# QuickNode JSON-RPC Proxy — Monad Mainnet

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

Proxies JSON-RPC calls to the Monad mainnet blockchain via QuickNode's infrastructure

## Facts

- Endpoint: POST https://x402.quicknode.com/monad-mainnet/
- 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-ca2c6630
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1R5JPPG9WNQHLCIX9FQQb

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-ca2c6630 -d '<json body>'
```

Example prompt: Call eth_blockNumber on the Monad mainnet blockchain and tell me the latest block height.

## When to prefer this

Use this endpoint when you need to interact specifically with the Monad mainnet blockchain via JSON-RPC. Prefer this over other QuickNode endpoints when the target chain is Monad (not Ethereum, Arbitrum, or other chains). Suitable for reading chain state, submitting transactions, or calling smart contracts on Monad.

## Known failure modes

- Invalid JSON-RPC method name returns error object
- Malformed params array causes parse error
- Network congestion may increase latency
- Payment failure returns HTTP 402 before request is processed
- Unsupported method for Monad returns method-not-found error

## How this service works

JSON-RPC proxy — monad-mainnet

## Output

Returns a standard JSON-RPC 2.0 response containing the result of the requested method (e.g., block data, transaction info, account balance, contract return value) or an error object 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-ca2c6630/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)