# Auth: Trackers

Trackers store your watchlists, ratings, and watch history. CrossWatch (CW) syncs between trackers and media servers using pairs.

{% tabs %}
{% tab title="End users" %}
{% hint style="info" %}
Connect a tracker in **Settings → Authentication** before creating pairs.
{% endhint %}

### Available trackers

* [Auth: AniList](/crosswatch/providers/authentication/auth-trackers/auth-anilist.md)
* [Auth: MDBList](/crosswatch/providers/authentication/auth-trackers/auth-mdblist.md)
* [Auth: SIMKL](/crosswatch/providers/authentication/auth-trackers/auth-simkl.md)
* [Auth: Trakt](/crosswatch/providers/authentication/auth-trackers/auth-trakt.md)
* [Auth: TMDb](/crosswatch/providers/authentication/auth-trackers/auth-tmdb.md)

### Tips

* Start with **one tracker** as your “source of truth”.
* Add [Metadata](/crosswatch/providers/metadata.md) for better matching.
* Use [Adapter: CrossWatch](/crosswatch/providers/synchronization/adapter-crosswatch.md) for local snapshots before risky changes.
  {% endtab %}

{% tab title="Power users" %}

### Choosing a tracker

* Trakt / SIMKL / MDBList are best for movies + TV.
* AniList is anime-first and won’t match everything cleanly cross-provider.

### Rate limits

Trackers are more likely to rate limit than local media servers.

If you see 429s:

* sync less often
* reduce batch size
* add write delays (pair/provider settings)
  {% endtab %}
  {% endtabs %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://wiki.crosswatch.app/crosswatch/providers/authentication/auth-trackers.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.