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MCP Timezone Planner in Windsurf

Find meeting slots inside everyone's working hours. It converts times between IANA zones with DST read from the ICU data in your Node build, ranks meeting slots where every participant is inside their own working hours, computes the daily overlap and clock changes, and writes .ics files.

Eleven tools out of Cascade's ceiling of 100, no network calls and no account. Because mcp_config.json applies to every workspace, the contacts you save are reachable from whichever project you are in when a client emails.

What you get in Windsurf

You say	Tool
Find an hour next week for me in Warsaw, my client in New York and my designer in London.	`find_meeting_slots`
When are Warsaw and New York both at work?	`overlap`
Write me the .ics for Thursday 3pm Warsaw, 45 minutes.	`ics_create`

Warsaw and New York on 09:00 to 17:00 days share 2 hours on 2026-09-10 and 3 hours on 2026-03-16, because the United States moves to daylight time on 8 March and Europe on 29 March. The overlap is computed on a real date, so it says so.

Install it in Windsurf

The file is mcp_config.json, and the key inside it is mcpServers.

Scope	Path
macOS, Windows and Linux	`~/.codeium/windsurf/mcp_config.json`

If you also run Claude Desktop, the shortest path there is one click: timezone.mcpb from the bundle catalog opens as an extension, with no JSON and no terminal. Windsurf reads its own config, so here it is:

The config block:

{
  "mcpServers": {
    "timezone": {
      "command": "node",
      "args": ["/absolute/path/to/mcp-servers/servers/timezone/dist/index.js"]
    }
  }
}

The node command above wants a built file. From a clone, once:

git clone https://github.com/theluckystrike/mcp-servers.git
cd mcp-servers && npm install
npm run build -w packages/mcp-license -w servers/timezone

That writes servers/timezone/dist/index.js, and its absolute path is the one argument the config needs.

The npm packages are not published yet, so the form below returns a 404 today. It is here because it is what the entry becomes the day the publish lands, with nothing else changed:

{
  "mcpServers": {
    "timezone": {
      "command": "npx",
      "args": ["-y", "@theluckystrike/mcp-timezone"]
    }
  }
}

Save and reopen the MCP Servers list; Cascade picks it up without restarting the editor.

Nothing is published to npm yet, so the working install paths are the ones above: the .mcpb bundle from the bundle catalog, a clone and build, or the hosted URL.

No install: the hosted endpoint

The same server runs at https://mcp.zovo.one/mcp/timezone over MCP streamable HTTP, no install. Mint a free token with curl https://mcp.zovo.one/mcp/token, or use a Pro key. It has no filesystem, so a file comes back as a one-hour download link.

{
  "mcpServers": {
    "timezone": {
      "url": "https://mcp.zovo.one/mcp/timezone",
      "headers": { "Authorization": "Bearer <token>" }
    }
  }
}

Windsurf notes worth knowing first

Read this first: mcp_config.json applies to the legacy Cascade agent only. The Devin Local agent, the default for new tabs, takes its servers from the Devin CLI config files, so a correct entry here can still be invisible in a fresh tab. The other hard number is a cap: Cascade reaches at most 100 tools at once, and every enabled server spends from it.

Free: conversions, overlap, DST and business days unlimited; slots for 3 participants over 5 days, 5 contacts, 3 ics a month. Pro is $19 once, verified offline.

Questions

Where does Windsurf keep its MCP config?

~/.codeium/windsurf/mcp_config.json, under mcpServers. Reach it from the MCPs icon at the top right of the Cascade panel, or Devin Settings, Cascade, MCP Servers.

I edited the file and a new tab still cannot see MCP Timezone Planner.

That file applies to the legacy Cascade agent only. The Devin Local agent, the default for new tabs, reads its servers from the Devin CLI config files instead. Check which agent the tab runs.

How many servers can I load at once?

Cascade reaches at most 100 tools at any one time, and every enabled server spends from that single budget. MCP Timezone Planner contributes 11 tools, so keep the enabled list short rather than counting servers.

MCP Timezone Planner in detail · The same server in VS Code and Cline · Every server in Windsurf · Guides · Windsurf docs · Buy Pro

Related guides & tools

Find a meeting time across time zones without doing the arithmetic · Read a .ics calendar in Claude: free and busy, conflicts, and billable meetings