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

# Empty variables recipients could fill in

> The document's variables that are empty now and that a recipient could fill in from a form — one per cell, however many places show it. `rowId` is null when the document has no row of that table yet; sending a field like that adds one.

Requires edit access.



## OpenAPI

````yaml get /signature/{documentId}/requests/fields
openapi: 3.1.0
info:
  title: HERO API
  version: current
  description: |-
    The HERO REST API.

    See https://developers.myhero.so for the rendered docs.
servers:
  - url: https://app.myhero.so
security: []
paths:
  /signature/{documentId}/requests/fields:
    get:
      tags:
        - Signatures
      summary: Empty variables recipients could fill in
      description: >-
        The document's variables that are empty now and that a recipient could
        fill in from a form — one per cell, however many places show it. `rowId`
        is null when the document has no row of that table yet; sending a field
        like that adds one.


        Requires edit access.
      operationId: listSignatureRequestFields
      parameters:
        - schema:
            type: string
            minLength: 1
          required: true
          name: documentId
          in: path
      responses:
        '200':
          description: 200 response
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      type: object
                      properties: {}
                      additionalProperties: {}
                required:
                  - data
        '403':
          description: 403 response
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                    description: |-
                      Error class name (e.g.

                      ValidationError, NotFound)
                  message:
                    type: string
                    description: Human-readable error message
                  details:
                    type: array
                    items: {}
                required:
                  - error
                  - message
      security:
        - bearerAuth: []
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: HERO personal access token

````

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