generated: '2026-08-13'
method: searched
source: >-
  https://docs.dataforseo.com/v3/appendix/webhook_resend/,
  https://docs.dataforseo.com/v3/appendix/sandbox/, task_post request schemas in
  openapi/*.yml
spec_type: webhook-catalog
asyncapi_published: false
asyncapi_note: >-
  DataForSEO publishes no AsyncAPI document. It does ship a real, first-class
  webhook surface: every Standard/Priority task can nominate a callback, and
  there is a dedicated resend endpoint. This artifact captures that surface so
  the event contract is recorded even though no AsyncAPI exists. Nothing here is
  fabricated — the mechanisms below are documented by DataForSEO and are visible
  as request-body properties in the harvested specs.

model:
  style: per-task callback URLs (not a subscription registry)
  detail: >-
    There is no webhook subscription/endpoint management API. A callback is
    nominated per task, inside the task_post body, which means delivery targets
    are chosen by the caller at request time rather than configured once.
  applies_to: Standard and Priority queue tasks (Live mode returns inline and fires no callback)
  sandbox_supported: true

mechanisms:

  - id: pingback
    field: pingback_url
    direction: outbound (DataForSEO -> customer)
    payload: none (notification only)
    detail: >-
      DataForSEO calls the URL when the task completes. The caller then fetches
      the result with task_get. Supports $id and $tag placeholders in the URL,
      which DataForSEO substitutes on call.
    example_url: https://your-server.com/pingscript?id=$id&tag=$tag
    placeholders: ['$id', '$tag']

  - id: postback
    field: postback_url
    direction: outbound (DataForSEO -> customer)
    payload: the full task result, POSTed to the URL
    detail: >-
      DataForSEO delivers the result body directly, removing the polling step.
      Used together with postback_data to select the result format.
    example_url: https://your-server.com/postbackscript

  - id: postback_data
    field: postback_data
    direction: request parameter
    detail: >-
      Selects which result variant is delivered to postback_url. Values mirror
      the task_get variants for the endpoint family — e.g. `regular`, `advanced`,
      `html` for SERP endpoints.

polling_alternative:
  detail: >-
    When no postback_url is set, completed-but-uncollected tasks are discovered
    with the tasks_ready endpoints, and re-parsed tasks with tasks_fixed.
  operations:
    - {operationId: TasksReady, path: GET /v3/serp/tasks_ready, spec: openapi/dataforseo-serp-api-openapi.yml}
    - {operationId: GoogleOrganicTasksReady, path: GET /v3/serp/google/organic/tasks_ready, spec: openapi/dataforseo-serp-api-openapi.yml}
    - {operationId: GoogleOrganicTasksFixed, path: GET /v3/serp/google/organic/tasks_fixed, spec: openapi/dataforseo-serp-api-openapi.yml}
    - {operationId: OnPageTasksReady, path: GET /v3/on_page/tasks_ready, spec: openapi/dataforseo-onpage-api-openapi.yml}
    - {operationId: MerchantTasksReady, path: GET /v3/merchant/tasks_ready, spec: openapi/dataforseo-merchant-api-openapi.yml}

resend:
  operationId: WebhookResend
  path: POST /v3/appendix/webhook_resend
  spec: openapi/dataforseo-appendix-api-openapi.yml
  docs: https://docs.dataforseo.com/v3/appendix/webhook_resend/
  batch_limit: 100
  input_field: {name: id, type: string, format: UUID, note: one object per identifier in the task array}
  cost: free
  billing_note: The account is not double-charged for resending a webhook.
  detail: >-
    Replays pingbacks and postbacks for up to 100 named task ids. In the resend
    response the per-task `result` array is always null — the payload arrives via
    the original delivery method.

coverage:
  webhook_capable_request_schemas: 67
  by_api:
    - {spec: openapi/dataforseo-serp-api-openapi.yml, schemas: 27}
    - {spec: openapi/dataforseo-businessdata-api-openapi.yml, schemas: 11}
    - {spec: openapi/dataforseo-keywordsdata-api-openapi.yml, schemas: 10}
    - {spec: openapi/dataforseo-appdata-api-openapi.yml, schemas: 8}
    - {spec: openapi/dataforseo-merchant-api-openapi.yml, schemas: 6}
    - {spec: openapi/dataforseo-aioptimization-api-openapi.yml, schemas: 5}
  note: >-
    Count of components.schemas carrying a postback_url property across the 12
    harvested specs. OnPage, Backlinks, Domain Analytics, Content Analysis, Labs
    and Appendix request schemas do not expose callback fields — those families
    are predominantly live/synchronous.

security:
  signing: none documented
  authentication_of_callback: none documented
  note: >-
    No webhook signature, shared secret or HMAC header is documented. A receiver
    cannot cryptographically verify that a postback came from DataForSEO; the
    only correlation handles are the task `id` (UUID) and the caller-supplied
    `tag`. Receivers should treat the callback as a trigger and re-fetch with
    task_get over authenticated HTTPS rather than trusting the delivered body.

retry_policy:
  documented: false
  note: >-
    No automatic retry schedule is published. The manual /v3/appendix/webhook_resend
    endpoint is the documented recovery path.