# QuickNode JSON-RPC Proxy — Sui Testnet

> QuickNode JSON-RPC Proxy — Sui 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 Sui testnet blockchain, enabling agents to query balances, submit transactions, and interact with Sui smart contracts on the test network.

## Facts

- Endpoint: POST https://x402.quicknode.com/sui-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-194e896e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Hs1mxNEINF4nO7EU-re78

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-194e896e -d '<json body>'
```

Example prompt: Call suix_getBalance on the Sui testnet for address 0x1234...abcd using the QuickNode JSON-RPC proxy and tell me how much SUI it holds.

## When to prefer this

Choose this endpoint when you need to interact with the Sui testnet specifically — for development, testing, or staging workflows — rather than Sui mainnet. Prefer QuickNode's proxy for reliable, low-latency RPC access backed by enterprise infrastructure, especially when your agent workflow requires programmatic blockchain reads or writes via the standard Sui JSON-RPC interface.

## Known failure modes

- Invalid JSON-RPC method name returns error object with code and message
- Malformed params array causes parse or invalid-params error
- Sui testnet node unavailability returns 503 or timeout
- Payment not provided or insufficient USDC results in 402 Payment Required
- Network-specific methods called with wrong param types return execution errors

## How this service works

JSON-RPC proxy — sui-testnet

## Output

Returns a JSON-RPC 2.0 response object containing the result of the invoked Sui method — e.g., account balances, object details, transaction effects, event data, or epoch/chain metadata — or a structured error object if the call fails.

## 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-194e896e/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)