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Cronofy MCP by usefulapi MCP Server

answering

Cronofy MCP by usefulapi is answering right now. Last checked 11 min ago. It exposes 8 tools. Last commit 2 Nov 2026.

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

Uptime history 91 days of history · worst day 25%
91 days agonow
100.0%
Uptime 24h
91 of 91 checks
8
Tools
read from the server
159 ms
Response time
average over 24h
1
Stars
last commit 2 Nov 2026

What changed 40

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 1 October 2026. No other catalogue keeps this.

2 Nov a tool changed version
31 Oct a tool changed version4 times that day
30 Oct a tool changed version2 times that day
29 Oct a tool changed version2 times that day
28 Oct a tool changed version2 times that day
27 Oct a tool changed version
25 Oct a tool changed version4 times that day
24 Oct a tool changed version3 times that day
23 Oct a tool changed version
22 Oct a tool changed version
and 30 more, back to 1 October 2026

What the code does

We read the source, 22 h ago · tools taken from the live server · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

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Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.

run in your terminal
claude mcp add cronofy --transport http https://cronofy.usefulapi.io/mcp
Settings → Connectors → Add custom connector, then paste this address
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
{
  "servers": {
    "cronofy": {
      "type": "http",
      "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 73 ms 11 min ago

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Cronofy MCP by usefulapi — questions

Answers built from our own checks of this server.

What can Cronofy MCP by usefulapi 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 MCP by usefulapi working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 159 ms. The bar chart above shows every period we have measured.
How do I connect Cronofy MCP by usefulapi?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Cronofy MCP by usefulapi need an API key?
No. Cronofy MCP by usefulapi 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 MCP by usefulapi?
It answers our handshake in 159 ms on average, which is faster than 81% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Cronofy MCP by usefulapi open source?
The code is open source: it is published under the MIT licence, written in JavaScript, 1 stars on GitHub and 1 open issue. The licence covers the code in the repository, not the hosted service at cronofy.usefulapi.io, which runs on its operator's own terms.