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

# Envelope Custom Field



## OpenAPI

````yaml /actionkit/openapi.json POST /projects/{project_id}/tools/#DOCUSIGN_ENVELOPE_CUSTOM_FIELD
openapi: 3.0.0
info:
  title: ActionKit Tools API
  version: 1.0.0
servers:
  - url: https://actionkit.useparagon.com
    description: US Cloud
security: []
paths:
  /projects/{project_id}/tools/#DOCUSIGN_ENVELOPE_CUSTOM_FIELD:
    post:
      summary: Envelope Custom Field
      parameters:
        - name: project_id
          in: path
          required: true
          schema:
            type: string
            description: >-
              Your Paragon Project ID. You can copy your Project ID from your
              dashboard URL or by clicking Copy Project ID under the Environment
              switcher.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                tool:
                  type: string
                  default: DOCUSIGN_ENVELOPE_CUSTOM_FIELD
                parameters:
                  type: object
                  properties:
                    envelopeId:
                      type: string
                      description: >-
                        Envelope ID (example:
                        "93be49ab-xxxx-xxxx-xxxx-f752070d71ec")
                    envelopeCustomFieldOperation:
                      type: string
                      description: 'Operation : To perform execution based on Operation.'
                      enum:
                        - get
                        - post
                        - put
                        - delete
                    listCustomFields:
                      type: object
                      description: |-
                        List Custom Fields (example: "[
                          {
                            "listItems": [
                              "string"
                            ],
                            "fieldId": "string",
                            "name": "string"
                          }
                        ]")
                      properties: {}
                    textCustomFields:
                      type: object
                      description: |-
                        Text Custom Fields (example: "[
                          {
                            "fieldId": "string",
                            "name": "string",
                            "show": "boolean"
                          }
                        ]")
                      properties: {}
                  required:
                    - envelopeId
                    - envelopeCustomFieldOperation
                  x-integration: docusign
              required:
                - tool
                - parameters
      responses:
        '200':
          description: Success
      security:
        - BearerAuth: []
components:
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: >-
        Your [Paragon User
        Token](/getting-started/installing-the-connect-sdk#setup) (JWT), which
        you can generate using your project's signing keys.

````