> ## Documentation Index
> Fetch the complete documentation index at: https://docs.e6data.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Notification history

> notification history. GET /api/v1/workloads/{workload_id}/runs/{run_id}/notifications. Uses the same payload, validation, revision checks and response as the unified HTTP API.

ReferenceApplies to: Unified engine deployments

## Related guidance

[Addresses and access](https://docs.e6data.com/transformation/http/access.md) · [Request identity](https://docs.e6data.com/transformation/http/request-identity.md) · [Errors and recovery](https://docs.e6data.com/transformation/http/errors.md) · [Pagination and results](https://docs.e6data.com/transformation/http/results.md)


## OpenAPI

````yaml openapi/transformation.json GET /api/v1/workloads/{workload_id}/runs/{run_id}/notifications
openapi: 3.1.0
info:
  description: >-
    HTTP contracts for the Unified engine. Requests use the connected
    deployment's access model and configured owner. Response examples are
    illustrative; inspect your engine response in your client. SQL-managed
    secrets, credentials, streaming pipelines and maintenance run through
    session operations.
  title: Laminar Unified HTTP API
  version: v1
servers:
  - url: https://engine.example.com
    description: >-
      Example engine origin. Replace it with your deployment URL and any API
      mount prefix.
security: []
paths:
  /api/v1/workloads/{workload_id}/runs/{run_id}/notifications:
    get:
      tags:
        - Workloads
      summary: notification history
      description: >-
        notification history. GET
        /api/v1/workloads/{workload_id}/runs/{run_id}/notifications. Uses the
        same payload, validation, revision checks and response as the unified
        HTTP API.
      operationId: notification_history
      parameters:
        - in: path
          name: run_id
          required: true
          schema:
            format: uuid
            type: string
        - in: path
          name: workload_id
          required: true
          schema:
            format: uuid
            type: string
      responses:
        '200':
          content:
            application/json:
              schema:
                items:
                  $ref: '#/components/schemas/app_notifications_src_lib_rs_Delivery'
                type: array
          description: Successful response.
        default:
          content:
            application/json:
              example:
                error:
                  code: invalid_request
                  message: Check the request fields
              schema:
                $ref: '#/components/schemas/ApiError'
          description: A rejected or failed request. Inspect error.code before retrying.
components:
  schemas:
    app_notifications_src_lib_rs_Delivery:
      properties:
        attempts:
          minimum: 0
          type: integer
        event:
          $ref: '#/components/schemas/app_notifications_src_lib_rs_WorkflowEvent'
        last_error:
          anyOf:
            - type: string
            - type: 'null'
        next_attempt_unix_millis:
          type: integer
        status:
          $ref: '#/components/schemas/app_notifications_src_lib_rs_DeliveryStatus'
        subscription:
          $ref: >-
            #/components/schemas/shared_common_src_workflow_rs_NotificationSubscription
      required:
        - event
        - subscription
        - attempts
        - status
        - next_attempt_unix_millis
        - last_error
      type: object
    ApiError:
      properties:
        error:
          properties:
            code:
              type: string
            message:
              type: string
          required:
            - code
            - message
          type: object
      required:
        - error
      type: object
    app_notifications_src_lib_rs_WorkflowEvent:
      properties:
        backfill_id:
          anyOf:
            - format: uuid
              type: string
            - type: 'null'
        id:
          type: string
        kind:
          $ref: '#/components/schemas/shared_common_src_workflow_rs_WorkflowEventKind'
        occurred_at_unix_millis:
          type: integer
        run_id:
          anyOf:
            - $ref: '#/components/schemas/shared_common_src_lib_rs_WorkloadRunId'
            - type: 'null'
        task:
          anyOf:
            - type: string
            - type: 'null'
        workload_id:
          $ref: '#/components/schemas/shared_common_src_lib_rs_WorkloadId'
      required:
        - id
        - workload_id
        - run_id
        - backfill_id
        - task
        - kind
        - occurred_at_unix_millis
      type: object
    app_notifications_src_lib_rs_DeliveryStatus:
      oneOf:
        - const: pending
          type: string
        - const: in_flight
          type: string
        - const: delivered
          type: string
        - const: exhausted
          type: string
    shared_common_src_workflow_rs_NotificationSubscription:
      properties:
        channel:
          $ref: >-
            #/components/schemas/shared_common_src_workflow_rs_NotificationChannel
        events:
          items:
            $ref: >-
              #/components/schemas/shared_common_src_workflow_rs_WorkflowEventKind
          type: array
        max_attempts:
          minimum: 0
          type: integer
        name:
          type: string
      required:
        - name
        - channel
        - events
        - max_attempts
      type: object
    shared_common_src_workflow_rs_WorkflowEventKind:
      oneOf:
        - const: run_started
          type: string
        - const: run_succeeded
          type: string
        - const: run_failed
          type: string
        - const: run_cancelled
          type: string
        - const: outcome_unknown
          type: string
        - const: task_retry
          type: string
        - const: task_failed
          type: string
        - const: sensor_timeout
          type: string
        - const: backfill_completed
          type: string
        - const: backfill_failed
          type: string
    shared_common_src_lib_rs_WorkloadRunId:
      format: uuid
      type: string
    shared_common_src_lib_rs_WorkloadId:
      format: uuid
      type: string
    shared_common_src_workflow_rs_NotificationChannel:
      oneOf:
        - allOf:
            - properties:
                kind:
                  const: webhook
              required:
                - kind
              type: object
            - properties:
                secret:
                  anyOf:
                    - type: string
                    - type: 'null'
                url:
                  type: string
              required:
                - url
                - secret
              type: object
        - allOf:
            - properties:
                kind:
                  const: slack
              required:
                - kind
              type: object
            - properties:
                secret:
                  anyOf:
                    - type: string
                    - type: 'null'
                url:
                  type: string
              required:
                - url
                - secret
              type: object

````

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