Relative value scan API endpoint, Screeners

The answer, in one call

Units first,
then the request.

iv_percentile 0 to 100; ratios unitless; z_score in standard deviations; vrp in points.

iv_spy_ratio is 30-day IV divided by SPY's; the average is one year.

curlBearer token from Account, then API Access

curl -H "Authorization: Bearer avmcp_YOUR_TOKEN" \
     "https://apexvol.com/api/mcp/data/relative-value-scan?limit=5"

Pythonrequests, nothing else

import requests

headers = {"Authorization": "Bearer avmcp_YOUR_TOKEN"}
params = {"limit": "5"}
r = requests.get("https://apexvol.com/api/mcp/data/relative-value-scan", headers=headers, params=params)
r.raise_for_status()
data = r.json()["data"]
print(data["total_matches"])

In Claude, Cursor or ChatGPTthrough the MCP server, no code

You

Which stocks have IV stretched relative to SPY?

The assistant calls scan_relative_value and answers from the JSON below.

viewmean_reversion or pairs

limit1 to 50

thresholdz-score

Tokens come with every paid or trial plan. Sign in and create one under Account, then API Access, or start a trial. Your ticker, your budget.

GET /api/mcp/data/relative-value-scan?limit=5200, application/json, captured 2026-09-08

{
  "success": true,
  "data": {
    "results": [
      {
        "avg_opt_volume": 1062.0,
        "chg_1w": 0.09,
        "days_to_earnings": null,
        "direction": "rich",
        "iv_percentile": 98.0,
        "iv_spy_ratio": 18.6563,
        "iv_spy_ratio_avg_1y": 0.26,
        "market_cap": 105418148000.0,
        "price": 100.47,
        "sector": "N/A",
        "ticker": "SGOV",
        "vrp": 1.61,
        "z_score": 55.2216
      },
      {
        "avg_opt_volume": 16.0,
        "chg_1w": -1.32,
        "days_to_earnings": null,
        "direction": "rich",
        "iv_percentile": 43.0,
        "iv_spy_ratio": 3.8661,
        "iv_spy_ratio_avg_1y": 0.21,
        "market_cap": 549319000.0,
        "price": 8.23,
        "sector": "Real Estate",
        "ticker": "ILPT",
        "vrp": -22.38,
        "z_score": 13.4584
      },
      {
        "avg_opt_volume": 149.0,
        "chg_1w": 8.04,
        "days_to_earnings": null,
        "direction": "rich",
        "iv_percentile": 56.0,
        "iv_spy_ratio": 3.7184,
        "iv_spy_ratio_avg_1y": 0.21,
        "market_cap": 6150466000.0,
        "price": 2.15,
        "sector": "Utilities",
        "ticker": "CIG",
        "vrp": -31.59,
        "z_score": 12.9078
      }
    ],
    "threshold": 1.5,
    "total_matches": 5,
    "total_scanned": 5963
  }
}

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
`view`	query	mean_reversion	mean_reversion or pairs	Which scan.
`limit`	query	20	1 to 50	Rows.
`threshold`	query	1.5	z-score	Minimum stretch.

Field by field

What each
number means.

results[].ticker, iv_spy_ratio, iv_spy_ratio_avg_1y, z_score, direction: The stretch.
results[].iv_percentile, vrp, days_to_earnings: Context.
total_matches, total_scanned, threshold: What ran.

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 call https://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 carries Retry-After in seconds.
Errors: 401 no or revoked token; 429 Retry-After seconds; 403 Pro plan required; 424 data 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 scan_relative_value by name. One URL, a sign-in, no token to paste.

Prompts that hit this endpointcopy one into Claude, Cursor or ChatGPT

You

Which stocks have IV stretched relative to SPY?

You

Find rich-versus-cheap vol pairs.

You

Show relative-value stretches above 2 standard deviations.

More in the prompt library. Set the server up in Claude Desktop, Claude Code, Cursor, ChatGPT, VS Code, Windsurf or Gemini CLI.

Screeners APIRun the platform's preset screens over every liquid name, read the market's volatility regime with sector and ETF heatmaps, find the names whose IV is stretched against SPY, and check one chain for mispriced butterflies and skew. Volatility Arbitrage: Profiting From Mispriced IVVolatility arbitrage explained: profit from mispriced implied volatility with IV-vs-realized, calendar, skew and dispersion trades. scan_relative_value in an MCP clientPrompts for Claude, Cursor and ChatGPT that call this tool.

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.

Start free trial Create a free account

Real market data, not a sandbox. See it live on AAPL.

Whose IV is stretched versus SPY, and which pairs look rich against cheap?

Units first,then the request.

Bounded,and the bounds are stated.

What eachnumber means.

Before thefirst call.

Ask for itin an MCP client.

The rest of the family,and the explainer behind it.

Included withevery paid plan.