n8n Twilio SMS Google Review Request Workflow (Webhook)

Get more Google reviews automatically—without bothering customers at the wrong time

This n8n workflow listens for a “job done” webhook, waits the delay you configure (respecting quiet hours), then sends the customer a Google review request via Twilio SMS. It also prevents repeat requests by checking your recent Twilio message history.

What this workflow does

• Receives a POST webhook containing the customer’s phone number, name, and job details.
• Validates input and settings, then calculates a scheduled send time based on your delay and quiet hours.
• Responds immediately to the webhook with the scheduled send time (or an error reason).
• If required details are missing (e.g., invalid phone number or missing review link), texts the owner via Twilio explaining why the request won’t start.
• Waits until the scheduled time.
• Looks up recent outbound messages from your Twilio number to that customer within the repeat window.
• If an earlier text already included your review link (failed sends don’t count), skips sending and notifies the owner that it was skipped.
• If no prior ask is found, sends the review request SMS through Twilio.
• If Twilio refuses the message, the owner receives Twilio’s refusal reason; if it sends successfully, the owner is notified unless owner updates are turned off.

Use cases

• Service businesses that want an SMS “thanks + Google review” right after a job is completed.
• Automation engineers using n8n to trigger Twilio SMS campaigns from system events (“job done”).
• SaaS operators who need controlled outreach with quiet hours and repeat-request protection.

Technical details

• n8n Webhook (POST) entry point for job completion events
• Twilio for SMS sending and message history lookups
• Nodes used: if, set, code, wait, twilio, webhook
• Requires configuring Twilio Account SID/Auth Token, “From” Twilio phone number, and owner “To” cell number