lightningprox-mcp

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MCP server for LightningProx — pay-per-request AI via Bitcoin Lightning. No accounts, no API keys. Load a spend token, start querying.

Install

npx lightningprox-mcp

What LightningProx Is

LightningProx is an AI gateway that accepts Bitcoin Lightning payments instead of API keys. You load a prepaid spend token, pass it in the X-Spend-Token header, and each request is deducted from your balance in sats. No signup, no monthly plan, no credentials to manage.

Models available: Claude (Sonnet, Haiku, Opus) and GPT-4 — accessed through a single endpoint with a single spend token.

Vision / multimodal: Pass image_url directly in your request. URL mode only — no base64 encoding required.

Setup

Claude Desktop

{
  "mcpServers": {
    "lightningprox": {
      "command": "npx",
      "args": ["lightningprox-mcp"]
    }
  }
}

Config location:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/claude/claude_desktop_config.json

Claude Code

claude mcp add lightningprox -- npx lightningprox-mcp

Tools

Tool	Description
ask_ai	Send a prompt to Claude or GPT, authenticated via spend token
ask_ai_vision	Send a prompt with an image URL for multimodal analysis
check_balance	Check remaining sats on a spend token
list_models	List available models with per-call pricing
get_pricing	Estimate cost in sats for a given model and token count
get_invoice	Generate a Lightning invoice to top up a spend token

Spend Token Auth

Every request authenticates via the X-Spend-Token header:

curl -X POST https://lightningprox.com/v1/chat \
  -H "Content-Type: application/json" \
  -H "X-Spend-Token: lnpx_your_token_here" \
  -d '{
    "model": "claude-sonnet-4-5",
    "messages": [{"role": "user", "content": "What is the Lightning Network?"}]
  }'

For vision requests, include image_url in the message content — no base64 needed:

curl -X POST https://lightningprox.com/v1/chat \
  -H "Content-Type: application/json" \
  -H "X-Spend-Token: lnpx_your_token_here" \
  -d '{
    "model": "claude-sonnet-4-5",
    "messages": [{
      "role": "user",
      "content": [
        {"type": "image_url", "image_url": {"url": "https://example.com/chart.png"}},
        {"type": "text", "text": "Describe this chart"}
      ]
    }]
  }'

Getting a Spend Token

1. Call get_invoice (or ask_ai without a token) to receive a Lightning invoice
2. Pay the invoice from any Lightning wallet
3. Your spend token is returned — use it for all subsequent requests until balance runs out

Links

• Gateway: lightningprox.com
• Docs: lightningprox.com/docs

Built by LPX Digital Group LLC