"Proton Calendar" matching MCP connectors:

News, web search, mail, markets, weather, places, files, calendar, contacts. 67 tools, one endpoint.

Vietnamese Lunar Calendar for date and calendar conversion, and cultural insights.

SEO automation MCP with 39 tools. 12 free tools (no auth): audit pages, check Core Web Vitals, validate schema, score AI visibility, generate keywords. 27 pro tools with account: manage content calendar, track GSC traffic, monitor AI bot visits (ChatGPT/Perplexity), analyze backlinks, and publish directly to WordPress, Webflow, or Wix.