SendRegistered for Claude.ai
com.sendregistered/mcp
Send registered letters with proof, nationally and internationally, from your AI assistant.
client:Claude.ai
transport:streamable-http
Install SendRegistered in Claude.ai
Settings → Connectors → Add custom connector
https://sendregistered.com/mcpClaude 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