Self-Refreshing GHL API Pipeline: OAuth Token Rotation → Live SMS Campaign Updates

Problem:

GoHighLevel's expiring OAuth tokens silently broke the client's API automations, so SMS campaigns that needed live conversation data and custom values stopped updating without anyone noticing.

Solution:

Built a 9-module Make.com scenario that owns the full token lifecycle inline: a webhook trigger fires a Data Store lookup for the stored refresh token, POSTs to GHL's /oauth/token endpoint to mint a fresh agency token, writes the new refresh token back to the Data Store, then POSTs to /oauth/location-token for a location-scoped access token. With valid credentials guaranteed, the scenario GETs /conversations/search to pull the latest SMS, retrieves custom values via API, iterates the array, and PUTs the updated content into the live SMS campaign.

Result:

SMS campaigns now update with live conversation and custom-value data on every run, with zero manual token re-authentication and no silent credential failures.