Free no-signup group scheduling; share a link and rank times by who's free.
Connect Remote server
claude mcp add --transport http sync-day https://sync.day/mcp/mcp
{
"mcpServers": {
"sync-day": {
"url": "https://sync.day/mcp/mcp"
}
}
}
{
"servers": {
"sync-day": {
"type": "http",
"url": "https://sync.day/mcp/mcp"
}
}
}
Settings > Connectors > Add custom connector
URL: https://sync.day/mcp/mcp
Tools 8 found in our last check
create_eventCreate a sync.day availability poll and get its share link. Candidate days run from startDate to endDate (inclusive; or give days instead). Each day offers candidate START times from hourFrom, every startStepMinutes, as long as start + durationMinutes <= hourTo. Returns slug, pu…
parse_event_textTurn a natural-language sentence (Chinese works best) into create_event input using sync.day's AI parser. Does NOT create anything; review the result, then call create_event. Example: '下周六或周日下午聚餐,大概 3 小时'.
get_eventRead an event: settings, every candidate start key per day (startOptions), who has answered (participants with their start keys; names may repeat), the top 10 start times by head-count (ranked), the starts EVERYONE with picks can make with their votes (voteOptions), each person'…
submit_availabilitySave (or replace) one person's availability: the candidate start keys they can make, from get_event.startOptions. The person is identified by `identity`, not by name: the same identity later overwrites the same row (and can rename it), a different identity with the same name is…
remove_participantOrganiser only: remove one participant by name (the oldest row with that name when it repeats), together with their vote. Requires the adminKey from create_event.
update_eventOrganiser only: change any event settings (same fields and rules as create_event; omitted fields keep their current value; endDate wins over days). Existing picks are kept; those no longer valid starts are just hidden.
vote_timeApproval voting: set every start one person accepts (replaces their earlier approvals; an empty list clears them). The voter is the `identity` used in submit_availability and must have at least one start saved. Only keys listed in get_event.voteOptions are accepted; the error li…
decide_timeOrganiser only: settle on a start time (locks availability picking and voting; the page shows 已定). Pass start=null to reopen. Requires the adminKey from create_event.
Details
| Endpoint | https://sync.day/mcp/mcp (Streamable HTTP) |
| First published | 5 Sep 2026 |
| Last updated | 5 Sep 2026 |
| Registry name | io.github.syncday-app/sync-day |
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