# QuickNode JSON-RPC Proxy — Sui Mainnet

> QuickNode JSON-RPC Proxy — Sui Mainnet 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 mainnet blockchain, enabling reads and writes via standard JSON-RPC 2.0 methods

## Facts

- Endpoint: POST https://x402.quicknode.com/sui-mainnet/
- 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-8cb28f5b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_m52YkXnwGHpC8GwdovAx_

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-8cb28f5b -d '<json body>'
```

Example prompt: Call the Sui mainnet RPC using the suix_getBalance method with owner address 0x1234abcd... and coinType 0x2::sui::SUI to get the current SUI balance for that address.

## When to prefer this

Use this endpoint when you need direct, low-latency access to the Sui mainnet blockchain via JSON-RPC — especially for reading chain state, querying objects, fetching balances, or submitting transactions. Prefer this over other providers when you need a pay-per-call model with no subscription setup, or when QuickNode's infrastructure reliability and Sui-specific RPC coverage is needed.

## Known failure modes

- Invalid JSON-RPC method name returns method not found error
- Malformed params array causes invalid params error
- Network congestion on Sui mainnet causes timeout
- Expired or invalid x402 payment results in 402 Payment Required
- Requesting data for a non-existent object or address returns null result
- Submitting an invalid or already-processed transaction returns execution error

## How this service works

JSON-RPC proxy — sui-mainnet

## Output

Returns a standard JSON-RPC 2.0 response object containing the result of the requested Sui RPC method call — could include object data, balances, transaction effects, event lists, or other chain state depending on the method invoked.

## 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-8cb28f5b/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)