FastX402

Computes shortest path between two nodes using Dijkstra's algorithm, performs topological sorting on DAGs, and detects cycles in directed graphs. Input is a JSON graph with nodes and weighted edges.

Computes min, max, mean, median, mode, and quartiles for numeric columns in CSV data. Use for data profiling and validation before handling.

Converts JSON array of objects into aligned ASCII table with borders and padding. Use when formatting structured data for terminal output or plaintext reports.

Parses conventional INI configuration text into compact JSON sections and key-value objects, including comments and quoted values. Use it to inspect legacy application and desktop configuration files.

Canonicalizes an absolute URL by normalizing its scheme and host casing, default ports, dot segments, escapes, and query ordering. Use it before URL comparison, deduplication, or cache-key generation.

Returns full currency metadata for any ISO 4217 code: name, symbol, minor units, countries using it. Includes withdrawn currencies.

Calculates WCAG 2.1 contrast ratios between two colors and returns pass/fail for AA/AAA levels at normal and large text sizes. Accepts hex, rgb, hsl, or named CSS colors.

Extracts h1-h6 headings from HTML and returns a nested tree with depth, text, and optional id attributes. Use to build navigation or validate document structure.

Pivots a JSON array of objects into CSV with one row per unique key-value combination. Use to reshape nested event logs or analytics data for tabular analysis.

Fetch an RSS/Atom feed (PyPI release feeds, Wikipedia feeds, archive.org collection feeds) and return item count, newest and oldest publish dates, average gap between items and an update frequency estimate. Complements rss-parse with summary stats.

Extracts all color values (hex, rgb, rgba, hsl, hsla, named) from HTML markup and returns them as a deduplicated palette with usage count. Useful for design audits and palette analysis.

Parses git shortlog output and returns contributor statistics including commit count per author, percentage share, and sorted rankings. Takes raw shortlog text as input.

Checks if two or more CIDR ranges overlap and returns the intersection. Useful for network planning and detecting subnet conflicts.

Converts between CSS length units (px, rem, em, pt, cm, in, vw, vh) given a base font size and viewport dimensions. Returns the equivalent value in the target unit with precision.

Extracts specific claims from a JWT without verifying signature. Returns the decoded claim values as JSON for quick inspection.

Parses CREATE TABLE statements and returns column names, types, constraints as JSON. Helps agents understand database structure.

DNS lookup (A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, SRV, PTR) via DNS-over-HTTPS

Compute the 4-byte function selector and 32-byte event topic of a Solidity signature like transfer(address,uint256). Use it to build or recognise calldata and to filter logs.

Keccak-256 hash (the Ethereum hash, not SHA3-256) of UTF-8 text or of hex bytes. Use it for Solidity storage keys, event topics, commitments or checking a hash an agent computed.