# QuickNode JSON-RPC Proxy — Hemi Testnet

> QuickNode JSON-RPC Proxy — Hemi Testnet is a paid API for AI agents from x402.quicknode.com, paid per call via x402, $10/call, status unknown (last checked 2026-09-14).

Proxies JSON-RPC calls to the Hemi testnet blockchain network via QuickNode's infrastructure, enabling standard Ethereum-compatible RPC method execution.

## Facts

- Endpoint: POST https://x402.quicknode.com/hemi-testnet/
- Price: $10/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quicknode-f82363a9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1VsJLpXwOspYRkypJRLwq

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-f82363a9 -d '<json body>'
```

Example prompt: Call eth_blockNumber on the Hemi testnet using QuickNode's RPC proxy so I can see what the latest block is right now.

## When to prefer this

Use this endpoint when you need to interact with the Hemi testnet specifically — for testing Hemi-based smart contracts, verifying testnet transactions, or developing applications before deploying to Hemi mainnet. Prefer this over generic Ethereum endpoints when the target chain is Hemi testnet, and over self-hosted nodes when you want reliable, managed RPC infrastructure without setup overhead.

## Known failure modes

- Invalid JSON-RPC method name returns error code -32601 (method not found)
- Malformed params array causes -32602 (invalid params) error
- Payment not provided or insufficient returns HTTP 402 Payment Required
- Network congestion or node downtime returns HTTP 503 or timeout
- Using mainnet contract addresses on testnet yields empty or zero results

## How this service works

JSON-RPC proxy — hemi-testnet

## Output

Returns a standard JSON-RPC 2.0 response object containing the result of the requested method call (e.g. block number, transaction receipt, contract return value) or an error object with code and message if the call failed.

## 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-f82363a9/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)