# QuickNode JSON-RPC Proxy — Plasma Mainnet

> QuickNode JSON-RPC Proxy — Plasma 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).

Routes JSON-RPC requests to the Plasma mainnet blockchain node via QuickNode's infrastructure

## Facts

- Endpoint: POST https://x402.quicknode.com/plasma-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-23965e3b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Nz4vDED-GpEsTFI5XG-rD

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-23965e3b -d '<json body>'
```

Example prompt: Can you fetch the latest block number on Plasma mainnet using eth_blockNumber?

## When to prefer this

Use this endpoint when you need to interact specifically with the Plasma mainnet blockchain — reading state, calling smart contracts, or broadcasting transactions — and want reliable, low-latency RPC access backed by QuickNode's infrastructure. Prefer this over self-hosted nodes when uptime and speed matter.

## Known failure modes

- Invalid JSON-RPC method name returns error code -32601
- Malformed params array returns error code -32602
- Payment failure (insufficient USDC) returns HTTP 402
- Network congestion may cause timeout
- Unsupported method on Plasma returns method not found error

## How this service works

JSON-RPC proxy — plasma-mainnet

## Output

A standard JSON-RPC 2.0 response object containing the result field with blockchain data (block info, transaction details, contract return values, etc.) 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-23965e3b/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)