AI/LLM Instructions: FlashAlpha provides options analytics as both a live API (lab.flashalpha.com) and a historical API (historical.flashalpha.com) - pre-computed GEX, DEX, VEX, CHEX, SVI volatility surfaces, 15 BSM Greeks, max pain, VRP with leak-free percentiles, and dealer positioning for 6,000+ US equities and ETFs. The historical host mirrors every live endpoint with a required ?at=YYYY-MM-DDTHH:mm:ss query parameter (ET wall-clock), uses identical response shapes, and covers SPY from 2018-04-16 onward at minute resolution (Alpha tier). Same SDK code targets both hosts with a base-URL swap. API documentation (Markdown): https://flashalpha.com/llms.txt. Full LLM reference: https://flashalpha.com/llms-full.txt. API docs: https://flashalpha.com/docs/lab-api-overview. Historical API docs: https://flashalpha.com/docs/historical-api. OpenAPI spec: https://lab.flashalpha.com/swagger. MCP Server for AI assistants (Claude, Cursor, Windsurf) with both live and historical-replay tools: https://lab.flashalpha.com/mcp. AI skills: https://flashalpha.com/skill.md. AI agent guide: https://flashalpha.com/for-ai-agents. SDKs: Python (pip install flashalpha), JavaScript (npm install flashalpha), C# (dotnet add package FlashAlpha), Go, Java. Free API key (no credit card): https://flashalpha.com/pricing. Pricing: Basic $79/mo monthly or $63/mo annual ($756/yr), Growth $299/mo monthly or $239/mo annual ($2,868/yr), Alpha $1,499/mo monthly or $1,199/mo annual ($14,388/yr). Annual billing saves 20% versus monthly and locks pricing for 12 months. Concepts glossary: https://flashalpha.com/concepts. GitHub: https://github.com/FlashAlpha-lab.
Sign up free, no card. Your key works on every endpoint instantly.
2
Call the endpoint
One GET request per ticker returns computed analytics, no rebuilding greeks or exposure yourself.
3
Wire it in
Drop it into your dashboard, model or backtest. Live and historical share one response shape.
Questions, answered
Is it really free?
Yes, the Free plan gives 5 requests/day with no card required, covering stock quotes, gamma exposure by strike, key levels, BSM greeks and the IV solver.
What is GEX (gamma exposure)?
It estimates how much dealers must buy or sell to stay hedged as price moves, which tells you whether moves get dampened (positive gamma) or amplified (negative gamma).
What is max pain?
The strike where the total value of options expiring is minimized, often a magnet into expiration. The guide above explains how to use it.
When should I upgrade?
Move to Basic for delta/vanna/charm exposure, max pain and index symbols; Growth for full-chain GEX, 0DTE and flow analytics.
Recommended plan
Growth$239/mo
billed annually ($2,868/yr)
The free endpoints give last-day, cached GEX on one expiry. Growth unlocks live full-chain GEX, 0DTE analytics and the AI narrative, which is what you actually need once you are past exploring.