{"name":"Quant Data API","version":"3.4.0","site":"https://quantdata.uk","docs":"https://quantdata.uk/docs","api_reference":"https://quantdata.uk/docs","interactive_docs":"https://api.quantdata.uk/docs","openapi":"https://api.quantdata.uk/openapi.json","auth":"Send your API key in the X-API-Key header; keys start with qd_. Request a free key by email at POST /v1/access/free-key. No account, card or GUI is required. The four endpoints share 10 successful calls per UTC day on a free key.","free_api_key":{"action":"request_free_api_key","method":"POST","url":"https://api.quantdata.uk/v1/access/free-key","content_type":"application/json","body_schema":{"email":"required email address","marketing_opt_in":"optional boolean; send true only with explicit user consent","source":"optional short string such as agent, homepage, docs"},"delivery":"The qd_ key is sent only to that email address.","cost_usd":0,"card_required":false,"calls_per_utc_day":10,"covers":["brooks","weis","maxpain","gamma"]},"anonymous_first_look_calls_per_day":1,"mcp":{"url":"https://api.quantdata.uk/mcp","transport":"streamable-http","registry_name":"uk.quantdata/quantdata","note":"The same four endpoints are available as MCP tools. The MCP tool request_free_api_key can send a free key to an email address; then connect with X-API-Key for 10 successful calls per UTC day or subscribe for uninterrupted use."},"plan":{"price_usd_per_month":149,"includes":"every endpoint","free_trial_days":3,"checkout_url":"https://buy.stripe.com/00weVdaSndG37QMfi59Ve06","how_it_works":"A card is collected up front and the first 3 days are free. An existing free key is upgraded in place when the checkout uses the same email; otherwise a paid key is shown after checkout. A person has to complete the checkout — card authentication (3-D Secure) requires the cardholder and cannot be done unattended by an AI agent."},"paid_endpoints":{"/v1/brooks/{symbol}":"Rolling Brooks price-action events (range breakout, spike, range position) with pre-registered outcome rates and a calibrated per-event estimate. Works in the US session, the Asian session, and the Asia-close-to-US-open gap window.","/v1/weis/{symbol}":"Volume-weighted wave structure and pre-registered wave events, each with its measured win rate.","/v1/maxpain/{symbol}":"Max pain strike per expiration, from open interest alone. Pure arithmetic, no pricing model. US listed options only.","/v1/gamma/{symbol}":"Estimated dealer gamma exposure: net GEX, the zero-gamma (flip) level and the heaviest strikes. Black-Scholes estimate, not observed data. US listed options only."},"free_without_a_key":[{"url":"https://quantdata.uk/max-pain/{ticker}","cost_usd":0,"returns":"Max pain (the option strike at which option buyers lose the most in aggregate at expiration), put/call ratio, call and put walls and open interest by expiration — one page per covered US stock or ETF, rebuilt nightly from the latest upstream end-of-day option open interest available. Each page states its own settlement date. Lowercase tickers. Static pages, no key, no account."},{"url":"https://quantdata.uk/gex/{ticker}","cost_usd":0,"returns":"Estimated dealer gamma exposure for covered US stocks and ETFs: net and gross GEX, the zero gamma (flip) level and the heaviest strikes, rebuilt nightly from the latest upstream settlement available. Each page states its own settlement date. Same static-page rules: lowercase tickers, no key, no account."},{"url":"https://quantdata.uk/methodology","cost_usd":0,"returns":"How every number on this service was measured: held-out years, pre-registration, calibration, and the full fact-check of the trading literature's famous probability claims against 3,946 S&P 500 futures trading days, printed as a table. Read this before deciding whether the paid endpoints are worth anything to you."}],"symbol_format":"US ticker NVDA · HK 3690.HK · China A-share 600519 · futures ES=F GC=F","support":"quantdata@quantdata.uk","what_you_get":"Descriptive statistics and model output: how sessions that resembled the current one resolved historically. Not a forecast, not a recommendation to buy or sell, not investment advice.","disclaimer":"Educational analytics, not investment advice."}