Airfare Brain
REMOTE · AIRFAREBRAIN.COM
True cost of flight extras (bags, seats, fees) on 29 airlines in Europe and North America, sourced.
Available components
Last scanned (12 hours ago)
Scores higher than 61% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Finance and Payments
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. How we score → Why this is hard to score →
Endpoint Security74
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability60
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 1257 tokens (~251/item across 5 items; 5 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management53
- Stability observed for 16 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 4 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 47 to 50. That category is still filling its 30-day observation window: 14 days of observed history at the previous scan, 15 at this one. The score rises as the window fills, whether or not the server changes.
- 2 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 40 to 43. That category is still filling its 30-day observation window: 12 days of observed history at the previous scan, 13 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.
- 30 Oct 26 0
- Schema quality: 222 → 251 ▼ functional
- “trip_at_airport” added an optional parameter “domestic” cosmetic
- “trip_at_airport” added an optional parameter “group_bags” cosmetic
- “true_cost” added an optional parameter “domestic” cosmetic
- “true_cost” added an optional parameter “group_bags” cosmetic
- 29 Oct 26 +2
- Schema quality: 183 → 222 ▼ functional
- Tool coverage: 48% → 100% ▲ functional
- Server version: 1.0.5 → 1.0.6 functional
- “airline_fees” reworded the description of “category” cosmetic
- “airline_fees” reworded the description of “currency” cosmetic
- “trip_at_airport” reworded the description of “cabin_bag” cosmetic
- “trip_at_airport” reworded the description of “checked_bag_kg” cosmetic
- “trip_at_airport” reworded the description of “currency” cosmetic
- “trip_at_airport” reworded the description of “hold_bags” cosmetic
- “trip_at_airport” reworded the description of “infants” cosmetic
- “trip_at_airport” reworded the description of “passengers” cosmetic
- “trip_at_airport” reworded the description of “priority” cosmetic
- “trip_at_airport” reworded the description of “seat” cosmetic
- “trip_at_airport” reworded the description of “trip” cosmetic
- “true_cost” reworded the description of “currency” cosmetic
- “true_cost” reworded the description of “priority” cosmetic
- “true_cost” reworded the description of “trip” cosmetic
- 27 Oct 26 +1
- The server rewrote its instructions, which are the text every model session reads security
- Tool “get_capabilities” rewrote its description, which is the text the model reads security
- Tool “trip_at_airport” rewrote its description, which is the text the model reads security
- Server version: 1.0.0 → 1.0.5 functional
- 25 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.
- 24 Oct 26 −1
- Schema quality: 166 → 187 ▼ functional
- Tool coverage: 64% → 48% ▼ functional
- New tool “trip_at_airport” functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://airfarebrain.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=airfarebrain.com | CN=WE1,O=Google Trust Services,C=US | 19 Oct 2026 | 17 Jan 2027 | ECDSA 256 | ECDSA-SHA256 | 89027a1e2d3321f4136af0275cca4c2e |
| SANs: airfarebrain.com | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of airfarebrain.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| airfarebrain.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://airfarebrain.com/mcp | Verified | 200 | |
| http (plaintext) | http://airfarebrain.com/mcp | HTTPS enforced | 301 | https://airfarebrain.com/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
airline_fees Airline fees ~139
One airline's published extra fees (bags, seats, priority, check-in, changes, payment), each with the price range, when bought (at booking / later / airport), how it is charged, its source URL and the date checked. Optionally filter by category.
| Name | Type | Req | Description |
|---|---|---|---|
| airline | string | yes | Name or IATA code, e.g. 'Ryanair', 'FR', 'easyJet', 'W6' |
| category | string | – | Only fees of this kind; omit for every fee the airline publishes |
| currency | string | – | Currency of the answer: EUR (default) or GBP, as the airline publishes it |
| Name | Type | Req | Description |
|---|---|---|---|
| airline | string | – | – |
| error | string | – | – |
| fees | array | – | – |
| note | string | – | – |
| page | string | – | – |
No examples provided.
get_capabilities Get capabilities ~48
What Airfare Brain covers: airlines, how fees are researched and dated, what it does NOT do (no live fares, no booking), and what car hire at the destination airport typically costs.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| airlines | array | – | – |
| error | string | – | – |
| method | string | – | – |
| note | string | – | – |
No examples provided.
list_airlines List airlines ~34
List every airline with a fee table: name, IATA code, the date its fees were checked, and its page.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| airlines | array | – | – |
| error | string | – | – |
| note | string | – | – |
No examples provided.
trip_at_airport Trip at airport ~471
The whole trip into one airport in one answer: the flight's extras on an airline (bags, seats, fees, as true_cost) AND what car hire there really costs (Car Rental Brain's measured median per day, car only, dated). Use for 'flying to Faro with Ryanair, bags and a hire car: what will it cost?'. Car only: deposits, second-driver fees and desk cover are not included; the answer links to the airport's full car-hire report.
| Name | Type | Req | Description |
|---|---|---|---|
| airline | string | – | Airline name or IATA code (optional; without it you get car hire only) |
| airport | string | yes | IATA code or name of the airport you fly INTO, e.g. 'FAO', 'Faro', 'Malaga' |
| cabin_bag | boolean | – | A large cabin bag for the overhead locker (the small under-seat bag is free) |
| car_days | integer | – | Days of car hire (default 7) |
| checked_bag_kg | integer | – | Checked bag(s) per person of this weight allowance, e.g. 20 or 23; omit for none |
| currency | string | – | Currency of the answer: EUR (default) or GBP, as the airline publishes it |
| domestic | boolean | – | true for a flight within the US: US airlines charge different bag prices there than on international routes |
| fare | number | – | Total fare for the whole party, if known |
| group_bags | integer | – | Checked bags shared by the whole party, fewer than the people (e.g. 1 bag between 2): priced as that many 1st bags; needs checked_bag_kg |
| hold_bags | integer | – | Checked bags per person (default 1); the 2nd bag often costs more |
| infants | integer | – | Under-2s on a lap (default 0) |
| passengers | integer | – | People aged 2+ (default 1) |
| priority | boolean | – | Priority boarding |
| seat | string | – | Paid seat choice: none (random seat), standard, or extra (legroom / front) |
| trip | string | – | one_way (default) or return: return counts each extra on both flights |
| Name | Type | Req | Description |
|---|---|---|---|
| airport | object | – | – |
| car_hire | object | – | – |
| error | string | – | – |
| flight | object | – | – |
| note | string | – | – |
No examples provided.
true_cost True cost ~387
The true cost of a flight on one airline. Pass `fare` (the total for the whole party, from a flight-search tool or the person) to get fare + extras; without it you get the extras alone. Extras = what the person chooses (cabin bag, checked bag by kg, seat, priority, infants) for their party and trip, as the range the airline publishes. Also lists what costs more if left until the airport, unchosen fees that may apply (admin, card %), and extras the airline does not publish a price for.
| Name | Type | Req | Description |
|---|---|---|---|
| airline | string | yes | Name or IATA code |
| cabin_bag | boolean | – | A large cabin bag for the overhead locker |
| checked_bag_kg | integer | – | Checked bag(s) per person of this weight allowance |
| currency | string | – | Currency of the answer: EUR (default) or GBP, as the airline publishes it |
| domestic | boolean | – | true for a flight within the US: US airlines charge different bag prices there than on international routes |
| fare | number | – | Total fare already found for the whole party, if known |
| group_bags | integer | – | Checked bags shared by the whole party, fewer than the people (e.g. 1 bag between 2): priced as that many 1st bags; needs checked_bag_kg |
| hold_bags | integer | – | Checked bags per person (default 1); the 2nd bag often costs more |
| infants | integer | – | Under-2s on a lap |
| passengers | integer | – | People aged 2+ (default 1) |
| priority | boolean | – | Priority boarding |
| seat | string | – | extra = legroom / front |
| trip | string | – | one_way (default) or return: return counts each extra on both flights |
| Name | Type | Req | Description |
|---|---|---|---|
| airline | string | – | – |
| error | string | – | – |
| extras_total | string | – | – |
| lines | array | – | – |
| note | string | – | – |
| page | string | – | – |
| true_cost | string | – | – |
No examples provided.
How do I install the Airfare Brain MCP server?
Airfare Brain is a hosted endpoint at https://airfarebrain.com/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.
remote · airfarebrain.com
claude mcp add --transport http com-airfarebrain-airfare-brain 'https://airfarebrain.com/mcp'
What is the Airfare Brain MCP server?
Airfare Brain is an MCP server listed in the public MCP registry as com.airfarebrain/airfare-brain. True cost of flight extras (bags, seats, fees) on 29 airlines in Europe and North America, sourced. This page covers its hosted endpoint (https://airfarebrain.com/mcp).
Is the Airfare Brain MCP server safe to use?
Airfare Brain scores 74 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 Airfare Brain MCP server expose?
Airfare Brain exposes 5 tools: get_capabilities, list_airlines, airline_fees, true_cost, trip_at_airport. Their descriptions and schemas cost roughly 1,079 tokens of context every time the server is loaded.
Does the Airfare Brain MCP server require authentication?
No. We connected to Airfare Brain without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Airfare Brain MCP server still maintained?
Airfare Brain is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.