---
title: "Pay for RPC one request at a time with x402"
description: "Call RPC on 16 chains at x402.erpc.global and pay for each request in USDC or EURC, with no ERPC account or RPC key."
canonical: "https://erpc.global/en/doc/x402/overview/"
locale: "en"
---

# Pay for RPC one request at a time with x402

x402.erpc.global sells RPC for 16 chains one request at a time. Send a request, pay the price it answers with in USDC or EURC, and get the result. You need no ERPC account, RPC key or plan.

[Make a paid request](https://erpc.global/en/doc/x402/quickstart/ "button") [See how requests are priced](https://erpc.global/en/doc/x402/pricing/ "button")

```bash
curl -i https://x402.erpc.global/v1/solana-mainnet \
  --header 'Content-Type: application/json' \
  --data '{"jsonrpc":"2.0","id":1,"method":"getSlot"}'
```

## What you can do with x402

- Call 16 chains at one host, each at its own route.
- Pay for every chain with the same stablecoin from your own wallet: USDC on Solana, or USDC or EURC on Base. You need no SOL or ETH for network fees.
- See the price before you pay. The 402 response states it, and /pricing lists each route's method prices for free.
- Pay nothing for a request x402.erpc.global refuses. It checks the method, the body and the batch size before it asks for payment.
- Keep a settlement receipt. Every paid answer carries one in the X-Payment-Response header.

## How a paid request works

1. Send the RPC request as usual. x402.erpc.global answers 402 Payment Required, with the price and the payment options.
2. Your x402 client, the software that turns the 402 into a payment signed from your wallet, signs a payment for that price: a USDC transfer on Solana, or a USDC or EURC transfer authorization on Base.
3. Send the same request again, with the signed payment in the X-Payment header.
4. Once the payment is verified and settled, x402.erpc.global sends the request on to the chain and returns the answer with the receipt in the X-Payment-Response header.

Whichever chain you call, the payment settles on Solana or Base.

## Chains and routes

Every route takes HTTP POST at https://x402.erpc.global. JSON-RPC routes take a single call or a batch of up to 100 calls.

| Chain | Route | Requests |
| --- | --- | --- |
| Solana | `/v1/solana-mainnet` | JSON-RPC |
| Ethereum | `/v1/eth-mainnet` | JSON-RPC |
| Avalanche | `/v1/ava-mainnet` | JSON-RPC (a batch holds C-Chain calls only), and the AvalancheGo APIs at `/v1/ava-mainnet/ext/…` |
| Arbitrum | `/v1/arbitrum-mainnet` | JSON-RPC |
| Base | `/v1/base-mainnet` | JSON-RPC |
| Bitcoin | `/v1/bitcoin-mainnet` | JSON-RPC |
| Hyperliquid | `/v1/hyperliquid-mainnet` | JSON-RPC, also at `/v1/hyperliquid-mainnet/evm` and `…/nanoreth` |
| Kaia | `/v1/kaia-mainnet` | JSON-RPC |
| Monad | `/v1/monad-mainnet` | JSON-RPC |
| NEAR | `/v1/near-mainnet` | JSON-RPC |
| Optimism | `/v1/optimism-mainnet` | JSON-RPC |
| Polygon | `/v1/polygon-mainnet` | JSON-RPC |
| Robinhood Chain | `/v1/robinhood-mainnet` | JSON-RPC |
| Soneium | `/v1/soneium-mainnet` | JSON-RPC |
| Sui | `/v1/sui-mainnet/sui.rpc.v2.<Service>/<Method>` | gRPC-web unary calls, one per request |
| TRON | `/v1/tron-mainnet` | JSON-RPC, also at `/jsonrpc`, and the HTTP API at `/wallet/<method>` and `/walletsolidity/<method>`, one call per request |

WebSocket subscriptions, such as `eth_subscribe`, are not sold.

## Payment options

| Stablecoin | Network | Contract or mint address |
| --- | --- | --- |
| USDC | Solana | `EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v` |
| USDC | Base | `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` |
| EURC | Base | `0x60a3E35Cc302bFA44Cb288Bc5a4F316Fdb1adb42` |

Each 402 response also carries a `howToPay` block with the stablecoins that request accepts and their contract addresses, so an agent can pay from the response alone.

## Free endpoints

| Endpoint | What it returns |
| --- | --- |
| `GET /pricing` | The price of every method on every route |
| `GET /.well-known/x402` | The routes and the payment options, for x402 clients |
| `GET /doc` | The OpenAPI document of every route |
| `GET /scalar` | The same document as a browsable reference |

## Scope of use

The paid routes on this page are for paying ERPC RPC usage fees through x402. They do not provide crypto asset exchange, brokerage, custody or wallet services.