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SYNTHORA Market Index / Volatility Quote (Yahoo Chart)
x402
SYNTHORA Market Index / Volatility Quote (Yahoo Chart) is a paid API for AI agents from yahoo-index-quote.hergertsynthora.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Returns delayed OHLC price history and quotes for major market indices and volatility gauges (e.g. S&P 500, VIX, CBOE 10Y yield) via Yahoo Finance's chart endpoint.
Price / call$0.001
Success—
StatusUnknown
How this service works
Delayed quote and OHLC history for major indices and gauges such as the S&P 500 (^GSPC), VIX (^VIX) and CBOE 10Y yield (^TNX) from Yahoo's keyless chart endpoint (JSON). Serves autonomous risk-sentiment agents and agent-to-agent macro dashboards tracking broad-market benchmarks. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.
Output
A JSON object with an 'ok' boolean, a 'niche' identifier ('yahoo-index-quote'), and a 'result' object containing OHLC price history, timestamps, and quote data for the requested index symbol and time range, sourced from Yahoo Finance's chart endpoint.
Example use cases
VIX spike alert for risk agent
“Fetch the VIX (^VIX) quote and its daily OHLC history for the last 3 months with 1-day intervals — I want to see if volatility has spiked above recent averages.”
S&P 500 intraday trend check
“Get me the S&P 500 (^GSPC) intraday price history for today using 5-minute intervals so I can see how the market has been moving throughout the session.”
CBOE 10Y yield macro dashboard
“Pull the CBOE 10-year yield index (^TNX) OHLC data for the past year with 1-week intervals for my macro dashboard tracking interest rate trends.”
Technical details
Endpoint
POSThttps://yahoo-index-quote.hergertsynthora.com/serviceWhen to prefer
Choose this endpoint when you need quick, keyless access to OHLC history or delayed quotes for major market indices and volatility gauges (^GSPC, ^VIX, ^TNX, etc.) without managing Yahoo Finance API credentials. Ideal for risk-sentiment agents, macro dashboards, and autonomous workflows that need broad-market benchmark data at low cost ($0.001/call via x402).
Side effects
- Invalid or unsupported symbol (e.g. non-index ticker) returns empty or error result
- Unsupported range/interval combination may yield no data
- Yahoo Finance upstream rate limiting or downtime causes failure
- Malformed request body missing required fields returns error
- Stale or delayed data may not reflect real-time prices
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| range | string | range |
| symbol | string | symbol |
| interval | string | interval |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"niche": "yahoo-index-quote",
"result": {}
}
}Tags
x402
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