# Fix OpenClaw OAuth Error: Antigravity Auth Guide

Fix OpenClaw OAuth Error with this Antigravity Auth guide. Solve 401, 403, plugin, token, and gateway issues safely with practical steps.

## Why OAuth Errors Happen

OAuth errors with Antigravity usually come from expired tokens, disabled plugins, version mismatch, account restrictions, or provider-side policy changes. Often not your local setup.

## What Is the Error?

OpenClaw tries to authenticate with Antigravity, OAuth flow fails or token rejected, provider refuses access. Common errors: OAuth login failed, version no longer supported, 401 unauthorized, 403 forbidden.

## Why Antigravity OAuth Can Fail

| Cause | Meaning | Fix |
|-------|---------|-----|
| Expired token | Old session invalid | Re-authenticate |
| Plugin disabled | Auth plugin inactive | Check plugin status |
| Plugin missing | Version changed handling | Update or verify |
| Old OpenClaw | Auth flow outdated | Upgrade |
| Provider blocked | Antigravity rejects flow | Use supported API |
| Account restricted | Provider limited access | Stop, review account |
| Wrong config | Pointing to wrong route | Check provider settings |

## Important Warning

Antigravity OAuth may not be stable or approved. Some users reported account restrictions. If provider disallows the flow, do not bypass. Use official API keys.

## Quick Diagnosis

- Is OpenClaw updated?
- Is gateway running?
- Is auth plugin available?
- Plugin enabled?
- Token expired?
- Provider access changed?
- Logs showing 401/403?
- Only Antigravity or all providers?

```bash
openclaw --version
openclaw gateway status
openclaw plugins list
openclaw logs --follow
```

## Fix 1: Update OpenClaw

```bash
openclaw update
openclaw gateway restart
```

## Fix 2: Check Gateway

```bash
openclaw gateway status
openclaw gateway restart
openclaw logs --follow
```

Look for: auth callback errors, 401/403, plugin load errors, token refresh errors.

## Fix 3: Check Auth Plugin

```bash
openclaw plugins list
openclaw plugins enable google-antigravity-auth
openclaw gateway restart
```

Only enable if version supports it and terms allow it. Do not bypass restrictions.

## Fix 4: Remove Stale Tokens

- Sign out from provider in OpenClaw
- Remove stale OAuth session
- Reconnect with fresh login
- Restart gateway

Do not paste tokens from random sources. That converts "auth error" into "security incident."

```bash
openclaw auth logout antigravity
openclaw gateway restart
```

## Fix 5: 401 vs 403

| Error | Meaning | What to Do |
|-------|---------|-----------|
| 401 | Token invalid/expired | Re-authenticate |
| 403 | Account/flow forbidden | Stop, use supported access |
| Version unsupported | Client outdated | Update OpenClaw |
| Plugin not found | Plugin missing | Check install/version |
| Token refresh failed | Can't renew | Log out, reconnect |

## Fix 6: Stop If Account Risk

Switch alternatives if:
- Google account restricted
- Antigravity access revoked
- Repeated 403s
- Provider says client unsupported
- OAuth works briefly then fails
- Others report bans/restrictions

Safer: Gemini API key, OpenAI/Claude/OpenRouter keys, local Ollama, managed hosting.

## Use Gemini API Key

1. Create Gemini API project
2. Generate API key
3. Add to OpenClaw provider settings
4. Select Gemini model
5. Test
6. Disable Antigravity OAuth

```env
GEMINI_API_KEY=your_gemini_api_key
```

```bash
openclaw gateway restart
openclaw models list
```

## Use OpenRouter

- One key, many models
- OpenAI-compatible providers
- Easier to monitor and rotate

```env
OPENROUTER_API_KEY=your_openrouter_key
```

## Run on Ampere.sh

Skip OAuth debugging entirely with managed hosting.

## Final Recommendation

- Update OpenClaw first
- Check gateway status
- Check plugin availability
- Remove stale tokens
- Read 401/403 differently
- Do not bypass restrictions
- Use API keys or managed hosting

## FAQ

**Why is Antigravity OAuth not working?**
Expired tokens, disabled plugins, outdated version, provider restrictions, account issues.

**401 means?**
Token invalid/expired/malformed.

**403 means?**
Provider refusing access - permission limits or unsupported flow.

**Should I keep using it?**
Only with supported flows. If 403s repeat, switch to API keys.

**Stale tokens?**
Log out, remove session, reconnect, restart gateway.

**Gemini API safer?**
Yes, cleaner and easier to monitor than OAuth.

**Ampere.sh help?**
Yes, managed hosting with cleaner provider config.

---

Skip OAuth headaches: https://www.ampere.sh/setup