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Cheaper LLM inference, USDC agent payments via x402, agent identity / reputation lookup.
About
Cheaper LLM inference, USDC agent payments via x402, agent identity / reputation lookup.
Security Report
4.8
Use Caution4.8High RiskThis is a well-structured MCP server wrapper for PathCourse Health with appropriate authentication controls and reasonable permission scope. The codebase demonstrates good security practices: API keys are read from environment variables only, authentication is enforced on sensitive operations, and user input is properly validated before making HTTP requests. Minor code quality observations exist but do not constitute security vulnerabilities. Supply chain analysis found 11 known vulnerabilities in dependencies (0 critical, 9 high severity). Package verification found 2 issues.
7 files analyzed · 17 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
What You'll Need
Set these up before or after installing:
Your PCH API key (format: pch_prod_b_...). Optional — many tools work without it. Mint one via the pch_provision tool by sending 5 USDC on Base.Required
Environment variable: PCH_API_KEY
Override the PCH gateway URL. Defaults to https://gateway.pathcoursehealth.com (production mainnet).
Environment variable: PCH_GATEWAY_URL
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-pathcourse-health-mcp-server": {
"env": {
"PCH_API_KEY": "your-pch-api-key-here",
"PCH_GATEWAY_URL": "your-pch-gateway-url-here"
},
"args": [
"-y",
"@pathcourse/mcp-server"
],
"command": "npx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
PCH MCP Server
Drop-in MCP server for PathCourse Health (PCH) — cheaper LLM inference, USDC-based agent payments, and agent identity / reputation lookup. Works in Claude Desktop, Cursor, Cline, Continue.dev, and Zed.
14 tools. 7 free (no API key needed) and 7 authenticated. Includes a unique flow that lets you buy a PCH API key from inside Claude Desktop using USDC — no signup form, no email verification.
Install
Claude Desktop, Cursor, Cline, Continue.dev, Zed (npm)
Add to your client's MCP config:
{
"mcpServers": {
"pch": {
"command": "npx",
"args": ["-y", "@pathcourse/mcp-server"],
"env": {
"PCH_API_KEY": "pch_prod_b_..."
}
}
}
}
If you don't have a PCH API key yet, omit the env block. Many tools work without authentication; you can obtain a key via the pch_provision tool.
Per-client install instructions:
Python clients (PyPI)
uvx pch-mcp-server
# or
pip install pch-mcp-server
Tools
Free (no API key)
| Tool | What it does |
|---|---|
pch_models | List all PCH models with rates and tier requirements |
pch_estimate | Estimate cost of an inference request before running it |
pch_status | Gateway health and service status |
pch_provision | Get USDC payment instructions to obtain an API key |
pch_pay | Submit USDC payment proof; returns API key + first inference |
pch_lookup_agent_identity | Lookup an agent's ERC-8004 identity record |
pch_get_path_score | Look up an agent's Path Score (0-1000) |
pch_get_agent_history | 12-month trend of an agent's score components |
pch_verify_certification | Verify a PCH-issued certification |
pch_compare_costs | Compare PCH model cost vs GPT-4o, Claude Sonnet, Claude Haiku |
Authenticated (PCH_API_KEY required)
| Tool | What it does |
|---|---|
pch_inference | Run LLM inference on a PCH model |
pch_balance | Check remaining USDC balance and current tier |
pch_check_agent_reputation | Deeper reputation lookup ($0.001 USDC per query) |
pch_my_account | Self-service balance + identity + recent activity |
Configuration
| Env var | Default | Notes |
|---|---|---|
PCH_API_KEY | (none) | Required for authenticated tools. Format: pch_prod_b_... |
PCH_GATEWAY_URL | https://gateway.pathcoursehealth.com | Override for staging or local dev |
Security
Never commit PCH_API_KEY to a public repo. The wrapper logs a warning at startup if it detects a key that looks like a real production key being passed through env. If you accidentally exposed your key, rotate it via PCH support.
License
MIT
Source
This wrapper is open source: pathcourse-health/pch-mcp-server
The upstream PCH MCP server lives in the (private) pch-platform-gateway repo.
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