General Utilities x402 offerings

Total USD net worth of a wallet aggregated across Ethereum, Base, Arbitrum, Optimism and Polygon with per-chain breakdown, spam filtered - multi-chain portfolio valuation agents cannot compute themselves. wallet net worth, portfolio value, wallet balance usd, multi-chain holdings, address net worth, wallet valuation Accepts payment on Base or Solana — either network works.

Fetch and parse robots.txt for a domain. Returns parsed allow/disallow rules per user-agent, sitemap URLs, crawl-delay directives, and raw content. Built for AI agents planning ethical web crawling and SEO audit. Use ?domain=example.com. Accepts payment on Base or Solana — either network works.

extract keywords, keyword extraction, keyword extractor, find keywords, top keywords, SEO keywords, automatic keyword extraction, document keywords. Extract significant keywords from any English or multilingual text. Returns top N keywords ranked by frequency and importance with stopwords filtered. For AI agents doing SEO analysis, content tagging, document categorization, topic modeling. Accepts payment on Base or Solana — either network works.

Check the exact ERC20 allowance an owner granted a spender and flag unlimited approvals that let a contract drain funds - a pre-transaction safety check agents need that LLMs cannot perform. allowance risk, approval risk, unlimited approval, spender risk, revoke check, token approval safety Accepts payment on Base or Solana — either network works.

HTML entity encoder/decoder, XSS prevention, named entities, numeric entities, and amp; and lt; and gt;, character escape. Escape user input for safe HTML. Accepts payment on Base or Solana — either network works.

ERC20 token metadata by contract address and chain: name, symbol, decimals, logo, total supply and verified-contract flag, from an indexed source behind an API key. Data agents cannot self-derive. token metadata, erc20 info, token name symbol decimals, contract metadata, token logo Accepts payment on Base or Solana — either network works.

Live FIL to USD price (Filecoin / US Dollar). Zero-param: GET returns current price. Filecoin美元实时价格行情。ファイルコイン/米ドル 価格。Precio Filecoin dólar. 파일코인 달러 시세. fil usd, fil-usd, FIL price. Accepts payment on Base or Solana — either network works.

Live WTI Crude Oil price (commodity futures, USD). Zero-param: GET returns current price. WTI原油实时价格行情。WTI原油価格。Precio petroleo WTI. WTI 원유 시세. wti price, wti crude oil spot, commodity quote. Accepts payment on Base or Solana — either network works.

The real x402 seller leaderboard with known wash-trading whales filtered out - the genuine top providers by activity that public rankings hide behind inflated wash-traded numbers, from proprietary tracking data. x402 leaderboard, x402 top sellers, x402 ranking, real x402 providers, agent economy leaders, x402 rankings Accepts payment on Base or Solana — either network works.

Validate and compute the EIP-55 checksum of an Ethereum address - precise mixed-case checksum that catches typos, which LLMs cannot reliably produce. checksum address, eip55, address validation, ethereum checksum, validate address, address checksum Accepts payment on Base or Solana — either network works.

Classify Ethereum wallet by behavior pattern: exchange, MEV bot, whale, smart-money, fresh, contract, sybil, unknown. Returns primary_tag, confidence (0-1), signals (tx frequency, counterparty patterns, x402 payment history), metrics (nonce, eth_balance, is_contract). Combines onchain RPC analysis with Coinbase Bazaar payer behavior. Use for AI trading agent counterparty assessment, treasury monitoring, on-chain due diligence. Accepts payment on Base or Solana — either network works.

⚠️ BETA — IOC data under active verification 2026-05-25, do not rely on matches for production. Supply chain campaign detail by id. IOCs, compromised versions, remediation. For incident response. Accepts payment on Base or Solana — either network works.

Business days calculator, working days between dates, weekdays counter, exclude weekends, workday count, business day arithmetic. Count business days (Mon-Fri) between two dates, separating weekend days. No holiday data, just weekend exclusion. Accepts payment on Base or Solana — either network works.

Detect whether a contract is an upgradeable proxy and resolve its implementation address by reading EIP-1967/1822 storage slots on Ethereum or Base - on-chain state LLMs cannot access. proxy detect, proxy contract, implementation address, upgradeable proxy, eip1967, proxy resolver Accepts payment on Base or Solana — either network works.

Top holders of an ERC20 token with balances and percentage of supply, plus the concentration of the largest holders, by contract and chain, from an indexed source behind an API key. For risk and whale analysis. token holders, whale concentration, top holders, supply distribution, rug risk Accepts payment on Base or Solana — either network works.

Phone number validator: E.164 format check, international phone validation, country code parser, phone number format and mobile/line-type hints. Pass phone=+14155552671. For AI agents doing phone lookup, phone validation and number formatting. 电话号码校验。 Accepts payment on Base or Solana — either network works.

Detect image format from a URL using magic bytes (works even when extension or content-type lies). Returns format, content-type match flag, file size, dimensions. Use url param Built for AI agents validating untrusted image inputs. Accepts payment on Base or Solana — either network works.

Get dimensions and format for an image URL. Returns width, height, type (jpeg/png/gif/webp/bmp/tiff/heic/avif), aspect ratio, file size, content-type. Use url param Built for AI agents validating uploads, generating srcsets, planning layouts. Accepts payment on Base or Solana — either network works.

NFT collection overview by contract and chain: name, symbol, contract type, spam flag, total supply, current owner count and total transfers, from an indexed source behind an API key. For collection due diligence. nft collection, collection stats, nft supply, owner count, nft contract info Accepts payment on Base or Solana — either network works.

Verified contract ABI by address and chain, returned as parsed JSON plus function and event name lists, from a block explorer behind an API key. Lets an agent decode and interact with a contract. contract abi, get abi, decode contract, function signatures, smart contract interface Accepts payment on Base or Solana — either network works.

Duration calculator, time difference, elapsed time, days between dates, hours between times, age calculator, how long ago, countdown, time span. Compute the duration between two timestamps with human-readable breakdown (years, months, days, hours, minutes, seconds). Accepts payment on Base or Solana — either network works.

Convert DOT to USD at live price. Pass ?amount=1 for value in US Dollar. 波卡兑换美元换算。ポルカドットを米ドルに換算。Convertir Polkadot a dólar. 폴카닷를 달러로 환전. dot to usd, Polkadot convert. Accepts payment on Base or Solana — either network works.

URL status checker, HTTP status code, website uptime monitor, endpoint health probe, dead link detector, redirect chain tracker, response time measurement, TTFB, 404 detector, 500 error checker. Check any public URL for HTTP status, response time, content-type, content-length, redirect chain, server header. For AI agents, monitoring pipelines, security audits, and link validation. Accepts payment on Base or Solana — either network works.

Credit card validator, Luhn algorithm check, card number verification, card type detector, Visa Mastercard Amex Discover Diners JCB UnionPay brand identifier, PAN validation. Validate credit card number via Luhn algorithm and identify card brand. Returns validity, card type, masked number. No payment processing, validation only. Accepts payment on Base or Solana — either network works.