Latenode
Webhook
JavaScript
ChatGPT
Mailgun

Scenario for sending an email to a travel agency client who has just booked a tour

This template receives a booking on a webhook, asks ChatGPT for a sightseeing email from the traveler's name, age, origin city, and destination city, then sends that message with Mailgun. Connect Mailgun and put the Mailgun API key on that connection. ChatGPT is a Latenode AI step, so you do not paste an OpenAI key.

Updated Sep 16, 2026Est. run: 15sEst. cost: $0.0009
How Latenode estimates time and cost

Latenode bills workflow runtime in CPU seconds. The first 10,000 CPU seconds are free each month, then usage follows pay-as-you-go CPU-second pricing. Plug-and-Play (PnP) AI nodes are billed separately—each PnP token is $1 USD, charged pay-as-you-go at vendor cost plus a small processing fee, with no API keys required.

Full pricing — how CPU seconds work →

Workflow preview

What this template does

  • Writes a sightseeing email from the booking details
  • Sends through Mailgun to the traveler
  • Uses ChatGPT as a Latenode AI step
  • Keeps the Mailgun API key on the Mailgun connection

How it works

1
Trigger

Receive the booking

A webhook starts the scenario when your booking tool posts the traveler record.

2
Logic

Build the briefing

JavaScript reads name, age, origin city, and destination city into a ChatGPT prompt.

3
AI

Write the sightseeing email

ChatGPT returns the subject and body. ChatGPT is Latenode AI, so you do not paste an OpenAI key.

4
Action

Send with Mailgun

Mailgun delivers the email to the traveler. Put the Mailgun API key on the Mailgun connection.

Setup guide

1

Add the webhook

Add a webhook trigger and copy its URL. Send JSON with name, age, origin city, destination city, and the traveler email.

2

Connect Mailgun

Add a Mailgun connection and paste your Mailgun API key there. Choose the sending domain.

3

Wire ChatGPT and send

In JavaScript, build the prompt from the booking fields. Ask ChatGPT for subject and body, then send with Mailgun to the traveler email. ChatGPT is a Latenode AI step. Post a test booking and confirm the email arrives.

Requirements

A webhook caller that posts the booking payload
A Mailgun domain and API key stored on the Mailgun connection
ChatGPT available as a Latenode AI step

FAQ

Common questions about this template

Each run uses credits on your Latenode plan. We charge for processing time (1 credit = 30 seconds). Your actual cost depends on your plan and how long the run takes. See pricing plans for plans and how credits work. Plug-and-Play AI nodes are billed separately.
Contact support →

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