Errors

Error bodies are JSON:

{
  "error": {
    "code": "INVALID_SYMBOL",
    "message": "Symbol '600519' is ambiguous. Use 600519.SH."
  }
}

Error codes

HTTP	code	Description
400	INVALID_SYMBOL	Malformed or unsupported symbol
400	INVALID_PARAMETER	Invalid parameter (e.g. from > to)
400	UNSUPPORTED_INTERVAL	Only 1/day is supported in v1
401	UNAUTHORIZED	Invalid, missing, or revoked API key
402	INSUFFICIENT_CREDITS	Insufficient credits
403	PLAN_LIMIT	Plan limit exceeded (history, limit, symbol count)
200	—	Valid symbol but no bars in range: ohlc: [], resultsCount: 0
500	INTERNAL_ERROR	Server error

For a valid symbol with no trading-day bars in the range, the API returns HTTP 200 with an empty ohlc array—not 404.

Symbol format

Use 600519.SH, 000001.SZ, or 430017.BJ. See REST Overview · Conventions.