API marketplace

The crypto market's "fear gauge" and the premium option sellers earn, read live from Deribit's public DVOL index and Binance's candles — no key, nothing stored. DVOL is Deribit's 30-day forward implied-volatility index for BTC and ETH, the crypto equivalent of the VIX: the single number that says how much volatility the options market is pricing in. The index endpoint returns the latest DVOL, the session open/high/low/close, the 24-hour change and a plain-language regime label (low, normal, high, extreme). The vrp endpoint computes the variance risk premium — implied vol (DVOL) minus the realised volatility actually delivered over the last 30 days (annualised standard deviation of daily log returns from Binance candles): when implied sits well above realised, option sellers are being paid a premium and the rich/cheap signal flags it; when implied is below realised, options are cheap relative to what the market has been doing. The history endpoint returns the DVOL index time series. This is the implied-volatility-index / variance-risk-premium cut — distinct from the realised-volatility API (which has no implied leg), the equity VIX-family indices and the option-chain, skew and gamma APIs in the catalogue. Currency is BTC or ETH (the assets Deribit publishes DVOL for).

Uptime

100.0%

Latency

187ms

Subs

3,629

Where option-dealer hedging flows concentrate, and whether they damp or amplify price moves — computed live from Deribit's public option book, no key, nothing stored. Each open option carries gamma; when dealers are net long gamma they hedge against the move (buy dips, sell rips) and volatility is suppressed, and when they are net short gamma they hedge with the move and volatility is amplified. The gex endpoint aggregates Black-Scholes gamma across every listed expiry, weighted by open interest, into the net dealer gamma exposure (in dollars per 1% move), the call and put gamma split, the zero-gamma flip level — the spot price at which net GEX crosses zero, the boundary between the mean-reverting (positive-gamma) and trending (negative-gamma) regimes — where spot sits relative to it, and the strikes holding the most gamma (the pinning magnets and acceleration zones). The profile endpoint returns GEX by strike, across all expiries or one. The expiries endpoint returns net GEX per listed expiry. This is the dealer-gamma / GEX analytics cut for crypto — distinct from the max-pain / open-interest positioning view, the implied-vol skew surface, the raw option chain and the single-option Black-Scholes pricer in the catalogue. GEX uses the SpotGamma convention (dealers long calls / short puts, r=0) and Black-Scholes gamma from mark IV — a model estimate of positioning, documented as such, not exchange-reported dealer inventory. Currency is BTC, ETH, SOL or XRP.

Uptime

100.0%

Latency

154ms

Subs

3,136

The shape of the crypto implied-volatility surface, computed live from Deribit's public option book — no key, nothing stored. A single at-the-money number hides what the options market is really saying. The skew endpoint returns, for a currency (BTC, ETH, SOL, XRP) and expiry, the ATM implied vol, the implied vols of an out-of-the-money put and call at a chosen moneyness, the risk reversal (call IV minus put IV — positive means calls are bid and upside is favoured, negative means puts are bid and the market is paying up for downside protection) and the butterfly (the average of the wings minus ATM — how convex the smile is). The termstructure endpoint returns the ATM implied vol for every listed expiry, so you see whether near-dated vol sits above far-dated (backwardation, stress) or below (contango, the calm default). The smile endpoint returns the full implied-vol-by-strike curve for one expiry — the classic volatility smile. This is the volatility-surface analytics cut for crypto — distinct from the raw per-contract option chain, the max-pain / open-interest positioning view, the realised-volatility series and the US-equity put/call APIs in the catalogue. Currency is BTC, ETH, SOL or XRP; expiry is a Deribit code like 26JUN26 (omit for the nearest).

Uptime

100.0%

Latency

138ms

Subs

3,008

Who is actually hitting the market — buyers or sellers — read live from Binance's aggregated trade tape, no key, nothing stored. Every trade carries a flag for which side was the aggressor: a taker buy lifts the ask, a taker sell hits the bid. Summing those over a window gives order flow — the net buying or selling pressure that price action follows — and its running total is the Cumulative Volume Delta (CVD), the metric order-flow traders watch to spot absorption and divergence. The flow endpoint scans the recent aggregated trades for a pair (up to 5,000) and returns the taker-buy and taker-sell volume in base and quote, the delta (buy minus sell), the CVD over the window, the buy/sell ratio, the share of volume that was buying, a net-pressure label and the time span covered. The large endpoint surfaces the big prints — single aggressive trades above a notional threshold — and tags each as a taker buy or sell, so you see the whale orders moving the tape, with the buy- and sell-side large-trade totals. The symbols endpoint lists tradable pairs. This is the trade-flow / CVD microstructure analytics cut for crypto — distinct from the raw recent-trades feed, the order-book depth and the price, ticker and slippage APIs in the catalogue. Pairs are Binance symbols (BTCUSDT) or a coin=BTC&quote=USDT form.

Uptime

100.0%

Latency

555ms

Subs

3,159

Where the crypto options market is positioned, and the strike toward which an expiry's open interest exerts the most "pain" — computed live from Deribit's public option book, no key, nothing stored. Max pain is the strike at which the total value of all open options is lowest at expiry: the price at which the greatest dollar amount of option open interest expires worthless and option writers keep the most premium. Traders watch it because price often gravitates toward max pain into a large expiry. The maxpain endpoint takes a currency (BTC, ETH, SOL, XRP) and an expiry and returns the max-pain strike, the spot/underlying, how far spot sits from max pain, and the call and put open-interest totals with the put/call OI ratio. The oi endpoint returns the full open-interest-by-strike distribution for an expiry — which strikes hold the most open interest, the magnets and walls (support & resistance) traders watch. The expiries endpoint lists every listed expiry with its aggregate open interest, contract count and call/put split. This is the aggregate options-positioning / max-pain analytics cut for crypto — distinct from the raw per-contract option chain (greeks/IV), from US equity options and from the crypto-volatility APIs in the catalogue. Currency is BTC, ETH, SOL or XRP; expiry is a Deribit code like 26JUN26.

Uptime

100.0%

Latency

143ms

Subs

3,578

What a crypto trade actually costs once it eats into the order book — computed live from Binance's full depth feed (up to 5000 levels per side), no key, nothing stored. Top-of-book price is a fiction for anything but the smallest order: a real market order walks down the book, filling progressively worse levels, and the gap between the quoted price and the realised average fill is slippage. The estimate endpoint takes a pair, a side (buy or sell) and a size — in quote currency (notional, e.g. $250,000) or in base coin (quantity) — walks the live book level by level and returns the average fill price, the slippage versus the mid and versus top-of-book, the price impact (how far the last filled level sits from mid), the number of levels consumed and whether the book even holds enough liquidity to fill. The depth endpoint returns a liquidity profile: top bid/ask, mid, spread and the cumulative bid- and ask-side liquidity sitting within ±0.1%, ±0.25%, ±0.5%, ±1% and ±2% of mid, plus the book imbalance — a one-glance read on how deep and how lopsided a market is. The symbols endpoint lists tradable pairs. This is the execution-cost / market-impact analytics cut for crypto — distinct from the raw exchange order-book feed, from VWAP-on-candles, and from the price, ticker and quote APIs in the catalogue. Pairs are Binance symbols (BTCUSDT) or a coin=BTC&quote=USDT form.

Uptime

100.0%

Latency

388ms

Subs

3,297

How house prices are moving across the world's economies, read live from the Bank for International Settlements' Selected Residential Property Prices dataset. For roughly 60 countries the BIS publishes a quarterly residential property price index — both nominal and real (inflation-adjusted) — together with its year-on-year change. The latest endpoint returns every country's most recent reading at once — the nominal and real index plus the nominal and real year-on-year growth — sortable by nominal or real YoY so you instantly see which housing markets are heating up and which are cooling once you strip out inflation. The country endpoint returns a single country's latest reading; the history endpoint returns its quarterly index time series (nominal and real) so you can chart a market over time. Countries are given as ISO-2 codes (US, DE, GB, JP) or common names (xm is the euro area). The nominal index is the headline price level; the real index is deflated by consumer prices, so a negative real YoY means prices are falling after inflation even when the nominal index still rises. This is the real-estate / property-price macro data-cut — distinct from the FX-rate, central-bank, yield-curve, commodity and equity-index APIs in the catalogue. Live source, no key required upstream, nothing stored.

Uptime

100.0%

Latency

385ms

Subs

4,115

The tickers people are actually searching for right now, served from Yahoo Finance's public trending feed. This is an attention and retail-interest signal, not a price-mover list: the trending endpoint returns the most-searched symbols in a region (US, UK, Germany, France, India, Brazil and more), and enriches each one with its live price, day change and exchange — so you see what is grabbing attention and how it is moving. The ticker endpoint answers the question "is this symbol trending right now, and where does it rank". The regions endpoint lists the supported markets. This is the search-attention / sentiment data-cut for stocks — what retail is watching — distinct from the price-based market-movers, the live-quote and the intraday-candle APIs in the catalogue. Trending reflects search interest and shifts through the trading day. Live, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

193ms

Subs

3,440

What the US national debt is actually made of, served from the Treasury's Monthly Statement of the Public Debt. The headline debt-to-the-penny figure is one number; this is the breakdown — how the roughly $39 trillion splits across Treasury Bills, Notes, Bonds, TIPS and Floating-Rate Notes (the marketable, tradable debt) versus the non-marketable debt (the Government Account Series held by federal trust funds, Savings Bonds, and State and Local Government Series). The composition endpoint returns the latest full breakdown by security class, each with its share of the total and its split between debt held by the public and intragovernmental holdings. The marketable endpoint isolates the tradable securities (Bills/Notes/Bonds/TIPS/FRN) with each one's share of marketable debt — the issuance mix that rates traders and the Treasury's quarterly refunding watch. The history endpoint returns one security class's outstanding amount month by month. This is the debt-structure data-cut, distinct from the debt-to-the-penny total, the fiscal-deficit and the yield-curve APIs in the catalogue. Live, updated monthly, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

343ms

Subs

4,838

Who secures Solana and how decentralised it is, read straight from a public Solana RPC node. Solana is proof-of-stake: validators vote with the SOL delegated to them, and the distribution of that stake decides both rewards and security. The validators endpoint ranks validators by activated stake, with each one's stake in SOL, its share of total stake, its commission and whether it is delinquent (currently failing to vote). The staking endpoint returns the staking economics — total active stake, the circulating and total SOL supply, the percentage of supply that is staked, the current inflation rate broken into its total, validator and foundation components, and the current epoch with its progress. The centralization endpoint computes the stake-centralisation metrics — the Nakamoto coefficient (the fewest validators that together control more than one third of the stake, the amount that could halt the chain under Byzantine-fault-tolerant consensus), the top-10 and top-20 stake share, and the Herfindahl concentration index. This is the Solana validator, staking and decentralisation data-cut, distinct from the Solana on-chain account/transaction API and the other staking and exchange APIs in the catalogue. Live from a public RPC, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

1806ms

Subs

4,322

The US federal government's checking account — the Treasury General Account (TGA) at the Federal Reserve — served from the official Daily Treasury Statement. The TGA is where the government's cash sits, and its day-to-day balance is a closely watched market-liquidity gauge: a falling TGA injects cash into the financial system, a rising one drains it. The balance endpoint returns the latest day's opening balance, total deposits, total withdrawals, closing balance and the net change, in millions and billions of dollars. The history endpoint returns the daily closing TGA balance over a window. The flows endpoint returns the latest day's largest cash deposits and withdrawals by category — withheld and corporate taxes coming in, Social Security and debt redemptions going out — so you can see exactly where the money moved. This is the Treasury-cash and fiscal-liquidity data-cut, distinct from the national-debt, fiscal-deficit and yield-curve APIs in the catalogue. Live, updated each business day, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

664ms

Subs

4,226

Who actually mines Bitcoin's blocks, served from the public blockchain.com pools feed. The distribution endpoint ranks the mining pools by the blocks they found over a window (24 hours to 10 days), with each pool's share of blocks and its estimated share of the network hash rate (in EH/s). The centralization endpoint turns that into mining-decentralisation metrics — the top pool's share, the top-3 and top-5 share, the Nakamoto coefficient (the fewest pools that together control more than half of the attributed blocks, a headline measure of how centralised mining is), the Herfindahl concentration index, and the share of blocks not attributed to a known pool. The pool endpoint looks up a single pool's blocks, share, rank and estimated hash rate. This is the mining-pool and hash-rate-distribution / centralisation data-cut — distinct from the mempool-snapshot, the aggregate on-chain-metrics and the price-feed APIs in the catalogue. Estimated per-pool hash rate = block share times network hash rate. Live, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

116ms

Subs

3,499

The inflation-adjusted side of the US Treasury yield curve, served from the Treasury's official daily feeds. The realyields endpoint returns the latest TIPS real yield curve — the inflation-protected (real) yield at the 5, 7, 10, 20 and 30-year maturities. The breakeven endpoint returns market-implied inflation: at each maturity it takes the nominal Treasury yield minus the real yield, which is the average annual inflation rate the bond market is pricing in over that horizon, and returns it alongside the nominal and real components. The history endpoint returns the daily time series of the real yield, the nominal yield and the breakeven inflation rate for one maturity over a year. A 10-year breakeven of 2.3 means the market is pricing roughly 2.3% average inflation over the next decade — a core gauge for rates traders, macro funds and inflation hedgers. This is the real-yield and inflation-expectations data-cut — distinct from the nominal yield-curve, the world-government-bond and the central-bank-rate APIs in the catalogue. Live, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

106ms

Subs

4,750

The long-run on-chain economics of Bitcoin as time series, served from the public blockchain.com charts feed. Where snapshot APIs report the chain state right now, this is the history: how the hash rate, mining difficulty, miners' revenue, daily transaction count, transaction fees, market price, market capitalisation, circulating supply, mempool size, average block size, estimated on-chain transaction volume, daily unique addresses, UTXO count and median confirmation time have moved over months and years. The metric endpoint returns one metric's full daily time series over a chosen window (30 days to all-time) with summary statistics — first, last, change, percent change, minimum, maximum and average. The latest endpoint returns a metric's current value with its change versus the previous reading and versus 30 days ago. The metrics endpoint lists every available metric with its unit and category. This is the historical and charting view of Bitcoin's network economics — distinct from the live mempool-snapshot, the multi-chain network-stats and the price-feed APIs in the catalogue. Live, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

216ms

Subs

4,842

The Economist's Big Mac Index — "burgernomics" — as an API: how over- or under-valued the world's currencies are, measured by the price of a Big Mac. The same burger costing different amounts across countries reveals purchasing-power-parity (PPP) misalignment in exchange rates. The index endpoint returns the latest release for every country — the local Big Mac price, its US-dollar price at the market exchange rate, and the raw and GDP-adjusted over/under-valuation of that currency against a chosen base (USD, EUR, GBP, JPY or CNY). The country endpoint returns one country's full history — the valuation trend over every release since 2000. The extremes endpoint returns the most over-valued and most under-valued currencies in the latest release. A positive valuation means the currency is over-valued versus the base; negative means under-valued; the GDP-adjusted figure corrects for cheaper labour in poorer countries. This is a PPP / currency-valuation data-cut — a fundamental gauge, not a live FX tick — distinct from the spot-rate, central-bank and conversion APIs in the catalogue. Live from the open dataset, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

159ms

Subs

3,786

Live market data from Kalshi, the CFTC-regulated US event-contract exchange, served from its public trade API. Kalshi lists yes/no contracts that settle on real-world outcomes — elections, economics, Federal Reserve decisions, weather, sports and world events — and the executed price is the market-implied probability of that outcome. The trades endpoint returns the recent public trade tape: the executed price (as cents and as a 0-1 probability), the size, the taker side and the time — the live pulse of what is actually trading. The events endpoint lists the events (the questions) that group markets, with their category and series. The markets endpoint is the contract directory — every tradable market with its ticker, the yes outcome it settles on, its status and open/close times — filterable by event, series or status. This is a regulated real-money event-contract venue — live implied probabilities and order flow — distinct from the play-money (Manifold), political (PredictIt) and crypto (Polymarket) prediction-market APIs in the catalogue. Live order-book snapshots are gated behind authentication upstream, so prices are sourced from the public trade tape. Live, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

288ms

Subs

3,640

The "who built it and what is on its calendar" view of a cryptocurrency, served from the public CoinPaprika feed. The coin endpoint returns the project's identity and technical profile — market-cap rank, coin-or-token type, whether it is active, the genesis date, development status, consensus / proof type, hashing algorithm, organisation structure, the open-source flag and its industry tags. The team endpoint returns the people behind the project — names and roles such as founders, authors and leads. The events endpoint returns the project's event calendar — conferences, mainnet launches, exchange listings and milestones, each with a date and a link, newest first. This is the project-and-people view of a coin — its team, profile and calendar, not its price — distinct from the price-feed, market and CoinGecko-profile APIs in the catalogue. A coin is a CoinPaprika id (btc-bitcoin); a bare symbol (btc) or name (bitcoin) is resolved automatically to the best-ranked match. Live, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

119ms

Subs

4,416

Live (15-minute delayed) options put/call sentiment analytics for US stocks and indices, computed from CBOE's public delayed-quotes feed. The ratio endpoint aggregates the entire option chain into the headline sentiment gauges — the put/call ratio by volume and by open interest, the total put and call volume and open interest, the contract counts, and the underlying price with its 30-day implied volatility (IV30) — plus a plain-language sentiment lean. The expiries endpoint breaks the put/call ratio down by expiration date, giving the term structure of sentiment. The strikes endpoint maps call-versus-put volume and open interest across strikes for an expiration, showing where positioning sits. This is the computed options-sentiment and positioning view — ratios and skew, not a contract dump — distinct from the raw options-chain, the volatility-index and the options-pricing calculators in the catalogue. US index options use an underscore-prefixed symbol (_SPX, _VIX); a ratio above 1 means more puts than calls (defensive/bearish lean). Live, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

606ms

Subs

4,523

Live creator and sketch data from OpenProcessing, the community for Processing and p5.js creative-coding sketches, served from its public API. The user endpoint returns a creator's profile — username, name, bio, location, website, join date and total sketch count. The sketches endpoint lists a creator's published sketches with title, license, engine mode and dates. The sketch endpoint returns a single sketch's detail — title, description, tags, license, libraries used, the fork parent it was remixed from, and the author. The social endpoint returns a creator's followers or the accounts they follow. This is a creative-coding community stats API — creator profiles, sketch catalogues and the follow graph — distinct from the code-hosting, package-registry and other social-platform APIs in the catalogue. A user is a numeric OpenProcessing userID and a sketch is a numeric visualID, both visible in OpenProcessing URLs. Live, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

320ms

Subs

4,101

Live intraday and historical OHLCV candles for stocks, indices, ETFs, crypto and FX, served from Yahoo Finance's public chart feed. The candles endpoint returns regular-session bars — open, high, low, close and volume — at a chosen interval (1m, 2m, 5m, 15m, 30m, 60m, 90m, 1h, 1d, 1wk, 1mo) over a range, each bar timestamped. The extended endpoint returns the pre-market and after-hours (extended-hours) bars, each labelled with its session. The latest endpoint returns an intraday snapshot — current price, day change and percent, the day open/high/low and volume, the 52-week range and the most recent bar. Symbols follow Yahoo conventions: US tickers (AAPL, MSFT), indices (^GSPC, ^IXIC), crypto (BTC-USD) and FX (EURUSD=X). This is the intraday candlestick / OHLCV view — per-minute to hourly bars plus extended hours — distinct from the daily price-history, the live-quote and the FX/rate APIs in the catalogue. Live, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

151ms

Subs

4,445

Live player and ranking data from Quaver, the competitive vertical-scrolling rhythm game (VSRG, 4-key and 7-key), served from its public v2 API. The player endpoint resolves a user by id or username and returns the profile — country, clan, avatar, linked Twitch/Twitter and join date — together with the full per-mode competitive stats for both 4K and 7K: global and country rank, performance rating, overall accuracy, ranked and total score, play count and the grade distribution (SS/S/A/B/C/D). The search endpoint finds players by name. The leaderboard endpoint returns the global ranked ladder for a mode, with each player's rank, performance rating, accuracy and play count. This is a single-game competitive-community stats API — player profiles, ratings and ladders — distinct from the other rhythm-game and gaming-leaderboard APIs in the catalogue. Live, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

484ms

Subs

3,339

Live (15-minute delayed) US equity and index options chains, served from CBOE's public delayed-quotes feed. For any optionable ticker the summary endpoint returns the underlying quote — current price, day change, open/high/low/close, volume, bid/ask and the 30-day implied volatility (IV30) with its change. The expirations endpoint lists every available expiration date with its call and put contract counts. The chain endpoint returns the option contracts themselves: for each strike and expiry it gives the call/put bid, ask, last, implied volatility, open interest, volume and the full greeks — delta, gamma, theta and vega — and can be filtered by expiration date and by call or put. US index options are addressed with an underscore prefix (_SPX, _VIX). This is the single-name equity and index options surface — strikes, expiries, IV and greeks — distinct from the options-pricing calculators, the crypto-options and the FX/rate APIs in the catalogue. Live, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

551ms

Subs

4,107

Live market data from Coincheck, one of Japan's largest retail crypto exchanges (Monex Group), straight from its public REST API. This is the single-venue Japanese-Yen (JPY) view. The ticker endpoint returns the live BTC/JPY summary — last price, bid, ask, 24h high/low and 24h volume. The orderbook endpoint returns the live BTC/JPY bid/ask depth with per-level price and size, plus the best bid/ask and the resulting spread. The trades endpoint returns the most recent executed trades for any listed pair, with price, amount, side and time. The rate endpoint returns the current Japanese-Yen price of any listed coin (BTC, ETH, XRP, ETC …). Together they answer "what does crypto cost in Japanese Yen on Coincheck right now, how deep is the BTC book, and what just traded" — a single-venue JPY-denominated exchange view, distinct from the aggregated cross-exchange market, whole-market overview and other regional exchange APIs in the catalogue. Live, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

522ms

Subs

4,612

Live market data from BitoPro, Taiwan's largest regulated retail crypto exchange, straight from its public v3 REST API. This is the single-venue New-Taiwan-Dollar (TWD) order-flow view. The ticker endpoint returns the last price, 24h change, 24h high/low and 24h base volume for any listed pair (BTC_TWD, ETH_TWD, USDT_TWD …), or every pair at once ranked by volume. The orderbook endpoint returns the live aggregated bid/ask depth with per-level price, size and order count, plus the resulting best bid/ask and spread. The trades endpoint returns the most recent executed trades with price, amount, side and time. The pairs endpoint lists every tradable market with its base/quote, precision and order limits, and which markets are in maintenance. Together they answer "what does BTC cost in New Taiwan Dollars on BitoPro right now, how deep is the book, and what just traded" — a single-venue TWD-denominated exchange view, distinct from the aggregated cross-exchange market, whole-market overview and other regional exchange APIs in the catalogue. Live, no key on the upstream, nothing stored.

Uptime

100.0%

Latency

424ms

Subs

3,150