# net.fsaircraft/catalog (remote · mcp.fsaircraft.net)

Price comparison for Microsoft Flight Simulator add-ons: search, deals, per-store prices, history.

- Trust score: 76/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-25

## Components

- remote · `mcp.fsaircraft.net`: 76/100 (this document), [markdown](https://verifymcp.io/servers/net-fsaircraft-catalog/mcp.md), [page](https://verifymcp.io/servers/net-fsaircraft-catalog/mcp)

## Channel facts

- Endpoint: `https://mcp.fsaircraft.net/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-25.

- **Endpoint Security**: 80/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 86/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 1300 tokens (~100/item across 13 items; 12 tools + 1 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 10/100
  - Stability observed for 3 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 84/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 44% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 12 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 14 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the net.fsaircraft/catalog MCP server?

net.fsaircraft/catalog is a hosted endpoint at https://mcp.fsaircraft.net/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http net-fsaircraft-catalog 'https://mcp.fsaircraft.net/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "net-fsaircraft-catalog": {
      "url": "https://mcp.fsaircraft.net/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "net-fsaircraft-catalog": {
      "type": "http",
      "url": "https://mcp.fsaircraft.net/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.net-fsaircraft-catalog]
url = "https://mcp.fsaircraft.net/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "net-fsaircraft-catalog": {
      "type": "remote",
      "url": "https://mcp.fsaircraft.net/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add net-fsaircraft-catalog --url 'https://mcp.fsaircraft.net/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  net-fsaircraft-catalog:
    url: "https://mcp.fsaircraft.net/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "net-fsaircraft-catalog": {
      "Transport": "http",
      "Url": "https://mcp.fsaircraft.net/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add net-fsaircraft-catalog -t streamable-http -u 'https://mcp.fsaircraft.net/mcp'
```

### Other

```json
{
  "mcpServers": {
    "net-fsaircraft-catalog": {
      "type": "http",
      "url": "https://mcp.fsaircraft.net/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-25 (score 76, +8)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-24 (score 68, 0)

- [security] Tool “compare_prices” rewrote its description, which is the text the model reads
- [security] Tool “price_history” rewrote its description, which is the text the model reads
- [cosmetic] “search_addons” reworded the description of “max_price_eur”

### 2026-09-23 (score 68, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-09-22 (score 68)

First indexed and scored.

## MCP tools (12)

### `search_addons` (~198 tokens)

Search MSFS add-ons

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 compatibility as declared by the selling store.

Input parameters:

- `category` (string): Category slug, e.g. 'aircraft', 'scenery', 'livery', 'utility'
- `limit` (integer)
- `max_price_eur` (number): Inclusive ceiling on the known VAT-excluded price, in euros
- `on_sale` (boolean): Only add-ons currently below their recorded high
- `q` (string): Free text: title, developer, ICAO code or aircraft type
- `sim` (string): Only add-ons declared compatible with this simulator
- `store` (string): Store slug, e.g. 'simmarket' — see list_stores

Output parameters:

- `as_of` (string|null)
- `count` (integer)
- `results` (array)

### `get_addon` (~82 tokens)

Get one add-on

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 airports it implements.

Input parameters:

- `slug` (string, required): Add-on slug, as it appears in https://fsaircraft.net/addons/{slug}

Output parameters:

- `addon`
- `as_of` (string|null)
- `found` (boolean)

### `list_deals` (~101 tokens)

Current 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 markdowns do not appear.

Input parameters:

- `category` (string)
- `ending_within_days` (integer): Only sales with a published end date inside N days
- `limit` (integer)
- `sim` (string)

Output parameters:

- `as_of` (string|null)
- `count` (integer)
- `results` (array)

### `compare_prices` (~62 tokens)

Compare prices across stores

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.

Input parameters:

- `slug` (string, required)

Output parameters:

- `as_of` (string|null)
- `count` (integer)
- `offers` (array)
- `slug` (string)
- `title` (string|null)
- `url` (string|null)

### `price_history` (~61 tokens)

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?".

Input parameters:

- `days` (integer)
- `slug` (string, required)

Output parameters:

- `as_of` (string|null)
- `current_eur_cents`
- `days` (integer)
- `is_lowest_ever` (boolean)
- `max_eur_cents`
- `min_eur_cents`
- `points` (array)
- `price_basis` (string)
- `slug` (string)
- `url` (string|null)

### `list_stores` (~64 tokens)

List tracked 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 search_addons.

Output parameters:

- `as_of` (string|null)
- `count` (integer)
- `stores` (array)

### `list_developers` (~45 tokens)

List developers

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

Input parameters:

- `limit` (integer)
- `q` (string): Substring of the developer name

Output parameters:

- `as_of` (string|null)
- `count` (integer)
- `developers` (array)

### `find_aircraft_type` (~87 tokens)

Find an 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.

Input parameters:

- `limit` (integer)
- `q` (string, required): Designator, model, family or manufacturer

Output parameters:

- `as_of` (string|null)
- `count` (integer)
- `types` (array)

### `list_addons_for_aircraft` (~98 tokens)

Add-ons for an aircraft type

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.

Input parameters:

- `icao_designator` (string, required): ICAO Doc 8643 designator, e.g. 'B738', 'A20N', 'C172'
- `limit` (integer)
- `sim` (string)

Output parameters:

- `as_of` (string|null)
- `count` (integer)
- `icao_designator` (string)
- `results` (array)
- `type`

### `list_sceneries_for_airport` (~78 tokens)

Scenery for an airport

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

Input parameters:

- `icao` (string, required): ICAO code, e.g. 'EGLL', 'KJFK'. IATA also accepted.
- `limit` (integer)
- `sim` (string)

Output parameters:

- `airport`
- `as_of` (string|null)
- `count` (integer)
- `icao` (string)
- `results` (array)

### `search` (~68 tokens)

Search (OpenAI connector alias)

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.

Input parameters:

- `query` (string, required)

Output parameters:

- `results` (array)

### `fetch` (~48 tokens)

Fetch (OpenAI connector alias)

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.

Input parameters:

- `id` (string, required)

Output parameters:

- `id` (string)
- `metadata` (object)
- `text` (string)
- `title` (string)
- `url` (string)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/net-fsaircraft-catalog/mcp#diagnostics

## Score history

- 2026-09-25: 76
- 2026-09-24: 68
- 2026-09-23: 68
- 2026-09-22: 68

## Common questions

### What is the net.fsaircraft/catalog MCP server?

net.fsaircraft/catalog is an MCP server listed in the public MCP registry as net.fsaircraft/catalog. Price comparison for Microsoft Flight Simulator add-ons: search, deals, per-store prices, history. This page covers its hosted endpoint (https://mcp.fsaircraft.net/mcp).

### Is the net.fsaircraft/catalog MCP server safe to use?

net.fsaircraft/catalog scores 76 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the net.fsaircraft/catalog MCP server expose?

net.fsaircraft/catalog exposes 12 tools: search_addons, get_addon, list_deals, compare_prices, price_history, and 7 more. Their descriptions and schemas cost roughly 992 tokens of context every time the server is loaded.

### Does the net.fsaircraft/catalog MCP server require authentication?

No. We connected to net.fsaircraft/catalog without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the net.fsaircraft/catalog MCP server still maintained?

net.fsaircraft/catalog is still listed as active in the MCP registry. We last reached this channel on 25 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://mcp.fsaircraft.net/mcp
- Website: https://fsaircraft.net/docs/mcp
- Changelog RSS feed: https://verifymcp.io/servers/net-fsaircraft-catalog/mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/net-fsaircraft-catalog/mcp.json
- HTML version of this page: https://verifymcp.io/servers/net-fsaircraft-catalog/mcp