Other

Rebuild a nested object from a single-level object whose keys are delimited paths (default delimiter `.`) — the inverse of flatten. Requires a flat object.

Flatten a nested object/array into a single-level object whose keys are the delimited paths to each leaf (default delimiter `.`). Requires an object or array.

Classify a User-Agent by device form factor and return convenience booleans (isBot, isMobile, isTablet, isDesktop, isTouchCapable) for routing decisions.

Draw a random sample from a provided array — without replacement by default (a fair shuffle), or with replacement when unique is false. count defaults to 1.

Estimate password strength: score, guesses, crack-time and feedback. Never stored.

Choose the singular or plural form for a given count, e.g. (apple, 3) → "apples", (apple, 1) → "apple". By default the count is prepended ("3 apples"); set includeCount=false to omit it.

Sanitize untrusted HTML to a safe allowlist. Keeps common formatting and links but removes dangerous scripting tags, inline event handlers and unsafe URL schemes. Ideal for rendering user-supplied HTML.

Add, subtract, multiply or divide two fractions and return the exact, fully-reduced result. All computation is done in BigInt so there is no floating-point error. Dividing by a zero fraction is a clean 400.

Render a barcode (Code128, Code39, EAN-13/8, UPC-A/E, ITF-14, DataMatrix, PDF417) as SVG or PNG data URL.

Euler's totient φ(n) — the count of integers in [1, n] coprime to n — for a positive integer ≤ 10^15 (it is computed from the prime factorization).

Compute (base ^ exponent) mod modulus efficiently for arbitrary-precision integers. The modulus must be positive.

Miller-Rabin primality test (with witnesses that are exact for all 64-bit integers) on an arbitrary-precision integer. Returns { prime }.

Invert a square matrix via Gauss-Jordan elimination. A non-square, ragged or empty matrix is a clean 400. A singular (non-invertible) matrix is NOT an error — it returns a successful { invertible:false, inverse:null }.

Area (Heron's formula), perimeter and interior angles of a triangle from its three side lengths. Sides that violate the triangle inequality are rejected as a clean 400.

Area, perimeter and diagonal of a rectangle from its width and height.

Area (shoelace formula), perimeter and centroid of a simple polygon given its vertices in order. Vertices are treated as a closed ring (last connects to first).

Poisson distribution with rate `lambda` (> 0, ≤ 1e9). `function` selects the mass (pmf), cumulative distribution (cdf) or quantile / inverse-CDF.

Number of ordered arrangements of r items from n, nPr = n!/(n-r)!. Requires r ≤ n and r ≤ 10000.

Multinomial coefficient (k1+k2+…)! / (k1! k2! …) — the number of ways to partition n = Σki items into labelled groups of the given sizes. The sum must be ≤ 20000.

Exact factorial n! for 0 ≤ n ≤ 20000, returned as a decimal string with its digit count.

Compute the Moon's phase name, age in days since the last new moon and illuminated fraction (0..1) for a UTC date/time. Uses the mean synodic month (29.53 days).

x402engine — Generate a 5-second 768P landscape video with native audio using MiniMax H3

+2 more from x402engine.app

sfdsa

+1 more from agent-proxy.alchemy.com

Returns EPA Sole Source Aquifer designation containment and Federal Register citations for an address, for agents. Returns the same records as locus_sole_source_aquifer. Use this when your client can only call paid x402 routes. Use locus_sole_source_aquifer instead when you can call Locus free tools (REST tools/call or MCP).

+34 more from api.locus.report

Generate an image from a text prompt

+3 more from Driftflight

Produce value propositions mapping supplied capabilities to business outcomes and supporting evidence. Uses buyer-supplied information only; no external research or outbound actions. Returns a draft for human review.

+63 more from tradepilotusa.com

Signed receipt for a supplied SHA-256 digest

+8 more from fabair-agents.com

SENTINEL pre-execution safety verdict

create_text — $0.01 USDC

Deterministic eligibility and transfer-policy decision