SiteCheck

Domain lookup over RDAP (the successor of WHOIS) and DNS: registered or available, registrar, creation, update and expiry dates, days until expiry, age, status codes, DNSSEC, name servers, plus whether it resolves (IPv4/IPv6) and its mail servers. Any TLD with an RDAP service; others are inferred from DNS.

Search Panta prediction markets (USDC on Solana) by keywords, phase or category. Compact rows: question, YES/NO implied probability from live prices, volume, close and resolution times, resolution source. Powered by Panta. Information only, not financial advice.

LLM chat completion with Llama 3.3 70B (fast): send messages or a prompt, up to 2048 output tokens.

Website technology detection: CMS, e-commerce platform, analytics, tag managers, CDN, hosting, chat, payments, A/B testing, consent tools and the e-mail provider, each with version, confidence 0-100 and evidence, from 231 own fingerprints over the home page, headers, cookies and the domain's MX/TXT records. For lead filtering and competitor research.

On-chain facts about an ERC-20 contract on Base (default), Ethereum, Arbitrum, Optimism or Polygon, read over RPC: name, symbol, decimals, total supply, code size, whether it is a proxy (EIP-1967, EIP-1822 or the pre-1967 OpenZeppelin slots) with its implementation and admin, owner() and whether ownership is renounced, risky functions found in the bytecode, and plain warning flags. No paid security service is called.

A public GitHub repository: stars, forks, watchers, open issues and pull requests, license, default branch, created and pushed dates, topics, languages with shares, latest release, commits in the last four weeks and the top five contributors. Up to six GitHub requests per call. Commit statistics are null while GitHub computes them. Source: GitHub REST API.

A UK company from Companies House, by number (00445790) or name (best match plus up to four alternatives): status, incorporation date, registered office, SIC codes, accounts and confirmation-statement due dates with overdue flags, current officers (max 20), persons with significant control (max 10) and the last 10 filings with links. Crown copyright, Open Government Licence v3.0.

Gas prices on Base (default), Ethereum, Arbitrum, Optimism, Polygon or Solana, or chain=all for every chain at once: the base fee and slow, normal and fast priority fees, the latest block, and what a plain transfer and an ERC-20 transfer cost in native token and USD. EVM figures come from eth_feeHistory over the last 20 blocks; Solana from recent prioritization fees. Cached 15 seconds.

Items of an RSS, Atom or RDF feed, or of the feed a web page advertises: title, link, published date, author and a 300-character summary, newest first (max 50). since keeps items published on or after a date.

Every HTML table of a web page as JSON: caption, headers and rows, up to 10 tables with 200 rows each. Tables that a script draws are not included. robots.txt is respected; a page it disallows answers 403, not charged.

Orders up to 50 documents by relevance to a query with the BGE reranker and returns rank, index and score for each. Use it after a keyword or vector search to pick the best few. Scores compare documents within one call only.

A summary of a web page (url) or your own text (up to 12,000 characters) as short, medium or bullets, in the language you name, with key points. Llama 3.3 70B. A page is read as in /api/read, robots.txt respected.

Structured data from a web page (url) or your own text: give a schema of up to 20 field names with what each holds, and get a JSON object with exactly those fields, null where the text does not state one. Llama 3.3 70B. Text is capped at 12,000 characters; a model answer that is not JSON is retried once, then not charged.

arXiv papers matching search terms, optionally in one category (cs.AI, math.CO), newest first, max 25: id, title, authors, dates, a 500-character summary, categories and the PDF link. Attribution: Thank you to arXiv for use of its open access interoperability.

Known vulnerabilities of one package version in the OSV database: npm, PyPI, crates.io, Go or Maven. Each advisory has its id, CVE aliases, summary, severity, fixed versions and a link. The count is the full number; up to 20 are listed.

Who owns an IP address: network name, CIDR, owner, abuse contact (RDAP), ASN and holder (RIPEstat), and reverse DNS. Private, reserved and documentation addresses are refused with 400. Public registry data only.

Stablecoins tracked by DefiLlama: circulating supply, peg type and mechanism, price, and the chains each one runs on. With symbol, that coin; without it the 50 largest. Attribution: Data: DefiLlama. Information only, not financial advice.

DeFi yield pools from DefiLlama with at least $1M TVL, sorted by APY and filtered by chain, project or symbol (max 50). APY is DefiLlama's estimate, split into base and reward; reward APYs are often temporary. Attribution: Data: DefiLlama. Information only, not financial advice.

OHLCV candles for a Coinbase trading pair (BTC-USD) at 1m, 5m, 15m, 1h, 6h or 1d granularity, up to 300, newest first, from Coinbase Exchange public market data. Prices are that venue's trades only. Information only, not financial advice.

USD spot prices for up to 20 symbols (BTC, ETH, SOL...) from Coinbase, with the source of each price. A Solana mint address also works and is priced by Jupiter. Symbols without a price are listed in unavailable. Cached 15 seconds. Information only, not financial advice.

A Solana transaction by signature: status, time, fee in SOL and USD, signers, SOL balance changes per account, token balance changes (mint, owner, change) and the programs it invoked. Read-only; nothing is sent. A very new signature may be missing (404, not charged).

ERC-20 allowance an owner has granted a spender for one token: raw and human amount, with the token's symbol and decimals. unlimited is true when the allowance is at least 2^255, the usual approve-everything value. Read-only.

ERC-20 transfers into and out of an address in a window of recent blocks (default 2,000, max 10,000), from Transfer logs, newest first, max 100 rows with token symbols. token limits the search to one contract. A busy address can be truncated: narrow the window to see the rest.

Status, block, time, sender, recipient, value, gas used and fee (native and USD) of an EVM transaction, plus the ERC-20 Transfer events inside it (token, symbol, from, to, amount). A pending transaction returns status pending. Read over public RPC; a fallback node is used when the first refuses old receipts.

ERC-20 balance of an address for one token contract on a chain: token name, symbol, decimals, raw and human amount, and a USD value when Coinbase has a spot price for the symbol. Only the token you name is read; the native balance is in /api/evm/address.

Native balance, nonce and account type of an EVM address on Base (default), Ethereum, Arbitrum, Optimism or Polygon: a wallet, a contract, or an EIP-7702 delegated wallet with its delegate. On Ethereum also the ENS primary name, when it resolves back to the address. Read over public RPC.

PubMed articles matching words, optionally from a year: PMID, title, first five authors, journal, date, DOI and link. Two NCBI requests. Attribution: PubMed (NCBI). Information only, not medical advice.

Validates JSON data against a JSON Schema (draft 2020-12): valid true or false, and up to 50 errors with the instance path, the keyword and the message. Schema and data are each limited to 200 KB. Remote $ref targets are not fetched. No network call.

Explains a cron expression in plain English and lists its next runs in UTC and in a time zone. Five fields (minute hour day month weekday), or six with seconds first. Names (MON, JAN) and steps are supported. Computed in the Worker; no network call.

Checks and formats a phone number with libphonenumber: valid and possible flags, E.164, international and national formats, country, calling code and line type (mobile, fixed line, toll free and so on). Without a + sign, give the country. No network call.