If you’ve ever stared at a blank screen wondering why your GoHighLevel data won’t talk to n8n, you’re not alone. This is one of the most searched, least clearly explained setups in the agency automation world, and we’re going to fix that right now.
In this guide, we walk you through the complete process of connecting GoHighLevel to n8n using OAuth 2.0, GoHighLevel’s API v2 authentication method. By the time you finish reading, you’ll have a working, authenticated connection between your GoHighLevel sub account and your n8n workspace, ready to power any workflow you want to build.
And while we’re using n8n as the example throughout, the exact same process applies to virtually any OAuth 2.0 compatible app you want to connect to GoHighLevel. So bookmark this, because you’ll come back to it.
Whether you’re an agency owner looking to automate client onboarding, a developer testing backend integrations, or someone building AI-powered workflows from scratch, this guide has everything you need.
Why OAuth 2.0 Is the Right Way to Connect GoHighLevel
Before we get into the steps, it’s worth understanding why OAuth 2.0 matters and why you should be using it over older API key methods.
OAuth 2.0 is the modern, secure authorization standard used by GoHighLevel’s API v2. Unlike static API keys that give blanket access and never expire, OAuth 2.0 generates access tokens that are scoped, meaning you choose exactly what permissions the connection has. This is not just good security practice, it’s increasingly becoming the only supported method for reliable integrations with GoHighLevel’s growing platform.
For agencies managing multiple client sub accounts, OAuth 2.0 also gives you far more granular control. You can build a private app once, apply it across sub accounts, and maintain clean, auditable API access without ever handing over master credentials.
What You'll Need Before You Start
Getting this right from the beginning saves you a lot of backtracking. Here’s what to have ready:
An active GoHighLevel account with agency-level access
Access to the GoHighLevel Marketplace (marketplace.gohighlevel.com)
An n8n workspace (self-hosted or n8n cloud)
A notepad or password manager to store your Client ID and Client Secret safely
A simple image editor or tool to create placeholder images (you’ll need a 1×1 icon and a 640×360 preview image for the app listing)
Step 1: Create Your Private App in the GoHighLevel Marketplace
Head over to marketplace.gohighlevel.com. If you don’t have a login, create one now. Once you’re in, navigate to the “My Apps” section and select “Create App.”
Give your app a name. We recommend naming it something descriptive and relevant to what you’re connecting, for example “n8n OAuth 2.0” followed by your agency name. This makes it easy to identify later, especially when managing multiple integrations.
When configuring the app, make these selections:
App Type: Private (because this is for internal use only, not the public marketplace)
Sub Account Level: Yes, this is what allows the app to operate within individual client sub accounts
Who Can Install: Everyone (for your own agency accounts)
Listing Type: White Label
Hit “Create App” and move on to the next section.
Step 2: Fill in the Required App Details
GoHighLevel requires several fields to be completed before your app can be published. Every section marked with a red star is mandatory. Don’t skip these, the platform will not let you proceed without them.
Work through each section in order:
App Profile: Add a name, tagline, and description. The content here is largely for GoHighLevel’s internal review process since this is a private app, so keep it simple and functional.
Images: You’ll need a square icon image and at least one 640×360 preview image. If you don’t have branded assets ready, simply create a coloured square in any basic image editor. Set a background fill colour and save. The platform will accept these as placeholders while your app is in development.
Support Details: Add your agency support email address. Include your international dialling code if adding a phone number. You’ll also want to add links to your privacy policy and terms and conditions pages if you have them. Even if these aren’t strictly required for a private app, it’s good practice.
Pricing: Set this to Free.
Hit “Save” after each section to avoid losing progress.
Step 3: Generate Your Client ID and Client Secret
Navigate to the “Secrets” section inside your app configuration. This is where you generate the credentials that n8n will use to authenticate.
Click “Add a Client Secret” and give it a name (we use “n8n OAuth” for clarity). Once created, you will be shown your Client Secret. This is the only time you will see it in full. Copy it immediately and store it somewhere secure, a password manager, an encrypted notepad, or a private document only you can access.
Then copy your Client ID from the same screen.
Do not share either of these credentials with anyone. These are the keys to your GoHighLevel data.
Open your n8n workspace now. Go to “Credentials,” click “Create Credential,” and search for “HighLevel.” Make sure you select the OAuth API option, not the standard API key option. Paste in your Client ID and Client Secret into the appropriate fields.
Step 4: Add the OAuth Redirect URL
Still inside n8n, copy the OAuth Redirect URL that n8n generates for your new credential. You’ll find this inside the HighLevel credential setup screen.
Head back to your GoHighLevel app, navigate to “Advanced Settings,” and paste the redirect URL into the redirect URI field. GoHighLevel includes a localhost URL by default, you can leave that in place and add your n8n redirect URL alongside it.
This redirect URL tells GoHighLevel where to send the user after they complete the authorization flow. Without it, authentication will fail.
Step 5: Configure Your API Scopes
This is the step most tutorials either skip entirely or get wrong, and it’s one of the most important parts of the whole process.
Scopes define exactly what your n8n connection is allowed to do inside GoHighLevel. You don’t want to enable everything, especially in a production environment with client data. You want to be deliberate.
Here are the core scopes we recommend selecting for a standard agency automation workflow:
Calendars: Select all (essential for appointment booking workflows)
Conversations: Required for any messaging or chat-based automations
Custom Fields: Essential for reading and writing custom data fields on contacts
Opportunities: Needed for pipeline management and deal tracking
Locations: Required if you’re working across multiple sub accounts
Workflows: Include these if your automation triggers or interacts with GHL workflow actions
Users: Useful for account-level operations
Emails: Add these if your workflow sends or reads email data
Skip scopes you don’t actively need. Blogs, courses, knowledge base, surveys, and payment scopes are unlikely to be relevant for most automation workflows and adding unnecessary scopes increases your security surface area.
Once you’ve made your selections, hit “Save.” You should see a count of your selected scopes confirmed on screen.
Step 6: Publish Your App and Connect Your Sub Account
With all sections completed and your scopes saved, navigate to “Versions” inside your app and hit “Publish.” GoHighLevel will run a quick check. If anything is still missing, it will flag it here. Complete any outstanding items and publish again.
Once live, go back to “My Apps” and you’ll see your new private app listed. To connect a sub account, open the app and assign it to the sub account you want to integrate with n8n. Name the connection after the sub account for easy identification.
Click “Connect My Account.” A GoHighLevel authentication popup will appear. Press “Login,” select the correct sub account (the one you’re integrating), and confirm the permissions the app is requesting. The platform will tell you the app is requesting access to sensitive information and ask you to confirm you trust it. Since this is your own app, proceed.
Once authorized, return to n8n. Your credential should now show as “Connected.”
That’s it. Your GoHighLevel sub account is now authenticated and live inside n8n.
How to Update or Edit Your App After Publishing
One thing the GoHighLevel Marketplace doesn’t make obvious is how to edit a published app. You cannot edit the live version directly. Instead, go to “Manage Versions” and select “Clone as Draft.” This creates a working copy you can edit freely. Make your changes, save, and republish when ready.
This is useful if you need to add new scopes later as your workflows grow in complexity. Just remember that after republishing, connected accounts may need to re-authorize the app if you’ve added new scopes.
The Scopes Strategy: Only Grant What You Need
One insight most tutorials miss is the importance of scope hygiene, particularly for agencies managing client data. Here’s a practical principle: before you add a scope, ask yourself what specific workflow action requires it.
For example, if you’re building a lead nurturing workflow that books calendar appointments and updates custom fields on contacts, you need Calendars, Custom Fields, and potentially Conversations. You do not need Payments, Products, or Invoices. Keeping your scope list lean makes your integration easier to audit, easier to troubleshoot, and far more secure.
As your agency grows and you build more complex automations, revisit your scope list through the “Clone as Draft” method and add only what new workflows actually require.
Connecting Multiple Sub Accounts
If you’re running an agency with multiple client sub accounts, the good news is that you only need to create this private app once. The same app can be authorized by multiple sub accounts. Each sub account connection generates its own set of access tokens, kept completely separate from one another.
In n8n, you’ll create a separate credential for each sub account, each going through the same OAuth authentication flow. Name them clearly (e.g., “Client A, GoHighLevel OAuth” and “Client B, GoHighLevel OAuth”) so your workflow editor stays clean and organized.
For a deeper dive into how to build powerful automation workflows inside GoHighLevel itself, take a look at our guide to Go High Level Workflows (https://flexxable.com/the-ultimate-guide-to-go-high-level-workflows-%F0%9F%A7%A0/) which covers the workflow builder interface, triggers, and actions in detail.
Building AI-Powered Workflows Once You're Connected
Once your OAuth connection is live, the real fun begins. The GoHighLevel and n8n integration unlocks a huge range of automation possibilities, including:
AI-powered lead qualification: Use n8n to route new leads through an AI agent that qualifies them based on custom field data before booking a calendar appointment inside GoHighLevel
Automated CRM syncing: Push contact data, pipeline updates, and conversation records between GoHighLevel and external tools in real time
Conversational AI follow-ups: Trigger n8n workflows from GoHighLevel conversation events and feed them into AI models for intelligent, context-aware responses
Custom reporting pipelines: Pull GoHighLevel opportunity and contact data into spreadsheets, dashboards, or databases automatically
This is exactly the kind of infrastructure that powers an AI automation agency. If you’re at the stage where you want to turn these skills into a real business and offer these services to clients, The Instant AI Agency is a resource worth exploring. It’s built to help you package and sell AI automation services without having to figure everything out from scratch.
For those building conversational AI agents specifically, our blog post on building a no-code conversational AI agent in n8n and GoHighLevel to qualify leads and book calls walks through a complete end-to-end build.
Common Issues and How to Fix Them
OAuth redirect URL mismatch: If authentication fails after login, double-check that the redirect URL in your GoHighLevel app’s Advanced Settings exactly matches the one generated in n8n. Even a single trailing slash difference will break it.
Missing scopes error: If a workflow action fails with a permissions error after connecting, it usually means a required scope wasn’t selected. Clone your app as a draft, add the missing scope, republish, and re-authorize the sub account.
App not appearing after publish: GoHighLevel sometimes takes a few minutes to propagate app updates. Wait two to three minutes and refresh the My Apps screen.
Client Secret lost: If you didn’t save your Client Secret when it was generated, you cannot retrieve it. Go back to the Secrets section, delete the old secret, and generate a new one. Update your n8n credential with the new values.
Who This Integration Is Built For
This setup is relevant across a wide range of use cases:
Marketing agencies automating client onboarding, CRM syncs, and follow-up sequences
Automation specialists building custom, multi-step integrations that go beyond GoHighLevel’s native workflow capabilities
Business owners who want full control over their GoHighLevel data and how it connects to third-party tools
Developers and AI builders testing backend API connections for custom software or AI agent infrastructure
If you’re ready to go deeper on automation and connect with others doing the same, join our free community, the AI Automation Agency Ninjas (https://www.skool.com/ai-automation-agency/). It’s a growing network of agency operators, developers, and automation builders sharing strategies, solving integration problems, and helping each other build better systems.
Conclusion
Connecting GoHighLevel to n8n via OAuth 2.0 is one of those setups that feels intimidating the first time but becomes second nature once you’ve done it. The key steps are creating a well-configured private app in the GoHighLevel Marketplace, generating and storing your credentials securely, selecting the right scopes for your specific use case, and authenticating the connection inside n8n.
Once it’s live, you’ve unlocked a powerful, scalable integration layer that can power virtually any automation you can imagine, from AI lead qualification to fully automated CRM pipelines. And if you want to take that further and build an agency around these skills, The Instant AI Agency (https://link.flexxable.com/sellaiservices) gives you a clear path to doing exactly that.
Have you already tried connecting GoHighLevel to n8n or another third-party tool via OAuth 2.0? What workflow are you planning to build first?
