# Phantom API — Kaia Gas Estimator

> Phantom API — Kaia Gas Estimator 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 costs for a transaction on the Kaia blockchain network before execution

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/kaia/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-kaia-gas-estimator-4584fd03
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1WllAKfnXmh33PQPvfBuc

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-kaia-gas-estimator-4584fd03 -d '<json body>'
```

Example prompt: Estimate the gas needed to call this Kaia smart contract — sending from 0xAbC123... to 0xDef456..., with calldata 0xa9059cbb000... and a value of 0 KAIA.

## When to prefer this

Use this endpoint when you need to estimate gas specifically on the Kaia blockchain network before sending a transaction. Ideal for DApp developers, DeFi bots, and wallet agents that need to pre-validate transaction costs on Kaia without executing a real transaction. Prefer over generic RPC calls when you want a pay-per-call, infrastructure-free approach without running your own node.

## Known failure modes

- Invalid or malformed address in 'to' or 'from' fields returns an error
- Malformed calldata in 'data' field causes estimation failure
- Transaction would revert on-chain — estimator returns revert error or zero gas
- Network congestion or RPC node unavailability causes timeout
- Missing required fields returns 400-level validation error
- Payment not included or insufficient — returns 402 Payment Required

## 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 an estimated gas amount (in gas units) needed to execute the specified transaction on the Kaia network, allowing callers to budget fees and validate transaction feasibility 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-kaia-gas-estimator-4584fd03/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)