a2bflight fares
REMOTE · MCP.A2BFLIGHT.COM
Flight fares seen on thousands of routes, each dated, and where a group can meet. Not live. No key.
Available components
Last scanned (38 minutes ago)
Scores higher than 87% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Maps and Location
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 Usability62
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 1178 tokens (~235/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 Management100
- No destabilizing schema changes in the last 30 days.Pass
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
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
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.
- 1 Nov 26 +1
- Stability: 0.97 → pass security
- 30 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.
- 28 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.
- 27 Oct 26 −2
- The server rewrote its instructions, which are the text every model session reads security
- Tool “cheapest_routes” rewrote its description, which is the text the model reads security
- Tool “route_fares” rewrote its description, which is the text the model reads security
- Schema quality: 195 → 235 ▼ functional
- Schema quality: excellent → good functional
- New tool “meet_link” functional
- New tool “where_to_meet” functional
- 25 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.
- 23 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 67 to 70. That category is still filling its 30-day observation window: 20 days of observed history at the previous scan, 21 at this one. The score rises as the window fills, whether or not the server changes.
- 21 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 60 to 63. That category is still filling its 30-day observation window: 18 days of observed history at the previous scan, 19 at this one. The score rises as the window fills, whether or not the server changes.
- 19 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.
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://mcp.a2bflight.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=a2bflight.com | CN=YE2,O=Let's Encrypt,C=US | 18 Sept 2026 | 17 Dec 2026 | ECDSA 256 | ECDSA-SHA384 | 540b355b778bfd30fb141e39ea2ebe8c346 |
| SANs: *.a2bflight.com, a2bflight.com | ||||||
| CN=YE2,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 4df3b15dd6c0784c507cd37b58e6f115 |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of mcp.a2bflight.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| a2bflight.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://mcp.a2bflight.com/mcp | Verified | 200 | |
| http (plaintext) | http://mcp.a2bflight.com/mcp | HTTPS enforced | 301 | https://mcp.a2bflight.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 →
cheapest_routes Cheapest routes ~227
The cheapest cached fare on every route we hold from an origin (or into a destination), cheapest one-way first, each with its cheapest round trip of a 3 to 21 day stay in `return` when we hold one. Filter by a maximum price and a departure month here rather than by reading the list; both apply to the one-way. Prices are one adult, economy, as seen on the date in `seen` (or last checked on `checked` when a row has none) — observations, not quotes.
| Name | Type | Req | Description |
|---|---|---|---|
| from | string | – | origin IATA airport or city code (NYC covers JFK, LGA and EWR); give from, to or both |
| limit | integer | – | how many routes to return, 1 to 20; 10 when omitted |
| max_price | number | – | keep only fares at or under this amount, in the currency the results carry |
| month | string | – | YYYY-MM: the cheapest fare departing in that month; needs from |
| to | string | – | destination IATA airport or city code |
| Name | Type | Req | Description |
|---|---|---|---|
| currency | string | – | – |
| note | string | – | – |
| routes | null|array | yes | – |
No examples provided.
find_airports Find airports ~99
Look up airports and city codes by name, or list the airports near a code or a lat,lon point. Use it to turn a city name into the IATA code the other tools take.
| Name | Type | Req | Description |
|---|---|---|---|
| near | string | – | an IATA code, or lat,lon, to list the airports near it; give this or query |
| query | string | – | a city or airport name or the start of one; give this or near |
| Name | Type | Req | Description |
|---|---|---|---|
| places | null|array | yes | – |
No examples provided.
meet_link Group trip link ~251
A link to a2bflight.com's group page for people flying from different homes to meet in one place. Use it when the user already knows where; where_to_meet when they ask where. Without dates it picks the weekend whose round trips we have seen price everyone, with each fare and the total; with dates it quotes no price, and the page shows each person's cheapest fare we have seen for them or the closest. A warning says why the fares are a poor option and what to try instead: pass it on.
| Name | Type | Req | Description |
|---|---|---|---|
| back | string | – | YYYY-MM-DD: the day everyone flies home |
| members | null|array | yes | 2 to 8 people, each flying from their own home; person 1 first |
| mode | string | – | cheapest_total (the default: the lowest sum), fairest (the lowest dearest ticket), least_travel (the least flying time) or earliest_together (everyone landed soonest) |
| out | string | – | YYYY-MM-DD: the day they meet; leave out and back both empty for a suggested long weekend |
| to | string | yes | the IATA airport where they all meet — an airport, not a city code |
| Name | Type | Req | Description |
|---|---|---|---|
| back | string | yes | – |
| currency | string | – | – |
| dates | string | yes | asked: the user's dates; priced: the weekend of the next eight whose round trips we have seen price everyone, cheapest summed; suggested: no weekend does, so a long weekend three weeks out, whose pag… |
| fares | null|array | – | on priced dates, each person's cheapest round trip, in the order of members |
| meet_url | string | yes | the group's page on a2bflight.com with everyone filled in — give the user this link |
| members | null|array | yes | – |
| out | string | yes | – |
| to | string | yes | – |
| to_city | string | yes | – |
| total | number | – | on priced dates, the fares added up; absent when anyone is more than one adult or the currencies differ |
| warning | string | – | why these fares are a poor option and what to try instead — tell the user both |
No examples provided.
route_fares Route fares ~144
Everything we hold for one airport pair: the cheapest one-way, the cheapest round trip of a 3 to 21 day stay, the cheapest one-way by departure date and by month, and the cheapest round trips. When we hold no fare for the pair, it looks the route up at our fare source; if the fares are not back in time it answers status "pricing", and asking again a minute later reads them.
| Name | Type | Req | Description |
|---|---|---|---|
| from | string | yes | origin IATA airport code (an airport, not a city code) |
| month | string | – | YYYY-MM: keep only departure dates in that month |
| to | string | yes | destination IATA airport code |
| Name | Type | Req | Description |
|---|---|---|---|
| cheapest | null|object | – | the cheapest one-way; absent when we hold no dated one-way |
| cheapest_return | null|object | – | the cheapest round trip of a 3 to 21 day stay; absent when we hold none, and page_url then offers a live return search |
| currency | string | – | – |
| dates | null|array | – | the cheapest one-way fares by departure date, cheapest first |
| from | string | yes | – |
| months | null|array | – | the cheapest one-way fare in each month |
| page_url | string | yes | – |
| returns | null|array | – | the cheapest round trips held, any stay, cheapest first |
| status | string | yes | held: fares below; pricing: the route is still being looked up, ask again in a minute; none: we hold no fare for it |
| to | string | yes | – |
No examples provided.
where_to_meet Where to meet ~230
Where 2 to 8 people flying from different homes can meet cheapest: the places every home has a route into, each with a weekend whose cached round trips price everyone, each person's fare, the total, and meet_url — the group's page with all of it filled in. A place with a warning is a poor option: say why, and offer the better pick it names. Prices are one adult, economy, as seen on `seen` (or last checked on `checked` when a fare has none).
| Name | Type | Req | Description |
|---|---|---|---|
| homes | null|array | yes | 2 to 8 home airports or city codes, one per person, person 1 first (NYC covers JFK, LGA and EWR) |
| limit | integer | – | how many places to return, 1 to 8; 5 when omitted |
| month | string | – | YYYY-MM: meet on a weekend in that month; the next eight weekends from two weeks out when omitted |
| nights | integer | – | nights they stay, 1 to 14; 3 (Friday to Monday) when omitted |
| Name | Type | Req | Description |
|---|---|---|---|
| note | string | – | – |
| places | null|array | yes | – |
No examples provided.
How do I install the a2bflight fares MCP server?
a2bflight fares is a hosted endpoint at https://mcp.a2bflight.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 · mcp.a2bflight.com
claude mcp add --transport http com-a2bflight-fares 'https://mcp.a2bflight.com/mcp'
What is the a2bflight fares MCP server?
a2bflight fares is an MCP server listed in the public MCP registry as com.a2bflight/fares. Flight fares seen on thousands of routes, each dated, and where a group can meet. Not live. No key. This page covers its hosted endpoint (https://mcp.a2bflight.com/mcp).
Is the a2bflight fares MCP server safe to use?
a2bflight fares scores 83 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 a2bflight fares MCP server expose?
a2bflight fares exposes 5 tools: cheapest_routes, find_airports, meet_link, route_fares, where_to_meet. Their descriptions and schemas cost roughly 951 tokens of context every time the server is loaded.
Does the a2bflight fares MCP server require authentication?
No. We connected to a2bflight fares without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the a2bflight fares MCP server still maintained?
a2bflight fares 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.