Compare MSFS add-on prices MCP server

• Registry namenet.fsaircraft/catalogverified in the MCP registry

The registry name sits under fsaircraft.net. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

• Stateanswerschecked 2026-10-20
• Tools12
• Server calls itselffsaircraft
• Server version1.0.0
• Protocol version2025-06-18

On 2026-10-20 the server answered initialize and tools/list without a sign-in. First answer in 584 ms.

• Whether its tools do the product's job has not been judged yet.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

• INITE MCP score96 of 100answers 100 · definitions 86 · context 100 · connects 100
• Answered100% of days16 of 16 daily checks
• Median first answer569 ms
• Space in an agent's context≈ 1,600 tokensthe definitions of all its tools (12), which an agent carries on every turn
• Tool definitionsB · 86 of 100
• Typed results12 of 12 toolsdeclared outputSchema: results come typed, read once

• Parameters without a description: in 10 of 12

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

• search_addons

  Search the fsaircraft.net catalog of payware Microsoft Flight Simulator add-ons (aircraft, scenery, liveries, utilities) across every tracked store. Returns the cheapest live offer for each add-on with its discount and MSFS 2020/2024…

• get_addon

  Everything the catalog holds on a single add-on: description, developer, declared simulator compatibility, rating, every store offer with its VAT split and sale expiry, the lowest price ever recorded, and the real-world aircraft types and…

• list_deals

  Add-ons discounted right now, deepest discount first. A discount here means the current price is below the highest price we have ever recorded for that same offer at that same store — never a store-printed list price, so permanent…

• compare_prices

  Every store offer for one add-on, in-stock offers with known net prices first, ordered by net EUR price. Includes the listed price, tax status, known net price, EUR conversion, stock, sale expiry and an outbound link.

• price_history

  Daily lowest known VAT-excluded price in EUR, using current exchange rates, plus min/max/current and whether it is at its lowest ever. Answers "has this ever been cheaper than X?".

• list_stores

  Every storefront in the catalog, with how many add-ons we track there, how many are discounted right now, and whether its prices include VAT. Use it to answer "which stores do you actually cover" and to get the `store` slug vocabulary for…

• list_developers

  Add-on studios in the catalog, busiest first, optionally filtered by name.

• find_aircraft_type

  Resolve a plain-language aircraft name ("737 MAX", "Cessna 172", "A320neo") to its ICAO Doc 8643 designator, with how many add-ons we carry for it. Feed the designator to list_addons_for_aircraft.

• list_addons_for_aircraft

  Every add-on implementing one real-world aircraft type, across all studios, cheapest first. The type link is our own classification (from the title and the store metadata), not the store's.

• list_sceneries_for_airport

  Every add-on scenery we carry for one airport, by ICAO (or IATA) code, cheapest first.

• search

  Search the fsaircraft.net MSFS add-on catalog and return documents in the shape ChatGPT deep-research and company-knowledge connectors expect. `id` is the add-on slug; pass it to `fetch`. Prefer search_addons when filters or prices matter.

• fetch

  Retrieve one add-on as a document, by the `id` returned from `search` (the add-on slug). Returns the full description plus every current store price.