How to fix Google Antigravity Error 403 Forbidden: Not Available in Your Country / Region Lock?

Google Antigravity enforces client-side eligibility gate checks in main.js, agy CLI, and extension.js alongside server-side Geo-IP verification. To fix this permanently: 1) Run 'antigravity-cleaner patch' or click [Auto-Fix] in Antigravity Cleaner Retro GUI to neutralize client-side region checks across all 4 core targets. 2) Launch with 'antigravity-cleaner launch' to inject an isolated SOCKS5/HTTP proxy directly into the IDE process without requiring root TUN mode.

How to fix Google Antigravity Error 429: Quota Exceeded / Too Many Requests?

Error 429 in Google Antigravity occurs when corrupted token caches and rate-limit counters freeze the agentic runtime. Run 'antigravity-cleaner clean' or click [Reset 429] in the GUI. This performs a surgical purge of temporary quota and telemetry cache files while strictly preserving your Google account login, session cookies, and workspace chat history.

How to run Google Antigravity with v2ray, Xray, Clash, or NekoBox without TUN mode?

TUN mode creates a virtual network interface that slows down your system and causes Middlebox resets. Antigravity Cleaner solves this by launching Antigravity with '--proxy-server=socks5://127.0.0.1: '. It automatically detects active proxy ports (10808 for v2ray/Xray, 2080 for NekoBox/Hiddify, 7890 for Clash) and routes only the IDE traffic through the proxy, leaving the rest of your system on direct high-speed internet.

Why does Google Antigravity crash or disconnect during long code generation tasks?

State-level firewalls and ISP Deep Packet Inspection (DPI) terminate idle TLS and Server-Sent Event (SSE) streams during long reasoning phases. Antigravity Cleaner's smart launcher configures TCP KeepAlive intervals (15 seconds), maintaining active gRPC and HTTP/2 multiplexed streams to Google's edge servers and preventing connection drops.

How to fix 'Your current account is not eligible for Antigravity, because it is not currently available in your location'?

This error occurs because Antigravity checks account eligibility across three separate layers: local JavaScript bundles (main.js, agy CLI, extension.js), core binary eligibility gates (isGoogleInternal), and upstream API GeoIP headers. Running 'antigravity-cleaner patch all' neutralizes the local machine-code and JavaScript gate checks across all components, allowing your account to authenticate cleanly when paired with an active loopback proxy.

How to fix Antigravity Gemini: opaque 'User location is not supported' (HTTP 400)?

HTTP 400 'User location is not supported' happens when outgoing API requests originate from an unsanctioned or unverified IP address. Instead of running a heavy system-wide TUN VPN, launch Antigravity with 'antigravity-cleaner launch'. It probes your local proxy ports (10808, 2080, 7890) and launches the IDE with targeted process-level proxy routing, resolving the 400 error immediately.

How to fix 'Unknown: There was a network issue connecting to the server, please try again.' in Antigravity?

This message indicates that your streaming SSE connection to Google's inference servers was abruptly severed—often by ISP Middlebox firewalls or DPI filters timing out silent TLS connections while the AI model is thinking. Launching Antigravity via Antigravity Cleaner applies an aggressive 15-second TCP KeepAlive socket configuration that keeps the connection active and prevents sudden drops.

Fix Google Antigravity Errors: 403 Region Lock, 429 Quota & Middlebox Resets

1-Click Universal Auto-Fix (Recommended)

Instead of manually editing JavaScript bundles and configuring network routing, run Antigravity Cleaner to patch all 4 targets and generate an isolated proxy launcher automatically:

curl -sSL https://raw.githubusercontent.com/tawroot/antigravity-cleaner/main/install.sh | bash && ag-cleaner patch

* On Windows: Open PowerShell and run irm https://raw.githubusercontent.com/tawroot/antigravity-cleaner/main/install.ps1 | iex

ERROR 403 FORBIDDEN • REGION LOCK

"Service is not available in your country" / Region Lockout

Root Cause: Google DeepMind and Google Cloud enforce strict geographic restrictions on Google Antigravity in countries such as Iran, Russia, China, Cuba, and Syria. The IDE runs internal JavaScript gatekeeper functions that inspect telemetry and token responses. If blocked, Antigravity forces a session invalidation and kicks you out to the login screen.

HTTP 403 Forbidden: Your region is not eligible for Google Antigravity developer preview.

Fixing Error 403 Step-by-Step:

Neutralize Client-Side Checks: Run antigravity-cleaner patch. This surgically unlocks main.js, the IDE binary, CLI (agy), and VS Code extension so the software never locks itself.
Launch with Smart Proxy (No TUN): Run antigravity-cleaner launch. This passes --proxy-server=socks5://127.0.0.1:10808 directly to the Chromium engine. Chromium will resolve Google auth endpoints through your foreign proxy IP, keeping your session intact.
Avoid TUN Mode: Never use global TUN mode for Antigravity. TUN mode causes MTU packet fragmentation and triggers Middlebox DPI dropouts.

ERROR 429 • RATE LIMIT / QUOTA EXHAUSTED

"Too Many Requests" & Corrupted Token Cache

Root Cause: Autonomous agents generate dozens of tool calls, search queries, and subagent transcripts per session. Local token buckets in ~/.config/Antigravity/Cache and DawnWebGPUCache get out of sync with Google's servers, causing perpetual 429 errors even when you have quota left.

Error 429: Resource has been exhausted (e.g. check quota).

How to Resolve Error 429 without Losing Data:

Click the [Reset 429] button in the Antigravity Cleaner GUI or run:
antigravity-cleaner clean
Session Preservation Guarantee: Our surgical reset purges corrupted quota blobs and telemetry caches while strictly preserving your Cookies, Preferences, app_storage.json, and chat history. You do NOT have to log in again.

NETWORK ARCHITECTURE • NO-TUN MODE

Smart Proxy Injection for v2ray, Xray, Clash, and NekoBox

Why traditional VPNs fail: When you enable TUN mode, your entire operating system's traffic is redirected through the VPN. This increases latency, causes packet drops, and breaks local intranet and domestic banking websites.

How Antigravity Cleaner's No-TUN Injection Works:

The Cleaner automatically scans local loopback ports:
- 127.0.0.1:10808 (v2ray / Xray SOCKS5)
- 127.0.0.1:2080 (NekoBox / Hiddify SOCKS5)
- 127.0.0.1:7890 (Clash / Mihomo Mixed)
- 127.0.0.1:1080 (Standard SOCKS5)
It launches Antigravity with a dedicated pipeline: --proxy-server=socks5://127.0.0.1:.
Only Google Antigravity traffic is routed through the proxy. Your web browser, terminal downloads, and domestic sites continue running at maximum local speed!

antigravity-cleaner create-launcher

This generates a permanent 1-click desktop launcher (Antigravity.desktop on Linux, Antigravity.lnk on Windows, Antigravity-Proxy.command on macOS).

CONNECTION DROPOUT • MIDDLEBOX DPI

Middlebox TLS Disconnects & Stream Interruptions

The Issue: During deep thinking or multi-minute code planning, the HTTP/2 SSE connection between the IDE and Google's edge server (daily-cloudcode-pa.googleapis.com) remains silent. Strict ISP firewalls (Middleboxes) mistake idle TLS connections for dead tunnels and send TCP RST packets, causing "Stream Closed / Broken Pipe" errors.

The Solution:

Antigravity Cleaner patches the socket connection layer to inject a 15-second TCP KeepAlive heartbeat. This keeps the stateful connection alive across all firewalls and middleboxes without dropping your agentic sessions.

STARTUP FAILURE • SINGLETON LOCK

Antigravity Won't Open After Crash or Sleep

The Issue: If your system suspends or Antigravity crashes, Chromium leaves a lockfile at ~/.config/Antigravity/SingletonLock pointing to a dead PID. When clicked, Antigravity thinks another instance is active and refuses to open.

# Manual fix:
rm -f ~/.config/Antigravity/SingletonLock ~/.config/Antigravity/SingletonSocket ~/.config/Antigravity/SingletonCookie

Antigravity Cleaner's smart launcher audits and removes stale singleton locks automatically on every launch!

Fix Google Antigravity Errors & Region Lock