Sats4AI — Bitcoin-Powered AI Tools

Sats4AI is an MCP server that gives you access to 10+ AI tools, paid per use with Bitcoin Lightning. No API key, no signup — the Lightning payment is the only authentication.

Setup

Add the Sats4AI MCP server to your openclaw.json:

{
  "mcpServers": {
    "sats4ai": {
      "url": "https://sats4ai.com/api/mcp"
    }
  }
}

That's it. You now have access to all tools below.

You Need a Lightning Wallet

To pay invoices, add a wallet MCP server alongside Sats4AI. The easiest options:

Option A: Lightning Wallet MCP (recommended)

npm install -g lightning-wallet-mcp
lw register --name "my-agent"   # save the API key
lw deposit 10000                # fund with any wallet

Option B: Alby MCP Server

{
  "mcpServers": {
    "sats4ai": {
      "url": "https://sats4ai.com/api/mcp"
    },
    "wallet": {
      "command": "npx",
      "args": ["-y", "@getalby/mcp"],
      "env": {
        "NWC_CONNECTION_STRING": "nostr+walletconnect://YOUR_CONNECTION_STRING"
      }
    }
  }
}

Get your NWC connection string from Alby Hub.

Available Tools

After connecting, you can call these tools:

Payment Flow

1. create_payment — Get a Lightning invoice for any service. Specify the tool and model.
2. Pay the invoice — Using your wallet (Lightning Wallet MCP, Alby, or any Lightning wallet).
3. Call the tool — Pass the paymentId to execute the service.

AI Tools

Example: Generate an Image

1. Call create_payment with tool: "image", model: "Best"
2. Pay the returned Lightning invoice (e.g., lw pay <invoice>)
3. Call generate_image with paymentId, prompt: "a sunset over mountains", model: "Best"
4. Receive base64 image data

Example: Generate Text with Kimi K2.5

1. Call create_payment with tool: "text-generation", model: "Best"
2. Pay the Lightning invoice (~15 Sats minimum)
3. Call generate_text with paymentId and your messages
4. Receive the text response

Kimi K2.5 rivals Claude 4.6 and GPT-5.2 in coding, math, and reasoning — at ~$0.006 per request.

L402 Alternative

You can also use Sats4AI via L402 endpoints with lnget:

lnget --max-cost 500 POST https://sats4ai.com/api/l402/image \
  -d '{"input":{"prompt":"a sunset over mountains"},"model":"Best"}'

No MCP needed — lnget auto-pays the Lightning invoice on 402 responses.

Privacy

• No signup, no account, no email
• No API key — payment is the credential
• No KYC or identity verification
• No prompts or outputs logged

Links

• Website: https://sats4ai.com
• OpenClaw guide: https://sats4ai.com/openclaw
• MCP docs: https://sats4ai.com/mcp
• L402 docs: https://sats4ai.com/l402
• Service discovery: https://sats4ai.com/.well-known/l402-services