1. API
  2. Options chain
  3. Historical chain

Options chain API, GET /chain-at-time/{ticker}

How was SPY's 21 August chain priced at the close on 14 August?

The end-of-day chain snapshot for a past trade date. Returns calls and puts for one expiration as they were priced at the close of a past trading day, with quotes, IV, Greeks, volume and open interest.

Run it on your ticker Download as Markdown Copy for your AI
ProPlan and above, from $55/mo
1MCP tool that calls it
2026-09-08Sample captured from the live endpoint

The answer, in one call

Units first,
then the request.

Prices in dollars; implied_vol as a decimal; Greeks per share.

End-of-day snapshot from the historical feed. Both the expiration and the trade date must be past dates.

curlBearer token from Account, then API Access
curl -H "Authorization: Bearer avmcp_YOUR_TOKEN" \
     "https://apexvol.com/api/mcp/data/chain-at-time/SPY?expiration=2026-08-21&trade_date=2026-08-14"
Pythonrequests, nothing else
import requests

headers = {"Authorization": "Bearer avmcp_YOUR_TOKEN"}
params = {"expiration": "2026-08-21", "trade_date": "2026-08-14"}
r = requests.get("https://apexvol.com/api/mcp/data/chain-at-time/SPY", headers=headers, params=params)
r.raise_for_status()
data = r.json()["data"]
print(data["strike"])
In Claude, Cursor or ChatGPTthrough the MCP server, no code
You

Show the SPY chain for 21 August as it was priced on 14 August.

The assistant calls get_historical_chain and answers from the JSON below.

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/chain-at-time/SPY?expiration=2026-08-21&trade_date=2026-08-14200, application/json, captured 2026-09-08
{
  "success": true,
  "data": {
    "calls": [
      {
        "ask": 4.75,
        "bid": 4.69,
        "delta": 0.5747,
        "epsilon": -0.0857,
        "expiration": "2026-08-21",
        "gamma": 0.0436,
        "implied_vol": 0.0895,
        "open_interest": 54326,
        "rho": 0.0848,
        "right": "C",
        "strike": 775,
        "theta": -0.3008,
        "underlying_price": 776.07,
        "vega": 0.4203,
        "volume": 6045
      },
      {
        "ask": 4.14,
        "bid": 4.12,
        "delta": 0.5315,
        "epsilon": -0.0792,
        "expiration": "2026-08-21",
        "gamma": 0.0452,
        "implied_vol": 0.0885,
        "open_interest": 5227,
        "rho": 0.0785,
        "right": "C",
        "strike": 776,
        "theta": -0.2954,
        "underlying_price": 776.07,
        "vega": 0.4277,
        "volume": 8446
      },
      {
        "ask": 3.59,
        "bid": 3.57,
        "delta": 0.486,
        "epsilon": -0.0724,
        "expiration": "2026-08-21",
        "gamma": 0.0462,
        "implied_vol": 0.0874,
        "open_interest": 5722,
        "rho": 0.0718,
        "right": "C",
        "strike": 777,
        "theta": -0.2877,
        "underlying_price": 776.07,
        "vega": 0.427,
        "volume": 15012
      }
    ],
    "expiration": "2026-08-21",
    "puts": [
      {
        "ask": 3.13,
        "bid": 3.12,
        "delta": -0.4253,
        "epsilon": -0.0857,
        "expiration": "2026-08-21",
        "gamma": 0.0436,
        "implied_vol": 0.09,
        "open_interest": 6989,
        "rho": -0.0637,
        "right": "P",
        "strike": 775,
        "theta": -0.3008,
        "underlying_price": 776.07,
        "vega": 0.4203,
        "volume": 17977
      },
      {
        "ask": 3.55,
        "bid": 3.53,
        "delta": -0.4685,
        "epsilon": -0.0792,
        "expiration": "2026-08-21",
        "gamma": 0.0452,
        "implied_vol": 0.0889,
        "open_interest": 1969,
        "rho": -0.0702,
        "right": "P",
        "strike": 776,
        "theta": -0.2954,
        "underlying_price": 776.07,
        "vega": 0.4277,
        "volume": 8064
      },
      {
        "ask": 4.0,
        "bid": 3.98,
        "delta": -0.514,
        "epsilon": -0.0724,
        "expiration": "2026-08-21",
        "gamma": 0.0462,
        "implied_vol": 0.0877,
        "open_interest": 2999,
        "rho": -0.0771,
        "right": "P",
        "strike": 777,
        "theta": -0.2877,
        "underlying_price": 776.07,
        "vega": 0.427,
        "volume": 8247
      }
    ],
    "ticker": "SPY",
    "time_of_day": "EOD",
    "trade_date": "2026-08-14",
    "underlying_price": 776.07
  }
}

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.

NameInDefaultRangeMeaning
ticker requiredpathany covered symbolThe underlying, upper case. Use /search to check coverage.
expiration requiredqueryYYYY-MM-DDThe expiration to fetch.
trade_date requiredqueryYYYY-MM-DD, a past trading dayThe day whose close to use.

Field by field

What each
number means.

calls[], puts[]
One row per strike per side.
strike, bid, ask, implied_vol
The quote and IV that day.
delta, gamma, theta, vega, rho
Greeks at the close.
underlying_price, trade_date, time_of_day
Context.

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 get_historical_chain by name. One URL, a sign-in, no token to paste.

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

Show the SPY chain for 21 August as it was priced on 14 August.

You

What was the IV of the NVDA 200 call on the day before earnings?

You

Pull the AAPL chain snapshot from last Friday.

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

Next

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

Options chain APIEvery strike, calls and puts side by side, with quotes, per-contract IV, the Greeks, volume and open interest already on the row. Live today, or as it was priced on any past trading day. How to Read an Options Chain: Full GuideHow to read an options chain: calls, puts, strikes, bid-ask, volume, open interest and implied volatility explained, with a worked example. get_historical_chain in an MCP clientPrompts for Claude, Cursor and ChatGPT that call this tool.

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