iO GitHub stillmarcus24 stillos-swap MCP

This MCP server provides a non-custodial Solana token swapping integration using Jupiter. It describes a 0.25% fee model for swaps and includes a free scam-check on every token purchased. The server is identified by the slug io-github-stillmarcus24-stillos-swap-mcp and the repository-style name io.github.stillmarcus24/stillos-swap-mcp.

🛠️ Key Features

Non-custodial Solana swaps via Jupiter
0.25% fee
Free scam-check for every token you buy

🚀 Use Cases

Swapping tokens on Solana through Jupiter
Verifying tokens during purchase via scam-checking

⚡ Developer Benefits

Clear swap flow tied to Jupiter for Solana
Built-in scam-check behavior for token purchases

stillos-swap-mcp

Non-custodial Solana swap routing for agents. Best-price execution via Jupiter, a flat 0.25% router fee (cheaper than Trojan/Photon/GMGN at 0.5–1%), and a free on-chain scam-check on every token you buy.

You keep custody. The tool returns an unsigned transaction — you sign it with your own key and broadcast. StillOS never touches your funds.

MCP

json

{
  "mcpServers": {
    "stillos-swap": { "command": "npx", "args": ["-y", "stillos-swap-mcp", "mcp"] }
  }
}

Tools

build_solana_swap — { userPublicKey, inputMint, outputMint, amount } → { swapTransaction (base64, unsigned), expectedOut, route, routerFee, safety }. Sign and send the transaction yourself. When buying a non-stablecoin, safety carries an on-chain verdict (CLEAN / TRAP) based on live mint & freeze authority.

token_scam_check — { mint } → { verdict (CLEAN/RISK/UNKNOWN), mintAuthority, freezeAuthority, flags }. Established issuer tokens (USDC/USDT/SOL) are allowlisted. Read-only, no keys.

Why the scam-check matters

A live mint authority means the dev can print unlimited supply and dilute you to zero. A live freeze authority means the dev can freeze your tokens so you can never sell. Both are the most common rug vectors on pump.fun. This checks them before you buy — free.

SOLANA_RPC env var overrides the default public RPC for the safety check.

MIT · StillOS / NolaWealth

io.github.stillmarcus24/stillos-swap-mcp