Google Antigravity + WHMCS MCP Server
Google Antigravity is an IDE with autonomous agents that plan and execute multi-step tasks across editor, terminal, and browser. Connect it to WHMCS via MCP Server and agents can query client data, generate reports, and build integrations independently. Supports Gemini 3, Claude Sonnet, and GPT-4o. Free during public preview.
What You Can Do
Google Antigravity agents plan and execute multi-step WHMCS tasks autonomously.
Autonomous WHMCS Audits
Deploy an agent to audit your WHMCS: it queries overdue invoices, identifies clients 30+ days late, cross-references with their service status, and produces a report with recommended actions. The agent plans the steps, executes them, and delivers results without manual intervention.
Example prompt:
“Audit all overdue invoices, identify clients over 30 days late, and draft a reminder email template for each.”
Agent produces a structured report with client names, amounts, days overdue, and draft email templates. Delivered as an artifact you can review and act on.
Multi-Model WHMCS Queries
Switch between Gemini 3 (fast, free), Claude Sonnet (accurate reasoning), and GPT-4o (broad knowledge) within the same session. Use the best model for each task while keeping your MCP connection to WHMCS intact. Compare model outputs for the same query.
Example prompt:
“Show me this month's revenue by product group, then generate a chart-ready CSV I can share with my team.”
Revenue data from MCP, formatted as CSV. You can switch models mid-session to compare formatting or analysis quality.
Background Report Generation
Start a WHMCS report task in the Manager Surface and continue coding. The agent queries MCP for data, processes it, and notifies you when the report is ready. Includes screenshots and formatted artifacts.
Example prompt:
“Run a full audit of all client services, flag any with mismatched billing cycles, and create a report.”
Agent works asynchronously. You get a notification with the completed report while you continue other work.
WHMCS Module Development with Context
Build WHMCS modules while the agent queries live data to understand your actual product catalog, client structures, and hook points. The agent can write PHP hooks, test them mentally against real data structures, and iterate.
Example prompt:
“Create a WHMCS hook that sends a Slack notification when a new order is placed. Test it against our current product catalog.”
Generated hook code uses your actual product group names and field structures because the agent queried your WHMCS.
How to Connect
Get Google Antigravity talking to your WHMCS in minutes.
Install MCP Server on your WHMCS
Upload the addon to your WHMCS installation, activate it, and generate a Bearer token. Takes about 5 minutes. Full installation guide
Configure Google Antigravity
Add your WHMCS MCP Server to Google Antigravity's config file:
// Antigravity: mcp_config.json
// Access via: Agent Session > "..." > MCP Servers > Manage > View raw config
{
"mcpServers": {
"whmcs": {
"command": "npx",
"args": [
"mcp-remote",
"https://your-whmcs.com/modules/addons/mx_mcp/mcp.php",
"--header",
"Authorization:Bearer YOUR_BEARER_TOKEN"
]
}
}
}
// Troubleshooting: if the server does not connect, replace "npx" with the absolute path.
// Antigravity runs in an isolated environment and may not inherit your shell PATH.
// macOS/Linux: run "which npx" in your terminal to find the path (e.g. /usr/local/bin/npx)
// Windows: run "where npx" in Command Prompt (e.g. C:\Program Files\nodejs\npx.cmd)
// Docs: https://antigravity.google/docs/mcpConfig location: Antigravity Settings > MCP Servers > View raw config
Restart and test
Restart Google Antigravity and try a simple query like “Get WHMCS system status” to verify the connection.
Example Prompts
Real queries you can ask Google Antigravity once connected to WHMCS.
“Get all overdue invoices and group them by days overdue (7, 14, 30+). Suggest a collection strategy for each group.”
“Show me all active clients with more than 3 services. Which ones have the highest revenue?”
“List all support tickets opened this week. Categorize them by topic and suggest FAQ articles we should write.”
“Get our current MRR and compare it to last month. What products are growing fastest?”
“Audit server utilization: list all servers with their active service count and flag any over capacity.”
Google Antigravity vs Cursor for WHMCS
Both are AI-powered code editors with MCP support. Here is how they differ for WHMCS work.
| Feature | Antigravity | Cursor |
|---|---|---|
| AI execution model | Autonomous agents (plan + execute) | Interactive (user directs each step) |
| Background tasks | Yes (Manager Surface) | No |
| Multi-model switching | Gemini 3, Claude Sonnet, GPT-4o in same session | One model per session |
| MCP Store | Built-in marketplace | Manual config only |
| Browser automation | Built-in (agents can navigate web) | No |
| Price | Free (preview) | Free community / $20 pro |
Antigravity is in public preview (free). Cursor has free community and $20/mo pro tiers. Both work with WHMCS MCP Server.
Data Flow
How Antigravity Connects to WHMCS
Google Antigravity deploys autonomous agents that query your WHMCS data through MCP Server. Agents plan, execute, and verify tasks across editor, terminal, and browser.
MCP Server
AI Integration Hub
Better Together
MCP Server works with the full MX ecosystem. More modules, more data, more capabilities.
Antigravity agents can autonomously pull MX Metrics data, analyze revenue trends, flag anomalies, and generate reports. Set up a background task: "Analyze MRR trends and flag any product with declining revenue."
Learn about MX Metrics →Agents can query MX Proposals data to track your sales pipeline. Ask an agent to "Review all pending proposals, identify stale ones over 14 days, and draft follow-up emails."
Learn about MX Proposals →How your data flows
AI processing goes through Google (Gemini) or your chosen model provider (Anthropic, OpenAI). Your WHMCS data stays on your server. Only MCP responses travel to the cloud for AI processing. The model provider depends on which model you select in the session.
For maximum privacy, consider using local AI models that run entirely on your hardware. No data leaves your server.
Frequently Asked Questions
- Does Google Antigravity support MCP?
- Yes. Antigravity has native MCP support and includes a built-in MCP Store where you can browse and install MCP servers. Configuration is stored in mcp_config.json and auto-reloads when saved. Supports STDIO, SSE, and HTTP transports.
- How do I add WHMCS MCP Server to Antigravity?
- Open any Agent Session, click the "..." menu at the top of the side panel, select MCP Servers, then Manage MCP Servers > View raw config. Add your WHMCS MCP Server configuration to the mcp_config.json file. Antigravity detects the new server automatically.
- Is Google Antigravity free?
- Yes, during the public preview (launched February 2026). It runs on macOS, Windows, and Linux. Google has indicated a paid subscription model will follow, but no pricing has been announced. MCP support is included at no extra cost.
- What AI models does Antigravity support?
- Gemini 3 Pro, Gemini 3 Flash, Gemini 3 Deep Think, Claude Sonnet 4, and GPT-4o. You can switch models within the same session. All models can use MCP tools. Gemini models are free during preview. Third-party models (Claude, GPT) may require API keys or subscriptions.
- How is Antigravity different from Cursor for WHMCS work?
- Antigravity adds autonomous agents that plan and execute multi-step tasks independently. In Cursor, you direct each step manually. Antigravity agents can run WHMCS audits, generate reports, and build code in the background while you work on something else. Cursor is better for interactive, step-by-step development. See the comparison table on this page.
- Can Antigravity agents modify WHMCS data?
- Yes, if your Bearer token has write permissions. Agents can create tickets, update client records, and manage invoices through MCP tools. Always use read-only Bearer tokens for exploration tasks and full-access tokens only when you explicitly want agents to make changes. Antigravity shows a confirmation before each tool call so you can approve or deny.
- The MCP Server is not connecting. What should I check?
- The most common cause is that Antigravity cannot find npx. It runs in an isolated environment and does not inherit your shell PATH. Fix: replace "npx" in the command field with the absolute path. On macOS/Linux, run "which npx" in your terminal to find it (e.g. /usr/local/bin/npx). On Windows, run "where npx" in Command Prompt. See the Antigravity MCP documentation at https://antigravity.google/docs/mcp for further troubleshooting.
Start using Google Antigravity with WHMCS today
Install MCP Server, configure Google Antigravity, and query your WHMCS data in plain English. Setup takes less than 15 minutes.