---
title: "Signs a user up for Roblox and links the account to the authenticated external provider ID."
method: POST
path: "/v1/external/access"
tags: ["Accounts"]
---

# Signs a user up for Roblox and links the account to the authenticated external provider ID.

`POST /v1/external/access`

## Request body

- RobloxAuthenticationApiModelsRequestExternalAccessRequest
  - `authenticationProof` string
  - `identityProviderPlatformType` 0 | 1 | 2 | 3 | 4 — ['Undefined' = 0, 'Xbox' = 1, 'Playstation' = 2, 'Web' = 3, 'Steam' = 4]
  - `postAuthenticationIntentId` string
  - `additionalInfoPayload` object

## Response `200`

OK

- RobloxAuthenticationApiModelsResponseExternalIdentityGatewayExternalIdentityAccessResponse
  - `placeId` integer
  - `isolationContext` string
  - `launchData` string

## Changes

- **2026-09-17** `7c6787738100` — 4 info
  - added the new optional request property `postAuthenticationIntentId` (media type: application/json)
  - added the new optional request property `postAuthenticationIntentId` (media type: text/json)
  - added the new `4.00` enum value to the request property `identityProviderPlatformType` (media type: application/json)
  - added the new `4.00` enum value to the request property `identityProviderPlatformType` (media type: text/json)
- **2026-09-03** `d9b4ae8b3380` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/roblox/apis/roblox-api/changes/v1/external/access/post.md)

---

[API](https://skmtc.dev/roblox/apis/roblox-api.md) · [All operations](https://skmtc.dev/roblox/apis/roblox-api/llms.txt) · [OpenAPI document](https://skmtc.dev/roblox/apis/roblox-api/revisions/7c6787738100?raw)