send21.io
LiveMCP Serversend21: Crypto pay links and API for people and AI agents. BTC, Lightning, USDC, USDT, EURC, SOL, ETH. (text from the Official MCP Registry)
8/8Connection Checks That Worked, All 2 Servers (With Or Without A Login)
203 msTypical Response Time
14Most Tools On One Server
2025-06-18Protocol Version
3 h agoLast Checked, Any Server (2026-10-27T13:27:50Z)
NoLogin Required
Servers On This Host
| Address | Name | Status | Recent Checks OK | Response Time | Tools | Last Checked |
|---|---|---|---|---|---|---|
| https://send21.io/mcp | send21 | Live | – | 203 ms | 14 | 3 h ago · receipt |
| https://send21.io/mcp/oauth | send21 | Live, Needs Login | – | 177 ms | n/a | 5 h ago · receipt |
How we check: we connect without logging in and ask for the list of tools. We never send credentials and never pay. Tools that don't state a price are never called; for tools that do, we send at most 2 unpaid calls to read the payment request. We make test purchases only from HTTP x402 services, never from MCP tools. Signed records: raw data page · free quick check (JSON)