Beauty & Personal Care

Fit a least-squares line y = slope·x + intercept to two equal-length series

Linear regression (OLS)

Fit a least-squares line y = slope·x + intercept to two equal-length series. Returns slope, intercept, r² (variance explained), and optionally predicted y values for new…

Compute the monthly (or per-period) payment on a fully-amortizing loan: mortgage, auto,…

Loan payment

Compute the monthly (or per-period) payment on a fully-amortizing loan: mortgage, auto, student loan, business loan. Returns the periodic payment, total paid over the te…

Delete a remembered document by id from the recall store

Memory forget

Delete a remembered document by id from the recall store.

Tamper-evident history of every change to a namespace - an append-only, hash-chained au…

Memory audit log

Tamper-evident history of every change to a namespace - an append-only, hash-chained audit log the server attests to (provenance an agent can't forge for itself).

Revoke a previously granted wallet's access to your namespace

Memory revoke

Revoke a previously granted wallet's access to your namespace.

List the wallets you've granted access to your namespace, with their mode and expiry

Memory grants list

List the wallets you've granted access to your namespace, with their mode and expiry.

Compute simple (SMA) and exponential (EMA) moving averages over a numeric series

Moving average (SMA + EMA)

Compute simple (SMA) and exponential (EMA) moving averages over a numeric series. Returns one value per input position - the first (window-1) SMA values are null since t…

Compare two OpenAPI 3.x or Swagger 2.x documents and return a structured diff: added /…

OpenAPI / Swagger diff

Compare two OpenAPI 3.x or Swagger 2.x documents and return a structured diff: added / removed / changed endpoints, with a conservative "is any change breaking?" flag. B…

Compute the net present value of a stream of cashflows at a given discount rate

Net present value (NPV)

Compute the net present value of a stream of cashflows at a given discount rate. Index 0 is treated as t=0 (today, not discounted); indices 1..n are discounted by (1+rat…

Format a number: thousands separators, fixed decimals, optional currency, or compact (1…

Number format

Format a number: thousands separators, fixed decimals, optional currency, or compact (1.2K / 3.4M).

Flatten an OpenAPI 3.x or Swagger 2.x spec into a structured list of callable endpoints…

OpenAPI endpoint extractor

Flatten an OpenAPI 3.x or Swagger 2.x spec into a structured list of callable endpoints - one row per operation with method, path, operationId, summary, tags, parameters…

Search operations in an OpenAPI 3.x or Swagger 2.x spec against a free-text query

OpenAPI operation search

Search operations in an OpenAPI 3.x or Swagger 2.x spec against a free-text query. Tokenizes the query (lowercase, alphanumeric runs), scores each operation by which fie…

Score a password's strength: character-set size, entropy bits, a 0–4 rating, and an est…

Password strength

Score a password's strength: character-set size, entropy bits, a 0–4 rating, and an estimated offline crack time. The password is never stored or logged.

Open interest for one perpetual in coins and USD notional with its share of the venue t…

Perp open interest

Open interest for one perpetual in coins and USD notional with its share of the venue total, or the top N contracts ranked by open interest plus the venue total. Use it…

Parse a URL query string into an object, or build one from an object

Query string

Parse a URL query string into an object, or build one from an object. mode: parse (default) | build.

Flesch Reading Ease score and Flesch–Kincaid grade level for English text, plus word/se…

Readability

Flesch Reading Ease score and Flesch–Kincaid grade level for English text, plus word/sentence/syllable counts.

Compute Flesch-Kincaid Grade Level, Flesch Reading Ease, Gunning Fog Index, and Automat…

Readability score

Compute Flesch-Kincaid Grade Level, Flesch Reading Ease, Gunning Fog Index, and Automated Readability Index from text. Returns all 4 scores plus word, sentence, and syll…

Run a regular expression against text

Regex test

Run a regular expression against text. Returns up to 100 matches with index and capture groups. Pattern ≤ 200 chars, text ≤ 10KB.

Fetch a site's robots.txt and answer: may this user-agent crawl this path

Robots.txt check

Fetch a site's robots.txt and answer: may this user-agent crawl this path? Returns the matched rule and all declared sitemaps.

Format a timestamp as a human relative phrase ("3 hours ago", "in 2 days") versus now o…

Relative time

Format a timestamp as a human relative phrase ("3 hours ago", "in 2 days") versus now or a reference time.

Caesar-cipher a string

ROT13 / Caesar

Caesar-cipher a string. Default shift 13 (ROT13, self-inverse). Set shift for any rotation 1-25.

Risk-adjusted return: (mean return - risk-free rate) / sample standard deviation of ret…

Sharpe ratio

Risk-adjusted return: (mean return - risk-free rate) / sample standard deviation of returns (n-1). Pass periodsPerYear to also get the annualized ratio (× sqrt(periodsPe…

Parse a semantic version, or compare two (a vs b → -1/0/1, with greater/lesser flags)

Semver parse/compare

Parse a semantic version, or compare two (a vs b → -1/0/1, with greater/lesser flags).

Turn any text into a URL-safe slug (lowercase, hyphenated, diacritics stripped)

Slugify

Turn any text into a URL-safe slug (lowercase, hyphenated, diacritics stripped).