N26 → Notion Transactions Auto-Labelled with Groq (n8n)

Auto-label your N26 transactions in Notion—using Groq and n8n

This n8n workflow syncs your N26 transactions into a Notion database and automatically classifies each transaction with Groq (LangChain Text Classifier)—so your finances stay organized without manual tagging.

What this workflow does

• Connect & authorize N26 (one-time): You generate an Enable Banking consent link for N26, approve access in your N26 app, and Enable Banking redirects back to the workflow’s webhook callback.
• Create and store connection state: The workflow uses a signed JWT to request a read-only N26 authorization URL, then exchanges the one-time code for an Enable Banking session. It saves the enabled account/session identifiers to an n8n Data Table.
• Automated refresh on schedule: On a weekly run (or webhook-triggered run), it loads the saved N26 account details, generates a fresh read-only JWT, and pulls the last 90 days of transactions.
• Deduplicate & classify: Transactions are split into individual items and deduplicated across executions using the transaction ID. New transactions are classified into your Notion categories using the Groq chat model.
• Create Notion records: It creates a Notion database page per new transaction, mapping transaction fields and applying the signed amount.

Use cases

• SaaS operators who want a clean, searchable transaction history inside Notion.
• Automation engineers building a repeatable n8n finance pipeline with deduplication and scheduled syncing.
• Teams that rely on consistent expense categories and want Groq-based auto-labeling.

Technical details

• Enable Banking for N26 transaction sync and consent/session handling
• JWT authentication (signed JWT for read-only requests)
• n8n Data Table to persist account/session identifiers for future scheduled runs
• Nodes/logic: if, jwt, set, webhook, split out, and notion
• Groq (LangChain Text Classifier) for transaction-to-category classification