send21 for Windsurf

io.github.send21io/mcp

Non-custodial payment drafts/pay links for BTC, USDC, USDT, EURC. Never holds keys.

client:Windsurf transport:streamable-http tools:9

Install send21 in Windsurf

~/.codeium/windsurf/mcp_config.json · windows: %USERPROFILE%\.codeium\windsurf\mcp_config.json

{
  "mcpServers": {
    "mcp": {
      "serverUrl": "https://send21.io/mcp"
    }
  }
}

Global only — Windsurf has no per-project MCP config. Refresh Cascade after saving. Windsurf docs