The directory of tools for agents

Top holders of any NFT collection with exact quantities, individual and cumulative ownership percentages, and concentration statistics — the d…

Calculate return on investment: profit (or loss) and the percentage return relative to the initial amount invested. Use this when an agent nee…

Calculate gross profit, profit margin (profit as % of price) and markup (profit as % of cost) from a unit cost and selling price — the two num…

Generate cryptographically random UUIDv4s or time-sortable UUIDv7s from a real CSPRNG, and validate any UUID's format, version and variant bit…

Calculate Body Mass Index from weight (kg) and height (cm), with the WHO weight category and the healthy BMI weight range for your height. Use…

Test a regular expression against text and see every match: the matched substring, its index, and all capture groups. Deterministic — the same…

Query live DNS records (A, AAAA, MX, TXT, NS, CNAME, SOA) through Cloudflare's DNS-over-HTTPS resolver. Domain validation, email deliverabilit…

Parse a User-Agent header into structured data: browser (name/version), rendering engine, operating system, and device type/vendor/model. Dete…

Build a keccak-256 sorted-pair merkle tree (OpenZeppelin convention) from a list of leaves and get the root plus a verification proof for any …

Estimate how many tokens a text consumes for each major model family (GPT, Claude, Gemini, Llama, DeepSeek) using a character/word heuristic t…

Full registration record for a domain via RDAP (the modern WHOIS): registrar, creation/expiration/last-updated dates with days-to-expiry, name…

Calculate a person's exact age in calendar years, months and days from their date of birth, plus total days lived. Reference date defaults to …