# Free Asset Radar x402 – EVM Gas Estimator

> Free Asset Radar x402 – EVM Gas Estimator is a paid API for AI agents from free-asset-radar-x402.besenok2018.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-20).

Estimates EVM transaction gas price, gas units, and total fee in wei for a given network

## Facts

- Endpoint: GET https://free-asset-radar-x402.besenok2018.workers.dev/api/x402/evm-estimate-gas?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/free-asset-radar-x402-evm-gas-estimator-14a06a90
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xZF-WuD-HWNG3BS-VBhMc

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 free-asset-radar-x402-evm-gas-estimator-14a06a90
```

Example prompt: What's the current estimated gas cost in wei for a standard transaction on the Base network right now?

## When to prefer this

Use this endpoint when an autonomous agent or application needs a fast, edge-hosted EVM gas estimate — particularly on Base — without running its own RPC node. Ideal for pre-flight cost checks before submitting transactions, enforcing budget caps in agent workflows, or deciding whether current gas conditions make a transaction economical.

## Known failure modes

- Unsupported or unrecognized network identifier returns an error
- Network RPC unavailable or congested may return stale or no data
- Missing required query parameters results in a validation error
- Rate limiting or payment failure (x402) blocks the request

## How this service works

Stable edge-hosted x402 utilities for autonomous agents.

## Output

Returns a JSON object with the network name (e.g. 'base'), current gas price in wei (gasPriceWei), estimated gas units (estimatedGas), and the total estimated transaction fee in wei (estimatedFeeWei).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "network": "base",
  "gasPriceWei": "5000000",
  "estimatedGas": "21000",
  "estimatedFeeWei": "105000000000"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/free-asset-radar-x402-evm-gas-estimator-14a06a90/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from free-asset-radar-x402.besenok2018.workers.dev](https://www.zero.xyz/host/free-asset-radar-x402.besenok2018.workers.dev/llms.txt)