Microsoft Power Platform Webhooks

generated: '2026-09-06'
method: searched
source: https://learn.microsoft.com/en-us/power-apps/developer/data-platform/use-webhooks (HTTP 200, fetched 2026-09-06)
description: >-
  Dataverse has a real, documented outbound event surface, but it is registration-driven rather
  than catalog-driven: there is no fixed list of event types a consumer subscribes to. A
  developer registers a step against any Dataverse message (Create, Update, Delete, Assign,
  custom actions) on any table, at a chosen pipeline stage, and Dataverse POSTs the execution
  context to the registered endpoint. No AsyncAPI document is published for this surface, and
  none is authored here.
asyncapi_published: false
asyncapi_note: >-
  No AsyncAPI 2.x/3.x document was found on any Microsoft host, in the microsoft GitHub org, or
  at /asyncapi.yaml on the API hosts. The webhook surface is documented in prose plus the
  RemoteExecutionContext .NET type; fabricating an AsyncAPI from that would be authoring a
  contract Microsoft does not publish.
webhooks:
  registration:
    mechanism: >-
      Register a webhook service endpoint and an sdkmessageprocessingstep, via the Plugin
      Registration Tool or the serviceendpoint table.
    docs: https://learn.microsoft.com/en-us/power-apps/developer/data-platform/register-web-hook
    scope: per-environment; there is no tenant-wide subscription API
  transport: HTTP POST
  content_type: application/json
  payload:
    schema: RemoteExecutionContext (serialized)
    reference: https://learn.microsoft.com/en-us/dotnet/api/microsoft.xrm.sdk.remoteexecutioncontext
    key_fields:
    - MessageName
    - PrimaryEntityName
    - PrimaryEntityId
    - InputParameters
    - PreEntityImages
    - PostEntityImages
    - Stage
    - Mode
    - CorrelationId
    - OrganizationId
    - InitiatingUserId
    size_limit: 256 KB
    truncation: >-
      Above 256 KB the x-ms-dynamics-msg-size-exceeded header is sent and ParentContext,
      InputParameters, PreEntityImages and PostEntityImages are stripped from the body.
  headers_sent:
  - name: x-ms-dynamics-organization
    description: Domain name of the environment sending the request.
  - name: x-ms-dynamics-entity-name
    description: Logical name of the table in the execution context.
  - name: x-ms-dynamics-request-name
    description: Name of the event the step was registered for.
  - name: x-ms-correlation-request-id
    description: Correlation id used by the platform for infinite-loop prevention and support telemetry.
  - name: x-ms-dynamics-msg-size-exceeded
    description: Present only when the payload exceeds 256 KB.
  authentication:
    options:
    - HttpHeader - caller-defined key/value pairs sent as request headers
    - WebhookKey - shared key sent on the query string
    - HttpQueryString - caller-defined query string parameters
    note: >-
      Microsoft frames this as deliberately simpler than the SAS model used for Azure Service Bus
      integration. There is no HMAC request signature and no replay nonce.
  delivery:
    modes: [synchronous, asynchronous]
    timeout: 60 seconds
    success_criteria: response StatusCode in the 2xx range; the response body is never parsed
    retry: >-
      Exactly one additional attempt, and only for 502 Bad Gateway, 503 Service Unavailable or
      504 Gateway Timeout. Every other failure - including a timeout - is terminal.
    ordering: not guaranteed
    caveat: >-
      For a synchronous step the request is sent before the transaction commits; if the operation
      later rolls back, the request already delivered cannot be recalled. This is an at-least-once
      surface with a documented phantom-event case.
  observability:
    async_failures: System Jobs record the error for asynchronous steps.
    sync_failures: The end user sees an "Endpoint unavailable" dialog with a downloadable log.
alternatives:
- name: Azure Service Bus integration
  when: high-scale event volumes needing a real queue
  limits: asynchronous only
- name: Azure Synapse Link / Fabric link for Dataverse
  when: continuous data replication rather than per-event handling
  note: Low-latency Dataverse-to-Fabric sync reached GA in June 2026 per the Power Platform blog.
- name: Power Automate triggers
  when: no-code reaction to Dataverse and connector events