Compares two semantic version strings and reports which is greater, lesser, or equal, using the standard semver comparison rules.
Solves a system of linear equations (Ax = b) using the ml-matrix library's LU decomposition (LuDecomposition), with a near-singularity guard beyond the library's exact-s…
Descriptive statistics summary (mean, median, variance, standard deviation, and 25th/75th/90th percentiles via linear interpolation, matching R and numpy's default "type…
Prime factorization of an integer via trial division, returning the full list of prime factors (with repetition).
URL validation API. Checks whether a string is a syntactically valid URL, catching malformed schemes, hosts, and encoding edge cases a naive check misses. Returns true o…
Postal code resolution for ~60 countries via Zippopotam.us (GeoNames data, CC BY 4.0). Forward: ?country=us&code=90210 -> place names, state, lat/lon. Reverse: ?country=…
Official Finnish company registry via PRH YTJ open data v3 (avoindata.prh.fi). Query: ?q=nokia for name search (best matches first, max 10) or ?q=0112038-9 for exact Bus…
Recent earthquakes — search newest-first USGS seismic events by rolling time window and minimum magnitude, with revision, freshness, and provenance.
Significant earthquakes — search USGS seismic events above an explicit significance-score threshold, with magnitude and provenance but no danger or probability claim.
Job search — find current openings by role, skill or company with location, salary, schedule, qualifications and direct application links.
Receive-only email inbox on a clean domain for 7 days — for account verifications without phone, captcha or personal address. No sending.
Exact symbolic computation (SymPy): simplify, differentiate, integrate, solve equations/systems, limits, series, Laplace/Fourier transforms, arbitrary-precision eval. Ex…
Physical chemistry (Cantera + CoolProp): chemical equilibrium, adiabatic flame temperature, ignition delay, reactor simulation, flame speed, and thermo/transport/fluid p…
Quantum circuit simulation (Qiskit Aer): statevector, density-matrix (noise), stabilizer, and MPS methods; shots, expectation values, and seeded determinism. Sync tier u…
Token/asset metadata — name, symbol, decimals, chain info
Reverse-resolve an Ethereum address to its ENS name
KYB identity verification for due diligence and compliance: confirm that a business registration number really matches the representative (CEO) name and opening date bef…
Scored intelligence on freshly-launched Base tokens: safety + momentum → composite score and an AVOID/WATCH/HOT decision per launch. One call returns a ranked list.
Before your agent onboards, pays, or contracts with a counterparty: screen the name against the U.S. Treasury OFAC sanctions lists (SDN + Consolidated non-SDN, synced ev…
EOA vs contract, ETH + USDC balance, transaction count and activity level — straight from Base RPC. Useful for counterparty and wallet checks.
🆕 b20-freeze-check answers one wallet; this enumerates the WHOLE list. Replays the Policy Registry's BlocklistUpdated/AllowlistUpdated events into the full membership o…
Recent history of a NEAR account, summed up: transactions signed and received, failures, NEAR sent and received, token flows in and out per token, the contracts it calls…
Syntax + live DNS (MX/A) + disposable, role and consumer-mailbox detection, as one GO / HOLD / STOP verdict with the reasons listed. Catches throwaway inboxes, support@-…
🆕 The feasibility check before you ask a user for money: which fiat-in and cash-out rails Coinbase actually runs in a country, the currencies and min/max limits for eac…
