- API
- Implied volatility
- IV rank
Implied volatility API, GET /iv-rank/{ticker}
Is NVDA's implied volatility high or low for NVDA right now?
IV rank and IV percentile against the last year, with the range they were measured on. Returns where today's implied volatility sits inside its own 52-week range (iv_rank, 0 to 100) and the share of days that closed with lower IV (iv_percentile), plus the min, max, mean and state label the numbers were built from.
The answer, in one call
Units first,
then the request.
current_iv, iv30d and the range bounds are annualised IV in percentage points (34.43 means 34.43%). iv_rank and the percentiles are 0 to 100.
iv_basis names the daily series the rank is measured on; iv30d is the 30-day constant-maturity IV used by the VRP endpoints, so the two can differ slightly. iv_percentile is the one-year percentile from the data feed.
curl -H "Authorization: Bearer avmcp_YOUR_TOKEN" \
"https://apexvol.com/api/mcp/data/iv-rank/NVDA"import requests
headers = {"Authorization": "Bearer avmcp_YOUR_TOKEN"}
r = requests.get("https://apexvol.com/api/mcp/data/iv-rank/NVDA", headers=headers)
r.raise_for_status()
data = r.json()["data"]
print(data["iv_rank"])What is NVDA's IV rank and percentile right now?
The assistant calls get_iv_rank and answers from the JSON below.{
"success": true,
"data": {
"current_iv": 34.43,
"data_source": "iv_rank_1y",
"historical_data_points": 252,
"is_full_year": true,
"iv30d": 33.05,
"iv_basis": "vendor_ivrank_series",
"iv_max_52w": 48.38,
"iv_mean": 38.53,
"iv_median": 38.39,
"iv_min_52w": 32.01,
"iv_percentile": 12.0,
"iv_percentile_1m": 66.67,
"iv_percentile_1y": 12,
"iv_percentile_source": "cores_ivPctile1y",
"iv_rank": 14.79,
"iv_rank_1m": 54.08,
"iv_rank_1y": 14.79,
"iv_state": "VERY_LOW",
"iv_std": 3.31,
"iv_stdv_from_mean": -1.49,
"iv_units": "percentage_points",
"lookback_days": 252,
"ticker": "NVDA",
"timestamp": "2026-09-08T05:06:35.749922"
}
}Every response is wrapped as {"success": true, "data": {...}}. Lists in the sample are cut to a few rows so it fits on a page; the shape is exactly what your code receives.
Parameters
Bounded,
and the bounds are stated.
Out-of-range numbers are clamped to the documented range, never silently changed to something else. A missing required field returns 400 with the reason.
| Name | In | Default | Range | Meaning |
|---|---|---|---|---|
ticker required | path | any covered symbol | The underlying, upper case. Use /search to check coverage. | |
lookback_days | query | 252 | 20 to 1260, clamped | Days of history behind the rank and the 1y percentile. |
Field by field
What each
number means.
iv_rank- Today's IV as a position between the 52-week low (0) and high (100).
iv_percentile- Share of lookback days that closed with IV below today's.
current_iv- The IV the rank was computed from, in percentage points.
iv30d- The 30-day constant-maturity IV, the basis the VRP endpoints use.
iv_min_52w, iv_max_52w, iv_mean, iv_std- The range and distribution behind the rank.
iv_state- VERY_LOW to VERY_HIGH so a caller can branch without picking thresholds.
iv_rank_1m, iv_percentile_1m- The same measures over the last month.
Access, limits, errors
Before the
first call.
- Plan
- Premium Premium and above. Tokens are issued to paid and trial accounts from $55 a month; each endpoint follows the tier of its web feature. An endpoint above your plan answers 402 and names the plan it needs.
- Auth
- Bearer token, prefix
avmcp_, created under Account, then API Access. Shown once, hashed at rest, rotates in one click. Always callhttps://apexvol.com, never www. - Limits
- 60 requests a minute and 1,000 an hour per token, plus a monthly allowance by plan. Every response carries the remaining counts in
X-RateLimit-*headers; a 429 carriesRetry-Afterin seconds. - Errors
401no or revoked token;429Retry-After seconds;403Premium plan required;424data feed unavailable, retry. The full list with payload shapes is on the errors page.- Since
- API 1.0. Units, bases and timestamps follow the conventions shared by every endpoint; changes are logged in the API changelog.
- Machine-readable
- This page as Markdown, the family as one file, the whole API as llms-full.txt or OpenAPI 3.1.
The same data, in plain English
Ask for it
in an MCP client.
Connect the ApexVol MCP server and the assistant calls get_iv_rank by name. One URL, a sign-in, no token to paste.
What is NVDA's IV rank and percentile right now?
YouIs implied volatility on AAPL high or low compared with the last year?
YouRank SPY, QQQ and IWM by IV rank.
More in the prompt library. Set the server up in Claude Desktop, Claude Code, Cursor, ChatGPT, VS Code, Windsurf or Gemini CLI.
Included with
every paid plan.
From $55 a month, tier-matched: your token queries the data your plan includes and Pro unlocks the full surface.
Real market data, not a sandbox. See it live on AAPL.