MCP Billing Gateway

Add Stripe subscriptions, per-call credits, and x402 crypto payments to any MCP server — without writing billing code.

Live service: https://mcp-billing-gateway-production.up.railway.app

What it does

MCP Billing Gateway is a proxy that sits in front of your MCP server and handles all billing automatically:

• Per-call billing — charge callers per tool call (fiat or crypto)

• Subscriptions — monthly/annual Stripe plans with call limits

• Tiered pricing — free tier + paid tiers based on usage

• x402 micropayments — accept USDC on Base from AI agents with no API keys

• Operator dashboard — track revenue, usage, and callers in real time

How it works

AI Agent → MCP Billing Gateway → Your MCP Server
            (billing enforced here)

1. Register as an operator

2. Register your MCP server URL + pricing plan

3. Point callers to your proxy slug: https://mcp-billing-gateway.../proxy/{your-slug}/...

4. Callers pay via Stripe API key or x402 USDC — billing is handled transparently

Quick Start

Register as operator

curl -X POST https://mcp-billing-gateway-production.up.railway.app/api/v1/operator/register \
  -H "Content-Type: application/json" \
  -d '{"email": "you@example.com", "name": "Your Name"}'

Register your MCP server

curl -X POST https://mcp-billing-gateway-production.up.railway.app/api/v1/servers \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "My MCP Server",
    "upstream_url": "https://your-mcp-server.com/mcp",
    "proxy_slug": "my-server"
  }'

Create a pricing plan

curl -X POST https://mcp-billing-gateway-production.up.railway.app/api/v1/servers/{server_id}/plans \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Pay as you go",
    "billing_model": "per_call",
    "price_per_call_usd_micro": 10000,
    "free_calls_per_month": 100
  }'

Callers connect to your proxied server

{
  "mcpServers": {
    "my-server": {
      "url": "https://mcp-billing-gateway-production.up.railway.app/proxy/my-server/mcp",
      "headers": {
        "Authorization": "Bearer CALLER_API_KEY"
      }
    }
  }
}

Payment Methods

Operator Dashboard

Access your dashboard at:

https://mcp-billing-gateway-production.up.railway.app/dashboard

Track revenue, usage, active callers, and configure your servers.

API Reference

Full API docs at: https://mcp-billing-gateway-production.up.railway.app/health

Operator endpoints

• POST /api/v1/operator/register — create operator account

• GET /api/v1/operator/profile — view profile and API keys

• GET /api/v1/operator/stats — revenue and usage stats

Server management

• POST /api/v1/servers — register an MCP server

• GET /api/v1/servers — list your servers

• POST /api/v1/servers/{id}/plans — create pricing plan

Proxy

• * /proxy/{slug}/* — proxied calls with billing enforcement

Self-hosted

The gateway is open for use. If you need a self-hosted deployment, contact us.

License

MIT