# QuickNode JSON-RPC Proxy — XLayer Testnet

> QuickNode JSON-RPC Proxy — XLayer Testnet is a paid API for AI agents from x402.quicknode.com, paid per call via x402, $10/call, status unknown (last checked 2026-09-15).

Proxies JSON-RPC calls to the XLayer testnet blockchain network via QuickNode infrastructure

## Facts

- Endpoint: POST https://x402.quicknode.com/xlayer-testnet/
- Price: $10/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quicknode-910e2411
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7zkPJdvIiHNiI5221psj_

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability quicknode-910e2411 -d '<json body>'
```

Example prompt: Call eth_getBalance on XLayer testnet for address 0xYourAddress using QuickNode's JSON-RPC proxy — use jsonrpc 2.0, method eth_getBalance, with the address and 'latest' as params.

## When to prefer this

Use this endpoint when you need to interact specifically with the XLayer testnet EVM network via standard JSON-RPC, particularly when other free RPC endpoints are unavailable or unreliable and you are willing to pay per call via x402 micropayments. Prefer this over self-hosted nodes when you need reliable QuickNode infrastructure without managing your own node.

## Known failure modes

- Invalid JSON-RPC method name returns error code -32601 method not found
- Malformed params array returns error code -32602 invalid params
- Network unavailable or testnet node unreachable returns HTTP 503 or JSON-RPC internal error -32603
- Payment not completed or insufficient USDC balance returns HTTP 402 Payment Required
- Rate limit exceeded may return HTTP 429

## How this service works

JSON-RPC proxy — xlayer-testnet

## Output

Returns a standard JSON-RPC 2.0 response object containing the result of the requested method (e.g. block number as hex, balance in wei, transaction receipt object, or contract return data), along with the matching request id and jsonrpc version field.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "jsonrpc",
  "method"
 ],
 "properties": {
  "id": {
   "type": [
    "number",
    "string"
   ],
   "description": "Request identifier"
  },
  "method": {
   "type": "string",
   "description": "JSON-RPC method name (e.g., eth_blockNumber, eth_call)"
  },
  "params": {
   "type": "array",
   "description": "Method parameters"
  },
  "jsonrpc": {
   "type": "string",
   "const": "2.0"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "id": {
   "type": [
    "number",
    "string"
   ]
  },
  "error": {
   "type": "object",
   "properties": {
    "code": {
     "type": "integer"
    },
    "message": {
     "type": "string"
    }
   }
  },
  "result": {
   "description": "RPC result (type varies by method)"
  },
  "jsonrpc": {
   "type": "string",
   "const": "2.0"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quicknode-910e2411/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.quicknode.com](https://www.zero.xyz/host/x402.quicknode.com/llms.txt)