Temporal Cortex MCP

Temporal Cortex is a Model Context Protocol server that gives AI agents deterministic calendar capabilities — temporal context, datetime resolution…

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What it can do

  • Get Temporal Context: Get the current temporal context — time, timezone, calendar metadata. Call this first to orient yourself in time before making calendar queries.
  • Resolve Datetime: Resolve a human-readable time expression to an absolute datetime. Supports: 'next Tuesday at 2pm', 'tomorrow morning', '+3h', 'in 2 hours', 'start of next week', RFC 3339 passthrough
  • Convert Timezone: Convert a datetime to a different timezone.

What data it sees

Do you need an account

No: the server works without sign-in

Temporal Cortex is a Model Context Protocol server that gives AI agents deterministic calendar capabilities — temporal context, datetime resolution, multi-calendar availability merging across Google Calendar, Microsoft Outlook, and CalDAV, and conflict-free booking with Two-Phase Commit. Powered by Truth Engine. Install: npx @temporal-cortex/cortex-mcp.

How to connect

How to connect Temporal Cortex MCP to Claude

The server address to paste into Claude settings:

https://cortex-mcp--temporal-cortex.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect Temporal Cortex MCP to ChatGPT

The server address to paste into ChatGPT settings:

https://cortex-mcp--temporal-cortex.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect Temporal Cortex MCP to Cursor

The server address to paste into Cursor settings:

https://cortex-mcp--temporal-cortex.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (12)

Raw names from tools/list. Only developers need these.

get_temporal_contextGet the current temporal context — time, timezone, calendar metadata. Call this first to orient yourself in time before making calendar queries.
resolve_datetimeResolve a human-readable time expression to an absolute datetime. Supports: 'next Tuesday at 2pm', 'tomorrow morning', '+3h', 'in 2 hours', 'start of next week', RFC 3339 passthrough, and more.
convert_timezoneConvert a datetime to a different timezone.
compute_durationCompute the duration between two timestamps. Returns days, hours, minutes, seconds, and a human-readable string.
adjust_timestampAdjust a timestamp by adding or subtracting a duration. DST-aware: '+1d' preserves wall-clock time across daylight saving transitions.
list_calendarsList all connected calendars across providers. Returns calendar IDs, names, labels, and metadata.
list_eventsList calendar events in a time range. Returns events in TOON or JSON format.
find_free_slotsFind available free time slots in a calendar within a time window.
expand_rruleExpand a recurrence rule (RRULE) into concrete event instances.
check_availabilityCheck if a calendar time slot is available (not held by another booking).
get_availabilityGet unified availability across multiple calendars. Merges events from all specified calendars into a single busy/free view with privacy controls.
book_slotBook a calendar slot using Two-Phase Commit for safe, conflict-free booking.