Crypto pay links and API for people and AI agents. BTC, Lightning, USDC, USDT, EURC, SOL, ETH.
Streamable HTTP
https://send21.io/mcpclaude mcp add --transport http send21io https://send21.io/mcpStreamable HTTP
https://send21.io/mcp/oauthclaude mcp add --transport http send21io https://send21.io/mcp/oauthThis server publishes no installable package.