded, so a spread against a dust pool is never reported as an opportunity. For arbitrage bots

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
84 ms
Payment options
1 usable of 1
Last checked
2026-08-10T09:16:00.382Z (3d ago)
Category
finance-crypto

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