Authentication API

Studio uses cookie-based session authentication. The OAuth flow starts with a redirect URL, completes with code/token exchange, and stores an encrypted httpOnly cookie.

Internal API

These are internal endpoints, not a public external API. They are consumed by the Studio SPA (cookie / encrypted-session based) and the Contentrain CLI (token based, via source: 'cli'). Shapes may change without notice.

Get an OAuth redirect URL for GitHub or Google.

POST /api/auth/login

This endpoint has two modes:

Web (default): reads { provider, redirectTo } from the request body. The provider-generated CSRF state is stored in an encrypted cookie for validation on callback.
CLI: reads provider, redirect_uri, and state from query params. The CLI manages its own CSRF state, so no cookie is set.

Request Body (Web)

Field	Type	Required	Description
`provider`	`'github' \| 'google'`	Yes	OAuth provider
`redirectTo`	`string`	No	Post-auth redirect path (default: `/auth/callback`)

Query Parameters (CLI)

Param	Type	Required	Description
`provider`	`'github' \| 'google'`	Yes	OAuth provider
`redirect_uri`	`string`	Yes	Localhost callback. Must be `http://127.0.0.1` or `http://localhost`, port `9876`-`9899`, path `/callback`.
`state`	`string`	No	Caller-supplied CSRF state. Falls back to the provider-generated state when omitted.

CLI mode activates automatically when both provider and redirect_uri query params are present.

Response

json

{
  "url": "https://github.com/login/oauth/authorize?client_id=...",
  "state": "csrf-state-token"
}

Example

bash

curl -X POST http://localhost:3000/api/auth/login \
  -H "Content-Type: application/json" \
  -d '{"provider": "github"}'

Error Codes

Status	Condition
`400`	Invalid provider, or (CLI) `redirect_uri` is not an allowed localhost callback
`429`	Rate limit exceeded

Auth

Public endpoint. Rate limited: 10 requests per minute per IP.

Verify (Token Exchange)

Exchange an OAuth authorization code or magic link tokens for a session.

POST /api/auth/verify

This endpoint has two modes:

Web (default): stores tokens in an encrypted httpOnly cookie and returns { user }.
CLI (source: 'cli'): returns { user, tokens } and does not set a cookie. The CLI stores the tokens locally and calls /api/auth/refresh when they expire.

Request Body

Field	Type	Required	Description
`code`	`string`	Conditional	OAuth authorization code (code flow)
`state`	`string`	Conditional	CSRF state token (required with `code` in web mode; CLI manages its own state)
`accessToken`	`string`	Conditional	Access token (magic link / implicit flow)
`refreshToken`	`string`	No	Refresh token (magic link / implicit flow)
`source`	`'cli'`	No	When set to `'cli'`, returns tokens instead of setting a cookie

Either code (+ state in web mode) OR accessToken must be provided.

Response (Web)

json

{
  "user": {
    "id": "uuid",
    "email": "[email protected]",
    "avatarUrl": "https://avatars.githubusercontent.com/u/123",
    "provider": "github",
    "providerAccountId": "12345"
  }
}

The server sets an encrypted httpOnly cookie (h3-session) containing the access token, refresh token, and expiration timestamp.

Response (CLI)

json

{
  "user": { "id": "uuid", "email": "[email protected]", "provider": "github", "providerAccountId": "12345", "avatarUrl": null },
  "tokens": {
    "accessToken": "...",
    "refreshToken": "...",
    "expiresAt": 1735689600
  }
}

Error Codes

Status	Condition
`400`	Neither `code` nor `accessToken` provided
`403`	Invalid or missing CSRF state token (web code flow)
`429`	Rate limit exceeded

Auth

Public endpoint. Rate limited: 10 requests per minute per IP.

Refresh (Token Refresh)

Exchange a refresh token for a new access + refresh token pair. Primarily for the CLI -- web clients are auto-refreshed by the auth middleware from the encrypted cookie.

POST /api/auth/refresh

Request Body

Field	Type	Required	Description
`refreshToken`	`string`	Yes	Refresh token from a prior `verify` (CLI) response

Response

json

{
  "accessToken": "...",
  "refreshToken": "...",
  "expiresAt": 1735689600
}

Error Codes

Status	Condition
`400`	`refreshToken` missing
`401`	Session expired / refresh not possible
`429`	Rate limit exceeded

Auth

Public endpoint. Rate limited: 10 requests per minute per IP.

Magic Link

Send a passwordless magic link email.

POST /api/auth/magic-link

Request Body

Field	Type	Required	Description
`email`	`string`	Yes	Email address to send the magic link to
`redirectTo`	`string`	No	Post-auth redirect path (default: `/auth/callback`)

Response

json

{ "sent": true }

Returns 200 regardless of whether the email exists (prevents enumeration).

Auth

Public endpoint. Rate limited: 5 requests per minute per IP.

Current User

Get the currently authenticated user with profile data.

GET /api/auth/me

Response

json

{
  "user": {
    "id": "uuid",
    "email": "[email protected]",
    "avatarUrl": "https://avatars.githubusercontent.com/u/123",
    "provider": "github",
    "providerAccountId": "12345",
    "displayName": "Jane Doe",
    "theme": "system"
  }
}

avatarUrl, displayName, and theme are merged from the user's profile row (theme defaults to system).

Auth

Requires valid session.

Logout

End the current session and clear the session cookie.

POST /api/auth/logout

Response

json

{ "ok": true }

Auth

Requires valid session.

Update Profile

Update the authenticated user's display name and/or theme.

PATCH /api/profile

Request Body

Field	Type	Required	Description
`displayName`	`string`	No	Display name. Trimmed; must be 1-100 characters.
`theme`	`'light' \| 'dark' \| 'system'`	No	UI theme preference.

At least one field must be provided.

Response

Returns the updated profile row.

Error Codes

Status	Condition
`400`	Invalid display name length, invalid theme value, or no fields to update

Auth

Requires valid session.

Upload Avatar

Upload a custom avatar image. The image is resized to 256x256 WebP and stored as a base64 data URI on the profile.

POST /api/profile/avatar

Request

multipart/form-data with a file field. Allowed types: image/jpeg, image/png, image/webp, image/gif. Maximum size: 2 MB.

Response

json

{ "avatarUrl": "data:image/webp;base64,..." }

Error Codes

Status	Condition
`400`	Missing file, unsupported content type, or file larger than 2 MB

Auth

Requires valid session.

Remove Avatar

Remove the custom avatar, reverting to the OAuth provider avatar.

DELETE /api/profile/avatar

Response

json

{ "avatarUrl": null }

Auth

Requires valid session.

Owned Workspaces

List owned secondary workspaces that have other members. Used by the account deletion flow to surface ownership-transfer requirements.

GET /api/profile/owned-workspaces

Response

An array of workspace objects (each including its workspace_members). Workspaces with no members other than the owner are filtered out.

Auth

Requires valid session.

Delete Account

Permanently delete the authenticated user's account. Cleans R2 storage for every owned workspace's projects, then deletes the user from auth.users. A database CASCADE removes profiles, workspaces, members, projects, and all child records. The session cookie is cleared.

DELETE /api/profile

Response

json

{ "deleted": true }

Auth

Requires valid session.

API Reference Overview -- authentication model
Architecture -- session management details

Authentication API ​

Login (OAuth Redirect) ​

Request Body (Web) ​

Query Parameters (CLI) ​

Response ​

Example ​

Error Codes ​

Auth ​

Verify (Token Exchange) ​

Request Body ​

Response (Web) ​

Response (CLI) ​

Error Codes ​

Auth ​

Refresh (Token Refresh) ​

Request Body ​

Response ​

Error Codes ​

Auth ​

Magic Link ​

Request Body ​

Response ​

Auth ​

Current User ​

Response ​

Auth ​

Logout ​

Response ​

Auth ​

Update Profile ​

Request Body ​

Response ​

Error Codes ​

Auth ​

Upload Avatar ​

Request ​

Response ​

Error Codes ​

Auth ​

Remove Avatar ​

Response ​

Auth ​

Owned Workspaces ​

Response ​

Auth ​

Delete Account ​

Response ​

Auth ​

Related Pages ​

Authentication API

Login (OAuth Redirect)

Request Body (Web)

Query Parameters (CLI)

Response

Example

Error Codes

Auth

Verify (Token Exchange)

Request Body

Response (Web)

Response (CLI)

Error Codes

Auth

Refresh (Token Refresh)

Request Body

Response

Error Codes

Auth

Magic Link

Request Body

Response

Auth

Current User

Response

Auth

Logout

Response

Auth

Update Profile

Request Body

Response

Error Codes

Auth

Upload Avatar

Request

Response

Error Codes

Auth

Remove Avatar

Response

Auth

Owned Workspaces

Response

Auth

Delete Account

Response

Auth

Related Pages