Cronofy MCP by usefulapi

Server Details

MCP server for Cronofy — read calendars, events and free/busy, and create, update or delete events.

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Status: Healthy
Uptime: 70.7% over 54 days
Last Tested: 2026-10-10 12:03
Transport: Streamable HTTP · MCP 2025-06-18
URL
Repository: m190/usefulapi-mcp
GitHub Stars: 0

TDQS

A3.9/5.0

Scored 2026-09-10 22:50 across 8 tools

Disambiguation4/5

Each tool maps to a distinct resource/action, but get_account and get_userinfo are close enough to cause occasional misclassification. free_busy vs read_events are similar reads over calendars but clearly differentiated by availability vs event details.

Naming Consistency4/5

All names share the cronofy_ prefix and verb_noun snake_case pattern, but retrieval verbs are mixed (get_account, list_calendars, read_events). This is a minor consistency break rather than a chaotic scheme.

Tool Count5/5

Eight tools is well-scoped for a calendar connectivity server. Each tool covers a meaningful operation without redundancy or bloat.

Completeness4/5

The core lifecycle is covered: list calendars, read/upsert/delete events, free/busy, plus account and profile info. Minor gaps like direct single-event lookup or calendar management are workaround-able via read_events.

Available Tools

8 tools

cronofy_delete_eventDelete event

Destructive

Inspect

Deletes an event (by your event_id) from a real connected calendar. Destructive. API: DELETE /v1/calendars/{calendar_id}/events.

ParametersJSON Schema

Name	Required	Description	Default
`event_id`	Yes	YOUR event_id for the event to delete (sent in the JSON body).
`calendar_id`	Yes	Calendar id the event lives on.

cronofy_get_accountGet account

Read-only

Inspect

Get the authenticated Cronofy account's details (id, email, name, default tzid, locale). API: GET /v1/account.

ParametersJSON Schema

Name	Required	Description	Default
No parameters

cronofy_get_free_busyGet free/busy

Read-only

Inspect

Read free/busy information across the account's calendars over a time window. Returns { pages, free_busy }. API: GET /v1/free_busy.

ParametersJSON Schema

Name	Required	Description
`to`	No	End of the window — date (yyyy-mm-dd) or ISO 8601 datetime.
`from`	No	Start of the window — date (yyyy-mm-dd) or ISO 8601 datetime.
`tzid`	Yes	REQUIRED time zone id for the response, e.g. "Etc/UTC".
`calendar_ids`	No	Restrict to these calendar ids (sent as repeated calendar_ids[] params).
`include_managed`	No	Include events created via the Cronofy API. Default false.

cronofy_get_userinfoGet userinfo

Read-only

Inspect

Get the OpenID-style profile of the authenticated user (sub, email, Cronofy profile info). API: GET /v1/userinfo.

ParametersJSON Schema

Name	Required	Description	Default
No parameters

cronofy_list_calendarsList calendars

Read-only

Inspect

List all calendars the authenticated account can see (id, name, profile, readonly, primary). API: GET /v1/calendars.

ParametersJSON Schema

Name	Required	Description	Default
No parameters

cronofy_list_profilesList profiles

Read-only

Inspect

List the connected calendar accounts/profiles (e.g. Google, Office 365) linked to this Cronofy account. API: GET /v1/profiles.

ParametersJSON Schema

Name	Required	Description	Default
No parameters

cronofy_read_eventsRead events

Read-only

Inspect

Read events across the account's calendars over a time window. Returns { pages, events }. API: GET /v1/events.

ParametersJSON Schema

Name	Required	Description
`to`	No	End of the window — date (yyyy-mm-dd) or ISO 8601 datetime.
`from`	No	Start of the window — date (yyyy-mm-dd) or ISO 8601 datetime.
`tzid`	Yes	REQUIRED time zone id for the response, e.g. "Etc/UTC" or "America/New_York".
`calendar_ids`	No	Restrict to these calendar ids (sent as repeated calendar_ids[] params).
`only_managed`	No	Return only events created via the Cronofy API. Default false.
`last_modified`	No	Only events modified since this ISO 8601 datetime.
`include_deleted`	No	Include deleted events. Default false.
`include_managed`	No	Include events created via the Cronofy API. Default false.

cronofy_upsert_eventCreate or update event

Destructive

Inspect

Creates or updates an event on a REAL connected calendar (upsert by event_id). This writes to the user's actual calendar. API: POST /v1/calendars/{calendar_id}/events.

ParametersJSON Schema

Name	Required	Description
`end`	Yes	Event end — ISO 8601 datetime or a date (yyyy-mm-dd) string.
`tzid`	No	Time zone id for the start/end, e.g. "America/New_York".
`start`	Yes	Event start — ISO 8601 datetime or a date (yyyy-mm-dd) string.
`summary`	Yes	Event title/summary.
`event_id`	Yes	YOUR unique id for the event. Re-using it updates the same event.
`calendar_id`	Yes	Target calendar id (from cronofy_list_calendars).
`description`	No	Event description/body.
`location_description`	No	Free-text location (sent as location.description).