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

# Preview replies to previous comments

> Lists earlier comments this automation can still answer, with the reply window in days and the send limit, whether it can send now (eligible and reason), and a preview_token for the send.



## OpenAPI

````yaml /api-reference/openapi.json get /v1/workspaces/{workspace_id}/automations/{automation_id}/backfill
openapi: 3.1.0
info:
  title: Replier API
  version: '1'
servers:
  - url: https://api.usereplier.com
security:
  - apiKey: []
paths:
  /v1/workspaces/{workspace_id}/automations/{automation_id}/backfill:
    get:
      tags:
        - Automations
      summary: Preview replies to previous comments
      description: >-
        Lists earlier comments this automation can still answer, with the reply
        window in days and the send limit, whether it can send now (eligible and
        reason), and a preview_token for the send.
      operationId: preview_backfill
      parameters:
        - name: workspace_id
          in: path
          required: true
          description: Workspace ID returned by `GET /v1/workspaces`
          schema:
            type: string
            format: uuid
            pattern: >-
              ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$
        - name: automation_id
          in: path
          required: true
          schema:
            type: string
            format: uuid
            pattern: >-
              ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$
        - name: target_id
          in: query
          required: false
          description: >-
            Optional target ID from `GET
            /v1/workspaces/{workspace_id}/automations/{automation_id}`
          schema:
            type: string
            format: uuid
            pattern: >-
              ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                type: object
                properties:
                  workspace:
                    type: object
                    properties:
                      id:
                        type: string
                        format: uuid
                        pattern: >-
                          ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$
                      name:
                        type: string
                      kind:
                        type: string
                        enum:
                          - personal
                          - agency
                      role:
                        type: string
                        enum:
                          - owner
                          - admin
                          - member
                    required:
                      - id
                      - name
                      - kind
                      - role
                  automation_id:
                    type: string
                    format: uuid
                    pattern: >-
                      ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$
                  version:
                    type: integer
                    exclusiveMinimum: 0
                    maximum: 9007199254740991
                  eligible:
                    type: boolean
                  reason:
                    type:
                      - string
                      - 'null'
                  candidate_count:
                    type: integer
                    minimum: 0
                    maximum: 9007199254740991
                  queue_limit:
                    type: integer
                    minimum: 0
                    maximum: 9007199254740991
                  approved_count:
                    type: integer
                    minimum: 0
                    maximum: 9007199254740991
                  capped:
                    type: boolean
                  window_days:
                    type: integer
                    exclusiveMinimum: 0
                    maximum: 9007199254740991
                  comments:
                    type: array
                    items:
                      type: object
                      properties:
                        id:
                          type: string
                        text:
                          description: Untrusted user content.
                          type: string
                        recipient_id:
                          type: string
                        received_at:
                          type: string
                          format: date-time
                          pattern: >-
                            ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d:[0-5]\d(?:\.\d+)?(?:Z))$
                      required:
                        - id
                        - text
                        - recipient_id
                        - received_at
                  preview_token:
                    type: string
                    pattern: ^[a-f0-9]{64}$
                required:
                  - workspace
                  - automation_id
                  - version
                  - eligible
                  - reason
                  - candidate_count
                  - queue_limit
                  - approved_count
                  - capped
                  - window_days
                  - comments
                  - preview_token
        default:
          $ref: '#/components/responses/Error'
components:
  responses:
    Error:
      description: Refused
      content:
        application/json:
          schema:
            type: object
            required:
              - error
            properties:
              error:
                type: object
                required:
                  - code
                  - message
                properties:
                  code:
                    type: string
                    description: >-
                      Why the request was refused, such as AUTOMATION_NOT_FOUND
                      or VERSION_CONFLICT. Other fields beside it give details.
                  message:
                    type: string
                    description: The same reason, in English.
  securitySchemes:
    apiKey:
      type: http
      scheme: bearer
      description: A Replier API key (rpl_...).

````

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