Borrowing it
Nothing to install: this file belongs to scarecr0w12/whmcs-mcp-tool. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/scarecr0w12/whmcs-mcp-tool/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/scarecr0w12/whmcs-mcp-toolWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/scarecr0w12/whmcs-mcp-tool/copilot-instructions)<a href="https://agentmods.dev/instructions/scarecr0w12/whmcs-mcp-tool/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/scarecr0w12/whmcs-mcp-tool/copilot-instructions/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/scarecr0w12/whmcs-mcp-tool/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/scarecr0w12/whmcs-mcp-tool/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00363 | $0.00363 |
| Opus 5 | $0.00181 | $0.00181 |
| Sonnet 5 | $0.00073 | $0.00073 |
| Haiku 4.5 | $0.00036 | $0.00036 |
Grade C, and why
whmcs-mcp-tool copilot-instructions.md scanned grade C with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
<!-- Use this file to provide workspace-specific custom instructions to Copilot. --> What it actually says
WHMCS MCP Server
This is a Model Context Protocol (MCP) server for managing WHMCS installations.
Project Structure
src/index.ts- Main MCP server with all tool registrationssrc/whmcs-client.ts- WHMCS API client for making authenticated requests.vscode/mcp.json- VS Code MCP configuration
Key Technologies
- TypeScript
- Model Context Protocol SDK (
@modelcontextprotocol/sdk) - Zod for schema validation
- WHMCS External API
WHMCS API Reference
The server uses the WHMCS External API which communicates via POST requests to /includes/api.php.
Authentication is done via API credentials (identifier + secret) which can be created in: WHMCS Admin > Setup > Staff Management > API Credentials
Adding New Tools
To add a new WHMCS API tool:
- Add the method to
src/whmcs-client.tswith proper TypeScript types - Register the tool in
src/index.tsusingserver.registerTool() - Define input schema using Zod validators
- Handle the response appropriately
Building and Running
npm install # Install dependencies
npm run build # Build TypeScript
npm run dev # Run in development mode
npm start # Run compiled version
Environment Variables
Required:
WHMCS_API_URL- WHMCS installation URLWHMCS_API_IDENTIFIER- API credential identifierWHMCS_API_SECRET- API credential secret
Optional:
WHMCS_ACCESS_KEY- Additional API access key
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 54 lines · 363 tokens per session scan C cfb1330e908b
whmcs-mcp-tool copilot-instructions.md is an instructions file published in the GitHub repository scarecr0w12/whmcs-mcp-tool (20 stars, last pushed 5mo ago), licensed MIT. It adds 363 tokens to every session, about $0.0018 per session on Opus 5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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