n8n Workflow: CrossBorderHK HKG→Shenzhen Fare Estimate via API + Resend Email

Get HKG→Shenzhen fare estimates automatically—then email a fixed trip summary and log everything

This n8n workflow collects an internal HKG-to-Shenzhen transfer request via an authenticated n8n Form, calls the CrossBorderHK transfer-estimates API for a starting-fare reference (or manual-review outcome), and sends a structured trip summary through Resend—while recording submission and delivery status in an n8n Data Table.

What this workflow does

• Receives staff submissions from an n8n Form secured with Basic Auth.
• Normalizes form fields into a consistent payload and generates a unique submission ID.
• Tracks every request by upserting the submission into an n8n Data Table.
• Calls the CrossBorderHK estimate API using an authenticated HTTP Request, capturing the response even if the API returns an error.
• Classifies the result as:
  • a starting-fare reference,
  • a manual-review requirement, or
  • an API error.
• Builds an HTML email summary containing the relevant amount or reasons based on the API response.
• Sends the email via the Resend API to a fixed internal recipient, then writes the provider message ID and delivery status back to the Data Table (or marks delivery as unknown when ambiguous).

Use cases

• Automation for internal teams estimating CrossBorderHK HKG→Shenzhen transfer fares from staff-submitted trip details.
• Operations workflows that need manual-review triggers when the API cannot provide a clear estimate.
• Audit-ready tracking of submission and email delivery status in a centralized n8n Data Table.

Technical details

• Nodes / components: Form Trigger, Basic Auth, Code, Switch, HTTP Request, Data Table, Sticky Note.
• Integrations: CrossBorderHK estimate API (HTTP Header Auth) and Resend (HTTP Header Auth).
• Logging: upsert submission records and update with Resend message ID + delivery status.