What is a calendar aggregator for AI agents?

A single service that connects to all your calendar accounts and exposes them to AI agents through one interface. Synced does this over MCP: agents see one merged calendar instead of one connector per account or provider.

Which AI agents can use Synced?

Any client that supports remote MCP servers, including Claude, Claude Code, ChatGPT custom connectors, and agents you build with an MCP SDK. Proactive agents like Claude Duet use the connectors on your Claude account; Meta Muse can use it where custom connectors are available.

Can my agent see Outlook if it only supports Google?

Yes. Synced connects to Microsoft for you, so the agent reads Outlook and Microsoft 365 calendars through Synced alongside Google.

Can an agent manage my to-do list?

Yes. Through the task tools an agent can capture tasks from plain language, change them, plan them into free time before they're due, and mark them done. You see the same list in Synced.

Do I have to reconnect my calendars for each new assistant?

No. Calendars connect to Synced once. Each new assistant only needs the Synced connector and its own API key.

Features · Calendar for AI agents

Connect your calendars once, for every agent

Every AI assistant asks you to connect your calendar again, and most only speak Google. Synced is the aggregator in between: connect each Google and Microsoft account to Synced once, and any agent that speaks MCP gets all of them, merged, plus a task list it can add to, plan and close.

Try it free All features

Your agent · Synced connector

Keep track of the follow-ups from today's calls and find time for them.

create_task{"title":"Send Acme the revised SOW","duration_minutes":30,"due_date":"2026-11-11","project":"Acme"}

created · todo · no time on the calendar yet

create_task{"title":"Draft Globex QBR deck","duration_minutes":120,"due_date":"2026-11-13","project":"Globex"}

created · todo

Two follow-ups are on your task list. Want me to find time for both?

The SOW is already sent. Just the deck.

complete_task{"task_id":"…"}

Send Acme the revised SOW · done

plan_tasks{"task_ids":["…"],"from":"2026-11-10","to":"2026-11-13"}

committed: false · plan_id: eyJ2Ijox… Draft Globex QBR deck → Wed 11 Nov, 9:00 – 11:00 AM

Marked the SOW done. Wednesday 9–11 is free on all three calendars for the QBR deck. Book it?

Yes

plan_tasks{"commit":true,"plan_id":"eyJ2Ijox…"}

Draft Globex QBR deck · scheduled · Added to 3 calendars

Booked. You'll see both on your task list in Synced: one done, one with its time.

An agent managing a task list through Synced · sample data

Claude Duet · Synced connector

Each morning, tell me what needs attention on my calendars.

list_events{"start_date":"2026-11-10","end_date":"2026-11-10"}

09:00 Northwind standup (maria@northwind.io · Google) 10:00 Pricing sync (northwind.io + globex.com · one event, not answered on globex.com) 13:00 Busy (gmail.com) 15:00 Globex steering committee (maria.ortiz@globex.com · Outlook)

Four things today across Google and Outlook. You haven't answered the pricing sync on your Globex account. Accept it?

Yes

respond_to_event{"event_id":"…","start":"2026-11-10T10:00","response":"accepted","calendar_account":"maria.ortiz@globex.com"}

accepted on maria.ortiz@globex.com

Accepted on your Globex calendar.

A proactive agent reading Google and Outlook · sample data

An aggregator, not another silo

Google, Outlook and Microsoft 365 accounts, plus iCal feeds, behind one MCP server. A meeting on two accounts comes back once.

Fills the gaps in agent connectors

Assistants whose own connectors don't cover Outlook, or only one account, get every calendar through Synced.

A to-do list agents can manage

Agents create tasks, update them, plan them into free time before their due dates and mark them done, on the same list you see in Synced.

Time that's actually protected

Planned tasks become private busy blocks on every calendar, so the agent's plan holds.

Agents that ask first

Each tool says whether it reads, writes, deletes or reaches other people; clashing bookings are refused until you confirm; plans are previewed before they're written.

One key per agent

Give each agent its own scoped API key and revoke it in Synced without touching your calendar accounts.

How it works

Step 1
Connect your accounts to Synced
Sign in with Google or Microsoft and add every other account you use.
Step 2
Give each agent a key
Create an API key per assistant in Settings → Integrations.
Step 3
Add one connector
Paste the Synced MCP URL into Claude, Claude Duet, ChatGPT, Muse or your own agent.

Questions

What is a calendar aggregator for AI agents?: A single service that connects to all your calendar accounts and exposes them to AI agents through one interface. Synced does this over MCP: agents see one merged calendar instead of one connector per account or provider.
Which AI agents can use Synced?: Any client that supports remote MCP servers, including Claude, Claude Code, ChatGPT custom connectors, and agents you build with an MCP SDK. Proactive agents like Claude Duet use the connectors on your Claude account; Meta Muse can use it where custom connectors are available.
Can my agent see Outlook if it only supports Google?: Yes. Synced connects to Microsoft for you, so the agent reads Outlook and Microsoft 365 calendars through Synced alongside Google.
Can an agent manage my to-do list?: Yes. Through the task tools an agent can capture tasks from plain language, change them, plan them into free time before they're due, and mark them done. You see the same list in Synced.
Do I have to reconnect my calendars for each new assistant?: No. Calendars connect to Synced once. Each new assistant only needs the Synced connector and its own API key.

Free for individuals

Connect your calendars in a minute. No credit card.

Get started free