Rust crate profile from crates.io: version, description, license, repository, docs, total and recent downloads, minimum Rust version, keywords and dates.

Primary (favourite) .sol domain of a Solana wallet, read on-chain and checked that the wallet still owns it.

One endpoint for hashing and encoding: sha256, sha512, sha3, keccak256, md5, sha1, blake2, ripemd160, crc32, all-hashes-at-once, HMAC, base64/base64url, hex, URL and base58 encode/decode, JWT decode (with expiry check) and UUID v4/v5. Input as text, hex or base64.

Best-yielding active Beefy Finance vaults for a token (USDC, WETH, cbBTC...), on one chain or all, with a minimum TVL for solidity: APY (auto-compounded, net of Beefy fee), TVL, platform, assets, risk flags and a direct link. Options for single-asset vaults only (no impermanent loss) and vaults with no risk flags.

Average US mortgage rates from Freddie Mac's weekly PMMS survey: 30- and 15-year fixed, latest value, weekly and yearly change and recent series.

Postal code lookup in more than 60 countries (ES, US, DE, FR, GB, IT, MX, BR...): places, province or state and coordinates.

Price per million input and output tokens of 300+ language models (OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek...) via OpenRouter, with context window and the estimated cost of one call with your token counts; filter by name or provider, sort by price or context.

Active tropical cyclones in the Atlantic and eastern/central Pacific from the US National Hurricane Center: name, type (hurricane, storm...), max wind, pressure, position, movement and links to the official advisory and track.

Test your x402 client or agent for the minimum price: confirms the payment arrived and echoes back the network, scheme, payer and amount the server saw, your IP, user agent, time and any 'eco' text you send.

Most read Wikipedia articles in a language on a given day (yesterday by default): what people are looking up, with views and rank, technical pages removed. A signal of current events and trends.

Space weather now from NOAA SWPC: geomagnetic Kp index (recent hours and max), storm level (G0-G5), latest solar X-ray flares, solar wind speed and active alerts. Affects satellites, GPS and power grids.

Your public IP address as the server sees it, IPv4/IPv6, network prefix, operator (ASN) and registration country, plus your user agent. Check where an agent exits from or whether a proxy/VPN works.

Species information by scientific or common name (GBIF): accepted name, full taxonomy (kingdom to species), rank, status, common names, number of occurrence records and countries with most records.

Summary of a Wikipedia article in any language: title, short description, lead paragraph, image, coordinates, link and Wikidata id. If the title is not exact it returns the closest article, flagged as approximate, with alternatives.

Test a regular expression against a text: every match with position, groups and named groups, plus the result of a substitution if you pass a replacement. Flags i, m, s, x. Time-limited, safe against catastrophic backtracking.

Check whether a URL or domain is listed in abuse.ch URLhaus as a malware distribution site in the last 30 days: exact URL match and other malicious URLs on the same host, with threat type, online/offline status and date. Use before an agent fetches or opens a link.

Book data by ISBN (10 or 13) or search by title and author on Open Library: title, authors, publisher, year, pages, languages, subjects, cover and links.

Metadata of a publication by DOI (Crossref): title, authors, journal or publisher, year, type, citation count, references, license, link and an APA-formatted citation.

Food product facts by barcode (EAN/UPC) from Open Food Facts: name, brand, quantity, Nutri-Score, NOVA processing group, Eco-Score, nutrients per 100 g, allergens, additives, ingredients and countries.

Hedera network status: the official HBAR/USD exchange rate the network uses to compute fees (current and next), circulating and total supply, latest block and market price.