> ## Documentation Index > Fetch the complete documentation index at: https://docs.ach.netevia.com/llms.txt > Use this file to discover all available pages before exploring further. # Add bank account. ( SUNSETTING ) > Add a bank account for a specific user. **This Endpoint is Sunsetting and you should use the stable endpoint. Sunsetting APIs that are still supported but scheduled for deprecation.** ## OpenAPI ````yaml https://api.grailpay.com/docs?api-docs.json post /3p/api/v1/bank-account/{user_uuid} openapi: 3.0.0 info: title: GrailPay ACH API description: API Documentation for moving funds via ACH using the GrailPay ACH API version: 2025.12.19.2 servers: - url: https://api.grailpay.com description: Production environment - url: https://api-sandbox.grailpay.com description: Sandbox environment security: [] tags: - name: Users description: >- API Endpoints used for the onboarding and managing People, Businesses, and Merchants. - name: Transactions description: API Endpoints used for creating and managing transactions. - name: Payouts description: API Endpoints used for fetching payout information. - name: Refunds description: API Endpoints used for creating and retrieving refunds. - name: Bank Accounts description: API Endpoints used for adding and managing bank accounts. - name: Webhooks description: API Endpoints used for registering and de-registering webhooks. - name: Billing description: API Endpoints used for retrieving billing information. - name: Stable description: Stable, up-to-date APIs that are recommended for current integration. - name: Sunsetting description: Sunsetting APIs that are still supported but scheduled for deprecation. - name: Deprecated description: Deprecated APIs that are no longer supported and should be removed. - name: SUNSETTING description: SUNSETTING paths: /3p/api/v1/bank-account/{user_uuid}: post: tags: - Bank Accounts - Sunsetting summary: Add bank account. ( SUNSETTING ) description: >- Add a bank account for a specific user. **This Endpoint is Sunsetting and you should use the stable endpoint. Sunsetting APIs that are still supported but scheduled for deprecation.** operationId: b818f2802799c617fd6e3d50ac90e88f parameters: - name: user_uuid in: path description: UUID of the user required: true schema: type: string format: uuid requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/V1AddBankAccountRequest' responses: '201': description: Successful response content: application/json: schema: properties: status: type: boolean example: true message: type: string example: Bank account has been added. data: properties: uuid: type: string example: b1b9b3b0-0b3b-4b3b-8b3b-0b3b3b3b3b3b account_number: type: string example: '1234567890' routing_number: type: string example: '123456789' account_name: type: string example: John Doe account_type: type: string example: checking aggregator_type: type: string example: plaid created_at: type: string example: '2021-10-01 00:00:00' is_default: type: boolean example: true type: object errors: type: string example: null error_code: type: string example: null type: object '400': description: Bad request content: application/json: schema: properties: status: type: boolean example: false message: type: string example: >- Invalid routing_number: 000000001. This routing number has an invalid check digit. data: type: string example: null errors: type: string example: null error_code: type: string example: null type: object '401': description: Unauthorized content: application/json: schema: oneOf: - $ref: '#/components/schemas/Error401Unauthorized' - $ref: '#/components/schemas/Error401InvalidTokenStructure' - $ref: '#/components/schemas/Error401InvalidTokenData' '404': description: User not found content: application/json: schema: $ref: '#/components/schemas/BankUserNotFound' '406': description: Error content: application/json: schema: properties: status: type: boolean example: false message: type: string example: The requested billing merchant user uuid does not exist. data: type: string example: null errors: type: string example: null error_code: type: string example: null type: object '422': description: Validation Error content: application/json: schema: properties: status: type: boolean example: false message: type: string example: The given data was invalid. data: type: string example: null errors: properties: first_name: type: array items: type: string example: The account number is required. type: object error_code: type: string example: null type: object security: - ApiToken: [] components: schemas: V1AddBankAccountRequest: properties: plaid: properties: access_token: type: string example: access-token account_id: type: string example: account-id type: object custom: properties: account_number: type: string example: '12345678901234567' routing_number: type: integer example: 123456789 account_name: type: string example: John Doe account_type: type: string example: checking validate_account_routing: type: boolean example: true type: object billing_merchant_user_uuid: type: string example: a1b2c3d4-e5f6-g7h8-i9j0-k1l2m3n4o5p6 billing_processor_mid: type: string example: '1213121313' type: object Error401Unauthorized: properties: status: type: boolean example: false message: type: string example: Invalid Token data: type: string example: null errors: type: string example: null error_code: type: string example: null type: object Error401InvalidTokenStructure: properties: status: type: boolean example: false message: type: string example: >- Invalid token format. The token should be in the following format: ID|TOKEN_VALUE. Example: 12345|abcdefg data: type: string example: null errors: type: string example: null error_code: type: string example: null type: object Error401InvalidTokenData: properties: status: type: boolean example: false message: type: string example: >- Invalid token format. The ID in the token must be an integer. Example: 12345|abcdefg data: type: string example: null errors: type: string example: null error_code: type: string example: null type: object BankUserNotFound: properties: status: type: boolean example: false message: type: string example: User not found. data: type: string example: null errors: type: string example: null error_code: type: string example: null type: object securitySchemes: ApiToken: type: http description: >- Token-based authentication using Authorization: Bearer provided by the GrailPay Support Team. bearerFormat: Token scheme: bearer ````