China market data / Indices
INDICES API

China Stock Index Data API

Connect index performance, constituents and weights directly to backtests, portfolio attribution and benchmark research.

Create a free API key View endpoint documentation
01

Core coverage

Retrieve historical prices for major China indices

02

Research use

Query index constituents and current weights

03

Extended capability

Calculate benchmark returns, exposure and attribution

REST API

Start querying with one request

Every endpoint uses consistent authentication, security symbols, and JSON responses. The same API key works with Python SDK, MCP, and REST API.

curl "https://quantsonar.com/v1/indices/daily?symbol=000300.SH&start_date=20260101" \
  -H "X-API-Key: qs_your_key"
AVAILABLE DATA

Indices endpoints

FREEIndex daily bars (default SSE Composite)/v1/indices/daily PROIndex constituents & weights/v1/indices/index-weight
EXPLORE THE DATA ATLAS

Combine more research data

Explore prices, ETFs, financials, flows, indices, and realtime information, then combine results through consistent public fields. Review pricing and rate limits before choosing a plan.

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