# x402 Facilitator

## What is a Facilitator?

The facilitator is a service that:

* Verifies payment payloads submitted by clients.
* Settles payments on the blockchain on behalf of servers.

By using a facilitator, servers do not need to maintain direct blockchain connectivity or implement payment verification logic themselves. This reduces operational complexity and ensures accurate, real-time validation of transactions.

## Facilitator Responsibilities

* **Verify payments:** Confirm that the client's payment payload meets the server's declared payment requirements.
* **Settle payments:** Submit validated payments to the blockchain and monitor for confirmation.
* **Provide responses:** Return verification and settlement results to the server, allowing the server to decide whether to fulfill the client's request.

The facilitator does not hold funds or act as a custodian - it performs verification and execution of onchain transactions based on signed payloads provided by clients.

## Why Use a Facilitator?

Using a facilitator provides:

* **Reduced operational complexity:** Servers do not need to interact directly with blockchain nodes.
* **Protocol consistency:** Standardized verification and settlement flows across services.
* **Faster integration:** Services can start accepting payments with minimal blockchain-specific development.

While it is possible to implement verification and settlement locally, using a facilitator accelerates adoption and ensures correct protocol behavior.

## AWE World.fun Facilitator

AWE World.fun operates a hosted facilitator service.

<figure><img src="/files/3T2metFf6BHuB2SlcJjo" alt=""><figcaption></figcaption></figure>

### **AWE World.fun's x402 Facilitator**

World.fun's x402 facilitator offers:

* Fee-free USDC payments on Base: It currently processes transactions without additional fees, allowing sellers to receive 100% of the payment.
* Flexible token support: Any ERC-20 token that implements EIP-3009 can be used as the payment asset.
* High performance settlement: Payments are submitted to the Base network with fast confirmation times and high throughput.

Using World.fun's facilitator allows sellers to quickly integrate payments without managing blockchain infrastructure, while providing a predictable and low-cost experience for buyers.

### **How It Works**

To accept World.fun payments, just add:

<pre class="language-javascript"><code class="lang-javascript"><strong>import express from "express";
</strong><strong>import { paymentMiddleware } from "x402-express";
</strong>
<strong>const app = express();
</strong>
<strong>app.use(paymentMiddleware(
</strong><strong>    "0xYourAddress", // your receiving wallet address
</strong><strong>    {  // Route configurations for protected endpoints
</strong>    "GET /weather": {
<strong>        // USDC amount in dollars
</strong>        price: "$0.001",
        network: "base",
<strong>        // Optional: Add metadata for better discovery in x402 Bazaar
</strong>        config: {
        description: "Get current weather data for any location",
        inputSchema: {
            type: "object",
            properties: {
            location: { type: "string", description: "City name" }
            }
        },
        outputSchema: {
            type: "object",
            properties: {
            weather: { type: "string" },
            temperature: { type: "number" }
            }
        }
        }
    },
    },
    {
    url: "https://facilitator.world.fun",
    }
));
</code></pre>

It also supports the Next.js and Hono frameworks for Node.js, as well as the FastAPI and Flask frameworks for Python.

## Supported Networks

* Base (Mainnet)


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