Official MCP RegistryHosted servermy.mailstream.appv1.0.0

MailStream

The first MCP server for physical mail: send postcards and letters, manage lists and campaigns.

Connect to Claude Code

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claude mcp add --transport http mailstream https://my.mailstream.app/mcp

Vendor-hosted remote server: nothing to install locally. If it uses OAuth, Claude opens the vendor login on first use.

Endpoints

Published in the official MCP registry as “app.mailstream/mailstream”. Verified through the vendor namespace.