---
updatedAt: 2025-08-08T16:27:22.000Z
agentTools:
  projectIndex: https://sectigoweb.dev/llms.txt
---

# Add Add-on Plan

Add new add-on plan to user. These plans can do things like add extra storage or turn on feature like on-demand backup.

Note that the add-on plans must be linked to a base plan. Check with support or your account manager for a list of compatible plans.

# OpenAPI definition

```json
{
  "openapi": "3.1.0",
  "info": {
    "title": "users",
    "version": "2.0"
  },
  "servers": [
    {
      "url": "https://platform.sectigo.com/users"
    }
  ],
  "components": {
    "securitySchemes": {
      "sec0": {
        "type": "apiKey",
        "in": "query",
        "name": "api_key",
        "x-default": "KEY"
      }
    }
  },
  "security": [
    {
      "sec0": []
    }
  ],
  "paths": {
    "/{id}/plan/addons": {
      "post": {
        "description": "",
        "operationId": "post_{id}planaddons",
        "responses": {
          "200": {
            "description": "OK",
            "content": {
              "application/json": {
                "examples": {
                  "Result": {
                    "value": {
                      "message": "Storage quota incremented successfully. New quota: 15GB"
                    }
                  }
                }
              }
            }
          },
          "400": {
            "description": "Bad Request",
            "content": {
              "application/json": {
                "examples": {
                  "Result": {
                    "value": {
                      "error": {
                        "message": "Add-on plan not available for current plan"
                      }
                    },
                    "summary": "Result"
                  }
                }
              }
            }
          }
        },
        "parameters": [
          {
            "in": "path",
            "name": "id",
            "schema": {
              "type": "integer",
              "format": "int32"
            },
            "required": true
          }
        ],
        "security": [
          {
            "sec0": []
          }
        ],
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "properties": {
                  "plan_id": {
                    "type": "integer",
                    "format": "int32"
                  },
                  "website_id": {
                    "type": "integer",
                    "format": "int32",
                    "description": "Only required if adding website-specific add-on. For example, adding on-demand backups for a specific website."
                  }
                },
                "type": "object",
                "required": [
                  "plan_id"
                ]
              }
            }
          }
        }
      }
    }
  },
  "x-readme": {
    "headers": [
      {
        "key": "Content-type",
        "value": "application/json"
      },
      {
        "key": "Accept",
        "value": "application/json"
      }
    ],
    "explorer-enabled": true,
    "proxy-enabled": true
  },
  "x-readme-fauxas": true
}
```