A comprehensive billing tool for generating, sending, and tracking professional invoices with automated tax calculations and sequential numbering.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install invoice
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install invoice using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Invoice Skill?
The Invoice skill is a robust solution within the Openclaw Skills collection designed for freelancers and businesses to streamline their outbound billing cycle. It manages the entire lifecycle of an invoice, from initial draft creation to final PDF generation and payment tracking, ensuring that all legal and professional standards are met.
Unlike simple expense trackers that handle incoming receipts, this skill focuses specifically on the creation of billing documents. It features built-in logic for correlative numbering and transparent tax reporting, providing a structured environment for managing client data and business configurations. This makes it an essential tool for maintaining accurate financial records and ensuring tax compliance across different jurisdictions.
Invoice Skill Use Cases
- Generating professional B2B invoices with full tax compliance and company details.
- Automating sequential invoice numbering across different series to prevent gaps.
- Calculating complex tax rates, including base amounts and totals, for every transaction.
- Tracking the status of sent invoices to manage cash flow and payment reminders.
- Creating credit notes and simplified invoices for various business scenarios.
How Invoice Skill Works
- Discovery phase where client information, services rendered, and amounts are identified.
- Draft generation where the skill calculates taxes and assigns the next sequential number.
- Review process to preview the invoice details and perform necessary edits.
- Finalization step where the invoice is locked and a PDF is generated.
- Optional sending phase to deliver the invoice via email to the client.
- Payment tracking to monitor the status of the invoice until completion.
Invoice Skill Setup
To get started with this skill in the Openclaw Skills framework, you need to configure your business identity. First, initialize the configuration by providing your business name, tax ID, and bank details. You can set your default tax rates and invoice series format (e.g., F-2026-). Ensure your directory structure is ready:
mkdir -p ~/billing/{drafts,sent,clients}
touch ~/billing/config.json ~/billing/series.json
Edit the config.json to include your IBAN and preferred email settings for automated delivery.
Invoice Skill Data Schema & Taxonomy
The skill organizes data within the ~/billing/ directory using a clear taxonomy:
| Directory/File | Description |
|---|---|
~/billing/drafts/ |
Contains work-in-progress invoices organized by client name. |
~/billing/sent/ |
Finalized PDF invoices organized by year (e.g., 2026). |
~/billing/clients/index.json |
A database of client tax IDs, addresses, and contact info. |
config.json |
Stores user business data, payment details, and templates. |
series.json |
Tracks the last used invoice number per series to ensure correlation. |
Invoice Skill Advanced Features
- Multi-series numbering support for different business branches or billing years.
- Automated PDF generation with customizable professional templates.
- Support for credit notes and simplified invoices to handle corrections and retail sales.
- Integration with client databases for instant retrieval of tax information.
- Built-in legal compliance checks for mandatory B2B invoice fields.
SKILL.md
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