A comprehensive AI agent skill for automated invoice generation, client management, and accounts receivable tracking.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install afrexai-invoice-engine
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 afrexai-invoice-engine 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 Engine (afrexai-invoice-engine)?
The Invoice Engine is a zero-dependency agent skill designed for end-to-end financial management, from initial quote to final payment. As a part of the ecosystem of Openclaw Skills, it allows AI agents to handle complex billing workflows without needing external third-party software. It maintains a local Client Registry and an Invoice Ledger to ensure all financial data remains within your controlled workspace.
This tool is built for professional developers and businesses that need to manage professional invoices with precision. It supports sophisticated features like tax handling decision trees, multi-currency support (including Bitcoin/Lightning), and automated overdue management. By integrating this into your Openclaw Skills setup, you gain a high-performance accounts receivable department that runs entirely through your AI agent.
Invoice Engine (afrexai-invoice-engine) Use Cases
- Automating monthly retainer billing for consulting or service-based businesses.
- Generating professional tax-compliant invoices for international and domestic clients.
- Managing the transition from proforma quotes to finalized invoices upon customer acceptance.
- Tracking payment collections and automatically flagging overdue accounts for follow-up.
- Running comprehensive financial health reports including DSO and revenue concentration analysis.
How Invoice Engine (afrexai-invoice-engine) Works
- The agent checks the Client Registry for existing data or performs a structured onboarding checklist for new clients.
- Invoices are generated using a standardized sequential numbering system and a professional template including line items and payment methods.
- The skill tracks the invoice lifecycle through statuses like Draft, Sent, Overdue, and Paid in a centralized YAML ledger.
- Recurring billing routines run on a schedule to generate and optionally auto-send invoices for retainers.
- An automated reminder schedule triggers friendly or firm notifications based on the number of days past the due date.
- Financial reporting tools aggregate ledger data into revenue summaries, aging reports, and collection metrics.
Invoice Engine (afrexai-invoice-engine) Setup
To start using the Invoice Engine with your Openclaw Skills, you need to initialize the data storage files in your local workspace. Run the following commands to set up the environment:
# Initialize the data storage files
touch clients.yaml invoices.yaml
Once the files are created, define your company details, tax identification, and preferred payment methods within the client configuration to enable the automated builder.
Invoice Engine (afrexai-invoice-engine) Data Schema & Taxonomy
The skill manages data across several key YAML structures to maintain a clean audit trail:
| Component | File/Key | Description |
|---|---|---|
| Client Profile | clients.yaml |
Stores contact info, tax IDs, and payment terms. |
| Invoice Ledger | invoices.yaml |
Tracks individual invoice status, amounts, and payments. |
| Recurring Config | recurring |
Defines frequencies (monthly/weekly) for automated billing. |
| Payment Log | payments |
Records transaction references and payment methods used. |
| Multi-Currency | currencies |
Manages exchange rates and primary reporting currency logic. |
Invoice Engine (afrexai-invoice-engine) Advanced Features
- Smart Tax Handling: Logic for EU reverse charge, US nexus rules, and international export tax exemptions.
- Automated Late Fee Engine: Calculates simple interest charges on overdue balances based on custom grace periods.
- Quote-to-Invoice Pipeline: Seamlessly converts proforma quotes into tax invoices upon client approval.
- Credit Note Management: Professional handling of refunds and adjustments to ensure ledger accuracy.
- Multi-Format Exports: Ability to generate CSV for spreadsheets, JSON for APIs, or Markdown tables for quick review in Openclaw Skills.
SKILL.md
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