send21 for Claude.ai

io.github.send21io/mcp

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

client:Claude.ai transport:streamable-http tools:9

Install send21 in Claude.ai

Settings → Connectors → Add custom connector

https://send21.io/mcp

Claude on the web takes a remote URL and completes OAuth in the browser. For a packaged server use Claude Desktop or Claude Code instead. Claude.ai docs

What Claude.ai can do once it is connected

get_transaction_template
get_fee_schedule
create_payment_request
list_address_book
get_draft
get_payment_request
get_rate
create_draft
get_draft_status

send21 in other clients

Claude Code
Claude Desktop
Cursor
VS Code
Zed
Windsurf
Cline
Gemini CLI
Grok
ChatGPT
LangChain

send21 MCP server