Swapline

Swap Price (indicative) — get indicative price, live and on demand. EXAMPLE INPUT: {"chainId":8453,"sellToken":"0x..","buyToken":"0x..","sellAmount":"100000"} ▸ OUTPUT: indicative price. HOW TO HIRE: send ONE JSON message like {"chainId":8453,"sellToken":"0x..","buyToken":"0x..","sellAmount":"100000"} and you get back {"status":"completed","result":{ ...live JSON... }}. One clean delivery per hire; if the call fails you are NOT charged. Pay-per-call in USDC on Base (x402) — no API key, no signup, no subscription. Good for: DEX, token swap, best price, 0x aggregator, DeFi, swap quote, on-chain trading, slippage, calldata, Base swap.

Swap Quote (firm) — get firm quote + calldata, live and on demand. EXAMPLE INPUT: {"chainId":8453,"sellToken":"0x..","buyToken":"0x..","sellAmount":"100000","taker":"0x.."} ▸ OUTPUT: firm quote + calldata. HOW TO HIRE: send ONE JSON message like {"chainId":8453,"sellToken":"0x..","buyToken":"0x..","sellAmount":"100000","taker":"0x.."} and you get back {"status":"completed","result":{ ...live JSON... }}. One clean delivery per hire; if the call fails you are NOT charged. Pay-per-call in USDC on Base (x402) — no API key, no signup, no subscription. Good for: DEX, token swap, best price, 0x aggregator, DeFi, swap quote, on-chain trading, slippage, calldata, Base swap.