# Amadeus Airline Check-In Links

> Amadeus Airline Check-In Links is a paid API for AI agents from stabletravel.dev, paid per call via x402, $0.0054/call, status unknown (last checked 2026-09-15).

Returns the official check-in page URL(s) for a given airline by its IATA code, optionally in a specified language.

## Facts

- Endpoint: GET https://stabletravel.dev/api/flights/checkin-links
- Price: $0.0054/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/amadeus-4da151a0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ymXYjk0fYgx6lxglAnLLo

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 amadeus-4da151a0
```

Example prompt: Can you get me the online check-in link for American Airlines (IATA code AA) in English so I can check in for my flight?

## When to prefer this

Use this endpoint when an agent needs to direct a traveler to the correct online check-in page for a specific airline. Ideal for pre-flight automation workflows where the agent knows the carrier's IATA code and needs to surface the exact check-in URL rather than searching the web.

## Known failure modes

- Invalid or unknown IATA airline code returns empty data or error
- Missing required airlineCode parameter causes validation error
- Unsupported language code may fall back to default or return a warning
- Airline does not have an online check-in page resulting in empty data array
- Payment failure (x402) if USDC balance is insufficient

## How this service works

Pay-per-request access to flights, award availability, hotels, activities, and transfers. No auth, no subscriptions.

## Output

An array of check-in link objects containing the official airline check-in page URL(s) for the requested carrier, plus any metadata warnings if applicable.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "language": "en-US",
   "airlineCode": "UA"
  }
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "airlineCode"
     ],
     "properties": {
      "language": {
       "type": "string",
       "description": "Language code (e.g. en-US)"
      },
      "airlineCode": {
       "type": "string",
       "description": "Airline IATA code (e.g. AA)"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "data"
     ],
     "properties": {
      "data": {
       "type": "array",
       "items": {}
      },
      "meta": {},
      "warnings": {
       "type": "array",
       "items": {}
      }
     },
     "additionalProperties": false
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": [
   {
    "id": "AA-en-US",
    "href": "https://www.aa.com/checkin",
    "type": "checkin-link",
    "channel": "Web"
   }
  ],
  "meta": {
   "count": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/amadeus-4da151a0/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)