KeyBank Check Services API

openapi: 3.1.0
info:
#---------------------------------------------------
# Information to contact the API provider
#---------------------------------------------------
  title: Check Services
  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:
#---------------------------------------------------
# List of environments for the API
#---------------------------------------------------
# Non-Production environment URL (QV)
- url: https://partner-api-qv.key.com
# Production and Simulator environment URL
- url: https://partner-api.key.com
tags:
- name: StopPayments
  description: Place new stop payments
- name: ImageCheck
  description: List check images
- name: HealthCheck       
  description: Verify you can connect to the API service.
paths:
#---------------------------------------------------
# List of API flows
#---------------------------------------------------
  /commercial/checks/v1/stops/place:
    post:
      tags:
      - StopPayments
      summary: Place a stop payment
      operationId: PlaceStopPayments
      description: Places a stop payment for an account using  an account number and check number. You can only stop a payment between the hours of 06:00 a.m. and 11:59 p.m. EST.
      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: Request parameters to place stop payment requests.
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/StopPaymentPlaceRequest'
            examples:
              StopPlacedSingleCheck:
                summary: Stop Place Request Single Check
                value:
                  accountNumber: '12345678910'
                  checkAmount: 12.12
                  issueDate: '2026-02-14'
                  checkNumberStart: 8940
                  description: Stop payment for issued check number
              StopPlacedCheckRange:
                summary: Stop Place Request Check Range
                value:
                  accountNumber: '12345678910'
                  checkAmount: 12.12
                  issueDate: '2026-02-14'
                  checkNumberStart: 8940
                  checkNumberEnd: 8963
                  description: Stop payment for issued check range
      responses:
        '200':
          description: Successful response with stop payment records
          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/StopPaymentPlaceResponse'
              examples:
                StopPlaced:
                  summary: Successful Stop Placed Response
                  value:
                    stopPayments:
                      accountNumber: '12345678910'
                      checkNumberStart: 8940
                      checkNumberEnd: 8963
                      checkAmount: 12.1
                      expirationDate: '2026-09-14'
                      description: Stop payment for issued check range
                      placedDate: '2026-03-14'
                      issueDate: '2026-02-14'
        '202':
          description: The stop payment request was accepted and submitted for processing, but final confirmation was not available before the response timeout. Do not assume the request failed and there is not a need to immediately resubmit the same stop payment request. The original request may still complete successfully. If the same request is submitted again after processing completes, the API will return a 409 Duplicate Stop response indicating the first request completed successfully.  Retain the X-CorrelationId for tracking or support.
          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:
                type: object
                properties:
                  metadata:
                    $ref: '#/components/schemas/ResponseMetadata'
              example:
                metadata:
                  messages:
                  - code: STOP-Place-202-processing
                    message: Your request for placing a stop is accepted and is still being processed.
        '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/stops/place
                ServiceError:
                  metadata:
                    messages:
                    - code: STOP-Place-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/stops/place
        '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/stops/place
                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/stops/place
                ServiceError:
                  metadata:
                    messages:
                    - code: STOP-Place-404-Not-Found
                      message: No static resource v1/stops/place
        '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/stops/place
                ServiceError:
                  metadata:
                    messages:
                    - code: STOP-Place-405-Method-Not-Allowed
                      message: Method 'Get' is not supported.
        '409':
          description: Duplicate stop
          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/stops/place
                ServiceError:
                  metadata:
                    messages:
                    - code: STOP-Place-409-duplicate
                      message: A Stop Payment already exists for the requested check(s)
        '412':
          description: Precondition 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/stops/place
                ServiceError:
                  metadata:
                    messages:
                    - code: STOP-Place-412-accountNumber
                      message: Invalid Account
        '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/stops/place
                ServiceError:
                  metadata:
                    messages:
                    - code: STOP-Place-415-Unsupported-Media-Type
                      message: Content-Type 'X' is not supported.
        '422':
          description: Unexpected backend 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 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/stops/place
                ServiceError:
                  metadata:
                    messages:
                    - code: STOP-Place-422-error
                      message: Unable to place the requested Stop Payment.
        '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/stops/place
                ServiceError:
                  metadata:
                    messages:
                    - code: STOP-Place-500-error
                      message: Unable to place the requested Stop Payment.
        '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/stops/place
                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/stops/place
                    ServiceError:
                      ConnectError: Service is currently unavailable (NoActiveTargets), please check with application support before resubmitting the request.
                SystemDownBatch:
                  summary: Scheduled System Outage
                  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/stops/place
                    ServiceError:
                      metadata:
                        messages:
                        - code: STOP-Place-503-error
                          message: Stop Payment API is unavailable.  Please retry
                            later.
        '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/stops/place
                ServiceError:
                  ConnectError: Request could not be processed on time (GatewayTimeout), please wait a moment and resubmit the request.
  /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:
                      

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# Full source: https://raw.githubusercontent.com/api-evangelist/keycorp/refs/heads/main/openapi/keycorp-check-services-openapi.yml