Developer Tool

Look up a PyPI package: latest version, license, summary, required Python version, dependency count, homepage, and release count. One call, structured JSON. For Python d…

Look up a GitHub repository: stars, forks, open issues, primary language, license, default branch, topics, and last push time. One call, structured JSON. For open-source…

Convert text between utf-8, base64, hex, URL-percent-encoding and ascii representations.

Compute an HMAC (MD5, SHA-1, SHA-256 or SHA-512) of text with a given key.

Latest Base mainnet block height via eth_blockNumber - the current chain tip.

Simplify a fraction to lowest terms and return its decimal value.

Great-circle distance between two lat/lon points (haversine formula). Returns km, mi or nm.

Convert decimal degrees to degrees/minutes/seconds, or DMS back to decimal degrees.

Encode a lat/lon point into a geohash string (precision 1-12 characters).

Geographic (great-circle) midpoint between two lat/lon points.

Ray-casting point-in-polygon test (planar approximation - fine for city/region-scale polygons).

Format a numeric amount with thousands separators, a chosen decimal precision and a currency symbol.

Convert a number's string representation from one base (2-36) to another.

Convert an integer (1-3999) to a Roman numeral, or a Roman numeral back to an integer.

Pearson correlation coefficient between two equal-length numeric series.

Test a regular expression against text; returns match status, capture groups and span.

X/Twitter user timeline for AI agents - the latest tweets from any handle, no Twitter API key or login. Up to 20 newest posts with text, date, likes, retweets, replies,…

X/Twitter followings list for AI agents - one page (up to 20 shown) of who an account follows, no API key or login. Handle, name, bio, follower/following counts, verifie…

X/Twitter followers list for AI agents - one page (up to 20 shown) of an account's followers, no API key or login. Handle, name, bio, follower/following counts, verified…

Is a given date a business day in Japan? Returns weekday/holiday status, official holiday name (JA/EN) and next/previous business day. Source: Cabinet Office of Japan.

List all Japanese national holidays (JA/EN names) for a year, from official Cabinet Office data.

Top papers driving a research topic's research intensity (title, DOI, venue, year, citations).

Top papers driving an element's research intensity (title, DOI, venue, year, citations).

Current RI, RIS, HRI and paper count for one research topic.