> ## Documentation Index > Fetch the complete documentation index at: https://docs.codaclean.io/llms.txt > Use this file to discover all available pages before exploring further. # Bankrekening toevoegen > Links the IBAN to the customer. BIC and bank name are derived by Codaclean. The request body must be empty or `{}`. **Required scope:** `customers:write` ## OpenAPI ````yaml POST /customers/{customerId}/bank-accounts/{iban}/new openapi: 3.1.0 info: title: Codaclean API version: '1.0' description: > The Codaclean external API lets partner software (accounting tools, practice management software, sync agents) integrate with Codaclean on behalf of an accounting firm: manage its customers, request CODA and CODB mandates, and retrieve the CODA and CODB files Codaclean receives for them. servers: - url: https://api.codaclean.io/v1 description: Production - url: https://api.test.codaclean.io/v1 description: Staging security: - apiKeyAuth: [] bearerAuth: [] tags: - name: Authentication description: Obtain and refresh the ID token sent with every other call. - name: Utilities description: Connectivity check. - name: Customers description: The customers (client companies) managed by the accounting firm. - name: Bank accounts description: Bank accounts (IBANs) linked to a customer. - name: Customer payroll providers description: Payroll providers (social secretariats) linked to a customer. - name: Mandates description: CODA mandates (per bank account) and CODB mandates (per payroll provider). - name: Reference data description: Banks and payroll providers known to Codaclean. - name: CODA files description: Bank statement files in CODA format. - name: CODB files description: Payroll files in CODB format, delivered by payroll providers. paths: /customers/{customerId}/bank-accounts/{iban}/new: parameters: - $ref: '#/components/parameters/CustomerId' - $ref: '#/components/parameters/Iban' post: tags: - Bank accounts summary: Add a bank account description: | Links the IBAN to the customer. BIC and bank name are derived by Codaclean. The request body must be empty or `{}`. **Required scope:** `customers:write` operationId: addCustomerBankAccount responses: '201': description: Bank account added. content: application/json: schema: $ref: '#/components/schemas/BankAccount' examples: added: summary: Bank account added value: iban: BE08068722124813 currency: EUR bic: GKCC BE BB bankName: Belfius '400': description: >- `invalidPayload`, `unknownField`, `invalidIdentifier` or `invalidIban`. content: application/json: schema: $ref: '#/components/schemas/Error' examples: invalidIban: summary: Invalid IBAN value: message: IBAN BE00000000000000 is not valid code: invalidIban '401': $ref: '#/components/responses/Unauthorized' '403': description: >- `forbiddenScope`, `accessDenied`, or `belongsToAnotherTenant` — the IBAN is used by another accounting firm. content: application/json: schema: $ref: '#/components/schemas/Error' examples: noApiKey: summary: No API key value: message: Forbidden invalidApiKey: summary: Invalid API key value: message: Forbidden '404': description: >- `customerNotFound` — the customer does not exist or belongs to another accounting firm. content: application/json: schema: $ref: '#/components/schemas/Error' examples: customerNotFound: summary: Unknown customer value: message: Customer 000000000000000000000000 not found code: customerNotFound '409': description: >- `ibanAlreadyInUse` (already registered in your accounting firm) or `customerAlreadyArchived`. content: application/json: schema: $ref: '#/components/schemas/Error' examples: ibanAlreadyInUse: summary: IBAN already registered value: message: IBAN BE08068722124813 is already in use code: ibanAlreadyInUse '429': $ref: '#/components/responses/TooManyRequests' '500': $ref: '#/components/responses/InternalError' components: parameters: CustomerId: name: customerId in: path required: true description: >- Customer identifier (24-character hexadecimal string), as returned in `id`. schema: type: string Iban: name: iban in: path required: true description: >- IBAN of the bank account. Spaces are removed and letters are uppercased before use. schema: type: string schemas: BankAccount: type: object properties: iban: type: string currency: type: string description: >- Always `EUR` unless another value is stored. Output only; not accepted as input. bic: type: string description: >- Derived from the IBAN by Codaclean. Formatted with spaces, for example `GEBA BE BB`. bankName: type: string connectorId: type: integer description: >- Present when the bank account is served through a CODAlight connector. Error: type: object description: > Error body. `code` is a stable, machine-readable token; it is present on errors returned by the customers, mandates and reference-data endpoints. Some errors carry extra keys, such as `fields` or `candidates`. required: - message properties: message: type: string description: Human-readable description. Do not parse it. code: type: string description: | Machine-readable error code. **See also:** [Errors](/api/errors#error-codes) fields: type: array items: type: string description: >- Offending fields. Present with `unknownField` and `fieldNotUpdatable`. candidates: type: array description: Present with `connectorSelectionRequired`. items: $ref: '#/components/schemas/ConnectorCandidate' ConnectorCandidate: type: object properties: connectorId: type: integer name: type: string bicCode: type: string available: type: boolean Message: type: object description: Confirmation returned by actions that do not return a resource. required: - message properties: message: type: string responses: Unauthorized: description: >- Missing, invalid or expired ID token, or user not allowed to use the API. content: application/json: schema: $ref: '#/components/schemas/Message' examples: noToken: summary: No ID token value: message: Unauthorized invalidToken: summary: Invalid or expired ID token value: message: Unauthorized TooManyRequests: description: Rate limit or quota exceeded for this API key. content: application/json: schema: $ref: '#/components/schemas/Message' examples: tooManyRequests: summary: Rate limit exceeded value: message: Too Many Requests InternalError: description: Unexpected server error. content: application/json: schema: $ref: '#/components/schemas/Error' examples: internalError: summary: Unexpected server error value: message: Internal server error securitySchemes: apiKeyAuth: type: apiKey in: header name: x-api-key description: >- Identifies the partner software. Issued by Codaclean. Required on every call, including `POST /token`. bearerAuth: type: http scheme: bearer bearerFormat: JWT (Cognito ID token) description: >- Identifies the user and their accounting firm. Send the `idToken` returned by `POST /token` as `Authorization: Bearer `. Valid for 1 hour. ````