> For the complete documentation index, see [llms.txt](https://dev.ishare.eu/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.ishare.eu/version-2.1/introduction/specific-technical-standards/caching.md).

# Caching

Caching is a way to boost performance efficiency. Often data is temporarily stored on a different medium, to enable faster access to the data.

For every API that is compliant to iSHARE caching MUST Be made explicit to the API consumer.

If a response is not cacheable it MUST contain the following headers:

Copy

```
Cache-Control: no-store
Pragma: no-cache
```

If a response is cacheable it MUST contain the following headers:

Copy

```
Cache-Control: max-age=31536000
```

{% hint style="info" %}
**Note**

max-age MAY vary
{% endhint %}