---
title: "Auth Check"
method: GET
path: "/v1/auth/check"
---

# Auth Check

`GET /v1/auth/check`

Verify API key validity before use.
Clients/scripts call this to get clear status:
  - key valid/expired/invalid
  - plan & quota info
  - human-readable messages
Accepts key via x-api-key header, Authorization: Bearer header, or JSON body {"api_key": "..."}.

## Response `200`

Successful Response

- unknown

---

[API](https://skmtc.dev/nkq/apis/antigravity-ai-proxy.md) · [All operations](https://skmtc.dev/nkq/apis/antigravity-ai-proxy/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/nkq/antigravity-ai-proxy/revisions/58a38b92d2d5/schema)