- API
- Implied volatility
- Monies surface
Implied volatility API, GET /monies/{ticker}
What does the smoothed vol surface say about SPY at each delta and expiration?
The market-implied vol surface, the forecast surface, or the comparison between the two. Returns the ATM IV, slope, curvature and the smile across delta points for each expiration, either as the market's smoothed surface, the vendor forecast, or a rich-versus-cheap comparison of the two.
The answer, in one call
Units first,
then the request.
atm_iv and the smile values are annualised percentage points; slope and curvature are surface parameters.
Surface points are the data feed's smoothed fit, not raw quotes. Expirations may include the most recent expired date; filter on dte greater than 0.
curl -H "Authorization: Bearer avmcp_YOUR_TOKEN" \
"https://apexvol.com/api/mcp/data/monies/SPY"import requests
headers = {"Authorization": "Bearer avmcp_YOUR_TOKEN"}
r = requests.get("https://apexvol.com/api/mcp/data/monies/SPY", headers=headers)
r.raise_for_status()
data = r.json()["data"]
print(data["delta_points"])Show me the SPY vol surface by delta for the next 3 expirations.
The assistant calls get_monies_surface and answers from the JSON below.{
"success": true,
"data": {
"delta_points": [
0,
5,
10
],
"expirations": [
{
"atm_iv": 6.62,
"confidence": 0.304,
"curvature": 0,
"dte": -4,
"earn_effect": 0,
"expiration": "2026-09-04",
"slope": 0,
"smile": {
"0": 7.03,
"5": 7.17,
"10": 7.31,
"15": 7.45,
"20": 7.59,
"25": 7.73,
"30": 7.87,
"35": 8.02,
"40": 8.16,
"45": 8.3,
"50": 8.44,
"55": 8.58,
"60": 8.72,
"65": 8.87,
"70": 9.01,
"75": 9.15,
"80": 9.29,
"85": 9.43,
"90": 9.57,
"95": 9.71,
"100": 9.86
},
"stock_price": 770.25
},
{
"atm_iv": 5.8,
"confidence": 1,
"curvature": 0.1178,
"dte": 0,
"earn_effect": 0,
"expiration": "2026-09-08",
"slope": 4.7079,
"smile": {
"0": 6.01,
"5": 5.54,
"10": 5.49,
"15": 5.48,
"20": 5.5,
"25": 5.53,
"30": 5.57,
"35": 5.63,
"40": 5.7,
"45": 5.79,
"50": 5.89,
"55": 6.01,
"60": 6.16,
"65": 6.33,
"70": 6.53,
"75": 6.78,
"80": 7.09,
"85": 7.48,
"90": 8.0,
"95": 8.79,
"100": 11.47
},
"stock_price": 770.25
},
{
"atm_iv": 6.92,
"confidence": 1,
"curvature": 0.1286,
"dte": 1,
"earn_effect": 0,
"expiration": "2026-09-09",
"slope": 4.5584,
"smile": {
"0": 6.65,
"5": 6.52,
"10": 6.54,
"15": 6.55,
"20": 6.56,
"25": 6.58,
"30": 6.6,
"35": 6.64,
"40": 6.7,
"45": 6.79,
"50": 6.9,
"55": 7.04,
"60": 7.23,
"65": 7.47,
"70": 7.77,
"75": 8.15,
"80": 8.64,
"85": 9.27,
"90": 10.16,
"95": 11.56,
"100": 16.73
},
"stock_price": 770.25
}
],
"stock_price": 770.25,
"success": true,
"ticker": "SPY",
"timestamp": "2026-09-08T04:24:54.451794"
}
}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. | |
surface | query | implied | implied, forecast, comparison | Which surface to return. |
Field by field
What each
number means.
expirations[].expiration, dte, atm_iv- The ATM point per expiration.
expirations[].slope, curvature, smile- The smile parameters and the values at each delta point.
delta_points- The deltas the smile is sampled at.
expirations[].earn_effect- Earnings contribution to that expiration's IV.
Access, limits, errors
Before the
first call.
- Plan
- Pro Pro 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;403Pro 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_monies_surface by name. One URL, a sign-in, no token to paste.
Show me the SPY vol surface by delta for the next 3 expirations.
YouWhere is the forecast surface cheaper than the market on NVDA?
YouWhat is the 25-delta put IV versus ATM on AAPL for October?
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.