Heads up: HighLevel has stopped issuing new API keys.
HighLevel ended support for its older API (v1), which this InboxGeek integration uses, on December 31, 2025, and no longer lets accounts create new API keys. If your HighLevel account already has an API key, you can connect it with the steps below. Existing connections keep working while your key stays active. If you cannot find an API key, or something stops working, email [email protected] for help. An updated HighLevel connection is in progress.
Before you begin
- You need a HighLevel API key that already exists. HighLevel no longer lets accounts create new API keys. If your account already has one, follow the steps below. If you cannot find one, contact [email protected] before you start.
- Which key to use: Location (sub-account) keys are available on HighLevel plans; agency keys require HighLevel’s Advanced API tier (HighLevel currently calls it the Founder Plan). Use the key that matches how your HighLevel account is set up.
- What InboxGeek can access: a HighLevel API key gives access to the whole account; HighLevel does not let you limit it. InboxGeek only uses your contacts and tags.
- No email stats from HighLevel: HighLevel does not send workflow stats to InboxGeek, so LiveOpens cannot show opens or clicks for your HighLevel emails. Check results in HighLevel.
Login to your InboxGeek account.
Click on LiveOpens → Integrations.
Click the Add New button for a new integration.
InboxGeek will store all previous platform account identification for quick integration creation. If the account for your new integration is not already stored, click Create new Platform.
From the drop-down menu, select HighLevel.
Find your HighLevel API key (log in to HighLevel in a new tab):
- Sub-account (location) key: open the sub-account, go to Settings → Business Profile. The API Key is in the General Information section.
- Agency key: in agency settings, open API Keys (the page is titled Agency API Keys). Screenshots below show an older Agency API Keys path; the location of the key in HighLevel may look slightly different.
If the key is marked Expired, refresh (rotate) it in HighLevel first. HighLevel marks keys Expired after 90 days without use. Then paste the current key into InboxGeek.
Copy your API Key. Treat it like a password: do not email it or post it in a support ticket.
In InboxGeek, enter the copied API Key into the API key/Token field.
Click Create Platform. InboxGeek will check the API key. If there are no issues, HighLevel is added to your list of integrated platforms. If the check fails, email [email protected].
Click Next to move forward to the next tab, List.
Already connected? Nothing changes for you while your key keeps working. HighLevel says existing keys keep working for now but are no longer supported. If HighLevel emails you that a key is expiring, or InboxGeek stops receiving events, refresh the key in HighLevel and update it in InboxGeek under API Key / Token Settings (see Managing Your LiveOpens Integration).
Also known as: GoHighLevel, GHL, LeadConnector.
Need help? See HighLevel Troubleshooting for missing or expired keys, connection problems, tags, missing events, and stats.