⌬
agentic.liquidity
x402 quote api · v1
/.well-known/agent.json
// agentic liquidity

A pay-per-quote DEX router
built for autonomous agents.

One HTTP endpoint. Best-execution across 0x liquidity sources on Ethereum and Base. Locked behind HTTP 402 — agents pay a 0.05 USDC toll per unlock, no API keys, no accounts.

unlocks · 24h
8,214
paid quote requests
live tolls
0
rolling window
unlock fee
0.05
USDC · base/eth
chains
2
ethereum · base
gas · ethereum
—gwei
block #—
gas · base
—gwei
block #—
try it · curl
HTTP 402 · X402
curl "/api/v1/quote?sellToken=WETH&buyToken=USDC&sellAmount=1000000000000000000&chainId=8453"
# → 402 Payment Required (preview JSON + payment instructions)

curl -H "X-Payment-Receipt: 0x<txhash>" \
  "/api/v1/quote?sellToken=WETH&buyToken=USDC&sellAmount=1000000000000000000&chainId=8453"
# → 200 OK (full 0x route, gas, sources)
top liquidity routes · 0x
Best-execution by pair
refresh · 12s
live toll feed · x402
Recent micro-payments
x402 protocol

Pay-per-call, not per-month.

Every quote request without a valid X-Payment-Receipt header returns HTTP 402 with a preview body and on-chain payment instructions. Resend with the receipt to unlock the full quote.

0.05 USDC / unlockBase · EthereumNo accountsAgent-discoverable
// 402 response · preview body
{
  "estimated_savings_usd": "12.40",
  "status": "Locked",
  "unlock_fee": "0.05 USDC",
  "payment": {
    "scheme": "x402",
    "payTo": "0x…",
    "asset": "USDC",
    "networks": ["base", "ethereum"]
  }
}