How to Install send21 in Claude Desktop

Agents create payment drafts. Humans sign in their own wallet. Direct. Non-custodial. Yours.

What send21 does

send21 is a non-custodial MCP for crypto payments aimed at AI agents and humans. Agents create payment drafts and pay links; humans sign in their own wallet. Direct. Non-custodial. Yours. Prepares payment drafts and pay links; never holds keys. Supports BTC, USDC, USDT, and EURC across Bitcoin, Solana, Ethereum, and Base (assets per chain as supported — never USDT or BTC on Base). Remote MCP endpoint at https://send21.io/mcp.

mcp

payments

crypto

bitcoin

non-custodial

Installation steps

1Copy the config below
2Open claude_desktop_config.json
3Paste inside "mcpServers": {}
4Restart Claude Desktop

Configuration

File location: ~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.jsonjson

{
  "send21": {
    "command": "npx",
    "args": [
      "-y",
      "@send21io/mcp"
    ]
  }
}

Full server details GitHub Open Config Editor

Install in other clients

💻Claude Code ⌨️Cursor 🏄Windsurf ✨OpenAI ♊Gemini

For maintainers

If you maintain send21, add this badge to your README to show it's verified on CuratedMCP:

[![CuratedMCP Verified](https://www.curatedmcp.com/api/badge/send21)](https://www.curatedmcp.com/marketplace/send21)

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