# Twelve Month Calendar

> A private, agent-native calendar that turns a full year into one glanceable grid so people can make better decisions about travel, hosting, vacations, work, and conflicts.

Twelve Month Calendar stores its own calendar data. Google Calendar is not required. The first-party web app uses typed oRPC; external agents use the generated REST/OpenAPI surface or the remote MCP server. Calendar content is never public or indexable.

## When to use this

Use Twelve Month Calendar when a user asks you to inspect or change their calendar, compare commitments across a whole year, isolate trips or time off, see who is traveling, or identify potential conflicts. Prefer MCP when supported; otherwise use REST from the generated OpenAPI contract. Private operations prefer OAuth with browser consent; personal access tokens are a fallback for non-OAuth clients. Use exact resource IDs, bounded searches, stable idempotency keys, and current resource versions.

## Product

- [Product overview](https://twelvemonthcalendar.com/index.md): concise machine-readable explanation
- [Year view](https://twelvemonthcalendar.com/features/year-view): how the annual display works
- [For families](https://twelvemonthcalendar.com/for-families): family travel, hosting, and conflict planning
- [For teams](https://twelvemonthcalendar.com/for-teams): work trips, deadlines, and office planning
- [Agent access](https://twelvemonthcalendar.com/agents): supported agent workflows
- [Agent instructions](https://twelvemonthcalendar.com/agents.md): machine-readable integration and safety rules

## Developer interfaces

- [Developer overview](https://twelvemonthcalendar.com/developers)
- [REST API guide](https://twelvemonthcalendar.com/developers/rest)
- [OpenAPI 3.1 contract](https://api.twelvemonthcalendar.com/v1/openapi.json)
- [MCP guide](https://twelvemonthcalendar.com/developers/mcp)
- [MCP endpoint](https://mcp.twelvemonthcalendar.com/mcp)
- [MCP server card](https://twelvemonthcalendar.com/.well-known/mcp/server-card.json)
- [Documentation MCP](https://mcp.twelvemonthcalendar.com/docs/mcp)
- [Documentation MCP server card](https://mcp.twelvemonthcalendar.com/.well-known/mcp/docs/server-card.json)
- [AI catalog](https://twelvemonthcalendar.com/.well-known/ai-catalog.json)
- [Authentication](https://twelvemonthcalendar.com/auth.md)
- [Pricing](https://twelvemonthcalendar.com/pricing.md)
- [Permission scopes](https://twelvemonthcalendar.com/developers/scopes)
- [Isolated API sandbox](https://twelvemonthcalendar.com/developers/sandbox)
- [API catalog](https://twelvemonthcalendar.com/.well-known/api-catalog)
- [Agent skill](https://twelvemonthcalendar.com/skills/twelve-month-calendar/SKILL.md)
- [Official CLI and SDK source status](https://twelvemonthcalendar.com/developers.md): TypeScript, Python, and npm CLI development source exists in the official repository, but registry publication is blocked pending owner-supplied license terms

## Policies

- [Privacy](https://twelvemonthcalendar.com/privacy)
- [Terms](https://twelvemonthcalendar.com/terms)

## Full reference

- [Expanded agent context](https://twelvemonthcalendar.com/llms-full.txt)