---
title: "Firebase Bridge"
method: POST
path: "/v1/auth/firebase-bridge"
tags: ["auth"]
---

# Firebase Bridge

`POST /v1/auth/firebase-bridge`

Bridge Firebase Auth → Supabase Auth.

Accepts a Firebase ID token from the website, verifies it,
finds or creates the matching Supabase user, and returns a
Supabase access token that works with all billing endpoints.

## Request body

- FirebaseBridgeRequest
  - `firebase_token` string, required

## Response `200`

Successful Response

- FirebaseBridgeResponse
  - `access_token` string, required
  - `refresh_token` string, required
  - `user_id` string, required
  - `email` string, required

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/sigmanticai/apis/sigmanticai-gateway.md) · [All operations](https://skmtc.dev/sigmanticai/apis/sigmanticai-gateway/llms.txt) · [OpenAPI document](https://skmtc.dev/sigmanticai/apis/sigmanticai-gateway/revisions/15fa2b3394e5?raw)