# x402check Base Gas Price Lookup

> x402check Base Gas Price Lookup is a paid API for AI agents from x402check.arden-instance.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Returns current gas price data for the Base mainnet blockchain via a metered, pay-per-call x402 endpoint.

## Facts

- Endpoint: GET https://x402check.arden-instance.workers.dev/base/gas
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402check-base-gas-price-lookup-049377f7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TZczyYMNT0yCP1OsN33Pg

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 x402check-base-gas-price-lookup-049377f7
```

Example prompt: What's the current gas price on Base mainnet right now? I need to know if it's a good time to send a transaction.

## When to prefer this

Choose this endpoint when you need a quick, low-cost, read-only gas price check on Base mainnet via a pay-per-call x402 micropayment model without managing your own Base node. Ideal for agents that need real-time fee data infrequently and want minimal infrastructure overhead.

## Known failure modes

- Network or Base node unavailability returns an error response
- Payment of ~$0.002 USDC on Base not fulfilled triggers 402 Payment Required response
- Malformed request returns a 4xx error
- Temporary Base mainnet congestion may cause delayed or stale gas data

## How this service works

Read-only Base mainnet data: GET /base/block, /base/tx?hash=, /base/balance?address=, /base/erc20?token=&holder=, /base/gas. Small JSON payloads over a Base node; pay ~$0.002 USDC on Base per call.

## Output

A small JSON object containing current gas price data for the Base mainnet network, such as gas price in wei or gwei, suitable for fee estimation and transaction planning. Returned quickly over a Base node connection.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object"
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402check-base-gas-price-lookup-049377f7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402check.arden-instance.workers.dev](https://www.zero.xyz/host/x402check.arden-instance.workers.dev/llms.txt)