# SiteCheck Gas Price Lookup

> SiteCheck Gas Price Lookup is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-14).

Returns current EVM and Solana gas prices including base fee, priority fee tiers, and USD cost estimates for common transaction types on a specified blockchain network

## Facts

- Endpoint: GET https://api.sitecheck-api.workers.dev/api/gas?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-gas-price-lookup-27435a08
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Py4xPzeTzUuhC1wdfmY8S

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 sitecheck-gas-price-lookup-27435a08
```

Example prompt: What are the current gas prices on Base right now — give me the fast and normal priority fees in Gwei and tell me how much a simple ETH transfer would cost in USD?

## When to prefer this

Use this endpoint when you need real-time gas fee estimates for EVM-compatible chains (Base, Ethereum, Arbitrum, Optimism, Polygon) or Solana before executing a transaction, estimating user costs, or optimizing transaction timing. It provides structured fee tiers and USD cost estimates in a single call without requiring your own RPC node or price feed integration.

## Known failure modes

- Invalid chain name returns an error or defaults to Base
- Network RPC unavailability may cause stale or missing data
- Unsupported chain identifier returns an error response
- Price feed latency may cause slight discrepancy between gas cost in USD and actual execution cost

## How this service works

Pay-per-call tools for AI agents: image generation, speech-to-text, text-to-speech, embeddings, LLM chat, website audits and contact enrichment, web page to Markdown reader, PDF to text, sitemap URLs, tech stack detection, translation, exchange rates, e-mail pre-check, domain RDAP/DNS lookup, Solana token checks, trending tokens and wallet holdings, plus business and compliance data (EU VAT/VIES, IBAN, LEI/GLEIF, US recalls, OSHA/EPA violations, UK insolvency notices). Also: SEO metadata, link checking, redirect chains, security headers, mail DNS (SPF, DMARC, DKIM), QR codes, language detection, photo EXIF, identifier validation, image OCR, SEC filings, SEC financials, Congress bills, macro rates, UK company data, GitHub repo stats, Hacker News, Wikipedia, gas prices, Solana swap quotes, ERC-20 token checks, ENS names, EVM wallet balances, EVM balances, transactions and contract calls, Solana transactions and accounts, crypto prices, candles and order books, DeFi TVL, yields and stablecoins, SEC insider trades, weather, geocoding and holidays, IP owners and postcodes, npm, PyPI and crates package data and vulnerabilities, GitHub profiles, arXiv papers and DOIs, structured extraction, summaries, sentiment and reranking, HTML tables and RSS feeds, Bitcoin fees, addresses and transactions, Bitcoin address balances, Bitcoin transaction status, EVM calldata decoding, verified EVM contracts, Hyperliquid perpetual markets, Hyperliquid account positions, Polymarket odds, crypto fear and greed, DeFi fees, DEX volume, company registries of four countries, ISIN, CUSIP and ticker lookup, SEC full-text search, SEC 8-K events, FDA drug labels, FDA adverse event counts, clinical trials, PubMed articles, US federal grants, EU public tenders, NPI provider lookup, US address geocoding, USGS earthquakes, NWS weather alerts, sunrise and moon times, time zone conversion, distance and bearing, GDACS disaster alerts, llms.txt checks, AI crawler access, tracker and cookie audits, certificate transparency, site logos and icons, GitHub releases, GitHub issues, Stack Overflow answers, read-only Wikidata queries, text moderation, image descriptions, text classification, named entity extraction, PII redaction, phone number checks, cron explanations, JSON Schema validation. Plus prediction-market search, briefs, quotes and unsigned buy transactions, powered by Panta. Payment: x402, USDC on Base, Solana or Arc. No signup, no API key.

## Output

Returns a JSON object with the current block number and timestamp, chain name, base fee in Gwei, priority fee tiers (fast, normal, slow) in Gwei, estimated USD and native token cost for a standard ETH transfer (21,000 gas units) and an ERC-20 transfer (65,000 gas units), native token symbol, native token price in USD, cost basis methodology, and a data source description.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "chain": {
       "type": "string",
       "description": "base (default), ethereum, arbitrum, optimism, polygon, solana or all"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "block": {
   "time": "2026-10-13T18:51:19.000Z",
   "number": 52564066
  },
  "chain": "base",
  "source": "base JSON-RPC (eth_feeHistory over the last 20 blocks, median of each reward percentile), Coinbase spot price",
  "transfer": {
   "usd": 0.000316,
   "native": 1.3e-7,
   "gasUnits": 21000
  },
  "checkedAt": "2026-10-13T18:51:20.121Z",
  "costBasis": "base fee + normal priority fee",
  "disclaimer": "Information only, not financial advice.",
  "baseFeeGwei": 0.005,
  "nativeSymbol": "ETH",
  "erc20Transfer": {
   "usd": 0.000977,
   "native": 3.9e-7,
   "gasUnits": 65000
  },
  "nativePriceUsd": 2505.595,
  "priorityFeeGwei": {
   "fast": 0.011537,
   "slow": 0.001,
   "normal": 0.001
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-gas-price-lookup-27435a08/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.sitecheck-api.workers.dev](https://www.zero.xyz/host/api.sitecheck-api.workers.dev/llms.txt)