GoHighLevel API V2 + n8n field mapping

Fix the GoHighLevel API V2 custom-field handoff before more records disappear.

Automation workbench with workflow nodes, CRM records, inbox items, and spreadsheet rows

For teams sending contacts, opportunities, conversations, or external ERP IDs into GoHighLevel through n8n and seeing 401, 422, missing-field, or silent dashboard mismatch failures.

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Operating plan

Rescue the path before adding more branches.

Step 1

Reproduce the failing write

Capture one contact or opportunity payload, the GHL endpoint, the response body, and the dashboard state that should have changed.

Step 2

Map fields to stable IDs

Separate display labels from custom field IDs, location IDs, external keys, and optional fields so n8n sends only values GHL will accept.

Step 3

Add a safe replay path

Leave a run log, dedupe key, and manual replay note so a failed batch can be retried without creating duplicate contacts.

Ready to start

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