ZPL Engine MCP

What is ZPL Engine MCP?

ZPL Engine MCP is a Model Context Protocol (MCP) server for the Zero Point Logic Engine, a post-binary stability and neutrality analysis system. It connects any MCP-compatible AI client (Claude Desktop, Claude Code, Cursor, Windsurf, etc.) to the ZPL Engine API for real-time bias detection, stability scoring, and neutrality analysis across multiple domains. It provides 68 tools in 11 categories: Core, Finance, Gaming, AI/ML, Security, Crypto, Certification, Advanced, Universal, Meta, and AI Eval.

How to use ZPL Engine MCP?

Run npx zpl-engine-mcp@latest setup in your terminal to authenticate, create a per-machine API key, and auto-patch MCP client configs (Claude Desktop, Cursor, Windsurf). Alternatively, sign up at zeropointlogic.io, copy your zpl_u_... key, and manually add it to your MCP client configuration with the ZPL_API_KEY environment variable. Set ZPL_MODE to pure (default) or coach to control how AIN scores are returned.

Key features of ZPL Engine MCP

• 68 tools across 11 analysis domains
• Bias detection, stability scoring, and neutrality analysis
• Free tier: 5,000 tokens/month, no credit card required
• Pure mode hides numeric scores from AI to prevent observer effect
• One-command setup wizard auto-configures multiple MCP clients
• Engine URL hardening with hostname allowlist and redirect blocking
• Backwards compatible with legacy API keys and all v3 tool signatures

Use cases of ZPL Engine MCP

• Analyze financial market stability and portfolio bias
• Audit gaming economy fairness (loot, matchmaking, gacha)
• Evaluate AI/ML model fairness, prediction bias, and dataset balance
• Assess security vulnerability distribution and risk matrices
• Measure crypto whale concentration, DeFi risk, and liquidity
• Verify certification language balance in text, news, and reviews

FAQ from ZPL Engine MCP

How do I get started with ZPL Engine MCP?

Run npx zpl-engine-mcp@latest setup in your terminal. The wizard opens your browser to authenticate your ZPL account (free, 5,000 tokens/month, no credit card), creates an API key, and automatically patches the MCP config for Claude Desktop, Cursor, and Windsurf if installed.

What is the difference between pure and coach mode?

In pure mode (default), the AIN (AI Neutrality Index) score is hidden from the AI on text-evaluation tools (zpl_check_response, zpl_news_bias, zpl_review_bias). This prevents the observer effect where the AI’s output may drift to justify the score. In coach mode, the numeric score is exposed to the AI on all tools.

What is the free plan quota?

The free plan provides 5,000 tokens per month. This is the correct limit as of v3.6.1; earlier documentation incorrectly stated 500 tokens.

Can I use ZPL Engine MCP with a local or self-hosted engine?

Yes. For a self-hosted engine, set ZPL_ENGINE_HOST_ALLOWLIST=your.hostname. For local HTTP (e.g., http://127.0.0.1:PORT), also set ZPL_ENGINE_ALLOW_INSECURE_LOCAL=1. The default allowlist only permits engine.zeropointlogic.io.

Which MCP clients are supported and auto-configured?

The setup wizard auto-configures Claude Desktop (claude_desktop_config.json), Cursor (~/.cursor/mcp.json), and Windsurf (~/.codeium/windsurf/mcp_config.json). Clients that aren’t installed are skipped silently. For other clients (Claude Code, VS Code, Zed), the wizard prints the JSON snippet to paste manually.