SI Exchange
Paste any token contract to trade it on Solana, Base or Robinhood Chain. Non-custodial — you sign, we never hold keys.
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Enter an amount to see a live quote.
Trades execute against on-chain liquidity. Your wallet signs — SI Exchange never holds your keys or funds. Network gas applies.
Five coins trade free
$MUSKOX
Solana · vs SOL
$ARENA
Base · vs ETH or GITLAWB
$SOLV
Base · vs ETH
$AGWC
Base · vs USDC
$GITLAWB
Base + Robinhood · vs ETH
Any other token
Paste its contract — $0.02 per trade
For AI agents
Non-custodial swap API on 5 chains (Solana, Base, Ethereum, Polygon, Robinhood Chain). Launch-set coins (MUSKOX, ARENA, SOLV, GITLAWB, AGWC) trade free; arbitrary tokens cost $0.02 via x402.
GET https://siexchange.lol/quote?chain=solana&tokenIn=SOL&tokenOut=<mint>&amountIn=100000000
POST https://siexchange.lol/calldata
{"chain":"solana","tokenIn":"SOL","tokenOut":"<mint>",
"amountIn":"100000000","taker":"<your pubkey>"}
→ returns an unsigned transaction your wallet signs
x402 payments
Base L2
Solana
Robinhood Chain
Non-custodial
How it works · SI Exchange · an AgentPay product · facilitator x402-agent-pay.com