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OpenAPI Specification

openapi: 3.2.0
info:
  title: Check Services Image Check API
  description: Use the Check Services API to place a stop payment on commercial checking accounts or retrieve check details with the option to include check image.
  contact:
    name: KeyBank Developer Support
    email: embedded_banking_support@keybank.com
  version: 1.1.1
servers:
- url: https://partner-api-qv.key.com
- url: https://partner-api.key.com
security:
- bearerAuth: []
tags:
- name: ImageCheck
  description: List check images
paths:
  /commercial/checks/v1/images/list:
    post:
      tags:
      - ImageCheck
      summary: List of check images
      operationId: CheckImageListRequest
      description: Get check data with an account number and check number. To return a check image, define the image format in the request.
      security:
      - bearerAuth: []
      parameters:
      - name: X-CorrelationId
        in: header
        schema:
          type: string
        required: false
        description: A unique identifier generated for each transaction that remains with the transaction through the chain of API operations.
      requestBody:
        required: true
        description: Check image list request parameters
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CheckImageListRequest'
            examples:
              CheckListWithImage:
                summary: Check List Search with Image retrieval
                value:
                  accountNumber: '12345678910'
                  checkNumber: 123
                  checkAmount: 111.11
                  checkProcessDate: '2026-01-27'
                  imageFormat: PNG
              CheckListWithoutImage:
                summary: Check List Search without Image retrieval
                value:
                  accountNumber: '12345678910'
                  checkNumber: 123
                  checkAmount: 111.11
                  checkProcessDate: '2026-01-27'
      responses:
        '200':
          description: Successful response
          headers:
            X-CorrelationId:
              schema:
                type: string
              description: A unique identifier generated for each transaction that remains with the transaction through the chain of API operations.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CheckImageListResponse'
              examples:
                CheckListWithImage:
                  summary: Check List Search with Image retrieval
                  value:
                    checkImages:
                      accountNumber: '12345678910'
                      checkNumber: 123
                      checkAmount: 111.11
                      checkProcessDate: '2026-01-27'
                      sequenceNumber: 1
                      transactionType: DEBIT
                      checkRoutingNumber: '04120704'
                      checkFrontImage: lUwXMGBwTm4dy/5pe8GwlRZULmMfPkzL8yZKfDxRTU7HFMW/b7DYqjBq0vyC85PxMObQ2UxtcbVe78MWsdgIBkKY7pCB4eE7GQr9QOcFRW2O7FQshj8ExEy0bmCV8cQFyxzKh04XPWIDxp71PIw/BFWy2GG+R3b1SFP/Mbj0Hdppoxn+rUxAz7Red+39BodSSz1xZteU8hu6fYvvNmbqasZmkVAEE6hS2H+3uVKqaMmnpHJ2oIie0rtowueFradOWhNGvV5pRuEhEd6j93X/7mt=
                      checkRearImage: 73mfoZbjXF4Gr9XuIYSieWR0o3NV2bvMcwiurzvU8Dyvy2CG+1DYdw3IyHHZRdY6CKiarVFK7mG+IgJKVaDwqA2Ma7YxopwgEIJ5oc8gS/O8BzX7zms/6hmRn9wrcZj3ZhaSUmAdOtSc3qOzp6JPLoYyJg2hQwnEtJyormF8GT5ajF8ADV6XQD+d3Ym8bKsR6rHWwGB0bmiKu+9r+33mR8QZmzmmCPIUZXzj6CXaLr0dNA4+xXszgMbWAHI00ZGhTsSfzyWp8FHYZx24fbEOkS9ApuVBRihL+Eb14ldJayOgAXI3OjLJgo2pB4EUvbQmhwu=
                CheckListWithoutImage:
                  summary: Check List Search without Image retrieval
                  value:
                    checkImages:
                      accountNumber: '12345678910'
                      checkNumber: 123
                      checkAmount: 111.11
                      checkProcessDate: '2026-01-27'
                      sequenceNumber: 1
                      transactionType: DEBIT
                      checkRoutingNumber: '04120704'
        '400':
          description: Validation failure on request payload
          headers:
            X-CorrelationId:
              schema:
                type: string
              description: A unique identifier generated for each transaction that remains with the transaction through the chain of API operations.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Exception'
              example:
                ErrorMessage: Error received from backend service
                TransactionId: 84293235-5d2c-42ba-afc3-a5d4afc5f88e27097
                X-CorrelationId: 929618f2-6163-bf73-51b0-6c54a8533c74
                TransactionTime: '2021-06-11T16:31:34.041Z'
                Api-Url: /commercial/checks/v1/images/list
                ServiceError:
                  metadata:
                    messages:
                    - code: IMAGE-Check-400-accountNumber
                      message: accountNumber must be numeric
        '401':
          description: Unauthorized request
          headers:
            X-CorrelationId:
              schema:
                type: string
              description: A unique identifier generated for each transaction that remains with the transaction through the chain of API operations.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Exception'
              example:
                ErrorMessage: Received request is unauthorized, please provide valid credentials
                TransactionId: 0635f201-8fbb-418f-b93a-138d5103e2b91348
                X-CorrelationId: 929618f2-6163-bf73-51b0-6c54a8533c74
                TransactionTime: '2021-06-11T16:31:34.041Z'
                Api-Url: /commercial/checks/v1/images/list
        '403':
          description: Entitlements validation failed
          headers:
            X-CorrelationId:
              schema:
                type: string
              description: A unique identifier generated for each transaction that remains with the transaction through the chain of API operations.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Exception'
              example:
                ErrorMessage: Error received from backend service
                TransactionId: 84293235-5d2c-42ba-afc3-a5d4afc5f88e27097
                X-CorrelationId: 929618f2-6163-bf73-51b0-6c54a8533c74
                TransactionTime: '2021-06-11T16:31:34.041Z'
                Api-Url: /commercial/checks/v1/images/list
                ServiceError:
                  metadata:
                    messages:
                    - code: Forbidden
                      message: Entitlements Validation Failed
        '404':
          description: Resource not found
          headers:
            X-CorrelationId:
              schema:
                type: string
              description: A unique identifier generated for each transaction that remains with the transaction through the chain of API operations.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Exception'
              example:
                ErrorMessage: Error received from backend service
                TransactionId: 84293235-5d2c-42ba-afc3-a5d4afc5f88e27097
                X-CorrelationId: 929618f2-6163-bf73-51b0-6c54a8533c74
                TransactionTime: '2021-06-11T16:31:34.041Z'
                Api-Url: /commercial/checks/v1/images/list
                ServiceError:
                  metadata:
                    messages:
                    - code: IMAGE-Check-404-Not-Found
                      message: No static resource v1/images/list
        '405':
          description: Requested method denied
          headers:
            X-CorrelationId:
              schema:
                type: string
              description: A unique identifier generated for each transaction that remains with the transaction through the chain of API operations.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Exception'
              example:
                ErrorMessage: Error received from backend service
                TransactionId: 84293235-5d2c-42ba-afc3-a5d4afc5f88e27097
                X-CorrelationId: 929618f2-6163-bf73-51b0-6c54a8533c74
                TransactionTime: '2021-06-11T16:31:34.041Z'
                Api-Url: /commercial/checks/v1/images/list
                ServiceError:
                  metadata:
                    messages:
                    - code: IMAGE-Check-405-Method-Not-Allowed
                      message: Method 'Get' is not supported.
        '415':
          description: Media type not supported
          headers:
            X-CorrelationId:
              schema:
                type: string
              description: A unique identifier generated for each transaction that remains with the transaction through the chain of API operations.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Exception'
              example:
                ErrorMessage: Error received from backend service
                TransactionId: 84293235-5d2c-42ba-afc3-a5d4afc5f88e27097
                X-CorrelationId: 929618f2-6163-bf73-51b0-6c54a8533c74
                TransactionTime: '2021-06-11T16:31:34.041Z'
                Api-Url: /commercial/checks/v1/images/list
                ServiceError:
                  metadata:
                    messages:
                    - code: IMAGE-Check-415-Unsupported-Media-Type
                      message: Content-Type 'X' is not supported.
        '429':
          description: Too many requests
          headers:
            X-CorrelationId:
              schema:
                type: string
              description: A unique identifier generated for each transaction that remains with the transaction through the chain of API operations.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Exception'
              example:
                ErrorMessage: Number requests threshold reached, please resubmit the request after sometime
                TransactionId: 84293235-5d2c-42ba-afc3-a5d4afc5f88e27097
                X-CorrelationId: 929618f2-6163-bf73-51b0-6c54a8533c74
                TransactionTime: '2021-06-11T16:31:34.041Z'
                Api-Url: /commercial/checks/v1/stops/place
        '500':
          description: Unexpected server error
          headers:
            X-CorrelationId:
              schema:
                type: string
              description: A unique identifier generated for each transaction that remains with the transaction through the chain of API operations.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Exception'
              example:
                ErrorMessage: Error received from backend
                TransactionId: 84293235-5d2c-42ba-afc3-a5d4afc5f88e27097
                TransactionTime: '2021-06-11T16:31:34.041Z'
                X-CorrelationId: 929618f2-6163-bf73-51b0-6c54a8533c74
                Api-Url: /commercial/checks/v1/images/list
                ServiceError:
                  metadata:
                    messages:
                    - code: IMAGE-Check-500-error
                      message: Unable to process the request.
        '502':
          description: Bad gateway
          headers:
            X-CorrelationId:
              schema:
                type: string
              description: A unique identifier generated for each transaction that remains with the transaction through the chain of API operations.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Exception'
              example:
                ErrorMessage: Error received from backend
                TransactionId: 84293235-5d2c-42ba-afc3-a5d4afc5f88e27097
                TransactionTime: '2021-06-11T16:31:34.041Z'
                X-CorrelationId: 929618f2-6163-bf73-51b0-6c54a8533c74
                Api-Url: /commercial/checks/v1/images/list
                ServiceError:
                  ConnectError: Connectivity error occurred with the downstream service (Unexpected EOF at target), please check with application support team before resubmitting the request
        '503':
          description: Service unavailable
          headers:
            X-CorrelationId:
              schema:
                type: string
              description: A unique identifier generated for each transaction that remains with the transaction through the chain of API operations.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Exception'
              examples:
                SystemDown:
                  summary: Service unavailable
                  value:
                    ErrorMessage: Error received from backend
                    TransactionId: 84293235-5d2c-42ba-afc3-a5d4afc5f88e27097
                    X-CorrelationId: 929618f2-6163-bf73-51b0-6c54a8533c74
                    TransactionTime: '2021-06-11T16:31:34.041Z'
                    Api-Url: /commercial/checks/v1/images/list
                    ServiceError:
                      ConnectError: Service is currently unavailable (NoActiveTargets), please check with application support before resubmitting the request.
        '504':
          description: Gateway timeout
          headers:
            X-CorrelationId:
              schema:
                type: string
              description: A unique identifier generated for each transaction that remains with the transaction through the chain of API operations.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Exception'
              example:
                ErrorMessage: Error received from backend
                TransactionId: 84293235-5d2c-42ba-afc3-a5d4afc5f88e27097
                X-CorrelationId: 929618f2-6163-bf73-51b0-6c54a8533c74
                TransactionTime: '2021-06-11T16:31:34.041Z'
                Api-Url: /commercial/checks/v1/images/list
                ServiceError:
                  ConnectError: Request could not be processed on time (GatewayTimeout), please wait a moment and resubmit the request.
components:
  schemas:
    ConnectError:
      type: object
      properties:
        ConnectError:
          type: string
          description: API connectivity error information, if available.
    CheckImage:
      type: object
      description: Check image record.
      properties:
        accountNumber:
          type: string
          description: Account number related to the check holder.
          examples:
          - '1234567890'
        checkNumber:
          type: integer
          description: Check number associated with the check image.
          minimum: 1
          maximum: 99999999999
          examples:
          - 123
        checkAmount:
          type: number
          format: double
          description: Amount of the check provided.
          examples:
          - 12.1
          - 1224234
          - 0.57
        checkProcessDate:
          type: string
          format: date
          description: Check process date (YYYY-MM-DD).
        sequenceNumber:
          type: integer
          description: System generated sequence number.
          examples:
          - 1
        transactionType:
          type: string
          description: Type of transaction for the check.
          examples:
          - DEBIT
        checkRoutingNumber:
          type: string
          description: Routing number on the check.
          examples:
          - '04120704'
        checkFrontImage:
          type: string
          description: The Base64 encoded string for the front image of the check.
          examples:
          - lUwXMGBwTm4dy/5pe8GwlRZULmMfPkzL8yZKfDxRTU7HFMW/b7DYqjBq0vyC85PxMObQ2UxtcbVe78MWsdgIBkKY7pCB4eE7GQr9QOcFRW2O7FQshj8ExEy0bmCV8cQFyxzKh04XPWIDxp71PIw/BFWy2GG+R3b1SFP/Mbj0Hdppoxn+rUxAz7Red+39BodSSz1xZteU8hu6fYvvNmbqasZmkVAEE6hS2H+3uVKqaMmnpHJ2oIie0rtowueFradOWhNGvV5pRuEhEd6j93X/7mt=
        checkRearImage:
          type: string
          description: The Base64 encoded string for the back image of the check.
          examples:
          - 73mfoZbjXF4Gr9XuIYSieWR0o3NV2bvMcwiurzvU8Dyvy2CG+1DYdw3IyHHZRdY6CKiarVFK7mG+IgJKVaDwqA2Ma7YxopwgEIJ5oc8gS/O8BzX7zms/6hmRn9wrcZj3ZhaSUmAdOtSc3qOzp6JPLoYyJg2hQwnEtJyormF8GT5ajF8ADV6XQD+d3Ym8bKsR6rHWwGB0bmiKu+9r+33mR8QZmzmmCPIUZXzj6CXaLr0dNA4+xXszgMbWAHI00ZGhTsSfzyWp8FHYZx24fbEOkS9ApuVBRihL+Eb14ldJayOgAXI3OjLJgo2pB4EUvbQmhwu=
    Message:
      type: object
      description: Field-level error or informational message.
      properties:
        code:
          type: string
          description: Machine-readable code.
          examples:
          - IMAGE-Check-200-Success
        message:
          type: string
          description: Human-readable message associated with the code.
          examples:
          - Successfully retrieved records.
    CheckImageListRequest:
      type: object
      description: Request to retrieve check image records for an account.
      required:
      - accountNumber
      - checkNumber
      - checkProcessDate
      properties:
        accountNumber:
          type: string
          description: Account number related to the check holder. This is a numeric ID and should not exceed 16 characters.
          maxLength: 16
          examples:
          - '1234567890'
        checkNumber:
          type: integer
          format: int64
          description: The number of the check to retrieve. This is a numeric ID.
          examples:
          - 8675309
        checkAmount:
          type: number
          format: double
          description: The amount of the check. Must be a valid monetary value with no more than two decimal places.
          examples:
          - '111.11'
        checkProcessDate:
          type: string
          description: 'The date the check was processed. Format: YYYY-MM-DD'
          examples:
          - '2026-02-14'
        imageFormat:
          type: string
          enum:
          - TIFF
          - TIF
          - PNG
          - BMP
          - JPEG
          - TIFG_4
          description: 'Indicates the output format of the check images. If no format is defined, no image is returned. Valid values: BMP, JPEG, PNG, TIF, TIFF, TIFG_4'
    ResponseMetadata:
      type: object
      description: Error metadata including validation or service messages.
      properties:
        messages:
          type: array
          maxItems: 100
          description: List of messages describing validation errors or other informational messages.
          items:
            $ref: '#/components/schemas/Message'
    ServiceErrorData:
      type: object
      title: serviceErrorData
      description: Detailed service-level error information, if available.
      properties:
        metadata:
          $ref: '#/components/schemas/ResponseMetadata'
    Exception:
      type: object
      description: Contains information about errors related to the request.
      title: exceptionSchema
      properties:
        ErrorMessage:
          type: string
          description: A human-readable message that describes the type or source of the error.
        TransactionId:
          type: string
          description: A unique transaction ID returned with the response, useful for traceability.
        X-CorrelationId:
          type: string
          description: A unique identifier generated for each transaction that remains with the transaction through the chain of API operations.
        TransactionTime:
          type: string
          format: date-time
          description: Date and time the error occurred.
        Api-Url:
          type: string
          description: The API URL path of the call that generated the response.
        ServiceError:
          type: object
          title: ServiceError
          description: Detailed service-level error details, if available.
          oneOf:
          - $ref: '#/components/schemas/ServiceErrorData'
          - $ref: '#/components/schemas/ConnectError'
    CheckImageListResponse:
      type: object
      description: Check Image list response.
      properties:
        checkImages:
          $ref: '#/components/schemas/CheckImage'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: 'Access token supplied in the `Authorization` header using the `Bearer` scheme (e.g. `Authorization: Bearer {token}`).'