# Phantom API — MegaETH Gas Estimate

> Phantom API — MegaETH Gas Estimate 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).

Estimates gas cost for a transaction on the MegaETH network given recipient, calldata, sender, and value

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/megaeth/gas/estimate
- 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-megaeth-gas-estimate-ac708ab8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1qdU6XltIJMSN0s38FdvQ

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-megaeth-gas-estimate-ac708ab8 -d '<json body>'
```

Example prompt: Estimate the gas needed to call this contract on MegaETH — the recipient is 0xAbC...123, the calldata is 0xa9059cbb...000, sent from 0xDef...456 with a value of 0 ETH.

## When to prefer this

Use this endpoint when you need a fast, pay-per-call gas estimate specifically on the MegaETH network without managing your own RPC node. Prefer this over general-purpose Ethereum gas estimators when targeting MegaETH specifically, and over subscription-based node providers when you want usage-based pricing via x402.

## Known failure modes

- Invalid or malformed address in 'to' or 'from' fields returns an error
- Malformed or non-hex calldata causes a parse error
- Transaction simulation reverts (e.g. insufficient balance, bad calldata) returns a revert error
- Network unavailability or RPC timeout causes a service error
- Missing required fields may return a validation error

## 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 gas estimate (in gas units) for the described transaction on the MegaETH network, allowing agents to forecast transaction costs and determine if sufficient funds are available before broadcasting.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "to": {
   "type": "string"
  },
  "data": {
   "type": "string"
  },
  "from": {
   "type": "string"
  },
  "value": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/phantom-api-megaeth-gas-estimate-ac708ab8/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)