Teamup Calendar MCP
Read, search, create and manage events on Teamup Calendar with full control over recurring events and sub-calendars.
Connect to Teamup Calendar to view events, search by keyword, create and update events with recurrence rules, manage sub-calendars, and handle signups. Supports undo for recent changes within one hour.
Try asking Muse: "Add a weekly team meeting to the office calendar for the next 10 weeks."
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Source: Found in the official MCP Registry (io.usefulapi/teamup-calendar) · First listed October 29, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 42 min ago.
Is it safe to connect?
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
musedirectory.ai is not part of Meta. More about how Muse handles your information
How to add it to Muse
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://teamup-calendar.usefulapi.io/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Also use it in ChatGPT or Claude
Teamup Calendar MCP is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
Add it to ChatGPT
- 1
Open ChatGPT settings
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
- 2
Turn on developer mode
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
- 3
Create the connector
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
- 4
Use it in a chat
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
Add it to Claude
- 1
Open Claude settings
In Claude, open Settings, then Connectors.
- 2
Add a custom connector
Choose Add custom connector, give it a name, and paste the link.
- 3
Connect and use it
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://teamup-calendar.usefulapi.io/mcpWhat people ask Muse to do
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 295ms. Worked in 100% of checks over 30 days.
Screening · October 29, 2026
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
Tools · 15
teamup_get_calendarThe calendar this connection points at: title, timezone and date settings, custom event fields, sub-calendars, the permission of the calendar key in use and the plan's features. Call this first to learn the sub-calendar ids and the timezone. The calendar key itself is never returteamup_list_subcalendarsList the sub-calendars (the colored lanes that events belong to, such as people, rooms or resources). A key with admin permission also sees inactive ones. GET /{calendarKey}/subcalendars.teamup_get_subcalendarOne sub-calendar by id: name, color, overlap rule, active state and which links may use it. GET /{calendarKey}/subcalendars/{id}.teamup_list_access_keysList the calendar's access keys (sharing links and user accesses) with name, role, active state and per-sub-calendar permission. Needs a key with admin permission. The secret key values are never returned (they are secrets); use the id and name to tell links apart. GET /{calendarteamup_list_eventsList the events in a date range, optionally only on some sub-calendars. Recurring events are expanded: every occurrence in the range is returned with its own id (series id + -rid- + start). Notes come as markdown. Times use the calendar's timezone unless tz is set. GET /{calendarteamup_search_eventsSearch events by keyword (2-100 characters) within a date range (default: today only, so always pass the range you mean). Recurring events are expanded. Paged with limit and offset. GET /{calendarKey}/events?query=.teamup_get_eventOne event by id: title, times, sub-calendars, location, who, notes (markdown), recurrence rule, custom fields, signups, comments, attachments (metadata), version, change history and reminders. Use the occurrence id (123-rid-<unix start>) for one occurrence of a recurring event. Gteamup_list_changed_eventsEvents created, changed or deleted since a Unix timestamp (at most 30 days back), for syncing. A recurring event comes back once, as its series, not as occurrences. Deleted events carry delete_dt. Pass the reply's timestamp as since_timestamp next time so nothing is missed. GET /teamup_list_event_signupsThe people signed up for an event (name, email, id). Signups must be enabled on the event. GET /{calendarKey}/events/{id}/signups.teamup_create_eventWRITE: create an event. Needs a calendar key with add or modify permission. Give at least subcalendar_ids, start and end. Not idempotent: a repeated call creates a second event. The reply holds the new event and an undo_id; teamup_undo_event_action removes the event again within teamup_update_eventWRITE: change fields of an event; fields you leave out keep their value (the event is read first and sent back with its version, so a concurrent edit is refused instead of overwritten; an event without a version is not changed). Needs modify permission. For a recurring event passteamup_delete_eventWRITE, DESTRUCTIVE: delete an event, or for a recurring event the chosen occurrences. Needs modify permission. Not retried. The reply holds an undo_id; teamup_undo_event_action restores the event within one hour, after that the deletion is permanent. For one occurrence use the octeamup_undo_event_actionWRITE: undo a recent event creation, update or deletion with the undo_id from that call. Works for one hour only and is refused if someone else changed the event since. PUT /{calendarKey}/events/undo/{undo_id}.teamup_create_subcalendarWRITE: create a sub-calendar. Needs a calendar key with admin permission, and the plan may limit how many exist. Not idempotent: a repeated call creates a second one. POST /{calendarKey}/subcalendars.teamup_update_subcalendarWRITE: change a sub-calendar's name, color, overlap rule or active state; fields you leave out keep their value. Needs admin permission. Making a sub-calendar inactive hides it from users without admin rights. PATCH /{calendarKey}/subcalendars/{id}.Recent checks
Link
https://teamup-calendar.usefulapi.io/mcpQuestions about Teamup Calendar MCP in Muse
How do I connect Teamup Calendar MCP to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Teamup Calendar MCP to help me. It is a free service with an MCP server at https://teamup-calendar.usefulapi.io/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
Is Teamup Calendar MCP working right now?
At the last check (October 29, 2026, 11:15 UTC) the endpoint was working, answering in 295ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
Is Teamup Calendar MCP safe to connect to Muse?
It was screened on October 29, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
What can Teamup Calendar MCP do in Muse?
It exposes 15 tools, including teamup_get_calendar, teamup_list_subcalendars, teamup_get_subcalendar, teamup_list_access_keys. For example, you could ask Muse: "Add a weekly team meeting to the office calendar for the next 10 weeks."
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