Leave Hacker is listed as active in the registry but did not answer our last check. It exposes 6 tools.
Which days of annual leave to book around bank holidays for the most days off, and cheap flights.
Uptime history
14 days of history · worst day 0%
14 days agonow
3.3%
Uptime 24h
3 of 92 checks
6
Tools
read from the server
307 ms
Response time
average over 24h
open, no key
Access
streamable-http
What changed 11
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 26 October 2026. No other catalogue keeps this.
6 Nov
3 tool descriptions were rewritten
best_days_to_book, get_school_holidays, plan_leave_year
6 Nov
3 tools changed the parameters they ask for
best_days_to_book, get_school_holidays, plan_leave_year
26 Oct
4 tools changed the parameters they ask for
best_days_to_book, get_bank_holidays, leave_request_message and 1 more
26 Oct
a tool description was rewritten
find_trips
Leave Hacker does not always answer
Over the last week it answered 10.1% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 5 min ago.
run in your terminal
claude mcp add leave-hacker --transport http https://leavehacker.app/mcpSettings → Connectors → Add custom connector, then paste this address
https://leavehacker.app/mcp~/.codex/config.toml
[mcp_servers.leave-hacker]
url = "https://leavehacker.app/mcp".cursor/mcp.json
{
"mcpServers": {
"leave-hacker": {
"url": "https://leavehacker.app/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"leave-hacker": {
"type": "http",
"url": "https://leavehacker.app/mcp"
}
}
}Available tools 6
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
bank
get_bank_holidays
List the bank holidays (UK, from gov.uk) or public holidays (other countries, from Nager.Date) for a region in a year or between two dates, with weekdays and substitute days. Use it for questions like "When are the bank holidays in Scotland in 2027?". Ranges can be up to three years.
best
best_days_to_book
Find the days of annual leave to book around each public holiday (or cluster, such as Christmas and New Year) to get the most days off in a row: "book 4 days, get 10 off" options, cheapest first, with the exact dates. Use for "Which days should I book around Easter 2027 in Scotland?". Filter by holiday name (Easter, Christmas, Early May, Spring, Summer, St Patrick...). Past days are skipped. For parents in the UK, school: parent keeps leave inside the school holidays, using the council's published term dates when you pass council.
leave
leave_request_message
Write the short, polite message asking a manager for the leave days of a break, in the same words as the Leave Hacker app. Pass the dates to book; the break's first and last day are worked out from the weekends (and bank holidays, if you pass region) either side unless you pass them.
plan
plan_leave_year
Plan a whole leave year: the set of breaks that turns the person's annual leave allowance into the most days off, using every bank holiday, with the dates to book for each break and the totals. Handles any leave year start date, part-time working days, three plan styles and school holidays (parents: breaks only in school holidays; school staff: the holidays themselves), from the council's published term dates when you pass council and typical dates otherwise. Use for "Plan my 28 days of leave for 2027, I have kids at school in Leeds".
school
get_school_holidays
School holiday dates in the UK for a calendar year (half terms, Easter, summer, Christmas, and training days). With council, that council's published term dates, each school year with the council's source link and the date Leave Hacker last checked it; for a school year it hasn't published, and without a council, TYPICAL dates, which are the usual pattern and not official (Northern Ireland: the Department of Education's dates). Every holiday says which it is. Academies and independent schools can set their own, so tell the person to check their school's.
trips
find_trips
Find the cheapest return flights from a departure airport that fit a break, one per destination, cheapest first, with booking links. Prices are cached airline fares in the departure country's currency (GBP, EUR, AUD or USD) and can change; if the result says sample, they are example prices only. Links go through leavehacker.app/go and are affiliate links: Leave Hacker may earn a commission if you book, at no extra cost to you. Say so when you share them. Use for "Find cheap flights from Manchester that fit the May bank holiday weekend" (work out the break's dates with best_days_to_book first).
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://leavehacker.app/mcp | streamable-http | answering | 94 ms | 5 min ago |
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Leave Hacker — questions
Answers built from our own checks of this server.
What can Leave Hacker do?
It exposes 6 tools, read directly from the server on our last check. Among them: best_days_to_book, find_trips, get_bank_holidays, get_school_holidays, leave_request_message, plan_leave_year. 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 Leave Hacker working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 3 of 92 checks got a reply (3.3%), average response time 307 ms. The bar chart above shows every period we have measured.
The registry lists Leave Hacker 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 Leave Hacker?
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 Leave Hacker need an API key?
No. Leave Hacker completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 6 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Leave Hacker?
It answers our handshake in 307 ms on average, which is faster than 45% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.