Staff leave and PTO: requests, approvals, balances, who is out and a calendar export. You add employees with an annual allowance and carried-over days, then requests arrive as vacation, sick, unpaid or parental, full day or half day, inclusive dates. Approve or reject with a reason, re-open a rejected one by approving it, and cancel via leave_reject with a reason. leave_balance is derived on the call (allowance plus carry-over minus approved and pending, rounded down to whole days plus a half day), leave_out_range answers who is out for coverage and calendars with pending counted as a plan, and the import and ICS export move the ledger in and out. EMP and LV numbers are sequential and never reissued.
Ten tools against Cascade's ceiling of 100, and it pairs naturally with mcp-onboarding, which sets the hire up before their first leave request, and mcp-spreadsheet, which reads the exported ICS; budget the pair at roughly 17 tools when you decide what else fits alongside them.
| You say | Tool |
|---|---|
| Add Taylor Wren, 25 days a year, 2 carried over from last year. | leave_employee_add |
| Taylor wants next Tuesday to Wednesday off, vacation. | leave_request |
| Who is out the week of the 12th, and can I get Taylor's balance? | leave_out_range then leave_balance |
The unit suite is 21 tests, 21 passing, 0 failing (node --test, node v22), covering the balance arithmetic, half days, the re-open path and the out-range deduplication, with adversarial, concurrency, paths and contract suites alongside it.
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: leave.mcpb
from the latest release opens as an extension, with no JSON and no terminal.
Windsurf reads its own config, so here it is:
The config block:
{
"mcpServers": {
"leave": {
"command": "node",
"args": ["/absolute/path/to/mcp-servers/servers/leave/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/leaveThat writes servers/leave/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": {
"leave": {
"command": "npx",
"args": ["-y", "@theluckystrike/mcp-leave"]
}
}
}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 latest release, a clone and build, or the hosted URL.
The same server runs at https://mcp.zovo.one/mcp/leave 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": {
"leave": {
"url": "https://mcp.zovo.one/mcp/leave",
"headers": { "Authorization": "Bearer <token>" }
}
}
}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: Employees, requests, approvals, rejections, balances, the out-range view and the lists are free and unlimited; nothing a manager decides in a morning sits behind a paywall. Reads are free on every tier. Pro is $19 once, verified offline.
~/.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.
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.
Cascade reaches at most 100 tools at any one time, and every enabled server spends from that single budget. MCP Leave Tracker contributes 10 tools, so keep the enabled list short rather than counting servers.
MCP Leave Tracker in detail · The same server in VS Code and Cline · Every server in Windsurf · Guides · Windsurf docs · Buy Pro