Handle KSeF e-invoice exceptions with webhooks, Gmail and Data Tables

by Kuliberda Labs ✓ · 11 views · created 2026-08-25 · Invoice Processing

What this workflow does

This workflow has 49 nodes and runs when an HTTP POST request hits its webhook URL (plus 2 other triggers). Along the way it connects Gmail.

How it runs

Trigger: When an HTTP POST request hits its webhook URL (plus 2 other triggers).

1. Validate Intake Token (Code): runs custom JavaScript code
2. Route Manual Sweep (Switch): routes items into branches
3. Get Durable Recovery Lifecycle Rows (Data table): get (row)
4. Intake Authorized? (If): checks a condition and branches into true / false
5. Get Durable Entry Lifecycle Guard (Data table): get (row)
6. Build Intake Persist Fixtures (Code): runs custom JavaScript code
7. Run Durable Recovery Sweep (Code): runs custom JavaScript code
8. Build Webhook KSeF Fixture (Code): runs custom JavaScript code
9. Build Unauthorized Response (Code): runs custom JavaScript code
10. Plan Durable Entry Guard (Code): runs custom JavaScript code

…plus 36 more steps. See the full node list below.

Services it uses

Gmail

Before you upgrade to n8n 3.0

Nodes used (9)

• Webhookn8n-nodes-base.webhook
• Manual Triggern8n-nodes-base.manualTrigger
• Switchn8n-nodes-base.switch
• Coden8n-nodes-base.code
• Ifn8n-nodes-base.if
• Respond to Webhookn8n-nodes-base.respondToWebhook
• Data tablen8n-nodes-base.dataTable
• Schedule Triggern8n-nodes-base.scheduleTrigger
• Gmailn8n-nodes-base.gmail

From the author

Quick overview Persist KSeF invoice intake, simulate submission outcomes, query status before retrying, and route unresolved cases through Data Tables and Gmail. How it works 1. Receives explicit invoice data through a token-protected webhook or the built-in…

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