n8n-nodes-work4all

This is an n8n community node package that integrates work4all — the all-in-one ERP and CRM system — into your n8n workflows.

Features

• Create Incoming Invoices — post incoming invoices to work4all via GraphQL, with support for:
  • Form-field mode (fill each field individually)
  • JSON mode (pass a single JSON object — ideal for LLM output)
  • File attachments (PDFs, XMLs, ZIPs) via binary data from upstream nodes
• Customers — create, update, and retrieve customers (single or paginated list)
• Projects — retrieve projects (single or paginated list)
• Multi-tenant (Mandant) support — pick the target work4all tenant per node; the tenant list is loaded directly from your instance

Multi-tenant (Mandant) support

work4all instances can host multiple tenants (Mandanten). Every node has a Mandant field at the top that controls which tenant the request targets — the value is sent on each API call via the x-work4all-mandant HTTP header.

• Default is 1.
• The dropdown is populated dynamically: when you open it, the node loads the tenants your credential has access to (via POST /api/Mandant/query) and shows their names, while storing the numeric tenant code internally. If the credential has no tenants assigned, it falls back to tenant 1.
• You can also switch the field to expression mode to set the tenant code from data (e.g. ={{ $json.mandant }}).

The Mandant is applied consistently to all operations, including the file upload step of Create Incoming Invoice.

Authentication

This node uses OAuth2 Client Credentials to authenticate against the work4all API.

You will need:

Field	Description
API URL	Base URL of your work4all instance, e.g. https://api.work4all.de
Access Token URL	OAuth2 token endpoint, e.g. https://auth.work4all.de/connect/token
Client ID	Your OAuth2 client ID
Client Secret	Your OAuth2 client secret

Contact your work4all administrator to obtain client credentials with the required permissions.

Development

Dev Container (recommended)

This repo includes a Dev Container configuration under .devcontainer/.

1. Install the Dev Containers extension in VS Code or Cursor.
2. Dev Containers: Reopen in Container from the command palette.
3. After the container builds, run:

npm run dev          # local n8n with this node — http://localhost:5678
npm test             # integration tests (requires .env.test)
npm run build:watch  # rebuild on TypeScript changes

Copy .env.test.example to .env.test inside the container for integration tests against a real work4all tenant. The workspace folder is mounted into the container, so your local .env.test is available after you create it on the host.

Local (without container)

This package requires Node.js 22 (the @n8n/node-cli build/dev tooling relies on Node 22+). A .nvmrc is included, so you can run:

nvm use      # selects Node 22 from .nvmrc
npm ci
npm run build
npm run dev

Installation

In n8n (recommended)

1. Go to Settings → Community Nodes
2. Click Install a community node
3. Enter n8n-nodes-work4all
4. Click Install

Manual (self-hosted)

npm install n8n-nodes-work4all

Then restart your n8n instance.

Operations

Create Incoming Invoice

Creates a complete incoming invoice in work4all including line items and optional file attachments.

Supplier lookup — you can identify the supplier by (in priority order):

• Supplier Code (internal work4all ID)
• Supplier Name
• Customer Number at Supplier
• Supplier Contact Email
• Supplier IBAN

Invoice items — enter manually via form fields or provide a JSON array.

Attachments — attach files from binary properties of upstream nodes (e.g. HTTP Request, Gmail, Read Binary File). Supports form mode or JSON array mode for dynamic/LLM-driven attachment selection.

Customers

• Get Customer — retrieve a single customer by its internal code.
• Get Many Customers — retrieve a paginated list, with an optional JSON filter.
• Create Customer / Update Customer — create or update a customer record.

Projects

• Get Project — retrieve a single project by its internal code.
• Get Many Projects — retrieve a paginated list, with an optional JSON filter.

Pagination note: the Page field is zero-based — the first page is 0.

All list and read operations support an Output mode (Simplified, Raw, or Selected Fields) to control how much of the response is returned.

Example Workflows

The workflows/createIncomingInvoice/ directory contains ready-to-import workflows:

File	Description
w4a-invoice-gmail.json	Polls a Gmail inbox for invoice emails, extracts attachments, and creates incoming invoices in work4all
w4a-invoice-exchange.json	Polls a Microsoft Exchange/Outlook inbox for invoice emails and creates incoming invoices in work4all

To import: open n8n → Workflows → Import from file.

Resources

• work4all website
• work4all API documentation
• n8n community nodes documentation

License

MIT