> ## Documentation Index
> Fetch the complete documentation index at: https://docs.services.payward.com/llms.txt
> Use this file to discover all available pages before exploring further.

# List webhook attempts

> Lists delivery attempts made to this webhook, most recent first.

A delivery attempt is one HTTP POST to the webhook's destination URL. Because deliveries are retried on failure, a single emitted event can produce several attempts against the same webhook: the first is `scheduled`, and each subsequent retry is another `scheduled` attempt until the event is delivered or the retry schedule is exhausted; a partner-initiated resend produces a `manual` attempt. Every attempt is listed, so a successful delivery and the failed tries that preceded it all appear as separate entries sharing the same `message_id`.



## OpenAPI

````yaml https://d2588n1sy4m36o.cloudfront.net/uat/merged/openapi.json get /v1/webhooks/{webhook_id}/attempts
openapi: 3.1.0
info:
  title: PWS Public API
  version: '1'
  description: >-
    Integrate with Payward Services to onboard users, manage accounts and funds,
    trade assets, and receive event notifications.
  contact:
    name: Payward Services
servers:
  - url: https://api.sandbox.services.payward.com
security: []
tags:
  - name: Assets
    description: List the assets PWS is willing to swap.
    x-displayName: Assets
  - name: Conversions
    description: >-
      Rule-driven and on-demand fiat ↔ crypto value movement, including
      conversion rules and deposits.
    x-displayName: Conversions
  - name: Auto Earn
    description: >-
      Manage Auto Earn preferences and retrieve allocation and reward
      information.
    x-displayName: Auto Earn
  - name: Bonded Earn
    description: >-
      Allocate funds to and deallocate funds from bonded earn strategies, review
      allocations, and track request status.
    x-displayName: Bonded Earn
  - name: Funding
    description: >-
      Discover deposit and withdrawal options, manage deposit addresses, and
      move funds between accounts.
    x-displayName: Funding
  - name: Derivative transfers
    description: >-
      Move funds between an account's spot balance and the same owner's futures
      balance.
    x-displayName: Derivative transfers
  - name: Portfolio
    description: 'Inspect a customer''s portfolio: balances, valuations, and transactions.'
    x-displayName: Portfolio
  - name: Ramp
    description: >-
      Support Ramp flows with discovery, quotes, limits, and hosted checkout
      experiences.
    x-displayName: Ramp
  - name: Reports
    description: Settlement and reconciliation reports for the partner.
    x-displayName: Reports
  - name: Swaps
    description: Account-funded quotes that lock a price until they expire or are executed.
    x-displayName: Swaps
  - name: Onchain quotes
    description: Wallet-funded quotes that return the data needed to settle onchain.
    x-displayName: Onchain quotes
  - name: Price trigger swaps
    description: Swaps that wait for a target price before submitting a trade.
    x-displayName: Price trigger swaps
  - name: Travel Rule verifications
    description: Travel Rule address ownership verification flows.
    x-displayName: Travel Rule verifications
  - name: Users
    description: >-
      User onboarding and status flows that the partner manages.


      - **Create User** provisions an account-owned user from an external
      reference and optional email.

      - **Get User** retrieves the user's profile, verification status, and
      required actions.


      Use the returned user `id` for calls that require the user's identifier.
    x-displayName: Users
  - name: Verifications
    description: Identity verification (KYC) submission and status for end users.
    x-displayName: Verifications
  - name: Webhooks
    description: >-
      Register HTTPS destinations to receive event deliveries, rotate signing
      secrets, and inspect, update, or delete existing subscriptions. Each
      subscription is owned by the authenticated partner; deliveries are signed
      with HMAC-SHA256 and retried on transient failures.
    x-displayName: Webhooks
paths:
  /v1/webhooks/{webhook_id}/attempts:
    get:
      tags:
        - Webhooks
      summary: List webhook attempts
      description: >-
        Lists delivery attempts made to this webhook, most recent first.


        A delivery attempt is one HTTP POST to the webhook's destination URL.
        Because deliveries are retried on failure, a single emitted event can
        produce several attempts against the same webhook: the first is
        `scheduled`, and each subsequent retry is another `scheduled` attempt
        until the event is delivered or the retry schedule is exhausted; a
        partner-initiated resend produces a `manual` attempt. Every attempt is
        listed, so a successful delivery and the failed tries that preceded it
        all appear as separate entries sharing the same `message_id`.
      operationId: listWebhookAttempts
      parameters:
        - in: path
          name: webhook_id
          required: true
          schema:
            description: Identifier returned by CreateWebhook.
            type: string
            minLength: 1
            maxLength: 64
          style: simple
          example: ep_2YuTbBzs6F8XUjWk7p7uA9KNdL5
        - $ref: '#/components/parameters/Webhooks_PageSize'
        - $ref: '#/components/parameters/PageToken'
      responses:
        '200':
          description: Successful response
          headers:
            X-Trace-Id:
              $ref: '#/components/headers/TraceId'
            Strict-Transport-Security:
              $ref: '#/components/headers/StrictTransportSecurity'
            Cache-Control:
              $ref: '#/components/headers/CacheControl'
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    description: >-
                      Delivery attempts for the requested page, most recent
                      first. Always present; serialized as an empty array when
                      the webhook has no recorded attempts.
                    type: array
                    items:
                      description: >-
                        A single HTTP delivery attempt of one event to one
                        webhook.
                      title: WebhookDeliveryAttempt
                      type: object
                      properties:
                        id:
                          description: Stable identifier of this attempt.
                          type: string
                        webhook_id:
                          description: >-
                            Identifier of the webhook the attempt was delivered
                            to. Matches the `webhook_id` in the request path.
                          type: string
                        message_id:
                          description: >-
                            Identifier of the emitted message this attempt tried
                            to deliver. All attempts for the same event (the
                            first delivery and any retries) share this value.
                          type: string
                        url:
                          description: >-
                            Destination URL the attempt was POSTed to. Reflects
                            the webhook's URL at the time of the attempt.
                          type: string
                        status:
                          description: Outcome of the attempt.
                          title: WebhookDeliveryStatus
                          type: string
                          enum:
                            - success
                            - pending
                            - failed
                            - sending
                            - canceled
                        response_status_code:
                          description: >-
                            HTTP status code returned by the destination. `0`
                            when no HTTP response was received (e.g., a timeout
                            or connection error).
                          type: integer
                          format: int32
                        response_duration_ms:
                          description: Round-trip time of the attempt in milliseconds.
                          type: integer
                          format: int32
                        trigger_type:
                          description: >-
                            What caused the attempt (a scheduled delivery/retry
                            or a manual resend).
                          title: WebhookDeliveryTriggerType
                          type: string
                          enum:
                            - scheduled
                            - manual
                        timestamp:
                          $ref: '#/components/schemas/DateTime'
                          description: Time at which this delivery attempt occurred.
                        event_type:
                          $ref: '#/components/schemas/Webhooks_WebhookEventType'
                          description: >-
                            Event type of the message this attempt tried to
                            deliver. All attempts for the same `message_id`
                            share it. Absent when the recorded event type is not
                            one of the values below (e.g., an event type retired
                            after the attempt was made).
                      required:
                        - id
                        - webhook_id
                        - message_id
                        - url
                        - status
                        - response_status_code
                        - response_duration_ms
                        - trigger_type
                  next_page_token:
                    description: >-
                      Opaque token for retrieving the next page. Absent when
                      there are no more results.
                    type: string
                    minLength: 1
                    maxLength: 256
                required:
                  - data
              examples:
                list-webhook-attempts-response:
                  summary: List webhook attempts response
                  value:
                    data:
                      - id: atmpt_2Z1Tb9zs6F8XUjWk7p7uA9KNdL5
                        webhook_id: ep_2YuTbBzs6F8XUjWk7p7uA9KNdL5
                        message_id: msg_2YvQ8oP1n5qkqf3mC2vQ7rTxY
                        url: https://partner.example.com/hooks/quote
                        status: success
                        response_status_code: 200
                        response_duration_ms: 142
                        trigger_type: scheduled
                        timestamp: '2026-05-25T11:30:05Z'
        '400':
          $ref: '#/components/responses/WebhooksBadRequestResponse'
        '401':
          $ref: '#/components/responses/WebhooksUnauthenticatedResponse'
        '403':
          $ref: '#/components/responses/WebhooksForbiddenResponse'
        '404':
          description: Webhook not found
          headers:
            X-Trace-Id:
              $ref: '#/components/headers/TraceId'
            Strict-Transport-Security:
              $ref: '#/components/headers/StrictTransportSecurity'
            Cache-Control:
              $ref: '#/components/headers/CacheControl'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Webhooks_WebhookNotFoundError'
              examples:
                webhook-not-found:
                  summary: Webhook not found
                  value:
                    error:
                      type: webhooks_error
                      status: 404
                      instance: req_01H00000000000000000000000
                      code: webhook_not_found
        '429':
          $ref: '#/components/responses/WebhooksResourceExhaustedResponse'
        '500':
          $ref: '#/components/responses/WebhooksInternalResponse'
        '503':
          $ref: '#/components/responses/WebhooksUnavailableResponse'
        '504':
          $ref: '#/components/responses/WebhooksDeadlineExceededResponse'
      security:
        - ApiKey: []
          ApiSign: []
          ApiNonce: []
components:
  parameters:
    Webhooks_PageSize:
      name: page_size
      in: query
      description: >-
        Maximum number of results to return. Ignored when `page_token` is
        present.
      required: false
      schema:
        type: integer
        format: int32
        minimum: 1
        maximum: 25
        default: 20
      style: form
      example: 20
    PageToken:
      name: page_token
      in: query
      description: >-
        Opaque token returned as `next_page_token` in the previous response.
        Omit to request the first page.
      required: false
      schema:
        type: string
        minLength: 1
        maxLength: 256
      style: form
      example: MjoyRHuBXSgoe0mDHt-iFALROW46EGdvk_trgja31Vwr7H4
  headers:
    TraceId:
      description: Trace identifier for the request. Include it when contacting support.
      schema:
        type: string
        example: 4bf92f3577b34da6a3ce929d0e0e4736
    StrictTransportSecurity:
      description: Enforces HTTPS for the duration specified by `max-age`.
      schema:
        type: string
        example: max-age=31536000; includeSubDomains; preload
    CacheControl:
      description: Prevents caching of sensitive financial data. Always `no-store`.
      schema:
        type: string
        enum:
          - no-store
        example: no-store
  schemas:
    DateTime:
      description: RFC 3339 timestamp.
      type: string
      format: date-time
    Webhooks_WebhookEventType:
      title: WebhookEventType
      description: Event type supported by the webhooks API.
      type: string
      enum:
        - quote.executed
        - quote.cancelled
        - quote.execution_failed
        - user.closed
        - user.disabled
        - conversion.deposit_completed
        - conversion.deposit_failed
        - conversion.deposit_held
        - conversion.withdrawal_completed
        - conversion.withdrawal_failed
        - conversion.quote_execution_failed
        - conversion.travel_rule_blocked
        - transaction.swap
        - transaction.price_trigger_swap
        - transaction.earn_reward
        - transaction.deposit
        - transaction.withdrawal
        - transaction.transfer
        - conversion.quote_executed
        - funds.deposit_received
        - funds.deposit_held
        - funds.deposit_credited
        - funds.deposit_returned
        - funds.deposit_failed
        - verification.requirements_updated
        - verification.updated
        - price_trigger_swap.executed
        - price_trigger_swap.execution_failed
        - price_trigger_swap.cancelled
        - price_trigger_swap.created
        - price_trigger_swap.failed
        - funds.withdrawal_held
        - funds.withdrawal_complete
        - funds.withdrawal_failed
        - recurring_swap.created
        - recurring_swap.executed
        - recurring_swap.execution_failed
        - recurring_swap.cancelled
        - recurring_swap.failed
        - recurring_swap.paused
        - recurring_swap.resumed
        - transaction.recurring_swap
    Webhooks_WebhookNotFoundError:
      description: The requested webhook does not exist or is not accessible.
      allOf:
        - $ref: '#/components/schemas/PwsGeneralErrorEnvelope'
        - type: object
          required:
            - error
          properties:
            error:
              allOf:
                - $ref: '#/components/schemas/PwsGeneralError'
                - type: object
                  required:
                    - status
                    - code
                  properties:
                    status:
                      type: integer
                      format: int32
                      const: 404
                    code:
                      type: string
                      enum:
                        - webhook_not_found
    BadRequestError:
      title: Bad Request
      description: Request validation failed or the request could not be processed.
      oneOf:
        - title: Bad Request
          allOf:
            - $ref: '#/components/schemas/PwsValidationErrorEnvelope'
            - type: object
              required:
                - error
              properties:
                error:
                  allOf:
                    - $ref: '#/components/schemas/PwsValidationError'
                    - type: object
                      required:
                        - status
                        - code
                      properties:
                        status:
                          type: integer
                          format: int32
                          const: 400
                        code:
                          type: string
                          enum:
                            - bad_request
        - title: Gateway
          description: >-
            Gateway-level validation failure returned before the request reaches
            the service.
          allOf:
            - $ref: '#/components/schemas/PwsValidationErrorEnvelope'
            - type: object
              required:
                - error
              properties:
                error:
                  allOf:
                    - $ref: '#/components/schemas/PwsValidationError'
                    - type: object
                      required:
                        - status
                        - code
                      properties:
                        type:
                          type: string
                          const: service_error
                        status:
                          type: integer
                          format: int32
                          const: 400
                        code:
                          type: string
                          const: gateway
    UnauthenticatedError:
      title: Unauthenticated
      description: Authentication credentials are missing, invalid, or not accepted.
      oneOf:
        - title: Unauthenticated
          allOf:
            - $ref: '#/components/schemas/PwsGeneralErrorEnvelope'
            - type: object
              required:
                - error
              properties:
                error:
                  allOf:
                    - $ref: '#/components/schemas/PwsGeneralError'
                    - type: object
                      required:
                        - status
                        - code
                      properties:
                        status:
                          type: integer
                          format: int32
                          const: 401
                        code:
                          type: string
                          enum:
                            - unauthenticated
        - title: Gateway
          description: Authentication failure returned by the API gateway.
          allOf:
            - $ref: '#/components/schemas/PwsGeneralErrorEnvelope'
            - type: object
              required:
                - error
              properties:
                error:
                  allOf:
                    - $ref: '#/components/schemas/PwsGeneralError'
                    - type: object
                      required:
                        - status
                        - code
                      properties:
                        type:
                          type: string
                          const: service_error
                        status:
                          type: integer
                          format: int32
                          const: 401
                        code:
                          type: string
                          const: gateway
    ForbiddenError:
      title: Forbidden
      description: The caller is not allowed to perform this operation.
      oneOf:
        - title: Forbidden
          allOf:
            - $ref: '#/components/schemas/PwsGeneralErrorEnvelope'
            - type: object
              required:
                - error
              properties:
                error:
                  allOf:
                    - $ref: '#/components/schemas/PwsGeneralError'
                    - type: object
                      required:
                        - status
                        - code
                      properties:
                        status:
                          type: integer
                          format: int32
                          const: 403
                        code:
                          type: string
                          enum:
                            - forbidden
        - title: Gateway
          description: Authorization failure returned by the API gateway.
          allOf:
            - $ref: '#/components/schemas/PwsGeneralErrorEnvelope'
            - type: object
              required:
                - error
              properties:
                error:
                  allOf:
                    - $ref: '#/components/schemas/PwsGeneralError'
                    - type: object
                      required:
                        - status
                        - code
                      properties:
                        type:
                          type: string
                          const: service_error
                        status:
                          type: integer
                          format: int32
                          const: 403
                        code:
                          type: string
                          const: gateway
    PwsGeneralErrorEnvelope:
      description: Error envelope for operational or domain failures.
      type: object
      required:
        - error
      properties:
        error:
          $ref: '#/components/schemas/PwsGeneralError'
          description: General error details.
    PwsGeneralError:
      description: Standard PWS API error object for non-validation failures.
      allOf:
        - $ref: '#/components/schemas/PwsErrorBase'
        - type: object
          properties:
            causes:
              description: Additional error details, when present.
              type: array
              items:
                type: object
                additionalProperties: true
    ResourceExhaustedError:
      description: The request was rate limited or a resource quota was exhausted.
      allOf:
        - $ref: '#/components/schemas/PwsGeneralErrorEnvelope'
        - type: object
          required:
            - error
          properties:
            error:
              allOf:
                - $ref: '#/components/schemas/PwsGeneralError'
                - type: object
                  required:
                    - status
                    - code
                  properties:
                    status:
                      type: integer
                      format: int32
                      const: 429
                    code:
                      type: string
                      enum:
                        - resource_exhausted
    InternalError:
      description: An unexpected server-side error occurred.
      allOf:
        - $ref: '#/components/schemas/PwsGeneralErrorEnvelope'
        - type: object
          required:
            - error
          properties:
            error:
              allOf:
                - $ref: '#/components/schemas/PwsGeneralError'
                - type: object
                  required:
                    - status
                    - code
                  properties:
                    status:
                      type: integer
                      format: int32
                      const: 500
                    code:
                      type: string
                      enum:
                        - internal
    UnavailableError:
      description: The service is temporarily unavailable.
      allOf:
        - $ref: '#/components/schemas/PwsGeneralErrorEnvelope'
        - type: object
          required:
            - error
          properties:
            error:
              allOf:
                - $ref: '#/components/schemas/PwsGeneralError'
                - type: object
                  required:
                    - status
                    - code
                  properties:
                    status:
                      type: integer
                      format: int32
                      const: 503
                    code:
                      type: string
                      enum:
                        - unavailable
    DeadlineExceededError:
      description: The request deadline was exceeded before a response could be produced.
      allOf:
        - $ref: '#/components/schemas/PwsGeneralErrorEnvelope'
        - type: object
          required:
            - error
          properties:
            error:
              allOf:
                - $ref: '#/components/schemas/PwsGeneralError'
                - type: object
                  required:
                    - status
                    - code
                  properties:
                    status:
                      type: integer
                      format: int32
                      const: 504
                    code:
                      type: string
                      enum:
                        - deadline_exceeded
    PwsValidationErrorEnvelope:
      description: Error envelope for request validation failures.
      type: object
      required:
        - error
      properties:
        error:
          $ref: '#/components/schemas/PwsValidationError'
          description: Validation error details.
    PwsValidationError:
      description: Standard PWS API error object for request validation failures.
      type: object
      required:
        - type
        - status
        - instance
        - code
      properties:
        type:
          description: Machine-readable error class.
          type: string
        status:
          description: HTTP status code returned for this error.
          type: integer
          format: int32
        instance:
          description: Request identifier for this specific error occurrence.
          type: string
        code:
          description: Stable machine-readable error code.
          type: string
        doc_url:
          description: Optional link to documentation for this error.
          type: string
          format: uri
        causes:
          description: Validation failures that contributed to the error.
          type: array
          items:
            $ref: '#/components/schemas/PwsErrorCause'
    PwsErrorBase:
      description: Common fields present on every PWS API error object.
      type: object
      required:
        - type
        - status
        - instance
        - code
      properties:
        type:
          description: Machine-readable error class.
          type: string
        status:
          description: HTTP status code returned for this error.
          type: integer
          format: int32
        instance:
          description: Request identifier for this specific error occurrence.
          type: string
        code:
          description: Stable machine-readable error code.
          type: string
        doc_url:
          description: Optional link to documentation for this error.
          type: string
          format: uri
    PwsErrorCause:
      description: A single request validation failure.
      type: object
      required:
        - field
        - message
      properties:
        field:
          description: Dot-notation path to the offending request field.
          type: string
        message:
          description: Human-readable explanation of the failed validation rule.
          type: string
  responses:
    WebhooksBadRequestResponse:
      description: Validation error
      headers:
        X-Trace-Id:
          $ref: '#/components/headers/TraceId'
        Strict-Transport-Security:
          $ref: '#/components/headers/StrictTransportSecurity'
        Cache-Control:
          $ref: '#/components/headers/CacheControl'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/BadRequestError'
          examples:
            invalid-request:
              $ref: '#/components/examples/webhooks-bad-request'
    WebhooksUnauthenticatedResponse:
      description: Authentication failed
      headers:
        X-Trace-Id:
          $ref: '#/components/headers/TraceId'
        Strict-Transport-Security:
          $ref: '#/components/headers/StrictTransportSecurity'
        Cache-Control:
          $ref: '#/components/headers/CacheControl'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/UnauthenticatedError'
          examples:
            authentication-failed:
              $ref: '#/components/examples/webhooks-unauthenticated'
    WebhooksForbiddenResponse:
      description: Permission denied
      headers:
        X-Trace-Id:
          $ref: '#/components/headers/TraceId'
        Strict-Transport-Security:
          $ref: '#/components/headers/StrictTransportSecurity'
        Cache-Control:
          $ref: '#/components/headers/CacheControl'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ForbiddenError'
          examples:
            caller-is-not-allowed:
              $ref: '#/components/examples/webhooks-forbidden'
    WebhooksResourceExhaustedResponse:
      description: Rate limit exceeded
      headers:
        X-Trace-Id:
          $ref: '#/components/headers/TraceId'
        Strict-Transport-Security:
          $ref: '#/components/headers/StrictTransportSecurity'
        Cache-Control:
          $ref: '#/components/headers/CacheControl'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ResourceExhaustedError'
          examples:
            rate-limit-exceeded:
              $ref: '#/components/examples/webhooks-resource-exhausted'
    WebhooksInternalResponse:
      description: Internal server error
      headers:
        X-Trace-Id:
          $ref: '#/components/headers/TraceId'
        Strict-Transport-Security:
          $ref: '#/components/headers/StrictTransportSecurity'
        Cache-Control:
          $ref: '#/components/headers/CacheControl'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/InternalError'
          examples:
            internal-error:
              $ref: '#/components/examples/webhooks-internal'
    WebhooksUnavailableResponse:
      description: Service unavailable
      headers:
        X-Trace-Id:
          $ref: '#/components/headers/TraceId'
        Strict-Transport-Security:
          $ref: '#/components/headers/StrictTransportSecurity'
        Cache-Control:
          $ref: '#/components/headers/CacheControl'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/UnavailableError'
          examples:
            service-unavailable:
              $ref: '#/components/examples/webhooks-service-unavailable'
    WebhooksDeadlineExceededResponse:
      description: Deadline exceeded
      headers:
        X-Trace-Id:
          $ref: '#/components/headers/TraceId'
        Strict-Transport-Security:
          $ref: '#/components/headers/StrictTransportSecurity'
        Cache-Control:
          $ref: '#/components/headers/CacheControl'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/DeadlineExceededError'
          examples:
            request-deadline-exceeded:
              $ref: '#/components/examples/webhooks-deadline-exceeded'
  examples:
    webhooks-bad-request:
      summary: Invalid request
      value:
        error:
          type: webhooks_error
          instance: req_01H00000000000000000000000
          status: 400
          code: bad_request
          causes:
            - field: page_size
              message: must be between 1 and 25
    webhooks-unauthenticated:
      summary: Authentication failed
      value:
        error:
          type: webhooks_error
          instance: req_01H00000000000000000000000
          status: 401
          code: unauthenticated
    webhooks-forbidden:
      summary: Caller is not allowed
      value:
        error:
          type: webhooks_error
          instance: req_01H00000000000000000000000
          status: 403
          code: forbidden
    webhooks-resource-exhausted:
      summary: Rate limit exceeded
      value:
        error:
          type: webhooks_error
          instance: req_01H00000000000000000000000
          status: 429
          code: resource_exhausted
    webhooks-internal:
      summary: Internal error
      value:
        error:
          type: webhooks_error
          instance: req_01H00000000000000000000000
          status: 500
          code: internal
    webhooks-service-unavailable:
      summary: Service unavailable
      value:
        error:
          type: webhooks_error
          instance: req_01H00000000000000000000000
          status: 503
          code: unavailable
    webhooks-deadline-exceeded:
      summary: Request deadline exceeded
      value:
        error:
          type: webhooks_error
          instance: req_01H00000000000000000000000
          status: 504
          code: deadline_exceeded
  securitySchemes:
    ApiKey:
      type: apiKey
      in: header
      name: API-Key
      description: Your public API key. Identifies the partner making the request.
    ApiSign:
      type: apiKey
      in: header
      name: API-Sign
      description: HMAC signature over the request, computed with your private key.
    ApiNonce:
      type: apiKey
      in: header
      name: API-Nonce
      description: Monotonically increasing nonce included in the request signature.

````