# Phantom API — Soneium RPC Endpoint

> Phantom API — Soneium 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 pay-per-call JSON-RPC access to the Soneium blockchain network, enabling queries of on-chain data and smart contract state.

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/soneium/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-soneium-rpc-endpoint-5a8c7f22
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HmXk-eHpVXmQ8Lq50swjw

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-soneium-rpc-endpoint-5a8c7f22 -d '<json body>'
```

Example prompt: What's the current ETH balance of address 0xAbC...123 on the Soneium network? Use eth_getBalance with the latest block tag.

## When to prefer this

Choose this endpoint when you specifically need RPC access to the Soneium network and want pay-per-call pricing via x402 without managing your own node or subscription. Prefer it over self-hosted solutions when low-latency, serverless, and micropayment-friendly access to Soneium on-chain data is required.

## Known failure modes

- Invalid JSON-RPC method name returns an error object with code -32601
- Malformed params array causes a parse or invalid params error (-32602)
- Network congestion or node unavailability may cause timeout or 503 response
- Unsupported Soneium-specific method returns method not found error
- Insufficient x402 payment causes 402 Payment Required before RPC is processed

## 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

A standard JSON-RPC response object containing a result field (or error field) corresponding to the requested Soneium RPC method — e.g. hex-encoded balances, block objects, transaction receipts, or raw contract return data.

## 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-soneium-rpc-endpoint-5a8c7f22/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)