ProxyPI

What it is

Self-healing API proxy MCP for Cursor, Claude Code, or any MCP-compatible client. Send any REST request — if it fails, ProxyPI reads the error, diagnoses the problem using Claude, patches the request, and retries. Successful fixes are remembered and applied instantly next time, without calling Claude.

How it works

You: proxypi_request → POST https://api.example.com/users

ProxyPI:  try → fail → diagnose (Claude) → patch → retry → remember

Next time the same error occurs on the same host and path, the fix is applied from memory instantly — no Claude call needed.

Demo

npx proxypi

Install

npx proxypi

Config

Add to .cursor/mcp.json (project root or ~/.cursor/mcp.json):

{
  "mcpServers": {
    "proxypi": {
      "command": "npx",
      "args": ["-y", "proxypi"],
      "env": {
        "ANTHROPIC_API_KEY": "your-api-key-here"
      }
    }
  }
}

Restart Cursor. Four tools: proxypi_request, proxypi_history, proxypi_replay, proxypi_clear.

Tools

Tool	Description
`proxypi_request`	Send any REST request — auto-heals on failure
`proxypi_history`	View past fixes, filter by API host
`proxypi_replay`	Re-run a stored fix to verify it still works
`proxypi_clear`	Wipe all healing records from memory

What ProxyPI can fix

Error	What ProxyPI does
`401 Unauthorized`	Fixes Authorization header format (Bearer vs Basic vs token prefix)
`400 Bad Request`	Fixes body field names, types, or missing required fields
`422 Unprocessable`	Corrects schema mismatches, enum values, date formats
`404 Not Found`	Fixes URL path, API version prefix, trailing slashes
`405 Method Not Allowed`	Switches to the correct HTTP method

Memory: Fixes stored in ~/.proxypi/memory.json
Env: ANTHROPIC_API_KEY required (only when using healing — server starts without it)
Local dev: cp .env.example .env, add key, then npm run dev
Tests: npm test

MIT · GitHub