How to Install send21 in OpenAI Agents SDK

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

1Install: pip install openai-agents
2Copy the snippet below into your agent code
3Replace placeholder env values with your real keys
4Pass mcp_servers=[mcp_server] to your Agent()

Python snippet

Python snippetpython

from agents import Agent
from agents.mcp import MCPServerStdio

mcp_server = MCPServerStdio(
    command="npx",
    args=["-y", "@send21io/mcp"],
)

agent = Agent(
    name="My Agent",
    model="gpt-4o",
    mcp_servers=[mcp_server],
)

Full server details GitHub Open Config Editor

Install in other clients

🤖Claude Desktop 💻Claude Code ⌨️Cursor 🏄Windsurf ♊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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