Quick start
Make your first API call in under five minutes.
Authentication
Get your API key and authenticate your first request.
API reference
Browse all 62 endpoints with interactive try-it-out.
MCP server
Give Claude and other AI clients direct access to the same data.
What you can build
GEX levels & walls
HVL, call resistance, put support, max-pain, expected move - in a
single composable call.
OPEX calendar
Daily / weekly / monthly / quarterly classification with per-expiry
OI, walls, and max-pain.
Filtered options chain
Two-layer projection (
?fields= + ?include=), moneyness filters,
payload caps for desk-friendly responses.IV analytics suite
Surface, term structure, skew, smile, IV-RV, VRP - every standard
slice of the implied-vol surface.
Probability density
Risk-neutral PDF/CDF via Breeden-Litzenberger with confidence-band
interpolation per expiry.
Multi-symbol bundle
BTC + ETH + SOL + HYPE GEX levels in one round-trip - one Redis
MGET, four symbols.Market data bundle
Price, open interest, funding, spot and perp CVD, and liquidations
on one shared time axis, in a single request.
Spot ETF flows
Daily creations and redemptions per fund with running cumulatives,
premium to NAV, and assets under management.
Options tape
Live multi-venue prints over REST and WebSocket, with imbalance,
strike heat, whale prints and flow by strike.
Cross-venue book
Best bid and offer across every venue we collect, with the venue
named on each side and how far apart they are quoting.
Get started in 3 steps
1
Get your API key
Sign in at backquant.com/api-access
and create a key.
2
Make your first request
Pass your key in the
X-API-Key header and call any endpoint.3
Explore the data
Read What is GEX? to ground yourself in what the
data means, then browse the
API reference to discover the rest.