Find and verify business and first class fares, deals and miles options across long-haul routes.
Connects to Aviasales fare data and live airline and OTA checks. Muse can search business and first class fares between cities, rank cheap destinations from a home airport, surface deals below route history, compare nearby departure hubs, weigh cash against miles and points, and open a booking link once dates are confirmed.
Try asking Muse: "Find me the cheapest business class round trip from Chicago to Milan in October and check whether the fare I saw is actually a good price."
Source: Found in the official MCP Registry (flights.flat/business-class-fares) · First listed November 14, 2026
Each bar is one check, every 15 minutes. Green means it answered. Last checked 2 h ago.
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
musedirectory.ai is not part of Meta. More about how Muse handles your information
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://flat.flights/mcp/Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Flat Flights is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
In Claude, open Settings, then Connectors.
Choose Add custom connector, give it a name, and paste the link.
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://flat.flights/mcp/Response time at the last check: 159ms. Worked in n/a of checks over 30 days.
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
search_business_class_faresCheapest round-trip business class fare between two cities, with dates, stops, cheapest departure month, cheapest nonstop and one-way fares, nonstop flights seen (airline, flight, airports), a lie-flat assessment and a booking link that opens a search on the quoted fare's dates (cheapest_business_class_fromLong-haul destinations from a departure city ranked by cheapest round-trip business class fare. Use for "where can I fly business class cheaply from X".cheapest_business_class_toDeparture cities ranked by cheapest round-trip business class fare to a destination. Use for "cheapest place to fly business class to X from".business_class_dealsLong-haul business class routes currently priced at least 20% below their own daily price history or distance-band median, ranked by biggest discount. Optional `from` filters to one departure city.first_class_faresFirst Class suites & flagship cabins (trip_class=2) round-trip fares on long-haul routes from Aviasales data, ranked cheapest first, with First Class booking links. Optional `from` filters to one departure city.check_business_or_first_priceBusiness class & First class price check: evaluates whether a fare quoted elsewhere (in EUR, round trip per adult) is a steal, good, fair or overpriced vs our daily route history and distance benchmark, and returns a cheaper Aviasales booking link if we observed a lower price.compare_departure_hubsBusiness class & First class positioning comparison: checks nearby and same-country departure airports/cities to the same destination to find €500–€2,500+ savings (e.g. flying from Milan, Dublin, Warsaw or Madrid instead of London, Zurich or Frankfurt).cash_vs_miles_optionsBusiness class miles & credit card transfer calculator: compares today’s cheapest cash fare on Aviasales with published/derived saver award bands across 19 airline programs (Avios, Flying Blue, Aeroplan, KrisFlyer, Miles & More, ANA, Skywards…) and 43 bank point programs (Amex, Cverify_live_flight_offersReal-time flight verification (~8 seconds): queries airlines and OTAs live for exact dates to confirm bookable EUR prices right now, operating airlines, flight numbers, widebody vs narrowbody aircraft on each leg, and a `directCheckoutLink` that opens the airline or OTA booking chttps://flat.flights/mcp/Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Flat Flights to help me. It is a free service with an MCP server at https://flat.flights/mcp/. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
At the last check (November 14, 2026, 14:51 UTC) the endpoint was working, answering in 159ms. It is checked every 15 minutes.
It was screened on November 14, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
It exposes 9 tools, including search_business_class_fares, cheapest_business_class_from, cheapest_business_class_to, business_class_deals. For example, you could ask Muse: "Find me the cheapest business class round trip from Chicago to Milan in October and check whether the fare I saw is actually a good price."
This listing was added from public sources (Found in the official MCP Registry (flights.flat/business-class-fares)). If you build Flat Flights, claim it to correct the details and get your badge.
Paste this on your site or README. It always shows the latest check.
<a href="https://musedirectory.ai/connector/flat-flights"><img src="https://musedirectory.ai/badge/flat-flights.svg" alt="Flat Flights on musedirectory.ai" width="236" height="40"></a>