GET /base/quote $0.005/call
Best-execution swap quotes on Base: every Uniswap V3 fee tier plus Aerodrome volatile and stable pools, with automatic WETH multi-hop routing. Returns the best route, per-venue breakdown, and effective price both directions. $0.005 per call — the price-check primitive for trading agents.
Parameters
| name | required | description |
|---|---|---|
tokenIn | yes | token address or ETH/WETH |
tokenOut | yes | token address or ETH/WETH |
amount | yes | human-units amount of tokenIn |
Example
GET /base/quote?tokenIn=ETH&tokenOut=0x8335…&amount=1
→ {"best":{"venue":"uniswap-v3","detail":"fee 0.01%","amountOutFormatted":"1873.87"},"price":{"USDC_per_WETH":1873.87},"block":"…"}
Payment (x402)
Call without payment to receive HTTP 402 with a base64 envelope in the payment-required header — price, payTo, network (USDC on Base), and I/O schemas. Pay automatically with @x402/fetch:
const payFetch = wrapFetchWithPayment(fetch, client);
const res = await payFetch("https://402arcade.dev/base/quote?…");
No API keys. No accounts. Machine-readable: openapi.json · llms.txt · catalog