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Source: Roblox Creator Hub · CC BY 4.0 · View source · Code samples: MIT Imported 2026-10-03. Formatting adapted for this site.

POST /creator-configs-public-api/v1/experimentation/universes/{universeId}/experiments — openapi

Creates a new experiment for a universe.

Returns an ExperimentOperation describing the async create call.

Endpoint

Method: POST

Path: /creator-configs-public-api/v1/experimentation/universes/{universeId}/experiments

Servers:

Parameters

NameLocationRequiredDescription
universeIdpathtrue
[
  {
    "name": "universeId",
    "in": "path",
    "required": true,
    "schema": {
      "type": "integer",
      "format": "int64"
    }
  }
]

Request Body

{
  "content": {
    "application/json-patch+json": {
      "schema": {
        "allOf": [
          {
            "$ref": "#/components/schemas/CreateExperimentData"
          }
        ],
        "description": "Request body for `POST /v1/experimentation/universes/{universeId}/experiments`.\r\nPayload describing a new experiment."
      }
    },
    "application/json": {
      "schema": {
        "allOf": [
          {
            "$ref": "#/components/schemas/CreateExperimentData"
          }
        ],
        "description": "Request body for `POST /v1/experimentation/universes/{universeId}/experiments`.\r\nPayload describing a new experiment."
      }
    },
    "text/json": {
      "schema": {
        "allOf": [
          {
            "$ref": "#/components/schemas/CreateExperimentData"
          }
        ],
        "description": "Request body for `POST /v1/experimentation/universes/{universeId}/experiments`.\r\nPayload describing a new experiment."
      }
    },
    "application/*+json": {
      "schema": {
        "allOf": [
          {
            "$ref": "#/components/schemas/CreateExperimentData"
          }
        ],
        "description": "Request body for `POST /v1/experimentation/universes/{universeId}/experiments`.\r\nPayload describing a new experiment."
      }
    }
  },
  "required": true
}

Responses

StatusDescription
200OK
400Bad Request
401Unauthorized
404Not Found
{
  "200": {
    "description": "OK",
    "content": {
      "application/json": {
        "schema": {
          "$ref": "#/components/schemas/CreateExperimentResponse"
        }
      }
    }
  },
  "400": {
    "description": "Bad Request",
    "content": {
      "application/json": {
        "schema": {
          "$ref": "#/components/schemas/ActionResult"
        }
      }
    }
  },
  "401": {
    "description": "Unauthorized",
    "content": {
      "application/json": {
        "schema": {
          "$ref": "#/components/schemas/ActionResult"
        }
      }
    }
  },
  "404": {
    "description": "Not Found",
    "content": {
      "application/json": {
        "schema": {
          "$ref": "#/components/schemas/ActionResult"
        }
      }
    }
  }
}

Authentication

{
  "security": [
    {
      "roblox-legacy-cookie": []
    },
    {
      "roblox-api-key": []
    },
    {
      "roblox-oauth2": [
        "universe:write"
      ]
    }
  ],
  "securitySchemes": {
    "roblox-api-key": {
      "type": "apiKey",
      "description": "A configurable key that allows granular access to Roblox resources. See https://create.roblox.com/docs/cloud/auth/api-keys for more information.",
      "name": "x-api-key",
      "in": "header"
    },
    "roblox-legacy-cookie": {
      "type": "apiKey",
      "description": "A browser cookie that represents the identity of a Roblox user. DO NOT SHARE THIS. Sharing this will allow someone to log in as you and to steal your Robux and items. We do not recommend using cookies to call endpoints. When possible, use API keys with the x-api-key header or OAuth 2.0 instead for authentication.",
      "in": "cookie",
      "name": ".ROBLOSECURITY"
    },
    "roblox-oauth2": {
      "type": "oauth2",
      "description": "Build or authorize apps to access Roblox resources. See https://create.roblox.com/docs/cloud/auth/oauth2-overview for more information.",
      "flows": {
        "authorizationCode": {
          "authorizationUrl": "https://apis.roblox.com/oauth/v1/authorize",
          "tokenUrl": "https://apis.roblox.com/oauth/v1/token",
          "refreshUrl": "https://apis.roblox.com/oauth/v1/token",
          "scopes": {}
        }
      }
    }
  }
}

Complete Operation Definition

{
  "tags": [
    "Experiments"
  ],
  "summary": "Creates a new experiment for a universe.",
  "description": "Returns an ExperimentOperation describing the async create call.",
  "operationId": "PublicExperimentation_CreateExperiment",
  "parameters": [
    {
      "name": "universeId",
      "in": "path",
      "required": true,
      "schema": {
        "type": "integer",
        "format": "int64"
      }
    }
  ],
  "requestBody": {
    "content": {
      "application/json-patch+json": {
        "schema": {
          "allOf": [
            {
              "$ref": "#/components/schemas/CreateExperimentData"
            }
          ],
          "description": "Request body for `POST /v1/experimentation/universes/{universeId}/experiments`.\r\nPayload describing a new experiment."
        }
      },
      "application/json": {
        "schema": {
          "allOf": [
            {
              "$ref": "#/components/schemas/CreateExperimentData"
            }
          ],
          "description": "Request body for `POST /v1/experimentation/universes/{universeId}/experiments`.\r\nPayload describing a new experiment."
        }
      },
      "text/json": {
        "schema": {
          "allOf": [
            {
              "$ref": "#/components/schemas/CreateExperimentData"
            }
          ],
          "description": "Request body for `POST /v1/experimentation/universes/{universeId}/experiments`.\r\nPayload describing a new experiment."
        }
      },
      "application/*+json": {
        "schema": {
          "allOf": [
            {
              "$ref": "#/components/schemas/CreateExperimentData"
            }
          ],
          "description": "Request body for `POST /v1/experimentation/universes/{universeId}/experiments`.\r\nPayload describing a new experiment."
        }
      }
    },
    "required": true
  },
  "responses": {
    "200": {
      "description": "OK",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/CreateExperimentResponse"
          }
        }
      }
    },
    "400": {
      "description": "Bad Request",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/ActionResult"
          }
        }
      }
    },
    "401": {
      "description": "Unauthorized",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/ActionResult"
          }
        }
      }
    },
    "404": {
      "description": "Not Found",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/ActionResult"
          }
        }
      }
    }
  },
  "x-roblox-stability": "EXPERIMENTAL",
  "x-roblox-rate-limits": {
    "perApiKeyOwner": {
      "period": "MINUTE",
      "maxInPeriod": 10
    },
    "perOauth2Authorization": {
      "period": "MINUTE",
      "maxInPeriod": 10
    }
  },
  "x-roblox-scopes": [
    {
      "name": "universe:write",
      "targetResourceSpecifier": "universes"
    }
  ],
  "x-roblox-engine-usability": {
    "apiKeyWithHttpService": false
  },
  "security": [
    {
      "roblox-legacy-cookie": []
    },
    {
      "roblox-api-key": []
    },
    {
      "roblox-oauth2": [
        "universe:write"
      ]
    }
  ],
  "externalDocs": {
    "url": "https://create.roblox.com/docs/cloud/reference/features/experiments#PublicExperimentation_CreateExperiment"
  }
}