mcpbeat

Cronofy MCP Server

io.usefulapi/cronofy
not responding

Cronofy is listed as active in the registry but did not answer our last check. It exposes 8 tools. Last commit 1 Aug 2026.

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

Uptime history 41 hours of history · worst hour 0%
41 hours agonow
25.3%
Uptime 24h
23 of 91 checks
8
Tools
read from the server
161 ms
Response time
average over 24h
0
Stars
last commit 1 Aug 2026

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 6 min ago.

run in your terminal
claude mcp add cronofy --transport http https://cronofy.usefulapi.io/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "cronofy": {
      "url": "https://cronofy.usefulapi.io/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.cronofy]
url = "https://cronofy.usefulapi.io/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "cronofy": {
      "url": "https://cronofy.usefulapi.io/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "cronofy": {
      "url": "https://cronofy.usefulapi.io/mcp"
    }
  }
}

Available tools 8

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

cronofy
cronofy_delete_event
Deletes an event (by your event_id) from a real connected calendar. Destructive. API: DELETE /v1/calendars/{calendar_id}/events.
cronofy_get_account
Get the authenticated Cronofy account's details (id, email, name, default tzid, locale). API: GET /v1/account.
cronofy_get_free_busy
Read free/busy information across the account's calendars over a time window. Returns { pages, free_busy }. API: GET /v1/free_busy.
cronofy_get_userinfo
Get the OpenID-style profile of the authenticated user (sub, email, Cronofy profile info). API: GET /v1/userinfo.
cronofy_list_calendars
List all calendars the authenticated account can see (id, name, profile, readonly, primary). API: GET /v1/calendars.
cronofy_list_profiles
List the connected calendar accounts/profiles (e.g. Google, Office 365) linked to this Cronofy account. API: GET /v1/profiles.
cronofy_read_events
Read events across the account's calendars over a time window. Returns { pages, events }. API: GET /v1/events.
cronofy_upsert_event
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.

Endpoints

URLTransportStateLatencyChecked
https://cronofy.usefulapi.io/mcp streamable-http answering 43 ms 6 min ago

Cronofy — questions

Answers built from our own checks of this server.

What can Cronofy do?
It exposes 8 tools, read directly from the server on our last check. Among them: cronofy_delete_event, cronofy_get_account, cronofy_get_free_busy, cronofy_get_userinfo, cronofy_list_calendars, cronofy_list_profiles and 2 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Cronofy working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 23 of 91 checks got a reply (25.3%), average response time 161 ms. The bar chart above shows every period we have measured.
The registry lists Cronofy as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Cronofy?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Cronofy need an API key?
No. Cronofy completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 8 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Cronofy?
It answers our handshake in 161 ms on average, which is faster than 71% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Cronofy open source?
Yes — it is published under the MIT licence, written in JavaScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.