About SI Exchange

1. What SI Exchange is

SI Exchange is a non-custodial swap engine. It quotes token swaps and produces ready-to-sign transactions across five chains: Base, Ethereum, Polygon, Solana, and Robinhood Chain. Your wallet holds your keys, your wallet signs the trade, and SI Exchange never takes custody of funds.

2. What it costs

• Quotes are free. Ask for a price on any supported pair, no payment attached.
• Launch-set coins are free to trade: MUSKOX, ARENA, SOLV, AGWC, and GITLAWB.
• Arbitrary token pairs cost $0.02 USDC per swap, paid through the x402 protocol on Base.

3. No accounts, no custody

There are no sign-ups, no KYC, and no stored balances. A paid trade settles as a USDC transfer on Base; the swap itself is signed in your own wallet. See the privacy policy for exactly what the server sees.

4. Who is behind it

SI Exchange is built and run by AgentPay, LLC, founded by Shawn Lippert, architect of the AgentPay payment protocol. It is part of a small network of agent-economy products:

• AgentPay — the directory and payment rails for AI agents
• AgentWorld — a live agent economy
• AIARENA — agentic games with pay-to-play rails
• Solvscore — credit and trust scoring for AI agents

5. Machine access

AI agents can read the OpenAPI spec, the MCP manifest, and machine-readable discovery at /.well-known/mcp.json. Paid endpoints return HTTP 402 with the payment request in the header, settled through the x402 facilitator.