The Sync Day MCP server,
connected in one click.
Free no-signup group scheduling; share a link and rank times by who's free. Connect the official Sync Day MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add Sync Day to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http sync-day https://sync.day/mcp/mcpRun in your terminal, then restart Claude Code.
Sync Day · https://sync.day/mcp/mcp
What your AI can do with Sync Day
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “create_event”: Create a sync.day availability poll and get its share link. Candidate days run from startDate to endDate (inclusive; or give days instead).”
“Use “parse_event_text”: Turn a natural-language sentence (Chinese works best) into create_event input using sync.day's AI parser. Does NOT create anything; review t.”
“Use “get_event”: Read an event: settings, every candidate start key per day (startOptions), who has answered (participants with their start keys; names may r.”
“Use “submit_availability”: Save (or replace) one person's availability: the candidate start keys they can make, from get_event.startOptions. The person is identified b.”
How secure is the Sync Day MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Sync Day holds up.
Official endpoint
Operated by Sync Day (sync.day) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If Sync Day adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick Sync Day
Choose Sync Day in the gate directory. No sign-in needed.
Use it anywhere
Sync Day's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools Sync Day exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
create_event — Create a sync.day availability poll and get its share link. Candidate days run from startDate to endDate (inclusive; or give days instead).
parse_event_text — Turn a natural-language sentence (Chinese works best) into create_event input using sync.day's AI parser. Does NOT create anything; review t
get_event — Read an event: settings, every candidate start key per day (startOptions), who has answered (participants with their start keys; names may r
submit_availability — Save (or replace) one person's availability: the candidate start keys they can make, from get_event.startOptions. The person is identified b
remove_participant — Organiser only: remove one participant by name (the oldest row with that name when it repeats), together with their vote. Requires the admin
update_event — Organiser only: change any event settings (same fields and rules as create_event; omitted fields keep their current value; endDate wins over
vote_time — Approval voting: set every start one person accepts (replaces their earlier approvals; an empty list clears them). The voter is the `identit
decide_time — Organiser only: settle on a start time (locks availability picking and voting; the page shows 已定). Pass start=null to reopen. Requires the a
Who runs the Sync Day MCP server?
The Sync Day MCP server at a glance
https://sync.day/mcp/mcpQuestions, answered
Is there an official Sync Day MCP server?
Yes — Sync Day operates its own remote MCP server at sync.day. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect Sync Day to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick Sync Day in the directory. No account or sign-in is needed. From then on, Sync Day's tools are available in every client you've connected to gate.
Do I need to host anything?
No. Sync Day runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the Sync Day MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect Sync Day in minutes. No credit card required.
Connect more than just Sync Day
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up Sync Day in: Claude · Claude Code · ChatGPT · Cursor · VS Code