Core coverage
Retrieve historical prices for major China indices
Research use
Query index constituents and current weights
Extended capability
Calculate benchmark returns, exposure and attribution
REST API
One request into your workflow
Every endpoint uses consistent authentication, security symbols and JSON responses, with Python SDK, MCP and Skills access available.
curl "https://quantsonar.com/v1/indices/daily?symbol=000300.SH&start_date=20260101" \ -H "X-API-Key: qs_your_key"