# 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 with 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 %}