PathCourse Health (PCH)
Cheaper LLM inference, USDC agent payments via x402, agent identity / reputation lookup.
Runs on your machine from its package; the steps are below.
What it does
- Reads
- Writes
- High impact
At most: moves money, runs code or commands, deletes data, or sends messages for you.
What it costs
FreeOdel charges nothing per call. The publisher may charge for its own service.
Runs locally over stdio
This server isn't hosted — your MCP client launches it from a package registry. Use one of the commands below, or drop the config into your client (e.g. Claude Desktop).
Run
npx -y @pathcourse/mcp-server
MCP client config
{
"mcpServers": {
"pathcourse-health-pch": {
"command": "npx",
"args": [
"-y",
"@pathcourse/mcp-server"
]
}
}
}Run
uvx pch-mcp-server
MCP client config
{
"mcpServers": {
"pathcourse-health-pch": {
"command": "uvx",
"args": [
"pch-mcp-server"
]
}
}
}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.
