New in Weld: Authenticate Facebook Ads with System User Tokens
If you’re managing ads across multiple accounts using Meta Business Manager, this update is for you. You can now connect Facebook Ads to Weld using secure System User access tokens, instead of relying on personal OAuth accounts.
This new option simplifies agency authentication, boosts stability, and avoids shared login credentials.
What’s changed?
In the Facebook Ads connector settings, under Authentication Method, you’ll now see two options:
- OAuth (Most users)
- System User (Agency)
By selecting System User (Agency), you can paste in a System User access token created via Meta Business Manager for a more scalable and secure setup.
When to use System User tokens
Use this authentication method when:
- You manage multiple ad accounts across clients
- You want to avoid personal login-based OAuth
- You prefer stable connections that don't break when team members leave
- You operate across several business entities under one parent account
🔐 How to set it up
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Open Meta Business Manager:
Go to Business Settings → Users → System Users. Create or select a system user with the appropriate role.
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Assign access:
Grant the system user admin or advertiser-level access to relevant ad accounts and the Facebook app .
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Generate a token:
Within the System User settings, click "Generate New Token", choose your app, and select required scopes (usually ads_read / ads_management).
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In Weld:
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Add data source
Go to the Sources tab in Weld and click Add data source.
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Choose Facebook Ads
Select Facebook Ads from the list of available connectors.
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Name your connection
Enter a clear name to help identify the connection later (e.g. "facebook_ads_agency_client1").
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Select Authentication Method
Choose System User (Agency).
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Paste your access token
Add the System User access token you generated in Facebook Business Manager.
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Save and sync
Once configured, save your setup and Weld will begin syncing data as usual.
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What happens next?
Your Facebook Ads data syncs as usual, no further changes needed in your workflows.
This method supports everything from batch analysis to reverse ETL use cases, and it avoids disruptions linked to OAuth token expiry or user account changes.
Learn more
For full instructions on creating and managing System User tokens, visit Meta’s official documentation:
👉 System Users for Facebook API clients
To explore the updated connector, visit Weld’s connector page:
