AI Invoice Generator — Agent Skill

Generate professional invoices from project details via the AI Pass API.

Quick Start

import requests, os
from datetime import datetime, timedelta

AIPASS_API_KEY = os.environ["AIPASS_API_KEY"]

def generate_invoice(from_name, to_name, line_items, currency="USD", terms="NET 14"):
    """
    Generate a professional invoice.
    
    line_items: list of {"desc": str, "qty": float, "rate": float}
    """
    today = datetime.now().strftime("%Y-%m-%d")
    due = (datetime.now() + timedelta(days=14)).strftime("%Y-%m-%d")
    total = sum(i["qty"] * i["rate"] for i in line_items)
    items = "\n".join([f"- {i['desc']}: {i['qty']} x {i['rate']:.2f} = {i['qty']*i['rate']:.2f} {currency}" for i in line_items])
    
    r = requests.post(
        "https://aipass.one/apikey/v1/chat/completions",
        headers={"Authorization": f"Bearer {AIPASS_API_KEY}", "Content-Type": "application/json"},
        json={
            "model": "gpt-5-mini", "temperature": 1, "max_tokens": 2000,
            "messages": [{"role": "user", "content": f"Professional invoice. FROM: {from_name}. TO: {to_name}. DATE: {today}, DUE: {due}, TERMS: {terms}.\n\nITEMS:\n{items}\nTOTAL: {total:.2f} {currency}\n\nFormat complete ready-to-send invoice."}]
        },
        timeout=60
    )
    return r.json()["choices"][0]["message"]["content"]

# Example
invoice = generate_invoice(
    "Jane Smith Design", "Acme Corp",
    [{"desc": "Brand strategy consulting", "qty": 3, "rate": 150}, {"desc": "Logo design", "qty": 1, "rate": 500}]
)
print(invoice)

Setup

1. Sign up at aipass.one (valid email required)
2. Developer Dashboard → API Keys
3. export AIPASS_API_KEY=your_key_here

Web App

aipass.one/apps/invoice-gen

Related: AI Email Writer for payment follow-up emails