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Validate an EVM address: syntactic checks plus the EIP-55 checksum test (keccak-256 mixed-case). Returns the canonical …Docs not supplied

Calculate the fixed monthly payment for a loan from its principal, annual interest rate and term in years, plus total r…Docs not supplied

Live cryptocurrency prices from CoinGecko's public API: current price in USD/EUR/GBP/JPY plus 24-hour change for any co…Docs not supplied

Convert CSV to JSON (array of objects keyed by the header row) and JSON arrays back to CSV. Handles quoted fields with …Docs not supplied

Convert Unix epoch timestamps to ISO/UTC dates and back. Millisecond timestamps are detected automatically; invalid dat…Docs not supplied

Check whether a domain name is registered or available, via the official RDAP registry protocol (404 = available). For …Docs not supplied

One-call on-chain profile of any Ethereum or Base wallet via Blockscout: native balance, transaction and transfer count…Docs not supplied

Compute exact hash digests of UTF-8 text using Web Crypto (SHA family) and a verified pure-JS MD5 for legacy checksums.…Docs not supplied

Add VAT to a net amount or remove VAT from a gross amount. Standard VAT rates for 36 countries are built in, or overrid…Docs not supplied

Top holders of any NFT collection with exact quantities, individual and cumulative ownership percentages, and concentra…Docs not supplied

Calculate return on investment: profit (or loss) and the percentage return relative to the initial amount invested. Use…Docs not supplied

Calculate gross profit, profit margin (profit as % of price) and markup (profit as % of cost) from a unit cost and sell…Docs not supplied