Financial ratios for a US public company computed from its latest annual SEC XBRL filings: gross, operating and net margin, revenue, net income and EPS growth vs the prior year, current ratio, debt to equity, liabilities to equity, free cash flow and FCF margin, with every input value cited to its XBRL concept, period, form, filing date and accession number. Free sample: https://sec-filings.mick8511.workers.dev/sample

EVM wallet net worth on Ethereum, Base, Arbitrum, Optimism and Polygon: native coin plus about 40 major tokens (USDC, USDT, DAI, WETH, WBTC, cbBTC, stETH, LINK, ARB, OP and more), each balance priced with Chainlink oracle feeds, with per-chain and overall USD totals. Live on-chain reads, one Multicall3 per chain. Free sample: https://onchain-health.mick8511.workers.dev/sample

OFAC sanctions check for one crypto address on any chain (BTC, ETH and EVM chains, TRX, SOL, XMR, LTC, BCH, USDT, USDC and more): sanctioned yes/no, and for a hit the SDN entity name, type, sanctions programs, DOB, nationality and OFAC link, with the SDN list publication date and age. Screening aid, not legal advice. Free sample: https://sanctions-screen.mick8511.workers.dev/sample

Batch spot prices for up to 20 assets in one call — each with price, 24h change and volume, keyed by symbol. The cost-efficient way to price a basket or portfolio in a single request instead of N calls.

Resolve a Basename (name.base.eth) to its Base address, or an address to its primary Basename, checked both ways so a reverse name is only returned when it resolves back. Use it to turn a human name into a payout address or to label an address. Avoids hand-written ENS-style namehash and resolver calls. Query: ?name=jesse.base.eth or ?address=0x...

SEC company lookup: resolve a stock ticker, CIK number or company name to the SEC registrant profile with CIK, legal name, tickers, exchanges, SIC industry code and description, state of incorporation, business address, fiscal year end, filer category and former names, from SEC EDGAR. Free sample: https://sec-filings.mick8511.workers.dev/sample

Checks whether a signature was made by a claimed EVM address: EIP-191 personal_sign messages, EIP-712 typed data or a raw 32-byte digest, verified by ecrecover for wallets or ERC-1271 isValidSignature for smart-contract wallets (Safe, Coinbase Smart Wallet) on Ethereum, Base, Arbitrum, Optimism or Polygon. Returns validity, method, recovered signer and digest. Free sample: https://onchain-health.mick8511.workers.dev/sample

Polymarket order book: top-of-book bid/ask, spread and USD depth on both sides for any market

Chainlink oracle prices read on-chain: answer, decimals, round id, last update time, age and a staleness flag for up to 10 pairs per call (ETH, BTC, USDC, USDT, DAI, LINK, UNI, AAVE, stETH, USDe, ARB, OP, POL, AERO, cbETH vs USD) on Ethereum, Base, Arbitrum, Optimism or Polygon. Free sample: https://onchain-health.mick8511.workers.dev/sample

Stablecoin peg monitor: Chainlink oracle price, deviation from $1 in basis points, a depeg flag (over 1%) and on-chain total supply per chain for USDC, USDT, DAI and USDe across Ethereum, Base, Arbitrum, Optimism and Polygon. Live reads, one Multicall3 per chain. Free sample: https://onchain-health.mick8511.workers.dev/sample

Japanese company search: look up companies in the official JP corporate registry by trade name and/or location. Partial-name match on both the Japanese and registered English name, with width/abbreviation normalization, filterable by prefecture, city, and corporation kind. Returns up to 50 corporations with their 法人番号 and lifecycle status. Dynamic pricing: a base fee plus a small per-result fee.

Geocode + timezone + currency context for any location string.

Geolocate an IPv4/IPv6 address: country, region, city, postcode, lat/lng, timezone, ISP, org, ASN, and a datacenter heuristic.

Locate a printed pasuram reference in the pinned Project Madurai/Hart atlas. Resolves one supported number to its complete unit and exact edition-specific locator. No cross-edition renumbering, translation reproduction or single-verse occurrence claim.

Check declared publication views before release. Compare 2-8 article, registry and API views against canonical URL, content, release and source-set digests; flag stale, withdrawn or substituted views. No live fetch, release promotion or semantic content verification.

Convert a measurement without losing declared uncertainty: one decimal value and standard uncertainty across supported length, mass, time or temperature units using exact rational scale/offset arithmetic. No unit guessing, physical validation or expanded uncertainty.

Check a revision handoff before reusing evidence. Compare one initial or superseding transition with its declared predecessor; return lineage inconsistencies and an integrity receipt. Does not establish authenticity, semantic equivalence or inherited review approval.

Current CBR key rate (% p.a.) from the cbr.ru DailyInfo web service (KeyRateXML; the hd_base/KeyRate page as fallback): rate, as_of, effective_since, previous_rate, last_change_bp and every change in the last `months` (default 24) newest first, plus min/max in the window. Cached 3 h.

Find 5 ranked public-web product, price, specification, and review sources. Not a live inventory guarantee.

Historical macro events with actual vs estimate values (e.g. CPI came in above/below forecast). Use to study how markets reacted to surprises and to backtest event-driven strategies.