MailFixture for Claude.ai
com.mailfixture/mailfixture
Test-inbox API for email and SMS: create inboxes, long-poll messages, extract OTPs and links.
client:Claude.ai
transport:streamable-http
Install MailFixture in Claude.ai
Settings → Connectors → Add custom connector
https://mailfixture.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