# QuickNode JSON-RPC Proxy — BSC Mainnet

> QuickNode JSON-RPC Proxy — BSC 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 BNB Smart Chain (BSC) mainnet via QuickNode's node infrastructure

## Facts

- Endpoint: POST https://x402.quicknode.com/bsc-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-25852028
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dINBCKKKt5-cAGx8SyCLw

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-25852028 -d '<json body>'
```

Example prompt: Use QuickNode's BSC mainnet RPC to call eth_getBalance for address 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B and return the current BNB balance.

## When to prefer this

Choose this endpoint when you need reliable, low-latency access to BNB Smart Chain (BSC) mainnet JSON-RPC methods — such as querying balances, reading smart contract state, fetching transactions, or broadcasting signed transactions — and want to pay per call with USDC via x402 without managing node infrastructure or API key subscriptions.

## Known failure modes

- Invalid JSON-RPC method name returns error code -32601 (method not found)
- Malformed params array returns error code -32602 (invalid params)
- Non-existent block or transaction hash returns null result
- Payment failure or insufficient USDC balance blocks the request
- Rate limiting or node downtime returns 5xx HTTP error
- Calling a write method (eth_sendRawTransaction) with an unsigned or malformed tx returns execution error

## How this service works

JSON-RPC proxy — bsc-mainnet

## Output

A JSON-RPC 2.0 response object containing the result of the requested BSC mainnet method call — e.g. a hex-encoded block number, balance, transaction receipt, contract return value, or transaction hash, along with the matching request ID.

## 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-25852028/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)