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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.

GET /v1/game-start-info — openapi

The server will call this on game server start to request general information about the universe This is version 1.1, which returns an entry from the UniverseAvatarType enum. During mixed mode this may return unreliable results.

Endpoint

Method: GET

Path: /v1/game-start-info

Servers:

Parameters

NameLocationRequiredDescription
universeIdquerytrue
Roblox-Place-Idheaderfalse
[
  {
    "in": "query",
    "name": "universeId",
    "description": "",
    "required": true,
    "schema": {
      "type": "integer",
      "format": "int64"
    }
  },
  {
    "in": "header",
    "name": "Roblox-Place-Id",
    "description": "",
    "schema": {
      "type": "integer",
      "format": "int64"
    }
  }
]

Responses

StatusDescription
200OK
{
  "200": {
    "description": "OK",
    "content": {
      "application/json": {
        "schema": {
          "$ref": "#/components/schemas/Roblox.Api.Avatar.Models.GameStartInfoResponse"
        }
      },
      "text/json": {
        "schema": {
          "$ref": "#/components/schemas/Roblox.Api.Avatar.Models.GameStartInfoResponse"
        }
      }
    }
  }
}

Authentication

{
  "security": [
    {},
    {
      "roblox-legacy-cookie": []
    }
  ],
  "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": [
    "Avatars",
    "Universes"
  ],
  "summary": "The server will call this on game server start to request general information about the universe\r\nThis is version 1.1, which returns an entry from the UniverseAvatarType enum.\r\nDuring mixed mode this may return unreliable results.",
  "parameters": [
    {
      "in": "query",
      "name": "universeId",
      "description": "",
      "required": true,
      "schema": {
        "type": "integer",
        "format": "int64"
      }
    },
    {
      "in": "header",
      "name": "Roblox-Place-Id",
      "description": "",
      "schema": {
        "type": "integer",
        "format": "int64"
      }
    }
  ],
  "responses": {
    "200": {
      "description": "OK",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/Roblox.Api.Avatar.Models.GameStartInfoResponse"
          }
        },
        "text/json": {
          "schema": {
            "$ref": "#/components/schemas/Roblox.Api.Avatar.Models.GameStartInfoResponse"
          }
        }
      }
    }
  },
  "servers": [
    {
      "url": "https://avatar.roblox.com"
    }
  ],
  "x-roblox-engine-usability": {
    "apiKeyWithHttpService": false
  },
  "security": [
    {},
    {
      "roblox-legacy-cookie": []
    }
  ],
  "externalDocs": {
    "url": "https://create.roblox.com/docs/cloud/reference/features/avatars#avatar_get_v1_game_start_info"
  }
}