gex.live has an MCP server. Add it to Claude, Cursor, ChatGPT or any MCP client and the assistant can read the dealer-positioning archive and drive the backtesting Lab on your behalf. The one-line version is the title. Here is the rest.
Two tiers, one rule: free data stays free
Free, no key — the same finished-session data that is free on the website:
list_sessions — finished SPX sessions in the archive, newest first, paged (max 50 a call).
get_session(day) — one session's dealer-positioning summary: OHLC, the zero-gamma flip and how often price crossed it, call/put walls, the hold band, net-gamma percentile, ATM IV at the open. Measurements only.
