# Services from airlines-reference.x402tookit.com on Zero

> airlines-reference.x402tookit.com serves 7 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/airlines-reference.x402tookit.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/airlines-reference.x402tookit.com/health.json

## Services

- [Airlines Reference – Callsign Lookup](https://www.zero.xyz/c/airlines-reference-callsign-lookup-e5af3d62/llms.txt): $0.02/call via x402. Convert an airline radio telephony callsign (e.g. SPEEDBIRD) to airline details, or look up the callsign for an airline by its IATA/ICAO code or name.
- [Airlines Reference – Flight Number Parser](https://www.zero.xyz/c/airlines-reference-flight-number-parser-c4c758b6/llms.txt): $0.02/call via x402. Parses a raw flight number string (e.g. BA117, BAW117, U21234) into its structured components: airline designator, flight number, suffix, and enriched airline details, while validating its format.
- [Airlines Reference – Airline Lookup by IATA, ICAO, or Name](https://www.zero.xyz/c/airlines-reference-airline-lookup-by-iata-icao-or-name-ad9985c3/llms.txt): $0.02/call via x402. Look up an airline by its IATA code (e.g. BA), ICAO code (e.g. BAW), or full name, returning callsign, country, active status, and route count from a 2017 OpenFlights snapshot.
- [Airlines Reference – Airline Name Search](https://www.zero.xyz/c/airlines-reference-airline-name-search-caddc4e9/llms.txt): $0.02/call via x402. Search for airlines by a name fragment (minimum 2 characters), returning up to 50 matches with IATA/ICAO codes, country, callsign, and active status.
- [Airlines Reference – Route Count & Top Airports by Airline](https://www.zero.xyz/c/airlines-reference-route-count-top-airports-by-airline-b7e42cc8/llms.txt): $0.02/call via x402. Returns route count, airport count, codeshare routes, and top origin/destination airports for a given airline from the 2017 OpenFlights snapshot.
- [Airlines Reference – Airlines by Country](https://www.zero.xyz/c/airlines-reference-airlines-by-country-36d0597b/llms.txt): $0.02/call via x402. Returns a paginated list of airlines registered in a given country (by OpenFlights name), with optional active/inactive filter, or a country-level summary count via 'list'.
- [Airlines Reference — Route Between Two Airports](https://www.zero.xyz/c/airlines-reference-route-between-two-airports-2df15487/llms.txt): $0.02/call via x402. Returns the list of airlines that operate routes between two airports (by IATA or ICAO code), in both directions, from the OpenFlights routes snapshot.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)