AI Assistant
Orthocal.info provides a server implementing the Model Context Protocol (MCP), an open standard that lets AI assistants call an application's tools directly instead of guessing at what's on the page. Connect an MCP-aware assistant (Claude, or any other MCP client) to Orthocal, and you can just ask it things like “what are today's Orthodox readings?” or “when is St Seraphim of Sarov commemorated?” and it will look up the real data rather than making something up.
The server is new and still growing; today it exposes two tools:
- Look up a day. Feasts, fasting rules, scripture readings, and the lives of the saints for any date, in either the Slavic (OCA/ROCOR) or Greek (Antiochian/GOA) tradition, on the Gregorian or Julian calendar, with the readings in the modern LXX2012+WEB pairing by default, or the King James Version on request.
- Search for a saint. Find which day(s) a saint is commemorated on by name.
Connecting
The server speaks MCP over Streamable HTTP at https://orthocal.info/mcp. No account or API key is needed — Orthocal's data is fully public.
Claude Desktop
Open Claude Desktop, go to Settings → Connectors, click Add custom connector, and paste in the URL above. No further configuration is needed.
ChatGPT
In ChatGPT on the web, go to Settings → Apps → Advanced settings and turn on Developer mode (requires a Plus, Pro, Business, Enterprise, or Edu plan). Then go to Settings → Connectors, click Create, and enter the URL above.
Claude Code
claude mcp add --transport http orthocal https://orthocal.info/mcpOther MCP-compatible clients generally have a similar way to add a remote server by URL — consult your client's documentation for the exact steps.