> For the complete documentation index, see [llms.txt](https://docs.goaffpro.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.goaffpro.com/how-tos/manual-integration/custom-sdk-integration/sdk-settings/rest-json.md).

# REST JSON

**GoAffPro** provides you with the option to allow the app to call functions on your API.

To call functions on your API, go to the **SDK Settings** section in the **Settings** tab of the GoAffPro admin panel.

<figure><img src="/files/cNVJCjIOKnS5YFJJWMWx" alt=""><figcaption><p>Settings > SDK Settings</p></figcaption></figure>

Here, go to the REST JSON section.

<figure><img src="/files/XaOUZCKhPeOn7uCOWfyY" alt=""><figcaption><p>REST JSON</p></figcaption></figure>

Now, click on **Edit JSON Spec**.

<figure><img src="/files/n1yg1h30i5Un5W6zMOKm" alt=""><figcaption><p>Click on Edit JSON Spec</p></figcaption></figure>

You can edit the REST JSON Spec to call functions of your API.

<figure><img src="/files/sVrK9GG5lNdIi5s4BTO7" alt=""><figcaption></figcaption></figure>