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Quickstart

Get up and running with the Invoica SDK in under 5 minutes.

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1. Install the SDK

npm install @invoica/sdk

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2. Get Your API Key

Sign up at app.invoica.ai and generate an API key from the API Keys section. Your key will start with inv_.

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3. Initialize the Client

import { InvoicaClient } from '@invoica/sdk';

const client = new InvoicaClient({
  apiKey: 'inv_your_api_key_here',
  baseUrl: 'https://api.invoica.ai',
});

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4. Create Your First Invoice

const invoice = await client.invoices.create({
  amount: 1000,        // Amount in cents ($10.00)
  currency: 'USD',
  description: 'AI Agent API Usage - February 2026',
  buyer: {
    companyName: 'Acme AI Corp',
    email: 'billing@acme-ai.com',
    address: '123 Agent Street, San Francisco, CA 94105',
  },
  seller: {
    name: 'My AI Platform',
    address: '456 Tech Blvd, Austin, TX 78701',
    wallet: '0x1234...abcd',
  },
});

console.log(`Invoice created: ${invoice.id}`);
console.log(`Status: ${invoice.status}`);
console.log(`Total: $${(invoice.total / 100).toFixed(2)}`);

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5. Check Invoice Status

const status = await client.invoices.get(invoice.id);
console.log(`Invoice ${status.invoiceNumber}: ${status.status}`);

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Using cURL

You can also interact with the API directly: 
curl -X POST https://api.invoica.ai/api/invoices \
  -H "Authorization: Bearer inv_your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "amount": 1000,
    "currency": "USD",
    "description": "AI Agent API Usage",
    "buyer": {
      "companyName": "Acme AI Corp",
      "email": "billing@acme-ai.com"
    },
    "seller": {
      "name": "My AI Platform",
      "wallet": "0x1234...abcd"
    }
  }'

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Next Steps

Authentication

Learn about API key management and request signing.

Webhooks

Get real-time notifications when invoice events occur.

Tax Compliance

Set up automatic tax calculation for your invoices.

API Reference

Explore all available endpoints.