GET

List books

ENDPOINT/v1/financial-accounts/{financial_account_id}/books

Returns the books (ledger accounts) of this financial account with their running balances. Rook keeps double-entry books per financial account: book transfers post balanced book entries across these books. Read the postings with GET /v1/financial-accounts/{financial_account_id}/book-transfers. This operation is program-scoped.

Authentication & Headers

Header	Type	Requirement	Description
Authorization	string	REQUIRED	API key passed as an HTTP Bearer token: `Bearer rk_live_...`
X-Program-ID	UUID	PROGRAM-SCOPED	Program boundary UUID that scopes the issuing card, wallet, or transfer.

Path Parameters

Parameter	Type	Requirement	Description
financial_account_id	string	REQUIRED	Unique identifier of the financial account.

Query Parameters

Parameter	Type	Requirement	Description
page	integer	OPTIONAL	1-based page index. Default 1. Values below 1 are treated as 1.
page_size	integer	OPTIONAL	Number of objects to return in the page. Minimum 1, maximum 100, default 10. Also accepted as `page-size`. Values below 1 fall back to the default; values above 100 are capped at 100.

Response Codes & Schemas

200The books of the financial account.

application/json

{
  "data": [
    {
      "name": "principal",
      "object": "book",
      "financial_account_id": "9b3e1c70-4d2a-4f86-8c1b-5e7a2d9f0c14",
      "type": "DEBIT_NORMAL",
      "balance": {
        "amount": 125000,
        "currency": "USD"
      },
      "updated_at": "2026-08-27T15:04:05Z"
    },
    {
      "name": "interest",
      "object": "book",
      "financial_account_id": "9b3e1c70-4d2a-4f86-8c1b-5e7a2d9f0c14",
      "type": "DEBIT_NORMAL",
      "balance": {
        "amount": 4280,
        "currency": "USD"
      },
      "updated_at": "2026-08-28T02:00:00Z"
    },
    {
      "name": "fees",
      "object": "book",
      "financial_account_id": "9b3e1c70-4d2a-4f86-8c1b-5e7a2d9f0c14",
      "type": "DEBIT_NORMAL",
      "balance": {
        "amount": 0,
        "currency": "USD"
      },
      "updated_at": "2026-08-12T10:15:00Z"
    },
    {
      "name": "unallocated",
      "object": "book",
      "financial_account_id": "9b3e1c70-4d2a-4f86-8c1b-5e7a2d9f0c14",
      "type": "CREDIT_NORMAL",
      "balance": {
        "amount": 129280,
        "currency": "USD"
      },
      "updated_at": "2026-08-27T15:04:05Z"
    }
  ],
  "total_count": 4
}

400Bad Request: malformed JSON, failed schema validation, or conflicting parameters.

application/json

{
  "error": {
    "type": "invalid_request_error",
    "code": "invalid_request",
    "message": "invalid order by: foo. Valid options are: [created_at updated_at]",
    "param": "order_by",
    "request_id": "550e8400-e29b-41d4-a716-446655440000",
    "doc_url": "https://docs.rookpayments.com/errors/invalid_request"
  }
}

401Unauthorized: missing, malformed, or unknown API key.

application/json

{
  "error": {
    "type": "authentication_error",
    "code": "authentication_error",
    "message": "A valid API key is required.",
    "param": null,
    "request_id": "550e8400-e29b-41d4-a716-446655440000",
    "doc_url": "https://docs.rookpayments.com/errors/authentication_error"
  }
}

403Forbidden: the API key is denied by RBAC, or it cannot access this program. A resource that exists on another program or organization returns `404 not_found`, not `403`.

application/json

{
  "error": {
    "type": "permission_error",
    "code": "permission_denied",
    "message": "The API key cannot access this program.",
    "param": "X-Program-ID",
    "request_id": "550e8400-e29b-41d4-a716-446655440000",
    "doc_url": "https://docs.rookpayments.com/errors/permission_denied"
  }
}

404Not Found: unknown id, or the resource is not visible to this API key.

application/json

{
  "error": {
    "type": "not_found_error",
    "code": "not_found",
    "message": "No card found for the given id.",
    "param": "card_id",
    "request_id": "550e8400-e29b-41d4-a716-446655440000",
    "doc_url": "https://docs.rookpayments.com/errors/not_found"
  }
}

429Too Many Requests: the API key exceeded its rate limit.

application/json

{
  "error": {
    "type": "rate_limit_error",
    "code": "rate_limited",
    "message": "Rate limit exceeded. Retry after the number of seconds in Retry-After.",
    "param": null,
    "request_id": "550e8400-e29b-41d4-a716-446655440000",
    "doc_url": "https://docs.rookpayments.com/errors/rate_limited"
  }
}

500Internal Server Error: unexpected failure. Retry with the same Idempotency-Key.

application/json

{
  "error": {
    "type": "api_error",
    "code": "internal_error",
    "message": "An unexpected error occurred. Retry with the same Idempotency-Key.",
    "param": null,
    "request_id": "550e8400-e29b-41d4-a716-446655440000",
    "doc_url": "https://docs.rookpayments.com/errors/internal_error"
  }
}