Reference documentation for the Invapi Invoice JSON schema — all fields, types, required fields, enums, and nested objects.
Reference for the Invapi Invoice JSON schema used across all API endpoints.
See the full schema documentation at ${CLAUDE_PLUGIN_ROOT}/skills/invoice-schema/references/schema.md.
| Field | Type | Description |
|---|---|---|
invoice_number | string | Unique invoice identification |
invoice_date | string | Issue date (YYYY-MM-DD) |
invoice_currency_code | string | ISO 4217 currency code |
invoice_type | string | "incoming" or "outgoing" |
seller |
| object |
| Seller party details |
buyer | object | Buyer party details |
payment_information | object | Payment terms and method |
totals | object | Invoice totals and amounts |
items | array | Line items (min 1) |
invoice_description | string | Short description of the invoice |
| Field | Type | Description |
|---|---|---|
invoice_note | string | Free-text note |
additional_data | object | Extra data (reverse charge, Leitweg-ID, order/project refs) |
delivery_information | object | Delivery address and details |
category | string | Invoice category (from extraction) |
id | string | Internal ID |
{
"invoice_number": "INV-2025-001",
"invoice_date": "2025-01-15",
"invoice_currency_code": "EUR",
"invoice_type": "outgoing",
"invoice_description": "Consulting services January 2025",
"seller": {
"name": "Seller GmbH",
"postal_address": {
"address_line_1": "Hauptstr. 1",
"city": "Berlin",
"post_code": "10115",
"country_code": "DE"
},
"vat_identifier": "DE123456789",
"contact": {
"email_address": "[email protected]"
}
},
"buyer": {
"name": "Buyer AG",
"postal_address": {
"address_line_1": "Bahnhofstr. 10",
"city": "Munich",
"post_code": "80331",
"country_code": "DE"
},
"contact": {
"email_address": "[email protected]"
}
},
"payment_information": {
"payment_type": "credit_transfer",
"payment_due_date": "2025-02-15"
},
"totals": {
"total_amount_without_vat": 1000.00,
"total_amount_with_vat": 1190.00,
"total_vat_amount": 190.00,
"amount_due_for_payment": 1190.00,
"paid_amount": 0
},
"items": [
{
"item_identifier": "1",
"item_quantity": 10,
"item_quantity_unit_of_measure_code": "HUR",
"item_total_amount_with_vat": 1190.00,
"item_total_amount_without_vat": 1000.00,
"price_details": {
"item_price_without_vat": 100.00,
"item_price_with_vat": 119.00,
"item_vat_percentage": 19,
"vat_category_code": "S"
},
"item_information": "Consulting services"
}
]
}
invoice_type field describes the direction from the user's perspective: "incoming" = received from a supplier, "outgoing" = sent to a customer.YYYY-MM-DD format.S (standard), Z (zero-rated), E (exempt), AE (reverse charge), K (intra-community), G (export), O (outside scope), L (Canary Islands), M (Ceuta/Melilla).