The Salesforce Administrator at the org can enable API access in Salesforce for all users.
Note: Your Salesforce Administrator controls your Profile and Permission Sets.
How to enable API access in Salesforce by Profile
- Click Setup
- Click Manage Users -> Profiles.
3. Click Edit against the specific Profile.
4. Scroll down to Administrative Permissions and check the API Enabled box.
5. Click Save.
How to enable API Access in Salesforce by Permission Set
1. Click Setup.
2. Click Manage Users > Permission Sets.
3. Select the specific Permission Set.
4. Click System > System Permissions > Edit
5. Check the API Enabled box.
6. Click Save.
Note: If API is not enabled to your org, you will not be able to see the API Option under the Administrative Permissions List.