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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

Related MCP server: Agent Identity 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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