# StableTravel Airline Check-in Links

> StableTravel Airline Check-in Links is a paid API for AI agents from StableTravel at stabletravel.dev, paid per call via x402 or MPP, $0.0054/call, status unknown (last checked 2026-10-10).

Returns the online check-in page URLs for a given airline by its IATA code, optionally localized to a language

## Facts

- Endpoint: GET https://stabletravel.dev/api/flights/checkin-links?utm_source=zero.xyz
- Price: $0.0054/call
- Payment: x402, MPP
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Provider: StableTravel
- Docs: https://stabletravel.dev
- Website: https://stabletravel.dev
- Tags: amadeus, flightaware, flights, hotels, activities, transfers, travel, data, web
- Canonical page: https://www.zero.xyz/c/stabletravel-checkin-links-1fdb2b80
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4QmJpUWlqHWb2t-3HNvyK

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

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability stabletravel-checkin-links-1fdb2b80
```

Example prompt: What's the online check-in page link for American Airlines (AA)? I'd like it in English (en-US).

## When to prefer this

Use this endpoint when you need to direct a traveler to their airline's online check-in page and have the airline's IATA code available. Ideal for travel assistant agents that want to surface check-in links without scraping airline websites directly. Prefer this over web search when you need a clean, structured link response that can be localized.

## Known failure modes

- Invalid or unrecognized airline IATA code returns empty data or error
- Airline does not offer online check-in — returns empty array
- Language code not supported — may fall back to default language or return warning
- Rate limit or payment failure returns 402 or 429 status
- Missing required airlineCode parameter returns 400 validation error

## How this service works

Get airline check-in page URLs

## Output

An array of check-in link objects for the specified airline, each containing the URL to the airline's online check-in page, potentially localized based on the language parameter. May include metadata and warnings if certain links are unavailable or partially resolved.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stabletravel-checkin-links-1fdb2b80/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stabletravel.dev](https://www.zero.xyz/host/stabletravel.dev/llms.txt)