---
title: "Start federation SSO"
method: GET
path: "/auth/federation/{appId}"
tags: ["auth"]
---

# Start federation SSO

`GET /auth/federation/{appId}`

## Request

- Base URL: `https://api.thebridge.dev` (the document declares no server; this is the origin it was published from)
- URL: `https://api.thebridge.dev/auth/federation/{appId}`
- Auth: none declared

Initiate SSO federation flow for SDK popup mode. Creates OAuth context and redirects to the federation provider.

## Path parameters

- `appId` string, required

## Query parameters

- `provider` string, required
- `mode` string, required
- `targetOrigin` string, required
- `redirect_uri` string, required
- `cli_flow` string, required
- `cli_return` string, required

## Other responses

- `302`: Redirects to federation provider

---

[API](https://skmtc.dev/thebridge/apis/bridge-api.md) · [All operations](https://skmtc.dev/thebridge/apis/bridge-api/llms.txt) · [OpenAPI document](https://skmtc.dev/thebridge/apis/bridge-api/revisions/290fffcb3d80?raw)