Invoice Processing: Email to PostgreSQL Database with GPT-4o & Discord Alerts β€” n8n Workflow

Hoog complexiteit▢️ Handmatig23 knooppunten🏷️ Invoice Processingdoor Halfbit πŸš€

Overzicht

AI-Powered Invoice Processing: from Email to Database & Chat Notifications

Automatically process PDF invoices directly from your email inbox. This workflow uses AI to extract key data, saves it to a PostgreSQL database, and instantly notifies you about the new document in your preferred chat application.

The workflow listens for new emails, fetches PDF attachments, and then passes their content to a Large Language Model (LLM) for intelligent recognition and data extraction. Finally, the inform

Gebruikte knooppunten

PostgresDiscordCodeBasic LLM ChainOpenAI Chat ModelStructured Output Parser

Workflow-voorvertoning

πŸ“₯ Email Trigger (IMAP)
This node listens for new emails in your inbox and fetc
Setup Instructions:
- Go to Credentials and create new IMAP credentials
- Fill in: IM
πŸ€– AI Data Extraction (Basic LLM Chain)
This node sends the text from the PDF to an AI model (e
Setup Instructions:
- Provide a clear prompt des
πŸ”‘ OpenAI API (LLM Provider)
This node connects to OpenAI (or another AI provider) a
Setup Instructions:
- Log in to [OpenAI](https://platform.openai
πŸ“€ Chat Notification (Discord Webhook)
This node sends a summary of the extracted invoice to y
Setup Instructions:
- In Discord:
Go to Server Settings β†’ Integrations β†’
❗ Don't forget to set your PostgreSQL credent
In every PostgreSQL-related node, you must manually sel
Instructions:
- Click on the node
- Go
πŸ”€ Merge Node
This node merges metadata from the email (e.g., subject
Setup Instructions:
- Input 1 β†’ AI output
- Input 2 β†’ Email data
- Se
πŸ—ƒοΈ PostgreSQL Insert
This node writes the extracted data into the `company`
Setup Instructions:
- Ensure your database has the correct schem
modelparser
E
Email Trigger (IMAP)
Discord
Basic LLM Chain
OpenAI Chat Model
Structured Output Parser
Code
E
Extract from File1
I
If
M
Merge
I
If1
I
If2
P
Prepare Company Data
Check Company
I
IF Company Does Not Exist
Add Company
S
Set Existing Company ID
S
Set New Company ID
M
Merge Company ID
Check Invoice
I
IF Invoice Does Not Exist
Add Invoice
I
Invoice Exists
M
Merge End
23 nodes25 edges

Hoe het werkt

  1. 1

    Trigger

    De workflow start met een handmatig-trigger.

  2. 2

    Verwerking

    Gegevens stromen door 23 knooppunten, connecting chainllm, code, discord.

  3. 3

    Uitvoer

    De workflow voltooit zijn automatisering en levert het resultaat aan de geconfigureerde bestemming.

Knooppuntdetails (23)

PO

Postgres

postgres

#1
DI

Discord

discord

#2
CO

Code

code

#3
BA

Basic LLM Chain

n8n-nodes-langchain.chainLlm

#4
OP

OpenAI Chat Model

n8n-nodes-langchain.lmChatOpenAi

#5
ST

Structured Output Parser

n8n-nodes-langchain.outputParserStructured

#6

Hoe deze workflow te importeren

  1. 1Klik op de knop JSON downloaden rechts om het workflowbestand op te slaan.
  2. 2Open uw n8n-instantie. Ga naar Workflows β†’ Nieuw β†’ Importeren uit bestand.
  3. 3Selecteer het gedownloade bestand invoice-processing-email-to-postgresql-database-with-gpt-4o-discord-alerts en klik op Importeren.
  4. 4Stel inloggegevens in voor elk serviceknooppunt (API-sleutels, OAuth, enz.).
  5. 5Klik op Workflow testen om te controleren of alles werkt, activeer het vervolgens.

Of plak rechtstreeks in n8n β†’ Importeren uit JSON:

{ "name": "Invoice Processing: Email to PostgreSQL Database with GPT-4o & Discord Alerts", "nodes": [...], ...}

Integraties

chainllmcodediscordemailreadimapextractfromfileiflmchatopenaimergeoutputparserstructuredpostgresset

Haal deze workflow op

Download en importeer met één klik

JSON downloadenBekijken op n8n.io
Knooppunten23
Complexiteithigh
Triggermanual

Gemaakt door

Halfbit πŸš€

Halfbit πŸš€

@halfbit

Tags

chainllmcodediscordemailreadimapextractfromfileiflmchatopenaimergeoutputparserstructuredpostgres
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Automate Custom QuickBooks Invoice PDFs & Email with n8n

Standard accounting templates often fail to reflect a premium brand identity. This sophisticated n8n workflow bridges the gap between financial record-keeping and professional client presentation. By moving beyond the native limitations of QuickBooks Online, this automation enables businesses to generate high-end, multi-page PDF invoices that align perfectly with their corporate styling. The process begins the moment a new invoice is generated in QuickBooks, triggering a webhook that captures real-time billing data. The workflow then utilizes advanced HTML-to-File conversion and custom Code nodes to structure data into a polished, branded layout. It handles complex logic such as line-item merging and multi-page formatting automatically. Once the document is rendered, the system bypasses generic 'no-reply' senders by routing the finalized PDF through your preferred email provider. This ensures a seamless, white-labeled experience for your clients while eliminating the manual overhead of exporting, styling, and attaching files. Ideal for agencies and service providers, this flow guarantees that your most frequent touchpointβ€”the billβ€”is as professional as your work. **Common Use Cases:** - High-end creative agencies requiring bespoke, white-labeled billing documents for premium clients. - Automated recurring subscription billing where custom tax disclosures or localized branding are required. - Service-based businesses needing to attach dynamic project reports or terms of service directly to QuickBooks invoices.

πŸ”— WebhookΒ·12 nodes