flights-mcp
An MCP server for holiday flight planning powered by Google Flights via SerpAPI, enabling real-time flight search, destination discovery, airport comparison, and multi-country trip planning.
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search_flightsSearch for flights using Google Flights data via SerpAPI. Returns best_flights and other_flights with full details (price, duration, stops, airline, aircraft, legroom, amenities, carbon emissions) plus price_insights (lowest price, typical range, price history). Each result includes a booking_token…
get_return_flightsAfter searching one-way outbound flights, use this to get matching return flight options for a selected outbound flight. Pass the departure_token from the outbound search result.
get_booking_optionsGet booking links and price breakdown for a specific flight. Pass the booking_token from a search_flights or get_return_flights result. Returns booking options from different airlines/OTAs with direct links.
find_airportsFind airport IATA codes by city, region, country, or airport name. Use this before searching flights to resolve place names to airport codes — especially useful for finding all airports near a city (e.g. 'Nottingham' returns EMA, BHX, MAN, LHR...) or all major airports in a country/region (e.g. 'Arg…
explore_destinationsDiscover flight destinations and prices from a departure airport using Google Travel Explore. Ideal for open-ended holiday planning: "Where can I fly from London in June?" or "What's cheap from EMA this summer?". Returns a list of destinations with flight price, hotel price, best travel dates, flig…
search_flights_flexibleSearch for flights across a range of dates to find the cheapest day to fly. Returns one result per date sorted by price — ideal for answering "When's the cheapest time to fly to Tokyo in April?". Uses one API credit per date searched (capped at 30 days). Failures on individual dates are returned as…
compare_airport_pricesFind the cheapest departure airport for a trip by searching from all major airports near a location in parallel. Answers "Should I fly from East Midlands, Birmingham, or Manchester to Buenos Aires?". Uses one API credit per airport searched (default 5, max 10). Results are sorted by cheapest price.
plan_multi_stop_tripPlan a multi-leg trip by searching each leg in parallel. Ideal for internal/domestic routing within a multi-country holiday: "I'll be in Buenos Aires on Oct 17, want to visit Patagonia on Oct 23, then end in Santiago on Oct 28 — what are the cheapest flights?" Each stop is resolved to nearby airpor…
plan_open_jaw_tripPlan an open-jaw trip visiting two destinations — fly into one country and out of another without backtracking. Ideal for "Nottingham to Argentina and Chile in October: what's the cheapest combination?". Searches all nearby departure airports at once and compares two itinerary directions: - Option …
check_price_insightsCheck whether flight prices for a route are currently cheap, typical, or expensive. Returns price_insights data: lowest recorded price, typical price range, price level, and a human-readable context string (e.g. "Prices are 18% below typical — good time to book."). Auto-detects round-trip vs one-wa…
find_cheapest_arrival_airportFind the cheapest airport to fly into at a destination by comparing all airports near a location in parallel. The arrival-side counterpart to compare_airport_prices. Answers "Which Tokyo airport is cheapest to fly into from London?" or "Should I fly into EZE or AEP in Buenos Aires?". Uses one API c…
find_stopover_flightsSearch for a split itinerary via a stopover city — fly into a hub, spend N days, then continue to your final destination. E.g. LHR → Dubai (3 days) → NRT. Searches: origin → stopover on outbound_date, stopover → destination on outbound_date + stopover_days. Optionally also searches destination → or…
search_price_calendarSearch a grid of outbound + return date combinations to find the cheapest week to fly. Answers "What's the cheapest combination of July departure and August return for LHR-JFK?". Generates all (outbound, return) pairs from two date ranges (return must be after outbound), capped at 30 combinations s…
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
SERPAPI_KEYS=your_key_hereTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
13/13 tools missing one or more hints — search_flights (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_return_flights (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_booking_options (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +10 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tool inputs are validated
Only 0/13 tool handlers declare input schemas (0%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
Only 0/13 tool handlers wrap calls in try/catch (0%)
Wrap each tool handler body in try/catch and return a structured error response.
License file
No license file
Add a LICENSE file (MIT, Apache-2.0, etc.).
Tests exist
No test files found
Add tests that exercise each declared tool.
Production dependencies are patched
0 critical, 3 high severity in production deps — @modelcontextprotocol/sdk@1.12.0 (high), @modelcontextprotocol/sdk@1.12.0 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
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