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:calculateMde — openapi
Calculates the Minimum Detectable Effect (MDE) for a prospective experiment.
Poll by clients until the operation is complete.
Endpoint
Method: POST
Path: /creator-configs-public-api/v1/experimentation/universes/{universeId}/experiments:calculateMde
Servers:
https://apis.roblox.com
Parameters
| Name | Location | Required | Description |
|---|---|---|---|
| universeId | path | true |
[
{
"name": "universeId",
"in": "path",
"required": true,
"schema": {
"type": "integer",
"format": "int64"
}
}
] Request Body
{
"content": {
"application/json-patch+json": {
"schema": {
"allOf": [
{
"$ref": "#/components/schemas/CalculateExperimentMdeData"
}
],
"description": "Request body for\r\n`POST /v1/experimentation/universes/{universeId}/experiments:calculateMde`."
}
},
"application/json": {
"schema": {
"allOf": [
{
"$ref": "#/components/schemas/CalculateExperimentMdeData"
}
],
"description": "Request body for\r\n`POST /v1/experimentation/universes/{universeId}/experiments:calculateMde`."
}
},
"text/json": {
"schema": {
"allOf": [
{
"$ref": "#/components/schemas/CalculateExperimentMdeData"
}
],
"description": "Request body for\r\n`POST /v1/experimentation/universes/{universeId}/experiments:calculateMde`."
}
},
"application/*+json": {
"schema": {
"allOf": [
{
"$ref": "#/components/schemas/CalculateExperimentMdeData"
}
],
"description": "Request body for\r\n`POST /v1/experimentation/universes/{universeId}/experiments:calculateMde`."
}
}
},
"required": true
} Responses
| Status | Description |
|---|---|
| 200 | OK |
| 400 | Bad Request |
| 401 | Unauthorized |
| 404 | Not Found |
{
"200": {
"description": "OK",
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/CalculateExperimentMdeResponse"
}
}
}
},
"400": {
"description": "Bad Request",
"content": {
"application/json": {
"schema": {
"$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:read"
]
}
],
"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": {}
}
}
}
}
} Related Schemas
Complete Operation Definition
{
"tags": [
"Experiments"
],
"summary": "Calculates the Minimum Detectable Effect (MDE) for a prospective experiment.",
"description": "Poll by clients until the operation is complete.",
"operationId": "PublicExperimentation_CalculateExperimentMde",
"parameters": [
{
"name": "universeId",
"in": "path",
"required": true,
"schema": {
"type": "integer",
"format": "int64"
}
}
],
"requestBody": {
"content": {
"application/json-patch+json": {
"schema": {
"allOf": [
{
"$ref": "#/components/schemas/CalculateExperimentMdeData"
}
],
"description": "Request body for\r\n`POST /v1/experimentation/universes/{universeId}/experiments:calculateMde`."
}
},
"application/json": {
"schema": {
"allOf": [
{
"$ref": "#/components/schemas/CalculateExperimentMdeData"
}
],
"description": "Request body for\r\n`POST /v1/experimentation/universes/{universeId}/experiments:calculateMde`."
}
},
"text/json": {
"schema": {
"allOf": [
{
"$ref": "#/components/schemas/CalculateExperimentMdeData"
}
],
"description": "Request body for\r\n`POST /v1/experimentation/universes/{universeId}/experiments:calculateMde`."
}
},
"application/*+json": {
"schema": {
"allOf": [
{
"$ref": "#/components/schemas/CalculateExperimentMdeData"
}
],
"description": "Request body for\r\n`POST /v1/experimentation/universes/{universeId}/experiments:calculateMde`."
}
}
},
"required": true
},
"responses": {
"200": {
"description": "OK",
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/CalculateExperimentMdeResponse"
}
}
}
},
"400": {
"description": "Bad Request",
"content": {
"application/json": {
"schema": {
"$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:read",
"targetResourceSpecifier": "universes"
}
],
"x-roblox-engine-usability": {
"apiKeyWithHttpService": false
},
"security": [
{
"roblox-legacy-cookie": []
},
{
"roblox-api-key": []
},
{
"roblox-oauth2": [
"universe:read"
]
}
],
"externalDocs": {
"url": "https://create.roblox.com/docs/cloud/reference/features/experiments#PublicExperimentation_CalculateExperimentMde"
}
}