> ## Documentation Index > Fetch the complete documentation index at: https://docs.layerfi.com/llms.txt > Use this file to discover all available pages before exploring further. # Fetch opening balance > Fetches the opening balance for an external account. This is useful when verifying or reconciling the historical balance sheet. ## OpenAPI ````yaml get /v1/businesses/{businessId}/external-accounts/{externalAccountId}/opening-balance openapi: 3.0.1 info: title: API version: latest servers: [] security: - BearerAuth: [] tags: [] externalDocs: url: / paths: /v1/businesses/{businessId}/external-accounts/{externalAccountId}/opening-balance: get: tags: [] summary: Fetch opening balance description: >- Fetches the opening balance for an external account. This is useful when verifying or reconciling the historical balance sheet. operationId: business.external-accounts.opening-balance.get parameters: - name: businessId in: path description: The UUID of the business to fetch opening balance for. required: true schema: type: string - name: externalAccountId in: path description: The UUID of the external account to fetch opening balance for. required: true schema: type: string - name: Content-Type in: header description: Content-Type must be set to application/json. schema: type: string responses: '200': description: '' headers: {} content: application/json: schema: $ref: '#/components/schemas/ApiOpeningBalance' '404': description: >- Business id or external account id is not found. This indicates the business id is invalid or the business has been archived, or the external account id is invalid or the external account has been deleted. content: application/json: schema: $ref: '#/components/schemas/ApiError' deprecated: false components: schemas: ApiOpeningBalance: type: object properties: external_account_external_id: type: string description: >- Unique ID of the external account in an external system for linking and idempotency. example: 0Br385JmgbTryJn8nEBnUb4A5ydv06U9Vbqqq external_account_source: $ref: '#/components/schemas/TransactionSource' description: Source of the external account. balance: type: integer description: Opening balance of the account, in cents. example: 432100 effective_at: type: string format: date-time description: Timestamp for when the account had this balance. created_at: type: string format: date-time description: When the opening balance timestamp was created. updated_at: type: string format: date-time description: When the opening balance timestamp was updated. transaction_tags: type: array items: $ref: '#/components/schemas/ApiTag' description: Tags associated with the opening balance. memo: type: string nullable: true description: >- Memo for any text you would like to associate with the opening balance (for example, to display to end users). metadata: $ref: '#/components/schemas/PlatformDefinedJson' nullable: true description: Arbitrary custom metadata in JSON format with a size limit of 1KB. reference_number: type: string nullable: true description: >- Any (typically user-visible) identifier you would like to associate with the opening balance. ApiError: type: object description: An error object returned in API error responses. properties: type: $ref: '#/components/schemas/ApiErrorType' description: >- A fixed category for the error, helpful for categorizing and processing errors. description: type: string description: A human-readable error description. error_enum: $ref: '#/components/schemas/ApiEnumErrorType' description: >- A stable, machine-readable identifier for programmatically handling specific error conditions. Only present for 4xx client errors—not included for 5xx server errors. Use this instead of parsing the description field, as enum values remain stable across API versions. nullable: true meta: type: object description: Optional additional information about the error. nullable: true required: - type - description TransactionSource: type: string enum: - UNIT - PLAID - API - STRIPE - CUSTOM ApiTag: type: object properties: id: type: string format: uuid description: ID for the tag. key: type: string description: Key for the tag. example: ExampleTagKey dimension_display_name: type: string nullable: true description: Display name for the tag dimension. value: type: string description: Value for the tag. example: ExampleTagValue value_display_name: type: string nullable: true description: Display name for the tag value definition. dimension_id: type: string format: uuid description: ID of the tag dimension this tag belongs to. definition_id: type: string format: uuid description: ID of the tag value definition. archived_at: type: string format: date-time nullable: true description: When the tag was archived. required: - id - key - value - dimension_id - definition_id PlatformDefinedJson: type: object description: Arbitrary JSON data defined by the caller, with a 1KB size constraint. additionalProperties: true example: custom_field: value any valid json: below 1kb nested: meaning of life: 42 array: [] ApiErrorType: type: string enum: - ResourceArchived - AuthFailure - Plaid - Stripe - InvalidState - ResourceNotFound - InvalidParameters - JsonSerialization - Unknown - BadRequest - PaginationCursor - Conflict - LedgerOperationFailed ApiEnumErrorType: type: string description: >- Stable enum values for programmatic error handling. Only present in 4xx error responses. enum: - AccessCodeInvalid - BalanceSheetDoesNotBalance - BalanceSheetMissingAccount - BankStatementParserError - BillStateError - BulkCategorizeFailure - BulkMatchFailure - BusinessTaskAlreadyCompleted - BusinessTaskDeleted - CalendlyOAuthError - CallBookingError - CantUpdateTransactionInCustomerPayout - CantUpdateTransactionInVendorPayout - CheckPayrollConfigNotFound - CheckPayrollServiceNotFound - ClerkUserAlreadyExists - ConflictingQueryParams - CustomAccountAlreadyExists - CustomTransactionCsvParsingError - CustomTransactionUploadFailure - CustomerPayoutInputFormatError - DoesNotMatchExistingEntity - EmptyBatchRequest - ExpenseParserError - ExternalAccountBalanceReconciliationError - ExternalIdConflict - InvalidCategory - InvalidEffectiveDate - InvalidLedgerOperation - InvalidMonthlyAverageRange - InvalidMultiPartRequest - InvalidPaginationCursor - InvalidPayload - InvoiceDeleted - InvoiceNotFound - InvoiceReferenceMismatch - InvoiceStateError - ManualRateLimit - MultipleTagKeyFiltersUnsupported - NoCognitoUserFound - NoOpeningBalanceFound - NotYetReconciled - OnePasswordApiError - OnePasswordItemNotFound - OnePasswordVaultNotFound - OpenAICategorizationError - PaymentLinkInvalid - PayrollStateError - PeriodIsClosed - PeriodNotClosed - PhoneNumberAlreadyRegistered - PlaidApiError - PlaidConnectionBroken - PlaidCreateLinkTokenError - PlaidCredentialsNotConfigured - PlaidExchangePublicTokenError - PlaidGetInstitutionByIdError - PlaidGetItemError - PlaidInvalidEnvironment - PlaidItemAlreadyExists - PlaidItemNotFound - PlaidProcessorApiError - PlaidUnlinkItemError - QueryParamFormat - QueryParamMissing - QuickbooksBrokenConnection - QuickbooksConnectionAlreadyExists - QuickbooksConnectionAlreadySyncing - QuickbooksConnectionMissing - QuickbooksConnectionNotActivated - QuickbooksInvalidRequest - QuickbooksInvalidState - QuickbooksNoMatchingAccount - QuickbooksNonPostingAccountType - QuickbooksNotConfigured - QuickbooksOAuthCallbackInvalid - QuickbooksOAuthError - QuickbooksTokenExpired - ResourceArchived - ScheduleCNotConfigured - SmsNotEnabled - SpecifiedBadRequest - SpecifiedIdNotFound - SplitTransactionError - StepEvaluationBadRequest - StripeConnectAccountIdNotFound - StripeCredentialsNotConfigured - StripeGetBalanceForConnectAccountFailure - StripeRedirectOrRefreshUrlNotConfigured - TagFilterNotFound - UnexpectedQueryParam - UnitAccountsInUse - WrongAnswerType securitySchemes: BearerAuth: type: http scheme: bearer bearerFormat: JWT ````