# itunes.lookup_album_tracks

**stable** **Advanced**

Tracks of an iTunes album (first row is the album itself).

`GET /v1/itunes/lookup_album_tracks`

## What you get

A list of Itunes results in Onekey's unified shape, in `data` (an array). An empty array is a normal, successful answer and is charged like any other; a source that reports "nothing found" as an error returns a free `404 not_found` instead.

## What it costs

- **Advanced · 5 credits** for a fresh fetch, charged only when it succeeds.
- **Free when served from cache (0.2 credit for a cached response over 100 KB).**
- **Free** if the request is invalid (never charged) or the source fails or reports not found (refunded).

## Parameters

| Name | Type | Required | Default | What it is | Constraints |
| --- | --- | --- | --- | --- | --- |
| `id` | string | yes | (required) | iTunes/Apple id | max 12 chars; must match `[0-9]{1,12}`; trimmed |
| `country` | string | no | `us` | 2-letter store country, e.g. us | max 2 chars; must match `[a-z]{2}`; trimmed, lowercased |

## Request

```bash
curl "https://api.onekey.dev/v1/itunes/lookup_album_tracks?id=1097861387" \
  -H "x-api-key: YOUR_API_KEY"
```

```python
import requests

res = requests.get(
    "https://api.onekey.dev/v1/itunes/lookup_album_tracks",
    params={"id": "1097861387"},
    headers={"x-api-key": "YOUR_API_KEY"},
)
body = res.json()

if body["success"]:
    print(body["data"])
else:
    print(body["error"]["code"], body["error"]["message"])
```

```javascript
const params = new URLSearchParams({ id: "1097861387" });
const res = await fetch(`https://api.onekey.dev/v1/itunes/lookup_album_tracks?${params}`, {
  headers: { "x-api-key": "YOUR_API_KEY" },
});
const body = await res.json();

if (body.success) console.log(body.data);
else console.error(body.error.code, body.error.message);
```

## Recorded response

A real Itunes response, recorded and returned in Onekey's shape. Fields the platform does not provide are `null`.

```json
{
  "success": true,
  "data": [
    {
      "content": {
        "id": null,
        "title": null,
        "category": "Alternative",
        "url": null,
        "createdAt": "1997-05-21T07:00:00Z"
      },
      "author": {
        "displayName": "Radiohead"
      },
      "ext": {
        "album": "OK Computer",
        "durationMs": null
      },
      "media": {
        "thumbnailUrl": "https://is1-ssl.mzstatic.com/image/thumb/Music116/v4/07/60/ba/0760ba0f-148c-b18f-d0ff-169ee96f3af5/634904078164.png/100x100bb.jpg",
        "previewUrl": null
      }
    },
    {
      "content": {
        "id": "1097861769",
        "title": "Airbag",
        "category": "Alternative",
        "url": "https://music.apple.com/us/album/airbag/1097861387?i=1097861769&uo=4",
        "createdAt": "1997-05-21T07:00:00Z"
      },
      "author": {
        "displayName": "Radiohead"
      },
      "ext": {
        "album": "OK Computer",
        "durationMs": 287880
      },
      "media": {
        "thumbnailUrl": "https://is1-ssl.mzstatic.com/image/thumb/Music116/v4/07/60/ba/0760ba0f-148c-b18f-d0ff-169ee96f3af5/634904078164.png/100x100bb.jpg",
        "previewUrl": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview221/v4/f1/ed/05/f1ed0562-876c-a84a-c4ff-70613135b818/mzaf_18061085714629562351.plus.aac.p.m4a"
      }
    }
  ],
  "metadata": {
    "platform": "itunes",
    "endpoint": "lookup_album_tracks",
    "cached": false,
    "stale": false,
    "age_s": 0,
    "fetched_at": "2026-01-01T12:00:00+00:00",
    "credits_charged": 5,
    "request_id": "7f3a9c2e5b1d4c8fa2e6d0b9c4f18e37"
  },
  "error": null
}
```

## Field mapping

How this endpoint's source fields become Onekey's [unified schema](https://onekey.dev/docs/schema.md). Fields the source lacks come back as `null`.

| Source path | Onekey field | Transform |
| --- | --- | --- |
| `trackId` | `content.id` | `toString` |
| `trackName` | `content.title` | - |
| `artistName` | `author.displayName` | - |
| `collectionName` | `ext.album` | - |
| `primaryGenreName` | `content.category` | - |
| `trackViewUrl` | `content.url` | `safeUrl` |
| `artworkUrl100` | `media.thumbnailUrl` | `safeUrl` |
| `previewUrl` | `media.previewUrl` | `safeUrl` |
| `trackTimeMillis` | `ext.durationMs` | `toNumber` |
| `releaseDate` | `content.createdAt` | `toIsoDate` |

## Caching and freshness

- Fresh for about 1 hour. Repeat calls in that window are served from cache and are free.
- Between 1 hour and 1 day the cached copy is still served instantly and marked `stale: true` while Onekey refreshes it in the background.
- If the source is down when a refresh is needed, the last copy can be served for up to 3 days more (marked stale).
- A "not found" is remembered for 5 minutes and is free.
- The cache is shared across all customers, which is what keeps repeat calls cheap.

## What can go wrong

| Status | Code | What to do |
| --- | --- | --- |
| 401 | `unauthorized` | Check the `x-api-key` header. |
| 402 | `insufficient_credits` | [Add credits](https://onekey.dev/pricing); your balance must cover the price. |
| 404 | `not_found` | Unknown endpoint path. |
| 422 | `invalid_params` | Fix the parameters using the table above. Free. |
| 429 | `rate_limited` | Wait `Retry-After` seconds, then retry. |
| 502 | `upstream_error` | The source failed. Refunded; retry with backoff. |

See [Errors](https://onekey.dev/docs/errors.md) for the full list and retry guidance.

Status: stable (verified against the live source).