curl https://invoice.horizonpay.co/api/v1/invoice-items/ii_Da4Vq9Ns2Kx7Bm3Yt8Rc1Lp6 \
  -H "Authorization: Bearer $INVOICE_AI_API_KEY"

import InvoiceAI from '@horizonpay/invoice-ai'

const invoiceai = new InvoiceAI() // reads INVOICE_AI_API_KEY

const item = await invoiceai.invoiceItems.retrieve('ii_Da4Vq9Ns2Kx7Bm3Yt8Rc1Lp6')
console.log(item.description, item.amount)

from invoice_ai import InvoiceAI

client = InvoiceAI()  # reads INVOICE_AI_API_KEY

item = client.invoice_items.retrieve("ii_Da4Vq9Ns2Kx7Bm3Yt8Rc1Lp6")
print(item.description, item.amount)

{
  "data": {
    "id": "ii_Da4Vq9Ns2Kx7Bm3Yt8Rc1Lp6",
    "object": "invoiceitem",
    "price": "price_Jc5Tn8Wq1Ze6Ra3Ym9Ub2Gs7",
    "product": "prod_Hy7Rq2Lm9Xc4Vb8Nt3Kd6Pw1",
    "description": "Consulting retainer",
    "quantity": 1,
    "unit": "NOS",
    "unit_amount": 2500000,
    "amount": 2500000,
    "discount_percent": 0,
    "tax_rate": 0,
    "tax_amount": 0
  }
}

{
  "type": "https://invoice.horizonpay.co/problems/unauthorized",
  "title": "Unauthorized",
  "status": 401,
  "detail": "Send your API key as `Authorization: Bearer inv_live_…`.",
  "instance": "req_7f3c9a1e2b4d4e8a9c6f2d1b0a3e5f71",
  "code": "unauthorized"
}

{
  "type": "https://invoice.horizonpay.co/problems/forbidden",
  "title": "Insufficient scope",
  "status": 403,
  "detail": "This credential is missing the invoices:write scope.",
  "instance": "req_7f3c9a1e2b4d4e8a9c6f2d1b0a3e5f71",
  "code": "forbidden"
}

{
  "type": "https://invoice.horizonpay.co/problems/not-found",
  "title": "Not found",
  "status": 404,
  "detail": "Invoice item not found.",
  "instance": "req_7f3c9a1e2b4d4e8a9c6f2d1b0a3e5f71",
  "code": "not_found"
}

{
  "type": "https://invoice.horizonpay.co/problems/rate-limited",
  "title": "Too many requests",
  "status": 429,
  "detail": "Rate limit of 120 per 60s exceeded.",
  "instance": "req_7f3c9a1e2b4d4e8a9c6f2d1b0a3e5f71",
  "code": "rate_limited"
}