# Hearth EVM Gas Price Lookup

> Hearth EVM Gas Price Lookup is a paid API for AI agents from 138-197-15-135.sslip.io, paid per call via x402, $0.0009/call, status unknown (last checked 2026-10-30).

Returns current EVM gas price metrics (base fee, priority fee, max fee, transfer cost) for a specified blockchain network

## Facts

- Endpoint: GET https://138-197-15-135.sslip.io/v1/evm/gas?utm_source=zero.xyz
- Price: $0.0009/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/hearth-evm-gas-price-lookup-1532cae5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2jfTba90EJJk148vKwcGU

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 hearth-evm-gas-price-lookup-1532cae5
```

Example prompt: What are the current gas prices on Base — give me the base fee, priority fee, and estimated transfer cost in ETH?

## When to prefer this

Use this endpoint when you need real-time EVM gas price data for Base, Ethereum, Arbitrum, or Optimism and want a simple, pay-per-call API without managing RPC node subscriptions. Ideal for agents that need to estimate transaction costs before execution or monitor fee conditions across multiple EVM chains.

## Known failure modes

- Invalid chain parameter returns an error or defaults to Base
- Network connectivity issues to the target blockchain node may cause stale or unavailable data
- Unsupported chain name results in no data returned
- High network congestion may cause slight latency in retrieving latest block data

## How this service works

Web page to clean Markdown for AI agents. Pay per call with x402 (USDC on Base).

## Output

A JSON object containing the current block number, chain name, max fee in gwei, base fee in gwei, gas price in gwei, priority fee in gwei, and estimated ETH cost for a standard transfer on the specified EVM-compatible network.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "queryParams"
   ],
   "properties": {
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "chain": {
       "type": "string",
       "description": "Chain: base (default), ethereum, arbitrum, optimism"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "block": 1,
  "chain": "base",
  "maxFeeGwei": "0.011",
  "baseFeeGwei": "0.005",
  "gasPriceGwei": "0.01",
  "priorityFeeGwei": "0.001",
  "transferCostEth": "0.00000021"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/hearth-evm-gas-price-lookup-1532cae5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 138-197-15-135.sslip.io](https://www.zero.xyz/host/138-197-15-135.sslip.io/llms.txt)