Source: Roblox Creator Hub · CC BY 4.0 · View source · Code samples: MIT Imported 2026-10-03. Formatting adapted for this site.
POST /v1/login/linked — openapi
Endpoint for logging in a user, specifically for linked authentication on PCGDK
Endpoint
Method: POST
Path: /v1/login/linked
Servers:
https://auth.roblox.com
Request Body
Roblox.Authentication.Api.Models.LoginRequest
{
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/Roblox.Authentication.Api.Models.LoginRequest"
}
},
"text/json": {
"schema": {
"$ref": "#/components/schemas/Roblox.Authentication.Api.Models.LoginRequest"
}
}
},
"description": "Roblox.Authentication.Api.Models.LoginRequest",
"required": true
}Responses
| Status | Description |
|---|---|
| 200 | OK |
| 400 | 0: An unexpected error occurred. 3: Username and Password are required. Please try again. 8: Login with received credential type is not supported. |
| 403 | 0: Token Validation Failed 1: Incorrect username or password. Please try again. 2: You must pass the robot test before logging in. 4: Account has been locked. Please request a password reset. 5: Unable to login. Please use Social Network sign on. 6: Account issue. Please contact Support. 9: Unable to login with provided credentials. Default login is required. 10: Received credentials are unverified. 12: Existing login session found. Please log out first. 14: The account is unable to log in. Please log in to the LuoBu app. 15: Too many attempts. Please wait a bit. 27: The account is unable to login. Please log in with the VNG app. 43: This account is not eligible for this platform. 44: Login is unavailable in your country. |
| 429 | 7: Too many attempts. Please wait a bit. |
| 503 | 11: Service unavailable. Please try again. |
{
"200": {
"description": "OK",
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/Roblox.Authentication.Api.Models.LoginResponse"
}
},
"text/json": {
"schema": {
"$ref": "#/components/schemas/Roblox.Authentication.Api.Models.LoginResponse"
}
}
}
},
"400": {
"description": "0: An unexpected error occurred.\r\n3: Username and Password are required. Please try again.\r\n8: Login with received credential type is not supported."
},
"403": {
"description": "0: Token Validation Failed\r\n1: Incorrect username or password. Please try again.\r\n2: You must pass the robot test before logging in.\r\n4: Account has been locked. Please request a password reset.\r\n5: Unable to login. Please use Social Network sign on.\r\n6: Account issue. Please contact Support.\r\n9: Unable to login with provided credentials. Default login is required.\r\n10: Received credentials are unverified.\r\n12: Existing login session found. Please log out first.\r\n14: The account is unable to log in. Please log in to the LuoBu app.\r\n15: Too many attempts. Please wait a bit.\r\n27: The account is unable to login. Please log in with the VNG app.\r\n43: This account is not eligible for this platform.\r\n44: Login is unavailable in your country."
},
"429": {
"description": "7: Too many attempts. Please wait a bit."
},
"503": {
"description": "11: Service unavailable. Please try again."
}
}Authentication
{
"security": [
{}
],
"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": [
"Accounts"
],
"summary": "Endpoint for logging in a user, specifically for linked\nauthentication on PCGDK",
"requestBody": {
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/Roblox.Authentication.Api.Models.LoginRequest"
}
},
"text/json": {
"schema": {
"$ref": "#/components/schemas/Roblox.Authentication.Api.Models.LoginRequest"
}
}
},
"description": "Roblox.Authentication.Api.Models.LoginRequest",
"required": true
},
"responses": {
"200": {
"description": "OK",
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/Roblox.Authentication.Api.Models.LoginResponse"
}
},
"text/json": {
"schema": {
"$ref": "#/components/schemas/Roblox.Authentication.Api.Models.LoginResponse"
}
}
}
},
"400": {
"description": "0: An unexpected error occurred.\r\n3: Username and Password are required. Please try again.\r\n8: Login with received credential type is not supported."
},
"403": {
"description": "0: Token Validation Failed\r\n1: Incorrect username or password. Please try again.\r\n2: You must pass the robot test before logging in.\r\n4: Account has been locked. Please request a password reset.\r\n5: Unable to login. Please use Social Network sign on.\r\n6: Account issue. Please contact Support.\r\n9: Unable to login with provided credentials. Default login is required.\r\n10: Received credentials are unverified.\r\n12: Existing login session found. Please log out first.\r\n14: The account is unable to log in. Please log in to the LuoBu app.\r\n15: Too many attempts. Please wait a bit.\r\n27: The account is unable to login. Please log in with the VNG app.\r\n43: This account is not eligible for this platform.\r\n44: Login is unavailable in your country."
},
"429": {
"description": "7: Too many attempts. Please wait a bit."
},
"503": {
"description": "11: Service unavailable. Please try again."
}
},
"servers": [
{
"url": "https://auth.roblox.com"
}
],
"x-roblox-engine-usability": {
"apiKeyWithHttpService": false
},
"security": [
{}
],
"externalDocs": {
"url": "https://create.roblox.com/docs/cloud/reference/features/accounts#auth_post_v1_login_linked"
},
"x-roblox-recommended-alternatives": [
{
"url": "https://auth.roblox.com/v2/login/linked",
"httpMethod": "POST",
"documentationUrl": "https://create.roblox.com/docs/cloud/reference/features/accounts#auth_post_v2_login_linked"
}
]
}