# antigravityextensiongate-mcp

A paid remote MCP server that checks Antigravity extension compatibility. It returns structured receipts and audit logs.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, Gemini CLI
- Author: clauxel
- License: not stated · policy=link-only · description only; the file stays with the author
- Source: https://github.com/clauxel/antigravity-extension-gate-mcp
- Updated: 2026-05-20
- HTML: https://affpapa.org/en/nevibecode/mcp/antigravityextensiongate-mcp

## What it does

The server handles compatibility checks for Antigravity extensions and works out where a gap sits. Five tools cover the flow: `check_extension_gate` runs the check, `classify_extension_gap` names what is missing, `suggest_extension_fix` proposes a repair, `issue_extension_receipt` produces a receipt, and `export_extension_audit` dumps the audit log.

It is a hosted paid service. Production calls need a bearer token issued from the product website, sent as `Authorization: Bearer <token>`. Without one, requests to `/mcp` come back as a JSON error. The path is: pick a plan on the site, get a token, point an MCP client that speaks Streamable HTTP at `https://antigravityextensiongate.clauxel.com/mcp`, then send JSON-RPC with the token attached.

The repository is public documentation and a directory-submission reference. Production source is not in it, so self-hosting is off the table.

## Requirements
- Remote server: `https://antigravityextensiongate.clauxel.com/mcp`

## Install

### Claude Code (native platform)

**Platform CLI: remote server**
```bash
claude mcp add --transport http antigravityextensiongate-mcp https://antigravityextensiongate.clauxel.com/mcp
```

### Codex

**Platform CLI: remote server**
```bash
codex mcp add antigravityextensiongate-mcp --url https://antigravityextensiongate.clauxel.com/mcp
```

### Cursor

**Config file**
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "antigravityextensiongate-mcp": {
            "url": "https://antigravityextensiongate.clauxel.com/mcp"
        }
    }
}
```

### GitHub Copilot

**Config file**
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "antigravityextensiongate-mcp": {
            "type": "http",
            "url": "https://antigravityextensiongate.clauxel.com/mcp"
        }
    }
}
```

### Gemini CLI

**Platform CLI: remote server**
```bash
gemini mcp add -t http antigravityextensiongate-mcp https://antigravityextensiongate.clauxel.com/mcp
```

## When to use it
- check whether an Antigravity extension clears the compatibility gate
- pin down which permission or field an extension is missing
- hand a reviewer a receipt instead of a written summary
- export the audit log across every extension check
- get a fix suggestion before resubmitting

## Example prompts
- Run `check_extension_gate` on this extension and tell me whether it passes
- Classify the compatibility gap and propose a fix with `suggest_extension_fix`
- Issue a receipt for the last check and export the extension audit

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