Fastmail just shipped an MCP server at api.fastmail.com/mcp, and it's the kind of move the AI agent space needs more of. Instead of bolting a chatbot onto your inbox, Fastmail built an API endpoint that lets you connect your own AI client to your email, calendar, and contacts. You authenticate via OAuth and pick from three access levels: read-only, write, or send. Done.
Founder and CTO Rob Mueller is clear: Fastmail hasn't integrated AI into its platform. The MCP server is just another protocol endpoint, sitting alongside IMAP, CalDAV, and CardDAV, except designed for AI models. Users who don't care about AI notice nothing different.
Mueller frames this as two competing philosophies. The first, favored by Microsoft and Google, embeds AI directly into each app. Outlook gets Copilot, Gmail gets Smart Compose, and neither knows anything about the other. Each app gets its own AI. All scattered, all siloed. The second approach, enabled by MCP, lets you pick your AI. That AI becomes a persistent interface reaching across every connected service, pulling context together. Given that Google is simultaneously the biggest webapp provider, an AI provider, and the world's largest advertiser, their lack of Gemini MCP support isn't exactly surprising.
The MCP standard is driven by Anthropic with OpenAI on board. Fastmail's bet is that open protocols beat walled gardens. For anyone building or tracking AI agents, this is a signal the infrastructure for cross-service orchestration is getting serious.