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.

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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.

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Demo

npx proxypi

<pre> <span style="color: #22d3ee">▶</span> <span style="color: #a855f7">proxypi</span> sending → POST https://api.example.com/users <span style="color: #f59e0b">⚠</span> <span style="color: #a855f7">proxypi</span> 422 — checking memory for known fix... <span style="color: #22d3ee">▶</span> <span style="color: #a855f7">proxypi</span> healing attempt 1 — asking Claude to diagnose... <span style="color: #22d3ee">▶</span> <span style="color: #a855f7">proxypi</span> retrying with patch: body uses 'name' but API expects 'full_name' <span style="color: #22c55e">✔</span> <span style="color: #a855f7">proxypi</span> healed in 1 attempt — 200 — 1843ms </pre>

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Install

npx proxypi

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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.

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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

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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

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More

• 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