> For the complete documentation index, see [llms.txt](https://docs.stacksync.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stacksync.com/connectors/salesforce/authorize-salesforce/enable-api-access-in-salesforce.md).
# Enable API Access in Salesforce
API access needs to be enabled in Salesforce for the user connecting Stacksync to its Salesforce instance.
Follow the steps below to:
* Enable API access in Salesforce by Profile
* Enable API access in Salesforce by Permission Set
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{% tab title="Enable API access by Profile" %}
**Enable API access in Salesforce by Profile**
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1\. Click the Gear icon and click **Setup.**
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2\. Type **profiles** into the Quick Find box and select **Profiles.**\
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3\. Click **Edit** against the Profile you wish to enable API access for.
4\. Scroll down to **Administrative Permissions** and check the **API Enabled** box and click **Save**.
The API in Salesforce is now enabled for the modified profile. All users with this profile now have API enabled permissions.
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***Optional:*** If your sync includes the ContentDocumentLink object (used for Salesforce Files / attachments), also enable the Query All Files permission in the same permission set. This only works for custom profiles, salesforce standard profiles do not allow you to turn enable this permission.\
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5\. In your custom profile scroll down to *Administrative Permissions* section and enable *Query all data*
{% endtab %}
{% tab title="Enable API access by Permission Set" %}
#### Enable API Access in Salesforce by Permission Set
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1\. Click the Gear icon and click **Setup.**
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2\. Type **permission** into the Quick Find box and select **Permission Sets.**
3\. Select the Permission Set you wish to enable API access for. (Or click "NEW" if you want to create a new one).
4\. Scroll down to **System** and click **System Permissions.**
5\. Click **Edit**
6\. Check the **API Enabled** box and then scroll up and click **Save.**
The permission set now has the API Enabled permission. The permission set should be applied to the user connecting Salesforce to Stacksync.
7. Select the permission set and click **Manage Assignments** and then **Add Assignments**.
8. Select the check boxes next the names of the users you want assigned to the permission set, and click **Assign**.
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*Optional:* If your sync includes the ContentDocumentLink object (used for Salesforce Files / attachments), also enable the Query All Files permission in the same permission set.
8\. Switch the permission set overview to *App Permissions*
9. Click **Edit**
10. Scroll down to the *Content* section and enable *Query All FIles* and then scroll up and click **Save.**
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{% endtabs %}
Learn more in [this Salesforce documentation](https://help.salesforce.com/s/articleView?id=sf.branded_apps_commun_api_permset.htm\&type=5).
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