# GEXLOG Historical SPX Options Market Briefing

> GEXLOG Historical SPX Options Market Briefing is a paid API for AI agents from agent.gexlog.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Returns historical SPX options market briefings including gamma exposure levels, trade signals, AI narratives, and key price levels for a specified date

## Facts

- Endpoint: GET https://agent.gexlog.com/agent/historical
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gexlog-historical-spx-options-market-briefing-40c3cafc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_u8lSF-vkWSDvKyZvrshDS

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability gexlog-historical-spx-options-market-briefing-40c3cafc
```

Example prompt: Pull the full SPX options briefing for January 15, 2025 — both morning and evening reports — including the gamma regime, GEX flip level, put wall, call wall, and the GO/CAUTION/WAIT trade signal.

## When to prefer this

Choose this endpoint when you need structured historical SPX options market data — including gamma exposure levels, AI-generated narratives, and directional trade signals — for a specific past date. It is ideal for backtesting, post-mortem analysis, or reviewing past market conditions. Prefer this over real-time data sources when you need reproducible, time-stamped historical snapshots with both quantitative gamma metrics and qualitative AI narratives.

## Known failure modes

- Invalid or unsupported date format (not YYYY-MM-DD) returns a validation error
- Date outside available historical range returns 404 or empty result — use /agent/dates to discover valid dates
- Invalid report_type value returns an error
- Payment not processed (x402 micropayment failure) returns 402 Payment Required
- Network or server errors return 5xx responses

## How this service works

A live fintech experiment in AI agent payments. WebMCP structured tools and x402 micropayments gate premium financial data. Documentation for agents and developers.

## Output

Returns a structured JSON object keyed by report type (morning, evening, or both), each containing: key SPX price levels (spot, GEX flip, put wall, call wall, max gamma), a market snapshot (SPX, ES, NQ, VIX), gamma regime classification and total GEX, a primary trade signal (GO/CAUTION/WAIT) with confidence score, timestamp of generation, and two AI-generated market narratives (one from Claude, one from Gemini).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "date"
 ],
 "properties": {
  "date": {
   "type": "string",
   "description": "Target date in YYYY-MM-DD format. Use /agent/dates to discover valid dates."
  },
  "report_type": {
   "enum": [
    "morning",
    "evening",
    "weekend",
    "both"
   ],
   "type": "string",
   "description": "Which report to return. 'both' (default) returns morning, evening, and weekend keyed by type."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "date": {
   "type": "string",
   "format": "date"
  },
  "evening": {
   "type": "object",
   "properties": {
    "levels": {
     "type": "object",
     "properties": {
      "current": {
       "type": "number",
       "description": "SPX spot price at generation"
      },
      "gex_flip": {
       "type": [
        "number",
        "null"
       ],
       "description": "GEX flip level, null if no zero crossing in observable chain"
      },
      "put_wall": {
       "type": "number"
      },
      "call_wall": {
       "type": "number"
      },
      "max_gamma": {
       "type": "number"
      }
     },
     "description": "Key price levels from options positioning"
    },
    "market": {
     "type": "object",
     "properties": {
      "es": {
       "type": "number"
      },
      "nq": {
       "type": "number"
      },
      "spx": {
       "type": "number"
      },
      "vix": {
       "type": "number"
      }
     },
     "description": "Current market data snapshot"
    },
    "forecast": {
     "type": "object",
     "properties": {
      "factors": {
       "type": "object",
       "properties": {
        "gamma": {
         "type": "object",
         "properties": {
          "regime": {
           "type": "string",
           "description": "Gamma regime classification"
          },
          "total_gex": {
           "type": "number"
          }
         }
        }
       }
      }
     },
     "description": "Market forecast including gamma regime and expected move"
    },
    "guidance": {
     "type": "object",
     "properties": {
      "signal": {
       "enum": [
        "GO",
        "CAUTION",
        "WAIT"
       ],
       "type": "string",
       "description": "Primary trade signal"
      },
      "confidence": {
       "type": "number"
      }
     },
     "description": "Trade guidance signals"
    },
    "generated_at": {
     "type": "string",
     "format": "date-time",
     "description": "When this briefing was generated"
    },
    "ai_narrative_primary": {
     "type": "string",
     "description": "AI-generated market narrative (Claude)"
    },
    "ai_narrative_secondary": {
     "type": "string",
     "description": "AI-generated market narrative (Gemini)"
    }
   },
   "description": "Full SPX options market briefing with gamma regime, levels, positioning, and AI narrative."
  },
  "morning": {
   "type": "object",
   "properties": {
    "levels": {
     "type": "objec
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gexlog-historical-spx-options-market-briefing-40c3cafc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent.gexlog.com](https://www.zero.xyz/host/agent.gexlog.com/llms.txt)