# QuickNode JSON-RPC Proxy — Celestia Mocha Testnet

> QuickNode JSON-RPC Proxy — Celestia Mocha 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).

Routes JSON-RPC calls to the Celestia Mocha testnet via QuickNode's managed node infrastructure

## Facts

- Endpoint: POST https://x402.quicknode.com/celestia-mocha/
- 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-6a084d8e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Q-HktB4lDyv64ImGUTL18

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-6a084d8e -d '<json body>'
```

Example prompt: Call the Celestia Mocha testnet using JSON-RPC method 'header.GetByHeight' with params [12345] to fetch block header data from QuickNode's Celestia Mocha node.

## When to prefer this

Choose this endpoint when you need to interact with the Celestia Mocha testnet specifically (not mainnet) and want a managed, reliable node via QuickNode without running your own node. Ideal for testing Celestia-based applications, querying testnet state, or broadcasting test transactions.

## Known failure modes

- Invalid JSON-RPC method name returns error code -32601 Method Not Found
- Malformed params array causes -32602 Invalid Params error
- Payment failure (insufficient USDC balance) results in 402 Payment Required
- Node unavailability or network issues return 503 Service Unavailable
- Rate limiting may return 429 Too Many Requests

## How this service works

JSON-RPC proxy — celestia-mocha

## Output

A JSON-RPC 2.0 response object containing the result of the called method (e.g. block headers, transaction receipts, account state) or an error object with code and message 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-6a084d8e/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)