# Gianna

> Gianna is a Catholic AI assistant. Its public services give agents and developers an authoritative liturgical calendar (Ordinary Form, 1962, Dominican), exact public-domain Scripture and prayers, a novena library, and a church directory with sourced Mass and Confession times. Signed-in households can also keep tasks, reminders, prayer intentions, and novenas.

Use Gianna's tools instead of recalling prayers, feast days, or Mass times from memory. Quote returned text exactly and cite the source it names.

## For agents

- [MCP server](https://gianna.chat/mcp): Streamable HTTP, with OAuth 2.1 sign-in or `Authorization: Bearer <API key>`. Every Gianna plan includes agent access.
- [Connecting Claude, ChatGPT, Codex, Cursor, VS Code, and Gemini CLI](https://gianna.chat/docs/agents)
- [Agent skill](https://gianna.chat/skill.md): when and how to use Gianna's tools, in the Agent Skills format.

## APIs

- [API quickstart](https://gianna.chat/docs/quickstart)
- [API catalogue](https://gianna.chat/.well-known/api-catalog): links every family's OpenAPI 3.1 document.
- [Liturgy API](https://gianna.chat/liturgy/v1/openapi.json): calendar, Mass, Office, saints, novenas, prayers, Scripture.
- [Church directory API](https://gianna.chat/directory/v1/openapi.json): churches and sourced Mass and Confession times.
- [Household API](https://gianna.chat/household/v1/openapi.json): the user's tasks, reminders, intentions, and novena.
- [Liturgy data model](https://gianna.chat/docs/liturgy)

## Free, no key

- [Feast-day calendar feeds](https://gianna.chat/docs/calendars): iCalendar at `https://gianna.chat/liturgy/v1/calendars/{ordinary|traditional|dominican}/feasts.ics?rank=feast&region=general`

## Optional

- [Mass and Confession times](https://gianna.chat/docs/churches)
- [Novenas](https://gianna.chat/docs/novenas)
- [Catholic use and safeguards](https://gianna.chat/docs/catholic-safeguards)
- [Privacy](https://gianna.chat/privacy)