ZeroGEX — SPX/SPY/QQQ/NDX dealer positioning
Description
Free delayed gamma flip, call and put walls, max pain and net dealer gamma
What our measurements say
ZeroGEX — SPX/SPY/QQQ/NDX dealer positioning is a remote MCP server published at zerogex.io. It has been probed 6 times since 9/12/2026. It answered in 6 of them (100.0%), a near-uninterrupted record. Median response time is 623 ms, a delay an agent will notice. It offers a narrow, focused set of 2 tools. On the protocol side it still runs 2025-11-25 and has not moved to the newer spec.
Agent readability score
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
Agent readability score
Agent readability score
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| Run | Era | Modern | ms | Legacy | ms | Versions |
|---|---|---|---|---|---|---|
| 2026-09-13 01:33:33 | Legacy | 400 | 623 | 200 | 615 | 2025-11-25 |
| 2026-09-12 23:31:36 | Legacy | 400 | 494 | 200 | 493 | 2025-11-25 |
| 2026-09-12 21:29:15 | Legacy | 400 | 1528 | 200 | 1546 | 2025-11-25 |
| 2026-09-12 19:27:29 | Legacy | 400 | 726 | 200 | 2108 | 2025-11-25 |
| 2026-09-12 17:24:09 | Legacy | 400 | 447 | 200 | 1117 | 2025-11-25 |
| 2026-09-12 15:21:42 | Legacy | 400 | 493 | 200 | 519 | 2025-11-25 |
Schema compliance
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
- tools/list schema valid
- inputSchema is valid JSON Schema
- Smoke test not run this round
- Cold-start: cold 146ms → warm 152ms (penalty 0ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
get_gamma_levelsModeled options dealer-positioning levels for one underlying: gamma flip, call wall, put wall, max pain, same-day pin strike, and net dealer gamma at spot (whose sign is the regime). Use for "where is the gamma flip", "where are the walls", "is SPX in positive gamma". FREE DELAYED DATA — up to 15 minutes behind live, and the response states its own age; quote that age and never call these levels live. Not a price feed, not a forecast, and not a trade recommendation: it describes dealer positioning and says nothing on its own about direction. A null level means the modeled book does not support that level right now — report it as unavailable, never as zero.
symbolstringrequired
get_market_gamma_overviewOne-line dealer-positioning summary for all six covered underlyings (SPX, SPY, QQQ, NDX, ES, NQ) in a single call: spot, modeled regime and gamma flip for each. Use for broad openers like "what does dealer positioning look like today" or "which indices are in negative gamma", instead of calling get_gamma_levels six times. Same free 15-minute-delayed data and the same caveats. When the question is about one symbol, call get_gamma_levels instead — this tool omits the walls, max pain and pin strike.
Availability history
Each block is one measurement round. Green: working response. Amber: responded but the server was returning errors (5xx). Red: no response at all.
Era history
Each cell is one probe run. Faded cells are incomplete probes — one leg did not answer, so the era is inconclusive.
Response time history
The two probe legs separately: modern server/discover and legacy initialize.
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Added to watch — era: Legacy
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