# CoinOpSelect Gas Price API

> CoinOpSelect Gas Price API is a paid API for AI agents from coinop.publicvm.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-21).

Returns current gas prices in Gwei for Base, Arbitrum, and Ethereum networks via a pay-per-call x402 endpoint.

## Facts

- Endpoint: GET https://coinop.publicvm.com/api/v1/market/gas?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coinopselect-gas-price-api-7bdc6827
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zCmkS2a6emvpPAlHw_oev

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 coinopselect-gas-price-api-7bdc6827
```

Example prompt: What are the current gas prices on Base, Arbitrum, and Ethereum right now?

## When to prefer this

Prefer this endpoint when you need real-time gas price data across Base, Arbitrum, and Ethereum in a single call, and can pay per-call via USDC on Base using the x402 protocol. Ideal for AI agents and DeFi bots that need lightweight, pay-as-you-go gas price lookups without a subscription.

## Known failure modes

- Payment not received or invalid x402 payment header returns 402 Payment Required
- Network unavailable may return stale or missing data for specific chains
- Rate limiting or overload may result in 503 errors
- Malformed request may return 400 Bad Request

## How this service works

Paid on-chain token, wallet, contract and research data over x402 on Base.

## Output

A JSON object containing gas prices in Gwei for Base, Arbitrum, and Ethereum networks, along with the data source identifier and a timestamp of when the prices were generated.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "source": "stream-2-a2a/gas-price",
  "networks": {
   "base": {
    "gasPriceGwei": 0.01
   },
   "arbitrum": {
    "gasPriceGwei": 0.01
   },
   "ethereum": {
    "gasPriceGwei": 0.3
   }
  },
  "generatedAt": "2026-01-01T00:00:00.000Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coinopselect-gas-price-api-7bdc6827/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from coinop.publicvm.com](https://www.zero.xyz/host/coinop.publicvm.com/llms.txt)