What it returns
Constituents of the S&P 500, S&P MidCap 400 and S&P SmallCap 600, plus every dated add and drop, in clean JSON.
Constituents**: symbol, company, GICS sector and sub-industry, headquarters, date added (S&P 500), CIK. Changes**: effective date, added and removed symbol and name, and the reason (for example market-cap change or acquisition). Point-in-time membership**: set `asOf` to rebuild the index as it stood on any past date, which removes survivorship bias from backtests.
Request
POST https://api.pushbuild.com/sp-index-membership/run with a JSON body. Send your key in the X-API-Key header.
| Field | Type | Description |
|---|---|---|
dataset | string: constituents, changes | What to return. Default: "constituents". |
indexes | list of strings | S&P 500, S&P MidCap 400, S&P SmallCap 600. Default: ["sp500"]. |
asOf | string | YYYY-MM-DD. Constituents only. Leave empty for today. |
symbols | list of strings | Only these tickers (added or removed, for changes). |
dateFrom | string | YYYY-MM-DD. Changes only. |
dateTo | string | YYYY-MM-DD. Changes only. |
maxItems | integer | Maximum items to return (1-500). Default: 100. |
Example
curl -X POST https://api.pushbuild.com/sp-index-membership/run \
-H "X-API-Key: YOUR_KEY" \
-H "Content-Type: application/json" \
-d '{"maxItems": 20}'Response
{"count": 20, "truncated": false, "seconds": 1.4, "items": [ { ... } ]}Each call returns up to 500 items. Records that fail validation or are not found are flagged in the items and not charged.
Pricing
Pay only for results returned: $0.16 per 1,000 rows. No charge for errors or empty searches.
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