---
title: "Sign In Facebook"
method: POST
path: "/api/v1/auth/facebook"
tags: ["auth"]
---

# Sign In Facebook

`POST /api/v1/auth/facebook`

## Request

- Base URL: `https://api.alert.camp` (the document declares no server; this is the origin it was published from)
- URL: `https://api.alert.camp/api/v1/auth/facebook`
- Auth: none declared

Sign in with Facebook via backend.

Receives the Facebook access token from the mobile client's native
Facebook Login SDK, exchanges it for Firebase tokens via REST API.

## Request body

- FacebookSignInRequest: Schema for Facebook sign-in via backend (reCAPTCHA bypass).
  - `access_token` string, required: Facebook access token
  - `language` string, nullable

## Response `200`

Successful Response

- DirectTokenResponse: Response containing Firebase tokens for direct auth (no SDK needed).
  - `id_token` string, required
  - `refresh_token` string, required
  - `user_id` string, required
  - `email` string, required
  - `display_name` string, nullable
  - `email_verified` boolean
  - `terms_accepted` boolean
  - `terms_previously_accepted` boolean

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/alert/apis/alertcamp.md) · [All operations](https://skmtc.dev/alert/apis/alertcamp/llms.txt) · [OpenAPI document](https://skmtc.dev/alert/apis/alertcamp/revisions/864c8c9ef833?raw)