Read-only flight fares for AI assistants: the cheapest fares a2bflight has seen on thousands of routes, one-way and round trip, each with the day it was seen. **Cached, not live prices** — each fare links to its route page on a2bflight.com, where the seller shows today's price. **Tools** - `find_airports`: turn a city name into IATA codes, or list airports near a point - `cheapest_routes`: the cheapest fares from an origin (or into a destination), filtered by max price and month - `route_fares`: one airport pair by date and month, one-way and round trip - `where_to_meet`: where 2 to 8 people from different cities can meet cheapest — a weekend, each person's fare, the total, and a link to the group's page with everyone filled in - `meet_link`: the group's page for a place they already picked, on a weekend with fares for everyone No auth, no key. Try: "Cheapest flights from Bangkok next month" · "What does New York to Lisbon cost in November?" · "I'm in New York and my friend is in London — where can we meet cheapest?"

MCP readiness

B · 87/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here C+, 70.0/100), which weighs availability, conformance, p95 speed and descriptor. How the two differ

Valid MCP handshake	10/10	initialize and tools/list both answered.
Live MCP endpoint	24/25	Endpoint answers the MCP initialize handshake (3286 ms); slow response -1.
Protocol revision	8/10	Speaks MCP 2025-11-25, 1 revision(s) behind 2026-07-28.
Signed descriptor	n/a	No MCP standard defines a signed server descriptor.
Uptime (30 days)	15/15	30/30 probes succeeded over 30 days (100%).
Tool declaration	10/10	Lists 5 tool(s) with descriptions.
Verified identity	5/10	Publisher declared (repository, package or homepage); claim this listing to verify domain control.
Freshness + modern flags	4/5	seen in a source within 7 days.
Auth declaration	2/5	Declares credential scheme: smithery_api_key.

Applicable criteria total 90 points, scaled to 100.

Responsiveness: Slow (3286 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).

Measured 2026-11-11.

Nine criteria, the same as the A2A readiness score, read from our daily MCP probe (initialize + tools/list) and 30-day probe history. No MCP standard defines a signed server descriptor, so that criterion is n/a and the other 90 points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. Display only: search order uses the quality grade.

Compared with peers

Against 53,039 reachable MCP servers in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness: Higher than 88% of peers; This listing 87 · peer median 81
Latency: Faster than 42% of peers; This listing 391 ms · peer median 326 ms

Where it loses the most points, and how to win them back

Verified identity −5 — Claim the listing and prove control of its domain.
Now: Publisher declared (repository, package or homepage); claim this listing to verify domain control.
Auth declaration −3 — State how to authenticate (an auth scheme, or that none is needed).
Now: Declares credential scheme: smithery_api_key.
Protocol revision −2 — Support the current protocol revision.
Now: Speaks MCP 2025-11-25, 1 revision(s) behind 2026-07-28.

How many agent tools actually work · All statistics

Listed in

Directories this entry was found in.

smithery since 2026-10-03 ↗

How to connect

MCP endpoint (streamable-http)

https://server.smithery.ai/a2bflight/fares/mcp

JSON-RPC initialize probe

curl -X POST https://server.smithery.ai/a2bflight/fares/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}'

Homepage

https://a2bflight.com/ai

Listed at (smithery)

https://a2bflight.com/ai