7,300 resources accept payment on this network. eip155:137
Read the codes in an image URL: QR, Data Matrix, Aztec, PDF417, EAN-13, UPC, Code 128, Code 39... with format, content and position; flags URLs, crypto payment URIs (bit…
Generate a QR code as SVG or PNG (base64 and data URI) for any text, URL, payment link, Wi-Fi or vCard, with error-correction level, scale and colors.
Convert Arabic numbers to Roman numerals (1-3999) and Roman to Arabic, validating the canonical form (MCMXCIV) and suggesting the correct one.
Next passes of a satellite over a location (ISS by default, any NORAD id): rise, culmination and set times in UTC, max elevation, direction and whether it will be sunlit…
Read any RSS 2.0, RSS 1.0 or Atom feed (or find the feed a web page declares) and get clean JSON: title, link, date (ISO), author, plain-text summary and categories of e…
Search scholarly literature across all fields in OpenAlex (250M+ works): title, authors, institutions, year, journal, citation count, DOI and open-access link; by releva…
Savings or investment plan with monthly contributions and compound interest: final value, total contributed, interest earned, value in today's money after inflation, yea…
Official profile of a US listed company from the SEC: name, CIK, industry (SIC), state of incorporation, fiscal year end, address, phone, tickers and exchanges, former n…
Sort Semantic Versioning 2.0 versions (pre-releases included), give highest and lowest, the bump type between two, and which satisfy an npm-style range (^1.2.0, ~1.2, >=…
Verify a Sign-In with Ethereum (EIP-4361) login: parses domain, address, chain, nonce and dates, checks the signature and expiry, and optionally the expected domain and…
Resolve a Solana Name Service .sol domain to its owner wallet, read directly on-chain (NFT-tokenized domains resolve to the NFT holder).
Solana account inspector: whether it exists, type (wallet, token account, mint, program, program data), SOL balance, owner program and data size.
Primary (favourite) .sol domain of a Solana wallet, read on-chain and checked that the wallet still owns it.
Solana network status: current epoch and progress with estimated end time, slot and block height, recent TPS (total and non-vote), slot time, inflation rate, total and c…
Minimum SOL for a Solana account of a given size to be rent-exempt (165 bytes = token account, 82 = mint, 0 = wallet), with common reference sizes.
Current finalized Solana slot and block height, latest block time and a recent blockhash with its last valid height, ready to build transactions.
Search Solana tokens by name, symbol or mint with Jupiter: every match with verification, organic score, price, market cap, liquidity, holders and risk flags, to tell th…
Total supply of a Solana token with decimals, mint authority, freeze authority and token program.
Solana transaction status by signature: confirmed / failed / processing, slot, time, fee in SOL, signers, programs invoked and token balance changes.
Turn a Spanish address, street, town or place into coordinates with the official CartoCiudad geocoder (IGN): normalized address, municipality and INE code, province, reg…
Spanish business-day calculator: count business days between dates or add N business days, using Spain's national public holidays.
Find a Spanish municipality or town by name: INE code, province, region and coordinates, with alternatives when several match. Official CartoCiudad (IGN) data.
Daily CO2 emissions of electricity generation in Spain (tonnes) by technology (combined cycle, cogeneration, coal...) and emission factor (tCO2/MWh) over the last days.…
TLS certificate of a domain: issuer, validity dates, days until expiry, names covered (SAN), whether it matches the domain and is trusted, TLS version and cipher. For up…
