» Invoice POST API Documentation
» Invoice POST API Documentation

Create an Invoice for an Specific Order: /orders/{order_id}/invoices

POST
https://dev-api.exsited.com/api/v3/orders/{order_id}/invoices
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Purpose

This endpoint is used to create an invoice linked to a specific order, associating it with the provided order_id.

Use Case

Useful for generating an invoice for an order to facilitate billing and payment tracking.

Path Parameters
ParameterTypeDescription
order_idstringUnique identifier of the order to link with the invoice.
Query Parameters

No query parameter is required for this endpoint.

Request Body
{
    "invoice": 
    {
        "invoice_note": "INVOICE_NOTE"
    }
}
Attribute Type Description
invoice_note String Notes or remarks for the invoice
Response

The response contains details about the created invoice, including its status, associated order ID, billing and due dates, payment status, totals and tax information. It also provides metadata like creation time, custom attributes and linked items.

Response Body
{
    "invoice": {
        "status": "STATUS",
        "id": "INVOICE_ID",
        "type": "INVOICE_TYPE",
        "custom_form": {
            "uuid": "FORM_UUID",
            "name": "FORM_NAME"
        },
        "currency": {
            "uuid": "CURRENCY_UUID",
            "name": "CURRENCY_NAME",
            "link": "CURRENCY_LINK"
        },
        "customer_purchase_order_id": "PURCHASE_ORDER_ID",
        "billing_start_date": "BILLING_START_DATE",
        "alternate_billing_start_date": "ALTERNATE_BILLING_START_DATE",
        "billing_end_date": "BILLING_END_DATE",
        "alternate_billing_end_date": "ALTERNATE_BILLING_END_DATE",
        "issue_date": "ISSUE_DATE",
        "alternate_issue_date": "ALTERNATE_ISSUE_DATE",
        "due_date": "DUE_DATE",
        "alternate_due_date": "ALTERNATE_DUE_DATE",
        "subtotal": "SUBTOTAL",
        "tax": "TAX",
        "total": "TOTAL",
        "paid": "PAID_AMOUNT",
        "due": "DUE_AMOUNT",
        "payment_status": "PAYMENT_STATUS",
        "last_payment": "LAST_PAYMENT",
        "discount_amount": "DISCOUNT_AMOUNT",
        "price_tax_inclusive": "TAX_INCLUSIVE",
        "invoice_note": "INVOICE_NOTE",
        "account_id": "ACCOUNT_ID",
        "order_id": "ORDER_ID",
        "kpis": {
            "outstanding": "OUTSTANDING",
            "overdue": "OVERDUE",
            "last_payment_date": "LAST_PAYMENT_DATE",
            "payment_applied": "PAYMENT_APPLIED",
            "credit_applied": "CREDIT_APPLIED",
            "credit_issued": "CREDIT_ISSUED",
            "last_reactivated_on": "LAST_REACTIVATED_DATE",
            "last_cancelled_on": "LAST_CANCELLED_DATE",
            "last_amended_on": "LAST_AMENDED_DATE",
            "voided_on": "VOIDED_DATE",
            "deleted_on": "DELETED_DATE"
        },
        "created_by": "CREATED_BY",
        "created_on": "CREATED_ON",
        "last_updated_by": "LAST_UPDATED_BY",
        "last_updated_on": "LAST_UPDATED_ON",
        "uuid": "INVOICE_UUID",
        "version": "VERSION",
        "custom_attributes": [
            {
                "name": "ATTRIBUTE_NAME",
                "value": "ATTRIBUTE_VALUE"
            }
        ],
        "custom_objects": [],
        "lines": [
            {
                "subtotal": "LINE_SUBTOTAL",
                "total": "LINE_TOTAL",
                "tax": {
                    "amount": "TAX_AMOUNT",
                    "uuid": "TAX_UUID",
                    "code": "TAX_CODE",
                    "rate": "TAX_RATE",
                    "link": "TAX_LINK"
                },
                "accounting_code": {
                    "sales_revenue": "ACCOUNTING_CODE"
                },
                "item_uuid": "ITEM_UUID",
                "item_id": "ITEM_ID",
                "item_order_quantity": "ORDER_QUANTITY",
                "item_uom": "UNIT_OF_MEASURE",
                "item_warehouse": "WAREHOUSE_NAME",
                "pricing_snapshot_uuid": "PRICING_SNAPSHOT_UUID",
                "charging_start_date": "CHARGING_START_DATE",
                "alternate_charging_start_date": "ALTERNATE_CHARGING_START_DATE",
                "charging_end_date": "CHARGING_END_DATE",
                "alternate_charging_end_date": "ALTERNATE_CHARGING_END_DATE",
                "uuid": "LINE_UUID",
                "version": "LINE_VERSION"
            }
        ]
    }
}
Attribute Type Description
status String Current status of the invoice (example: ACTIVE)
id String Unique identifier of the invoice (human-readable code)
type String Type of invoice (example: LINKED_WITH_ORDER)
custom_form Object Custom form details linked to the invoice
currency Object Currency information for the invoice
customer_purchase_order_id String External customer purchase order reference
issue_date String (DateTime) Date when invoice was issued
alternate_issue_date String (DateTime) Alternate invoice issue date
due_date String (DateTime) Due date for payment
alternate_due_date String (DateTime) Alternate due date for payment
subtotal String (Decimal) Subtotal amount before taxes/discounts
tax String (Decimal) Tax applied
tax_total String (Decimal) Total tax amount
total String (Decimal) Final total of invoice
paid String (Decimal) Amount paid
due String (Decimal) Remaining amount due
payment_status String Status of payment (example: PAID)
last_payment Object Information about the last payment
discount_amount String (Decimal) Total discount applied
price_tax_inclusive String (Boolean) Whether tax is included in prices
invoice_note String Additional notes for the invoice
account_id String Associated account identifier
order_id String Linked order identifier
created_by String User who created the invoice
created_on String (DateTime) Creation timestamp
last_updated_by String User who last updated the invoice
last_updated_on String (DateTime) Last update timestamp
uuid String (UUID) Unique system identifier for invoice
version String Version number of the record
custom_attributes Array List of custom attributes applied
custom_objects Array List of custom objects linked
lines Array Line items of the invoice
kpis Object Key performance indicators for invoice

Cancel an Invoice: /invoices/{invoice_id}/cancel

POST
https://dev-api.exsited.com/api/v3/invoices/{invoice_id}/cancel
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Purpose

This endpoint allows canceling an existing invoice by its unique invoice identifier. When an invoice is canceled, its status changes to INACTIVE, and no further payments or modifications can be made. Canceling ensures proper financial record-keeping and prevents duplicate or unintended billing.

Use Case
  • Businesses can use this API to cancel invoices that are no longer valid, such as when an order is voided, a customer cancels their request, or a billing correction is needed.
  • The API is particularly useful for automating workflows where invoices must be deactivated after an order cancellation, subscription termination, or service withdrawal.
Path Parameters
Parameter Type Description
invoice_id String Unique identifier of the invoice to be canceled.
Query Parameters

No query parameter is required for this endpoint.

Request Body

This API does not require a request body for the cancellation.

Response

Upon successful cancellation, the API responds with detailed invoice data. The invoice status is updated to INACTIVE, and payment_status reflects the latest settlement state (example: PAID if already paid). The response includes all core invoice fields such as identifiers, billing cycle dates, financial details (subtotal, tax, total, paid, due), account and order links, KPIs (outstanding balance, overdue, credit applied and so on), audit trail (created_by, last_updated_by, timestamps), and structural components like custom_attributes, custom_objects, and lines. This ensures both financial reconciliation and operational traceability for canceled invoices.

Response Body
{
    "invoice": {
        "status": "STATUS",
        "id": "INVOICE_ID",
        "type": "INVOICE_TYPE",
        "custom_form": {
            "uuid": "CUSTOM_FORM_UUID",
            "name": "CUSTOM_FORM_NAME"
        },
        "currency": {
            "uuid": "CURRENCY_UUID",
            "name": "CURRENCY_NAME",
            "link": "CURRENCY_LINK"
        },
        "customer_purchase_order_id": "CUSTOMER_PURCHASE_ORDER_ID",
        "billing_start_date": "BILLING_START_DATE",
        "alternate_billing_start_date": "ALTERNATE_BILLING_START_DATE",
        "billing_end_date": "BILLING_END_DATE",
        "alternate_billing_end_date": "ALTERNATE_BILLING_END_DATE",
        "issue_date": "ISSUE_DATE",
        "alternate_issue_date": "ALTERNATE_ISSUE_DATE",
        "due_date": "DUE_DATE",
        "alternate_due_date": "ALTERNATE_DUE_DATE",
        "subtotal": "SUBTOTAL",
        "tax": "TAX",
        "total": "TOTAL",
        "paid": "PAID",
        "due": "DUE",
        "shipping_cost": "SHIPPING_COST",
        "payment_status": "PAYMENT_STATUS",
        "last_payment": "LAST_PAYMENT",
        "discount_amount": "DISCOUNT_AMOUNT",
        "price_tax_inclusive": "PRICE_TAX_INCLUSIVE",
        "invoice_note": "INVOICE_NOTE",
        "account_id": "ACCOUNT_ID",
        "account_name": "ACCOUNT_NAME",
        "order_id": "ORDER_ID",
        "kpis": {
            "outstanding": "KPI_OUTSTANDING",
            "overdue": "KPI_OVERDUE",
            "last_payment_date": "KPI_LAST_PAYMENT_DATE",
            "payment_applied": "KPI_PAYMENT_APPLIED",
            "credit_applied": "KPI_CREDIT_APPLIED",
            "credit_issued": "KPI_CREDIT_ISSUED",
            "last_reactivated_on": "KPI_LAST_REACTIVATED_ON",
            "last_cancelled_on": "KPI_LAST_CANCELLED_ON",
            "last_amended_on": "KPI_LAST_AMENDED_ON",
            "voided_on": "KPI_VOIDED_ON",
            "deleted_on": "KPI_DELETED_ON"
        },
        "created_by": "CREATED_BY",
        "created_on": "CREATED_ON",
        "last_updated_by": "LAST_UPDATED_BY",
        "last_updated_on": "LAST_UPDATED_ON",
        "uuid": "UUID",
        "version": "VERSION",
        "custom_attributes": [],
        "custom_objects": [],
        "lines": []
    }
}
Attribute Type Description
status String Current status of the invoice (example: ACTIVE, INACTIVE)
id String Unique identifier of the invoice
type String Type of invoice (example: LINKED_WITH_ORDER)
custom_form Object Custom form details linked to invoice
currency Object Currency details of the invoice
customer_purchase_order_id String External customer purchase order reference
billing_start_date String (DateTime) Start date of billing period
alternate_billing_start_date String (DateTime) Alternate start date of billing
billing_end_date String (DateTime) End date of billing period
alternate_billing_end_date String (DateTime) Alternate end date of billing
issue_date String (DateTime) Date when invoice was issued
alternate_issue_date String (DateTime) Alternate invoice issue date
due_date String (DateTime) Due date for payment
alternate_due_date String (DateTime) Alternate due date
subtotal String (Decimal) Subtotal before tax/discounts
tax String (Decimal) Tax amount
total String (Decimal) Total invoice amount
paid String (Decimal) Amount paid
due String (Decimal) Amount remaining due
shipping_cost String (Decimal) Shipping cost applied
payment_status String Status of payment (example: PAID, UNPAID)
last_payment Object / Null Last payment details, or null if none
discount_amount String (Decimal) Discount amount applied
price_tax_inclusive String (Boolean) Whether prices include tax
invoice_note String Notes or remarks for invoice
account_id String Linked account identifier
account_name String Name of linked account
order_id String Linked order identifier
kpis Object Key performance indicators
created_by String User who created the invoice
created_on String (DateTime) Creation timestamp
last_updated_by String User who last updated the invoice
last_updated_on String (DateTime) Last update timestamp
uuid String (UUID) System unique identifier
version String Record version number
custom_attributes Array Custom attributes attached
custom_objects Array Custom objects attached
lines Array Invoice line items

Reactivate an Invoice: /invoices/{invoice_id}/reactivate

POST
https://dev-api.exsited.com/api/v3/invoices/{invoice_id}/reactivate
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Purpose

This endpoint reactivates a previously canceled invoice, changing its status back to ACTIVE. It ensures that a canceled invoice can be reused for billing, payment tracking, and further operations without having to create a new one.

Use Case
  • When an invoice was canceled by mistake and needs to be reinstated.
  • If a customer resumes a transaction that was previously marked as canceled.
  • To restore invoice continuity in reporting and auditing systems.
Path Parameters
Parameter Type Description
invoice_id String Unique identifier of the invoice that needs to be reactivated.
Query Parameters

No query parameter is required for this endpoint.

Request Body

This API does not require a request body for the reactivation.

Response

On success, the API returns a full invoice object with its status updated to ACTIVE. The response contains key invoice details including its ID, type, form information, currency, issue and due dates, totals, payment status, and associated KPIs. The reactivated invoice maintains its original relationships (example: account, order, custom form) but its status changes to ACTIVE. Audit metadata (created by, created on, last updated by, last updated on, version) is also included to support traceability.

Response Body
{
    "invoice": {
        "status": "STATUS",
        "id": "INVOICE_ID",
        "type": "INVOICE_TYPE",
        "custom_form": {
            "uuid": "CUSTOM_FORM_UUID",
            "name": "CUSTOM_FORM_NAME"
        },
        "currency": {
            "uuid": "CURRENCY_UUID",
            "name": "CURRENCY_NAME",
            "link": "CURRENCY_LINK"
        },
        "customer_purchase_order_id": "CUSTOMER_PURCHASE_ORDER_ID",
        "billing_start_date": "BILLING_START_DATE",
        "alternate_billing_start_date": "ALTERNATE_BILLING_START_DATE",
        "billing_end_date": "BILLING_END_DATE",
        "alternate_billing_end_date": "ALTERNATE_BILLING_END_DATE",
        "issue_date": "ISSUE_DATE",
        "alternate_issue_date": "ALTERNATE_ISSUE_DATE",
        "due_date": "DUE_DATE",
        "alternate_due_date": "ALTERNATE_DUE_DATE",
        "subtotal": "SUBTOTAL",
        "tax": "TAX",
        "total": "TOTAL",
        "paid": "PAID",
        "due": "DUE",
        "shipping_cost": "SHIPPING_COST",
        "payment_status": "PAYMENT_STATUS",
        "last_payment": "LAST_PAYMENT",
        "discount_amount": "DISCOUNT_AMOUNT",
        "price_tax_inclusive": "PRICE_TAX_INCLUSIVE",
        "invoice_note": "INVOICE_NOTE",
        "account_id": "ACCOUNT_ID",
        "account_name": "ACCOUNT_NAME",
        "order_id": "ORDER_ID",
        "kpis": {
            "outstanding": "KPI_OUTSTANDING",
            "overdue": "KPI_OVERDUE",
            "last_payment_date": "KPI_LAST_PAYMENT_DATE",
            "payment_applied": "KPI_PAYMENT_APPLIED",
            "credit_applied": "KPI_CREDIT_APPLIED",
            "credit_issued": "KPI_CREDIT_ISSUED",
            "last_reactivated_on": "KPI_LAST_REACTIVATED_ON",
            "last_cancelled_on": "KPI_LAST_CANCELLED_ON",
            "last_amended_on": "KPI_LAST_AMENDED_ON",
            "voided_on": "KPI_VOIDED_ON",
            "deleted_on": "KPI_DELETED_ON"
        },
        "created_by": "CREATED_BY",
        "created_on": "CREATED_ON",
        "last_updated_by": "LAST_UPDATED_BY",
        "last_updated_on": "LAST_UPDATED_ON",
        "uuid": "UUID",
        "version": "VERSION",
        "custom_attributes": [],
        "custom_objects": [],
        "lines": []
    }
}
Attribute Type Description
status String Current status of the invoice (example: ACTIVE, INACTIVE)
id String Unique identifier of the invoice
type String Type of invoice (example: LINKED_WITH_ORDER)
custom_form Object Custom form details linked to invoice
currency Object Currency details of the invoice
customer_purchase_order_id String External customer purchase order reference
billing_start_date String (DateTime) Start date of billing period
alternate_billing_start_date String (DateTime) Alternate start date of billing
billing_end_date String (DateTime) End date of billing period
alternate_billing_end_date String (DateTime) Alternate end date of billing
issue_date String (DateTime) Date when invoice was issued
alternate_issue_date String (DateTime) Alternate invoice issue date
due_date String (DateTime) Due date for payment
alternate_due_date String (DateTime) Alternate due date
subtotal String (Decimal) Subtotal before tax/discounts
tax String (Decimal) Tax amount
total String (Decimal) Total invoice amount
paid String (Decimal) Amount paid
due String (Decimal) Amount remaining due
shipping_cost String (Decimal) Shipping cost applied
payment_status String Status of payment (example: PAID, UNPAID)
last_payment Object / Null Last payment details, or null if none
discount_amount String (Decimal) Discount amount applied
price_tax_inclusive String (Boolean) Whether prices include tax
invoice_note String Notes or remarks for invoice
account_id String Linked account identifier
account_name String Name of linked account
order_id String Linked order identifier
kpis Object Key performance indicators
created_by String User who created the invoice
created_on String (DateTime) Creation timestamp
last_updated_by String User who last updated the invoice
last_updated_on String (DateTime) Last update timestamp
uuid String (UUID) System unique identifier
version String Record version number
custom_attributes Array Custom attributes attached
custom_objects Array Custom objects attached
lines Array Invoice line items

Create a Note for an Invoice: /invoices/{invoice_id}/notes

POST
https://dev-api.exsited.com/api/v3/invoices/{invoice_id}/notes
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Purpose

This endpoint allows you to create a new note for a specific invoice. You can optionally attach a file (such as a document or image) to the note.

Use Case
  • Add comments or internal notes to invoices.
  • Attach supporting documents (receipts, approvals, scanned copies) to invoices.
  • Maintain audit and collaboration records on invoices.
Path Parameters
Parameter Type Required Description
invoice_id string Yes Unique identifier of the invoice.
Query Parameters

No query parameters required for this endpoint.

Request Body

The request must be sent as multipart/form-data.

Attribute Type Required Description
note string Yes Content of the note (HTML supported).
file file No File to attach with the note. Accepts common document and image formats.
Response

On success, the API returns the order object containing a notes object with the UUID of the newly created note. This UUID can later be used to fetch note details, list attached files, or download specific files.

Response Body
{
    "invoice": {
        "notes": {
            "uuid": "uuid"
        }
    }
}
Attribute Type Description
invoice object Container object holding invoice data.
invoice.notes object Newly created note object.
invoice.notes.uuid string Unique identifier (UUID) of the created note.