---
title: "Complete platform-operator Google SSO callback"
method: GET
path: "/v3/auth/callback"
tags: ["Auth"]
---

# Complete platform-operator Google SSO callback

`GET /v3/auth/callback`

Validates state, nonce, Google ID-token claims, and active platform-admin access.

## Query parameters

- `code` string, required
- `state` string, required

## Other responses

- `302` — Successful callback; session and CSRF cookies are set, then browser is redirected.
- `400` — Invalid callback, state, nonce, or ID token.
- `403` — Google identity is not an active platform admin.

---

[API](https://skmtc.dev/euler/apis/euler-data-api-v3.md) · [All operations](https://skmtc.dev/euler/apis/euler-data-api-v3/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/euler/euler-data-api-v3/revisions/9573a5fbd4a6/schema)