curl --request POST \
  --url https://test-api.pasca.co/api/v1/einvoice/sign \
  --header 'API-KEY: <api-key>' \
  --header 'API-SECRET: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "business_id": "{{BUSINESS_ID}}",
  "irn": "{{IRN}}",
  "issue_date": "2024-05-14",
  "invoice_type_code": "396",
  "document_currency_code": "NGN",
  "tax_currency_code": "NGN",
  "invoice_kind": "B2B",
  "invoice_delivery_period": {
    "start_date": "2024-06-14",
    "end_date": "2024-06-16"
  },
  "order_reference": "order REF IRN?",
  "billing_reference": [
    {
      "irn": "ITW001-E9E0C0D3-20240619",
      "issue_date": "2024-05-14"
    },
    {
      "irn": "ITW001-E9E0C0D3-20240619",
      "issue_date": "2024-05-14"
    }
  ],
  "dispatch_document_reference": {
    "irn": "ITW001-E9E0C0D3-20240619",
    "issue_date": "2024-05-14"
  },
  "receipt_document_reference": {
    "irn": "ITW001-E9E0C0D3-20240619",
    "issue_date": "2024-05-14"
  },
  "originator_document_reference": {
    "irn": "ITW001-E9E0C0D3-20240619",
    "issue_date": "2024-05-14"
  },
  "contract_document_reference": {
    "irn": "ITW001-E9E0C0D3-20240619",
    "issue_date": "2024-05-14"
  },
  "accounting_customer_party": {
    "party_name": "Test Accounting Customer Party",
    "tin": "83526544-2627",
    "email": "test_sender@pasca.co",
    "telephone": "+23480254099000",
    "business_description": "Sample business description",
    "postal_address": {
      "street_name": "32, owonikoko street",
      "city_name": "Gwarikpa",
      "postal_zone": "023401",
      "lga": "NG-AB-ANO",
      "state": "NG-AB",
      "country": "NG"
    }
  },
  "accounting_supplier_party": {
    "party_name": "Dangote Group",
    "tin": "33824622-7135",
    "email": "tobi@pasca.co",
    "telephone": "+2348168527167",
    "business_description": "This is the test supplier details",
    "postal_address": {
      "street_name": "32, owonikoko street",
      "city_name": "Gwarikpa",
      "postal_zone": "023401",
      "lga": "NG-AB-ANO",
      "state": "NG-AB",
      "country": "NG"
    }
  },
  "actual_delivery_date": "2024-05-14",
  "payment_means": [
    {
      "payment_means_code": "10",
      "payment_due_date": "2024-05-14"
    },
    {
      "payment_means_code": "43",
      "payment_due_date": "2024-05-14"
    }
  ],
  "payment_terms_note": "dummy payment terms note (will be encryted in storage)",
  "allowance_charge": [
    {
      "charge_indicator": true,
      "amount": 800.6
    },
    {
      "charge_indicator": false,
      "amount": 10
    }
  ],
  "tax_total": [
    {
      "tax_amount": 56.07,
      "tax_subtotal": [
        {
          "taxable_amount": 800,
          "tax_amount": 8,
          "tax_category": {
            "id": "LOCAL_SALES_TAX",
            "percent": 2.3
          }
        }
      ]
    }
  ],
  "legal_monetary_total": {
    "line_extension_amount": 340.5,
    "tax_exclusive_amount": 400,
    "tax_inclusive_amount": 430,
    "payable_amount": 1500000
  },
  "invoice_line": [
    {
      "hsn_code": "CC-001",
      "product_category": "Food and Beverages",
      "discount_rate": 2.01,
      "discount_amount": 3500,
      "fee_rate": 1.01,
      "fee_amount": 50,
      "invoiced_quantity": 15,
      "line_extension_amount": 30,
      "item": {
        "name": "Tomato Paste",
        "description": "Description of the tomato paste",
        "sellers_item_identification": "identified as spoon by the seller"
      },
      "price": {
        "price_amount": 1150,
        "base_quantity": 1,
        "price_unit": "NGN per 1"
      }
    },
    {
      "hsn_code": "CC-001",
      "product_category": "Food and Beverages",
      "discount_rate": 2.01,
      "discount_amount": 3500,
      "fee_rate": 1.01,
      "fee_amount": 50,
      "invoiced_quantity": 15,
      "line_extension_amount": 30,
      "item": {
        "name": "Milo and milk",
        "description": "This is a beverage category",
        "sellers_item_identification": "identified as shovel by the seller"
      },
      "price": {
        "price_amount": 9012,
        "base_quantity": 1,
        "price_unit": "NGN per 1"
      }
    }
  ]
}
'

import requests

url = "https://test-api.pasca.co/api/v1/einvoice/sign"

payload = {
    "business_id": "{{BUSINESS_ID}}",
    "irn": "{{IRN}}",
    "issue_date": "2024-05-14",
    "invoice_type_code": "396",
    "document_currency_code": "NGN",
    "tax_currency_code": "NGN",
    "invoice_kind": "B2B",
    "invoice_delivery_period": {
        "start_date": "2024-06-14",
        "end_date": "2024-06-16"
    },
    "order_reference": "order REF IRN?",
    "billing_reference": [
        {
            "irn": "ITW001-E9E0C0D3-20240619",
            "issue_date": "2024-05-14"
        },
        {
            "irn": "ITW001-E9E0C0D3-20240619",
            "issue_date": "2024-05-14"
        }
    ],
    "dispatch_document_reference": {
        "irn": "ITW001-E9E0C0D3-20240619",
        "issue_date": "2024-05-14"
    },
    "receipt_document_reference": {
        "irn": "ITW001-E9E0C0D3-20240619",
        "issue_date": "2024-05-14"
    },
    "originator_document_reference": {
        "irn": "ITW001-E9E0C0D3-20240619",
        "issue_date": "2024-05-14"
    },
    "contract_document_reference": {
        "irn": "ITW001-E9E0C0D3-20240619",
        "issue_date": "2024-05-14"
    },
    "accounting_customer_party": {
        "party_name": "Test Accounting Customer Party",
        "tin": "83526544-2627",
        "email": "test_sender@pasca.co",
        "telephone": "+23480254099000",
        "business_description": "Sample business description",
        "postal_address": {
            "street_name": "32, owonikoko street",
            "city_name": "Gwarikpa",
            "postal_zone": "023401",
            "lga": "NG-AB-ANO",
            "state": "NG-AB",
            "country": "NG"
        }
    },
    "accounting_supplier_party": {
        "party_name": "Dangote Group",
        "tin": "33824622-7135",
        "email": "tobi@pasca.co",
        "telephone": "+2348168527167",
        "business_description": "This is the test supplier details",
        "postal_address": {
            "street_name": "32, owonikoko street",
            "city_name": "Gwarikpa",
            "postal_zone": "023401",
            "lga": "NG-AB-ANO",
            "state": "NG-AB",
            "country": "NG"
        }
    },
    "actual_delivery_date": "2024-05-14",
    "payment_means": [
        {
            "payment_means_code": "10",
            "payment_due_date": "2024-05-14"
        },
        {
            "payment_means_code": "43",
            "payment_due_date": "2024-05-14"
        }
    ],
    "payment_terms_note": "dummy payment terms note (will be encryted in storage)",
    "allowance_charge": [
        {
            "charge_indicator": True,
            "amount": 800.6
        },
        {
            "charge_indicator": False,
            "amount": 10
        }
    ],
    "tax_total": [
        {
            "tax_amount": 56.07,
            "tax_subtotal": [
                {
                    "taxable_amount": 800,
                    "tax_amount": 8,
                    "tax_category": {
                        "id": "LOCAL_SALES_TAX",
                        "percent": 2.3
                    }
                }
            ]
        }
    ],
    "legal_monetary_total": {
        "line_extension_amount": 340.5,
        "tax_exclusive_amount": 400,
        "tax_inclusive_amount": 430,
        "payable_amount": 1500000
    },
    "invoice_line": [
        {
            "hsn_code": "CC-001",
            "product_category": "Food and Beverages",
            "discount_rate": 2.01,
            "discount_amount": 3500,
            "fee_rate": 1.01,
            "fee_amount": 50,
            "invoiced_quantity": 15,
            "line_extension_amount": 30,
            "item": {
                "name": "Tomato Paste",
                "description": "Description of the tomato paste",
                "sellers_item_identification": "identified as spoon by the seller"
            },
            "price": {
                "price_amount": 1150,
                "base_quantity": 1,
                "price_unit": "NGN per 1"
            }
        },
        {
            "hsn_code": "CC-001",
            "product_category": "Food and Beverages",
            "discount_rate": 2.01,
            "discount_amount": 3500,
            "fee_rate": 1.01,
            "fee_amount": 50,
            "invoiced_quantity": 15,
            "line_extension_amount": 30,
            "item": {
                "name": "Milo and milk",
                "description": "This is a beverage category",
                "sellers_item_identification": "identified as shovel by the seller"
            },
            "price": {
                "price_amount": 9012,
                "base_quantity": 1,
                "price_unit": "NGN per 1"
            }
        }
    ]
}
headers = {
    "API-KEY": "<api-key>",
    "API-SECRET": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'API-KEY': '<api-key>',
    'API-SECRET': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    business_id: '{{BUSINESS_ID}}',
    irn: '{{IRN}}',
    issue_date: '2024-05-14',
    invoice_type_code: '396',
    document_currency_code: 'NGN',
    tax_currency_code: 'NGN',
    invoice_kind: 'B2B',
    invoice_delivery_period: {start_date: '2024-06-14', end_date: '2024-06-16'},
    order_reference: 'order REF IRN?',
    billing_reference: [
      {irn: 'ITW001-E9E0C0D3-20240619', issue_date: '2024-05-14'},
      {irn: 'ITW001-E9E0C0D3-20240619', issue_date: '2024-05-14'}
    ],
    dispatch_document_reference: {irn: 'ITW001-E9E0C0D3-20240619', issue_date: '2024-05-14'},
    receipt_document_reference: {irn: 'ITW001-E9E0C0D3-20240619', issue_date: '2024-05-14'},
    originator_document_reference: {irn: 'ITW001-E9E0C0D3-20240619', issue_date: '2024-05-14'},
    contract_document_reference: {irn: 'ITW001-E9E0C0D3-20240619', issue_date: '2024-05-14'},
    accounting_customer_party: {
      party_name: 'Test Accounting Customer Party',
      tin: '83526544-2627',
      email: 'test_sender@pasca.co',
      telephone: '+23480254099000',
      business_description: 'Sample business description',
      postal_address: {
        street_name: '32, owonikoko street',
        city_name: 'Gwarikpa',
        postal_zone: '023401',
        lga: 'NG-AB-ANO',
        state: 'NG-AB',
        country: 'NG'
      }
    },
    accounting_supplier_party: {
      party_name: 'Dangote Group',
      tin: '33824622-7135',
      email: 'tobi@pasca.co',
      telephone: '+2348168527167',
      business_description: 'This is the test supplier details',
      postal_address: {
        street_name: '32, owonikoko street',
        city_name: 'Gwarikpa',
        postal_zone: '023401',
        lga: 'NG-AB-ANO',
        state: 'NG-AB',
        country: 'NG'
      }
    },
    actual_delivery_date: '2024-05-14',
    payment_means: [
      {payment_means_code: '10', payment_due_date: '2024-05-14'},
      {payment_means_code: '43', payment_due_date: '2024-05-14'}
    ],
    payment_terms_note: 'dummy payment terms note (will be encryted in storage)',
    allowance_charge: [{charge_indicator: true, amount: 800.6}, {charge_indicator: false, amount: 10}],
    tax_total: [
      {
        tax_amount: 56.07,
        tax_subtotal: [
          {
            taxable_amount: 800,
            tax_amount: 8,
            tax_category: {id: 'LOCAL_SALES_TAX', percent: 2.3}
          }
        ]
      }
    ],
    legal_monetary_total: {
      line_extension_amount: 340.5,
      tax_exclusive_amount: 400,
      tax_inclusive_amount: 430,
      payable_amount: 1500000
    },
    invoice_line: [
      {
        hsn_code: 'CC-001',
        product_category: 'Food and Beverages',
        discount_rate: 2.01,
        discount_amount: 3500,
        fee_rate: 1.01,
        fee_amount: 50,
        invoiced_quantity: 15,
        line_extension_amount: 30,
        item: {
          name: 'Tomato Paste',
          description: 'Description of the tomato paste',
          sellers_item_identification: 'identified as spoon by the seller'
        },
        price: {price_amount: 1150, base_quantity: 1, price_unit: 'NGN per 1'}
      },
      {
        hsn_code: 'CC-001',
        product_category: 'Food and Beverages',
        discount_rate: 2.01,
        discount_amount: 3500,
        fee_rate: 1.01,
        fee_amount: 50,
        invoiced_quantity: 15,
        line_extension_amount: 30,
        item: {
          name: 'Milo and milk',
          description: 'This is a beverage category',
          sellers_item_identification: 'identified as shovel by the seller'
        },
        price: {price_amount: 9012, base_quantity: 1, price_unit: 'NGN per 1'}
      }
    ]
  })
};

fetch('https://test-api.pasca.co/api/v1/einvoice/sign', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "status": true,
  "code": 200,
  "message": "Invoice signed successfully",
  "data": []
}

{
  "status": false,
  "code": 400,
  "message": "IRN already exists.",
  "data": null,
  "error": [],
  "timestamp": "2025-09-23T11:09:04.747826Z"
}

{
  "status": false,
  "code": 401,
  "message": "Unauthorized",
  "data": null,
  "error": {
    "details": "invalid or missing API credentials"
  }
}