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send21

MCP server · by send21io

Developer Tools Streamable HTTP v1.0.0

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

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Install

Run one of the commands below, then add the client config underneath.

Streamable HTTPhttps://send21.io/mcp

Client configuration

Paste into Claude Desktop, Cursor (mcp.json), VS Code or any MCP client, then restart the client.

mcpServers{
  "mcpServers": {
    "mcp-1434": {
      "url": "https://send21.io/mcp"
    }
  }
}

About this server

send21 is listed in the Developer Tools category of the MCPNav directory. It is distributed as Streamable HTTP and can be loaded by any client that speaks the Model Context Protocol.

Typical uses include giving your assistant scoped access to the corresponding service so it can answer questions and take actions with real data instead of guessing. Always review what a server can access before you enable it — see our MCP security guide.

Frequently asked questions

What is the send21 MCP server?

send21 is an MCP server by send21io. Non-custodial payment drafts/pay links for BTC, USDC, USDT, EURC. Never holds keys.

How do I install send21?

Install it with: https://send21.io/mcp. Then add the JSON config to your client's MCP settings and restart the client.

Is send21 free to use?

The MCP server itself is free to install. The source is public on https://github.com/send21io/mcp. Any third-party API it calls (such as a search or maps API) may require its own key and billing.

Which clients support send21?

Any MCP-compatible client can use it, including Claude Desktop, Cursor, VS Code, Windsurf and custom agents.