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fin

Finance & Accounting

Accounts receivable and payable, payments, the general ledger and the closing cycle — invoices, journal entries, the chart of accounts, cost centers, fiscal periods, tax codes and exchange rates. The system of record for money owed and money owing. Feed an e-invoice provider, a bank reconciliation tool or an external BI warehouse from these endpoints.

GET/v1/fin/invoicesScope: finance:read

List invoices

Returns a cursor-paginated list of invoices. Filter by lifecycle status, partner or direction (receivable vs payable).

Query parameters

limitoptional	integerPage size, 1–200 (default 50).
cursoroptional	stringPagination cursor from a previous response.
statusoptional	stringFilter by status: open, paid, overdue or void.
partner_idoptional	stringFilter by partner (customer or supplier).
directionoptional	stringreceivable (sales) or payable (purchase).

Request

curl "https://api.apusplatform.com/v1/fin/invoices" \
  -H "Authorization: Bearer $APUS_TOKEN"

Response

{
  "data": [
    {
      "id": "inv_1a2b",
      "number": "INV-2026-000142",
      "direction": "receivable",
      "partner_id": "prt_1a2b",
      "status": "open",
      "issue_date": "2026-07-20",
      "due_date": "2026-08-19",
      "total": {
        "amount": 13750000,
        "currency": "VND"
      },
      "balance": {
        "amount": 13750000,
        "currency": "VND"
      },
      "updated_at": "2026-07-20T04:20:11Z"
    }
  ],
  "has_more": true,
  "next_cursor": "crsr_9a10"
}

POST/v1/fin/invoicesScope: finance:write

Create an invoice

Creates a draft invoice. Totals and tax are computed from the lines; the number is assigned on posting.

Body

partner_idrequired	stringCustomer (receivable) or supplier (payable).
directionrequired	stringreceivable or payable.
linesrequired	stringLine items: { description, quantity, unit_price, tax_code }.
due_dateoptional	stringPayment due date (YYYY-MM-DD).

Request

curl -X POST "https://api.apusplatform.com/v1/fin/invoices" \
  -H "Authorization: Bearer $APUS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "partner_id": "prt_1a2b",
    "direction": "receivable",
    "due_date": "2026-08-19",
    "lines": [
      {
        "description": "Steel bracket 8mm",
        "quantity": 100,
        "unit_price": {
          "amount": 125000,
          "currency": "VND"
        },
        "tax_code": "VAT10"
      }
    ]
  }'

Response

{
  "id": "inv_1a2b",
  "number": "INV-2026-000142",
  "status": "open",
  "total": {
    "amount": 13750000,
    "currency": "VND"
  },
  "created_at": "2026-07-20T02:10:00Z"
}

GET/v1/fin/invoices/{id}Scope: finance:read

Retrieve an invoice

Returns a single invoice with its lines and running balance.

Path parameters

idrequired

stringInvoice id.

Request

curl "https://api.apusplatform.com/v1/fin/invoices/inv_1a2b" \
  -H "Authorization: Bearer $APUS_TOKEN"

Response

{
  "id": "inv_1a2b",
  "number": "INV-2026-000142",
  "direction": "receivable",
  "partner_id": "prt_1a2b",
  "status": "open",
  "issue_date": "2026-07-20",
  "due_date": "2026-08-19",
  "lines": [
    {
      "description": "Steel bracket 8mm",
      "quantity": 100,
      "unit_price": {
        "amount": 125000,
        "currency": "VND"
      },
      "tax_code": "VAT10",
      "subtotal": {
        "amount": 12500000,
        "currency": "VND"
      }
    }
  ],
  "subtotal": {
    "amount": 12500000,
    "currency": "VND"
  },
  "tax": {
    "amount": 1250000,
    "currency": "VND"
  },
  "total": {
    "amount": 13750000,
    "currency": "VND"
  },
  "balance": {
    "amount": 13750000,
    "currency": "VND"
  },
  "updated_at": "2026-07-20T04:20:11Z"
}

PATCH/v1/fin/invoices/{id}Scope: finance:write

Update an invoice

Updates mutable fields of an invoice while it is still open. Only supplied fields change; a paid or void invoice is read-only.

Path parameters

idrequired

stringInvoice id.

Body

due_dateoptional	stringPayment due date (YYYY-MM-DD).
linesoptional	stringReplacement line items: { description, quantity, unit_price, tax_code }.
memooptional	stringInternal note shown on the document.

Request

curl -X PATCH "https://api.apusplatform.com/v1/fin/invoices/inv_1a2b" \
  -H "Authorization: Bearer $APUS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "due_date": "2026-09-03"
  }'

Response

{
  "id": "inv_1a2b",
  "number": "INV-2026-000142",
  "status": "open",
  "updated_at": "2026-07-20T02:12:00Z"
}

POST/v1/fin/invoices/{id}/voidScope: finance:write

Void an invoice

Voids an invoice, reversing its ledger impact. Only an invoice with no settled payments can be voided.

Path parameters

idrequired

stringInvoice id.

Body

reasonoptional

stringReason recorded in the audit trail.

Request

curl -X POST "https://api.apusplatform.com/v1/fin/invoices/inv_1a2b/void" \
  -H "Authorization: Bearer $APUS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "reason": "Issued to the wrong partner"
  }'

Response

{
  "id": "inv_1a2b",
  "number": "INV-2026-000142",
  "status": "void",
  "voided_at": "2026-07-20T02:18:00Z"
}

GET/v1/fin/paymentsScope: finance:read

List payments

Returns a cursor-paginated list of payments and receipts. Filter by the invoice they settle or by method.

Query parameters

limitoptional	integerPage size, 1–200 (default 50).
cursoroptional	stringPagination cursor from a previous response.
invoice_idoptional	stringReturn only payments applied to this invoice.
methodoptional	stringFilter by method: bank_transfer, cash or card.

Request

curl "https://api.apusplatform.com/v1/fin/payments" \
  -H "Authorization: Bearer $APUS_TOKEN"

Response

{
  "data": [
    {
      "id": "pay_6h7i",
      "invoice_id": "inv_1a2b",
      "amount": {
        "amount": 13750000,
        "currency": "VND"
      },
      "method": "bank_transfer",
      "paid_at": "2026-07-22T03:00:00Z",
      "reference": "FT26073300142"
    }
  ],
  "has_more": false,
  "next_cursor": null
}

POST/v1/fin/paymentsScope: finance:write

Record a payment

Records a payment or receipt against an invoice and applies it to the outstanding balance. Marks the invoice paid once fully settled.

Body

invoice_idrequired	stringInvoice being settled.
amountrequired	object{ amount (minor units), currency }.
methodrequired	stringbank_transfer, cash or card.
paid_atoptional	stringRFC 3339 timestamp of settlement (defaults to now).

Request

curl -X POST "https://api.apusplatform.com/v1/fin/payments" \
  -H "Authorization: Bearer $APUS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "invoice_id": "inv_1a2b",
    "amount": {
      "amount": 13750000,
      "currency": "VND"
    },
    "method": "bank_transfer",
    "paid_at": "2026-07-22T03:00:00Z"
  }'

Response

{
  "id": "pay_6h7i",
  "invoice_id": "inv_1a2b",
  "invoice_status": "paid",
  "created_at": "2026-07-22T03:00:05Z"
}

GET/v1/fin/journal-entriesScope: finance:read

List journal entries

Returns a cursor-paginated list of general-ledger journal entries. Filter by the account they touch or by fiscal period.

Query parameters

limitoptional	integerPage size, 1–200 (default 50).
cursoroptional	stringPagination cursor from a previous response.
accountoptional	stringReturn entries that post to this account code.
periodoptional	stringFiscal period, e.g. 2026-07.

Request

curl "https://api.apusplatform.com/v1/fin/journal-entries" \
  -H "Authorization: Bearer $APUS_TOKEN"

Response

{
  "data": [
    {
      "id": "je_3k4l",
      "date": "2026-07-20",
      "memo": "Sales invoice INV-2026-000142",
      "source": "inv_1a2b",
      "period": "2026-07",
      "posted": true
    }
  ],
  "has_more": true,
  "next_cursor": "crsr_7d8e"
}

POST/v1/fin/journal-entriesScope: finance:write

Create a journal entry

Posts a manual journal entry. Total debits must equal total credits and the target period must be open.

Body

daterequired	stringAccounting date (YYYY-MM-DD).
linesrequired	stringBalanced lines: { account, debit, credit }.
memooptional	stringDescription shown on the entry.

Request

curl -X POST "https://api.apusplatform.com/v1/fin/journal-entries" \
  -H "Authorization: Bearer $APUS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "date": "2026-07-20",
    "memo": "Cash sale receipt",
    "lines": [
      {
        "account": "111",
        "debit": {
          "amount": 13750000,
          "currency": "VND"
        },
        "credit": {
          "amount": 0,
          "currency": "VND"
        }
      },
      {
        "account": "511",
        "debit": {
          "amount": 0,
          "currency": "VND"
        },
        "credit": {
          "amount": 12500000,
          "currency": "VND"
        }
      },
      {
        "account": "3331",
        "debit": {
          "amount": 0,
          "currency": "VND"
        },
        "credit": {
          "amount": 1250000,
          "currency": "VND"
        }
      }
    ]
  }'

Response

{
  "id": "je_3k4l",
  "date": "2026-07-20",
  "period": "2026-07",
  "posted": true,
  "created_at": "2026-07-20T02:20:00Z"
}

GET/v1/fin/journal-entries/{id}Scope: finance:read

Retrieve a journal entry

Returns a single journal entry with its debit and credit lines.

Path parameters

idrequired

stringJournal entry id.

Request

curl "https://api.apusplatform.com/v1/fin/journal-entries/je_3k4l" \
  -H "Authorization: Bearer $APUS_TOKEN"

Response

{
  "id": "je_3k4l",
  "date": "2026-07-20",
  "memo": "Sales invoice INV-2026-000142",
  "source": "inv_1a2b",
  "period": "2026-07",
  "posted": true,
  "lines": [
    {
      "account": "131",
      "debit": {
        "amount": 13750000,
        "currency": "VND"
      },
      "credit": {
        "amount": 0,
        "currency": "VND"
      }
    },
    {
      "account": "511",
      "debit": {
        "amount": 0,
        "currency": "VND"
      },
      "credit": {
        "amount": 12500000,
        "currency": "VND"
      }
    },
    {
      "account": "3331",
      "debit": {
        "amount": 0,
        "currency": "VND"
      },
      "credit": {
        "amount": 1250000,
        "currency": "VND"
      }
    }
  ]
}

GET/v1/fin/accountsScope: finance:read

List accounts

Returns the chart of accounts. Filter by account type.

Query parameters

typeoptional

stringFilter by type: asset, liability, equity, revenue or expense.

Request

curl "https://api.apusplatform.com/v1/fin/accounts" \
  -H "Authorization: Bearer $APUS_TOKEN"

Response

{
  "data": [
    {
      "code": "111",
      "name": "Cash on hand",
      "type": "asset",
      "parent": null
    },
    {
      "code": "112",
      "name": "Cash in banks",
      "type": "asset",
      "parent": null
    },
    {
      "code": "131",
      "name": "Trade receivables",
      "type": "asset",
      "parent": null
    }
  ]
}

GET/v1/fin/cost-centersScope: finance:read

List cost centers

Returns the cost centers used to tag expenses and revenue for management reporting.

No parameters.

Request

curl "https://api.apusplatform.com/v1/fin/cost-centers" \
  -H "Authorization: Bearer $APUS_TOKEN"

Response

{
  "data": [
    {
      "id": "cc_prod",
      "code": "PROD",
      "name": "Production",
      "active": true
    },
    {
      "id": "cc_sales",
      "code": "SALES",
      "name": "Sales & Marketing",
      "active": true
    }
  ]
}

GET/v1/fin/fiscal-periodsScope: finance:read

List fiscal periods

Returns the accounting calendar with each period's open or closed status.

No parameters.

Request

curl "https://api.apusplatform.com/v1/fin/fiscal-periods" \
  -H "Authorization: Bearer $APUS_TOKEN"

Response

{
  "data": [
    {
      "id": "fp_2026_06",
      "period": "2026-06",
      "status": "closed",
      "closed_at": "2026-07-05T09:00:00Z"
    },
    {
      "id": "fp_2026_07",
      "period": "2026-07",
      "status": "open",
      "closed_at": null
    }
  ]
}

POST/v1/fin/fiscal-periods/{id}/closeScope: finance:write

Close a fiscal period

Closes a fiscal period so no further entries can post to it. Fails if earlier periods are still open or unbalanced entries remain.

Path parameters

idrequired

stringFiscal period id.

Request

curl -X POST "https://api.apusplatform.com/v1/fin/fiscal-periods/fp_2026_07/close" \
  -H "Authorization: Bearer $APUS_TOKEN"

Response

{
  "id": "fp_2026_07",
  "period": "2026-07",
  "status": "closed",
  "closed_at": "2026-08-05T09:00:00Z"
}

GET/v1/fin/tax-codesScope: finance:read

List tax codes

Returns the configured VAT and withholding tax codes with their rates and posting accounts.

No parameters.

Request

curl "https://api.apusplatform.com/v1/fin/tax-codes" \
  -H "Authorization: Bearer $APUS_TOKEN"

Response

{
  "data": [
    {
      "code": "VAT10",
      "name": "VAT 10%",
      "rate": 0.1,
      "account": "3331",
      "active": true
    },
    {
      "code": "VAT8",
      "name": "VAT 8%",
      "rate": 0.08,
      "account": "3331",
      "active": true
    },
    {
      "code": "VAT0",
      "name": "VAT 0%",
      "rate": 0,
      "account": "3331",
      "active": true
    }
  ]
}

GET/v1/fin/exchange-ratesScope: finance:read

List exchange rates

Returns exchange rates against the base currency for a given date, used to translate foreign-currency documents.

Query parameters

baseoptional	stringBase currency (default VND).
dateoptional	stringRate date (YYYY-MM-DD); defaults to today.

Request

curl "https://api.apusplatform.com/v1/fin/exchange-rates" \
  -H "Authorization: Bearer $APUS_TOKEN"

Response

{
  "base": "VND",
  "date": "2026-07-20",
  "rates": [
    {
      "currency": "USD",
      "rate": 25450
    },
    {
      "currency": "EUR",
      "rate": 27680
    },
    {
      "currency": "JPY",
      "rate": 162
    }
  ]
}

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