# Phantom API — opBNB RPC Endpoint

> Phantom API — opBNB RPC Endpoint is a paid API for AI agents from phantom-api-omega.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Provides JSON-RPC access to the opBNB blockchain network for querying on-chain data and interacting with smart contracts, billed per call via x402.

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/opbnb/rpc
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/phantom-api-opbnb-rpc-endpoint-95e36349
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SzwyYm0Ixb4XfA6XYqFaQ

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 phantom-api-opbnb-rpc-endpoint-95e36349 -d '<json body>'
```

Example prompt: What's the current ETH balance of wallet 0xAbC123... on the opBNB network? Use eth_getBalance with block tag 'latest'.

## When to prefer this

Choose this endpoint when you specifically need RPC access to the opBNB Layer 2 network (BNB Chain L2) and want pay-per-call pricing via x402 instead of managing an API key subscription. Prefer this over free public RPC nodes when reliability and speed matter for production agent workflows.

## Known failure modes

- Invalid JSON-RPC method name returns error code -32601 (method not found)
- Malformed params array causes -32602 (invalid params) error
- Node unavailability or rate limiting returns HTTP 503 or RPC error
- Payment failure via x402 returns HTTP 402 before the RPC call is processed
- Requesting a non-existent block or transaction returns null result

## How this service works

Lightning-fast access to blockchain data, smart contract insights, and Web3 infrastructure across 57+ networks. Pay-per-call via x402.

## Output

Returns a standard JSON-RPC response object with a result field containing the blockchain data requested (e.g. balance in hex wei, block object, transaction receipt, contract return value) or an error object with code and message if the call fails.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "method": {
   "type": "string"
  },
  "params": {
   "type": "array",
   "items": {}
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/phantom-api-opbnb-rpc-endpoint-95e36349/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from phantom-api-omega.vercel.app](https://www.zero.xyz/host/phantom-api-omega.vercel.app/llms.txt)