openapi: 3.2.0
info:
  title: Account and Transaction API Specification Accounts API
  description: OpenAPI for Account and Transaction API Specification
  termsOfService: https://www.openbanking.org.uk/terms
  contact:
    name: Service Desk
    email: ServiceDesk@openbanking.org.uk
  license:
    name: open-licence
    url: https://www.openbanking.org.uk/open-licence
  version: v3.1.2
servers:
- url: https://ob-ybs.api.ybs.co.uk/open-banking/v3.1/aisp
  description: Base URL declared by the provider in apis.yml (roadmap#122).
tags:
- name: Accounts
paths:
  /accounts:
    get:
      tags:
      - Accounts
      summary: Get Accounts
      operationId: GetAccounts
      parameters:
      - $ref: '#/components/parameters/x-fapi-auth-date'
      - $ref: '#/components/parameters/x-fapi-customer-ip-address'
      - $ref: '#/components/parameters/x-fapi-interaction-id'
      - $ref: '#/components/parameters/Authorization'
      responses:
        '200':
          $ref: '#/components/responses/200AccountsRead'
        '400':
          $ref: '#/components/responses/400Error'
        '401':
          $ref: '#/components/responses/401Error'
        '403':
          $ref: '#/components/responses/403Error'
        '404':
          $ref: '#/components/responses/404Error'
        '405':
          $ref: '#/components/responses/405Error'
        '406':
          $ref: '#/components/responses/406Error'
        '429':
          $ref: '#/components/responses/429Error'
        '500':
          $ref: '#/components/responses/500Error'
      security:
      - PSUOAuth2Security:
        - accounts
  /accounts/{AccountId}:
    get:
      tags:
      - Accounts
      summary: Get Accounts
      operationId: GetAccountsAccountId
      parameters:
      - $ref: '#/components/parameters/AccountId'
      - $ref: '#/components/parameters/x-fapi-auth-date'
      - $ref: '#/components/parameters/x-fapi-customer-ip-address'
      - $ref: '#/components/parameters/x-fapi-interaction-id'
      - $ref: '#/components/parameters/Authorization'
      responses:
        '200':
          $ref: '#/components/responses/200AccountsAccountIdRead'
        '400':
          $ref: '#/components/responses/400Error'
        '401':
          $ref: '#/components/responses/401Error'
        '403':
          $ref: '#/components/responses/403Error'
        '404':
          $ref: '#/components/responses/404Error'
        '405':
          $ref: '#/components/responses/405Error'
        '406':
          $ref: '#/components/responses/406Error'
        '429':
          $ref: '#/components/responses/429Error'
        '500':
          $ref: '#/components/responses/500Error'
      security:
      - PSUOAuth2Security:
        - accounts
components:
  schemas:
    OBExternalAccountIdentification4Code:
      description: Name of the identification scheme, in a coded form as published in an external list.
      type: string
      x-namespaced-enum:
      - UK.OBIE.BBAN
      - UK.OBIE.IBAN
      - UK.OBIE.PAN
      - UK.OBIE.Paym
      - UK.OBIE.SortCodeAccountNumber
    Meta:
      title: MetaData
      type: object
      description: Meta Data relevant to the payload
      properties:
        TotalPages:
          type: integer
          format: int32
        FirstAvailableDateTime:
          $ref: '#/components/schemas/ISODateTime'
        LastAvailableDateTime:
          $ref: '#/components/schemas/ISODateTime'
      additionalProperties: false
    OBAccount4Detail:
      type: object
      description: Unambiguous identification of the account to which credit and debit entries are made.
      required:
      - AccountId
      - Currency
      - AccountType
      - AccountSubType
      - Account
      properties:
        AccountId:
          $ref: '#/components/schemas/AccountId'
        Status:
          $ref: '#/components/schemas/OBAccountStatus1Code'
        StatusUpdateDateTime:
          $ref: '#/components/schemas/StatusUpdateDateTime'
        Currency:
          $ref: '#/components/schemas/ActiveOrHistoricCurrencyCode_0'
        AccountType:
          $ref: '#/components/schemas/OBExternalAccountType1Code'
        AccountSubType:
          $ref: '#/components/schemas/OBExternalAccountSubType1Code'
        Description:
          $ref: '#/components/schemas/Description_0'
        Nickname:
          $ref: '#/components/schemas/Nickname'
        Account:
          type: array
          items:
            type: object
            description: Provides the details to identify an account.
            required:
            - SchemeName
            - Identification
            properties:
              SchemeName:
                $ref: '#/components/schemas/OBExternalAccountIdentification4Code'
              Identification:
                $ref: '#/components/schemas/Identification_0'
              Name:
                $ref: '#/components/schemas/Name_0'
              SecondaryIdentification:
                $ref: '#/components/schemas/SecondaryIdentification'
        Servicer:
          $ref: '#/components/schemas/OBBranchAndFinancialInstitutionIdentification5_0'
    StatusUpdateDateTime:
      description: "Date and time at which the resource status was updated.All dates in the JSON payloads are represented in ISO 8601 date-time format. \nAll date-time fields in responses must include the timezone. An example is below:\n2017-04-05T10:43:07+00:00"
      type: string
      format: date-time
    OBReadAccount4:
      type: object
      required:
      - Data
      properties:
        Data:
          type: object
          properties:
            Account:
              type: array
              items:
                $ref: '#/components/schemas/OBAccount4'
        Links:
          $ref: '#/components/schemas/Links'
        Meta:
          $ref: '#/components/schemas/Meta'
    OBExternalAccountSubType1Code:
      description: Specifies the sub type of account (product family group).
      type: string
      enum:
      - ChargeCard
      - CreditCard
      - CurrentAccount
      - EMoney
      - Loan
      - Mortgage
      - PrePaidCard
      - Savings
    ISODateTime:
      description: "All dates in the JSON payloads are represented in ISO 8601 date-time format. \nAll date-time fields in responses must include the timezone. An example is below:\n2017-04-05T10:43:07+00:00"
      type: string
      format: date-time
    Name_0:
      description: 'The account name is the name or names of the account owner(s) represented at an account level, as displayed by the ASPSP''s online channels.

        Note, the account name is not the product name or the nickname of the account.'
      type: string
      minLength: 1
      maxLength: 70
    OBErrorResponse1:
      description: An array of detail error codes, and messages, and URLs to documentation to help remediation.
      type: object
      properties:
        Code:
          description: High level textual error code, to help categorize the errors.
          type: string
          minLength: 1
          maxLength: 40
        Id:
          description: A unique reference for the error instance, for audit purposes, in case of unknown/unclassified errors.
          type: string
          minLength: 1
          maxLength: 40
        Message:
          description: Brief Error message, e.g., 'There is something wrong with the request parameters provided'
          type: string
          minLength: 1
          maxLength: 500
        Errors:
          items:
            $ref: '#/components/schemas/OBError1'
          type: array
          minItems: 1
      required:
      - Code
      - Message
      - Errors
      additionalProperties: false
    Links:
      type: object
      description: Links relevant to the payload
      properties:
        Self:
          type: string
          format: uri
        First:
          type: string
          format: uri
        Prev:
          type: string
          format: uri
        Next:
          type: string
          format: uri
        Last:
          type: string
          format: uri
      additionalProperties: false
      required:
      - Self
    OBAccount4Basic:
      type: object
      description: Unambiguous identification of the account to which credit and debit entries are made.
      required:
      - AccountId
      - Currency
      - AccountType
      - AccountSubType
      properties:
        AccountId:
          $ref: '#/components/schemas/AccountId'
        Status:
          $ref: '#/components/schemas/OBAccountStatus1Code'
        StatusUpdateDateTime:
          $ref: '#/components/schemas/StatusUpdateDateTime'
        Currency:
          $ref: '#/components/schemas/ActiveOrHistoricCurrencyCode_0'
        AccountType:
          $ref: '#/components/schemas/OBExternalAccountType1Code'
        AccountSubType:
          $ref: '#/components/schemas/OBExternalAccountSubType1Code'
        Description:
          $ref: '#/components/schemas/Description_0'
        Nickname:
          $ref: '#/components/schemas/Nickname'
    Identification_0:
      description: Identification assigned by an institution to identify an account. This identification is known by the account owner.
      type: string
      minLength: 1
      maxLength: 256
    OBAccountStatus1Code:
      description: Specifies the status of account resource in code form.
      type: string
      enum:
      - Deleted
      - Disabled
      - Enabled
      - Pending
      - ProForma
    Identification_1:
      description: Unique and unambiguous identification of the servicing institution.
      type: string
      minLength: 1
      maxLength: 35
    ActiveOrHistoricCurrencyCode_0:
      description: "Identification of the currency in which the account is held. \nUsage: Currency should only be used in case one and the same account number covers several currencies\nand the initiating party needs to identify which currency needs to be used for settlement on the account."
      type: string
      pattern: ^[A-Z]{3,3}$
    Nickname:
      description: The nickname of the account, assigned by the account owner in order to provide an additional means of identification of the account.
      type: string
      minLength: 1
      maxLength: 70
    AccountId:
      description: A unique and immutable identifier used to identify the account resource. This identifier has no meaning to the account owner.
      type: string
      minLength: 1
      maxLength: 40
    SecondaryIdentification:
      description: "This is secondary identification of the account, as assigned by the account servicing institution. \nThis can be used by building societies to additionally identify accounts with a roll number (in addition to a sort code and account number combination)."
      type: string
      minLength: 1
      maxLength: 34
    OBExternalAccountType1Code:
      description: Specifies the type of account (personal or business).
      type: string
      enum:
      - Business
      - Personal
    OBBranchAndFinancialInstitutionIdentification5_0:
      type: object
      required:
      - SchemeName
      - Identification
      description: Party that manages the account on behalf of the account owner, that is manages the registration and booking of entries on the account, calculates balances on the account and provides information about the account.
      properties:
        SchemeName:
          $ref: '#/components/schemas/OBExternalFinancialInstitutionIdentification4Code'
        Identification:
          $ref: '#/components/schemas/Identification_1'
    OBError1:
      type: object
      properties:
        ErrorCode:
          description: Low level textual error code, e.g., UK.OBIE.Field.Missing
          type: string
          x-namespaced-enum:
          - UK.OBIE.Field.Expected
          - UK.OBIE.Field.Invalid
          - UK.OBIE.Field.InvalidDate
          - UK.OBIE.Field.Missing
          - UK.OBIE.Field.Unexpected
          - UK.OBIE.Header.Invalid
          - UK.OBIE.Header.Missing
          - UK.OBIE.Reauthenticate
          - UK.OBIE.Resource.ConsentMismatch
          - UK.OBIE.Resource.InvalidConsentStatus
          - UK.OBIE.Resource.InvalidFormat
          - UK.OBIE.Resource.NotFound
          - UK.OBIE.Rules.AfterCutOffDateTime
          - UK.OBIE.Rules.DuplicateReference
          - UK.OBIE.Signature.Invalid
          - UK.OBIE.Signature.InvalidClaim
          - UK.OBIE.Signature.Malformed
          - UK.OBIE.Signature.Missing
          - UK.OBIE.Signature.MissingClaim
          - UK.OBIE.Signature.Unexpected
          - UK.OBIE.UnexpectedError
          - UK.OBIE.Unsupported.AccountIdentifier
          - UK.OBIE.Unsupported.AccountSecondaryIdentifier
          - UK.OBIE.Unsupported.Currency
          - UK.OBIE.Unsupported.Frequency
          - UK.OBIE.Unsupported.LocalInstrument
          - UK.OBIE.Unsupported.Scheme
        Message:
          description: 'A description of the error that occurred. e.g., ''A mandatory field isn''t supplied'' or ''RequestedExecutionDateTime must be in future''

            OBIE doesn''t standardise this field'
          type: string
          minLength: 1
          maxLength: 500
        Path:
          description: Recommended but optional reference to the JSON Path of the field with error, e.g., Data.Initiation.InstructedAmount.Currency
          type: string
          minLength: 1
          maxLength: 500
        Url:
          description: URL to help remediate the problem, or provide more information, or to API Reference, or help etc
          type: string
      required:
      - ErrorCode
      - Message
      additionalProperties: false
      minProperties: 1
    OBAccount4:
      oneOf:
      - $ref: '#/components/schemas/OBAccount4Basic'
      - $ref: '#/components/schemas/OBAccount4Detail'
    Description_0:
      description: Specifies the description of the account type.
      type: string
      minLength: 1
      maxLength: 35
    OBExternalFinancialInstitutionIdentification4Code:
      description: Name of the identification scheme, in a coded form as published in an external list.
      type: string
      x-namespaced-enum:
      - UK.OBIE.BICFI
  parameters:
    x-fapi-interaction-id:
      in: header
      name: x-fapi-interaction-id
      required: false
      description: An RFC4122 UID used as a correlation id.
      schema:
        type: string
    x-fapi-auth-date:
      in: header
      name: x-fapi-auth-date
      required: false
      description: "The time when the PSU last logged in with the TPP. \nAll dates in the HTTP headers are represented as RFC 7231 Full Dates. An example is below: \nSun, 10 Sep 2017 19:43:31 UTC"
      schema:
        type: string
        pattern: ^(Mon|Tue|Wed|Thu|Fri|Sat|Sun), \d{2} (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec) \d{4} \d{2}:\d{2}:\d{2} (GMT|UTC)$
    AccountId:
      name: AccountId
      in: path
      description: AccountId
      required: true
      schema:
        type: string
    Authorization:
      in: header
      name: Authorization
      required: true
      description: An Authorisation Token as per https://tools.ietf.org/html/rfc6750
      schema:
        type: string
    x-fapi-customer-ip-address:
      in: header
      name: x-fapi-customer-ip-address
      required: false
      description: The PSU's IP address if the PSU is currently logged in with the TPP.
      schema:
        type: string
  responses:
    500Error:
      description: Internal Server Error
      headers:
        x-fapi-interaction-id:
          description: An RFC4122 UID used as a correlation id.
          schema:
            type: string
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/OBErrorResponse1'
    429Error:
      description: Too Many Requests
      headers:
        Retry-After:
          description: Number in seconds to wait
          schema:
            type: integer
        x-fapi-interaction-id:
          description: An RFC4122 UID used as a correlation id.
          schema:
            type: string
    406Error:
      description: Not Acceptable
      headers:
        x-fapi-interaction-id:
          description: An RFC4122 UID used as a correlation id.
          schema:
            type: string
    401Error:
      description: Unauthorized
      headers:
        x-fapi-interaction-id:
          description: An RFC4122 UID used as a correlation id.
          schema:
            type: string
    404Error:
      description: Not found
      headers:
        x-fapi-interaction-id:
          description: An RFC4122 UID used as a correlation id.
          schema:
            type: string
    200AccountsAccountIdRead:
      description: Accounts Read
      headers:
        x-fapi-interaction-id:
          description: An RFC4122 UID used as a correlation id.
          schema:
            type: string
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/OBReadAccount4'
    400Error:
      description: Bad request
      headers:
        x-fapi-interaction-id:
          description: An RFC4122 UID used as a correlation id.
          schema:
            type: string
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/OBErrorResponse1'
    200AccountsRead:
      description: Accounts Read
      headers:
        x-fapi-interaction-id:
          description: An RFC4122 UID used as a correlation id.
          schema:
            type: string
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/OBReadAccount4'
    403Error:
      description: Forbidden
      headers:
        x-fapi-interaction-id:
          description: An RFC4122 UID used as a correlation id.
          schema:
            type: string
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/OBErrorResponse1'
    405Error:
      description: Method Not Allowed
      headers:
        x-fapi-interaction-id:
          description: An RFC4122 UID used as a correlation id.
          schema:
            type: string
  securitySchemes:
    TPPOAuth2Security:
      type: oauth2
      description: TPP client credential authorisation flow with the ASPSP
      flows:
        clientCredentials:
          tokenUrl: https://authserver.example/token
          scopes:
            accounts: Ability to read Accounts information
    PSUOAuth2Security:
      type: oauth2
      description: OAuth flow, it is required when the PSU needs to perform SCA with the ASPSP when a TPP wants to access an ASPSP resource owned by the PSU
      flows:
        authorizationCode:
          authorizationUrl: https://authserver.example/authorization
          tokenUrl: https://authserver.example/token
          scopes:
            accounts: Ability to read Accounts information