Index constituents

Overview

index-constituents returns one row per member security of an index, with the weight it carries. It is a derived surface: the membership comes from the official index definition and the weights are computed from official market data, so a constituent list is reproducible rather than opaque. Each row carries lineage back to those inputs.

Coverage

Example response

TODO — no real response has been captured for this dataset yet. It needs an entitled API key, or its required parameters are not yet known. Rather than show an example nobody has observed, this section stays empty.

Getting started

1. Put your key in the X-API-Key header.
2. Add query parameters (symbol, date range, limit).
3. Send the request and read the returned payload.

curl "https://api.twmarketdata.com/v2/datasets/index-constituents?symbol=2330" \  -H "X-API-Key: sk_live_..."

Filtering

Python

A first call:

import requests resp = requests.get(    "https://api.twmarketdata.com/v2/datasets/index-constituents",    params={"symbol": "2330"},    headers={"X-API-Key": "sk_live_..."},)resp.raise_for_status()print(resp.json())

With a date-range filter:

import requests # The full verified example — the same call with every supported filter set.resp = requests.get(    "https://api.twmarketdata.com/v2/datasets/index-constituents",    params={"symbol": "2330"},    headers={"X-API-Key": "sk_live_..."},)resp.raise_for_status()print(resp.json())

OpenAPI

This endpoint is GET /v2/datasets/index-constituents. The full machine-readable schema (parameters, security, response envelope) lives in the OpenAPI spec.

Notes & limitations

• For this dataset the symbol param is an index code (e.g. IX0001), which selects the index whose constituents you want. Weights are derived and change with prices — pin as_of to reproduce a membership snapshot.