GoHighLevel phone and email validation

Why validate inside GoHighLevel

Keep the original contact ID, enrich that contact in your automation layer, and write the result back before branching. This avoids creating duplicates or accidentally treating a failed API call as a valid mobile.

The reliable pattern is HighLevel event > Make or n8n > LookupLab > update the HighLevel contact. A native webhook response is not assumed to update custom contact fields automatically.

Setup

1. Create text fields for LookupLab line type, carrier and check status. Add a checked-at date field if needed.
2. Send the contact ID and E.164 phone from a HighLevel workflow webhook to your existing Make or n8n automation. Secure the receiving webhook and validate its payload.
3. Call LookupLab with your API key and the number query parameter. Retain the source contact ID separately from the lookup response.
4. Update that same contact through your HighLevel integration using data.line_type and data.carrier. Write a checked status only after a completed lookup.
5. Trigger the next workflow from the completed status. Mobile records still need your existing consent and opt-out checks. Unknown, VoIP and API failures should have explicit review handling.

Walk through the complete workflow.
See the setup, sample output and review rules →

Phone validation is not consent, ownership verification or guaranteed delivery. Email syntax and MX checks establish domain-level signals, not proof that a particular mailbox exists.

What teams build with it

• Give agency staff a visible line-type field.
• Review imports before enrolling contacts in messaging.
• Keep failed checks out of automatic follow-up workflows.

Related: HubSpotSalesforcePipedrive