Client / Agent → POST /mcp/tools/call (without API Key)
               ← 401 Unauthorized + pricing options ($0.50 USD / call)

User / Agent   → Buys credit pack via Stripe Checkout (/buy?amount=10)
               ← Receives unique API Key pre-loaded with balance

Client / Agent → POST /mcp/tools/call + Authorization: Bearer <API_KEY>
               ← 200 OK + Tool results + Remaining balance ($0.50 deducted)

curl -X POST "https://x402-mcp-server-production.up.railway.app/mcp/tools/call" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "tool": "generate_synthetic_data",
    "arguments": {"count": 3, "schema_type": "user_profile"}
  }'

import httpx

headers = {"Authorization": "Bearer YOUR_API_KEY"}
payload = {
    "tool": "generate_synthetic_data",
    "arguments": {"count": 3, "schema_type": "user_profile"}
}

response = httpx.post(
    "https://x402-mcp-server-production.up.railway.app/mcp/tools/call",
    json=payload,
    headers=headers
)
print(response.json())

# Connect this server
npx -y smithery mcp add arif-sakib/x402-mcp-server

# List tools
npx -y smithery tool list arif-sakib/x402-mcp-server