Change Logs

2026-10-17

Market Data API Option historical bars endpoint added start_time and end_time parameters.

Changed

Category	API	Change	Link
API	Market Data API	Option historical bars endpoint added start_time and end_time query parameters, allowing historical bars to be fetched by time range.	List Option Historical Bars

2026-09-20

Interface version header x-version updated from v2 to v3 across the Authentication documents.

Changed

Category	API	Change	Link
Docs	—	x-version request header updated from v2 to v3 in the required headers table.	Authentication Overview
Docs	—	x-version request header updated from v2 to v3 in the required headers table and in the Python/Java signature examples; the example endpoint used throughout was updated from GET /openapi/account/list to GET /trading/accounts/list.	Signature
Docs	—	x-version updated from v2 to v3 in the request header example.	Token

2026-09-12

Market Data API: Expanded the Screeners and Fundamentals modules with additional endpoints.

New

Category	API	Change	Link
API	Market Data API	Added 4 Screeners endpoints: Market Sectors, Market Sectors Detail, High Dividend Rank, and 52 Week High/Low.	Market Sectors Market Sectors Detail High Dividend Rank 52 Week High/Low
API	Market Data API	Added 20 Fundamentals endpoints: Forecast EPS, Filings, Earnings Calendar, Dividend Calendar, Capital Flow, Industry Comparison, Indicators, Income, Cashflow, Balancesheet, Alert, Fund Brief, Fund Performance, Fund NetValue, Fund Holdings, Fund Dividends, Fund Rating, Fund Splits, Fund Files, and Fund Allocation.	Forecast EPS Filings Earnings Calendar Dividend Calendar Capital Flow Industry Comparison Indicators Income Cashflow Balancesheet Alert Fund Brief Fund Performance Fund NetValue Fund Holdings Fund Dividends Fund Rating Fund Splits Fund Files Fund Allocation

2026-08-29

Trading API: Added single-leg option order support for US Market.

New

Category	API	Change	Link
API	Trading API	Added single-leg option order capability to the Place Order endpoint. Users can now submit single-leg option orders (Buy/Sell) through the existing order placement interface.	Order Place

2026-08-22

Optimized API endpoint descriptions and paths.

Changed

Category	API	Change
API	Trading API	Optimized API endpoint descriptions and paths for clarity and consistency.

2026-08-14

Subscribe Trade Events documentation update.

Changed

Category	API	Change	Link
API	Trading API	Subscribe Trade Events: MODIFY_SUCCESS example order_status value changed from WORKING to SUBMITTED.	Subscribe Trade Events

2026-06-27

Market Data API: Added Screener, Watchlist, and Fundamentals modules.

New

Category	API	Change	Link
API	Market Data API	Added Screener category with 2 endpoints: Stock Top Gainers/Losers Rank, Top Active	Screener
API	Market Data API	Added Watchlist category with 8 endpoints: Get Watchlist, Create Watchlist, Update Watchlist, Delete Watchlist, Get Watchlist Instruments, Add Instruments to Watchlist, Remove Instruments from Watchlist, Update Instruments Sort Order	Watchlist
API	Market Data API	Added Fundamentals category with 3 endpoints: Company Profile, Analyst Target Price, Analyst Rating	Fundamentals

2026-06-20

Add new document In the AI Friendly Resources.

Add

Category	API	Change	Link
Docs	—	Add the documents "Webull MCP Server" in the "AI Friendly Resources" module.	Webull MCP Server
Docs	—	Add the documents "Webull Agent Skills" in the "AI Friendly Resources" module.	Webull Agent Skills

2026-06-13

Signature document update.

Historical Bars API now supports additional bar intervals, including intraday, daily, weekly, monthly, and yearly timeframes.

Changed

Category	API	Change	Link
Docs	—	Signature document content updated by part format.	Signature
API	Market Data API	Historical Bars endpoint updated timespan.schema.enum to support additional values: M15, M30, M60, M120, M240, D, W, M, Y.	Historical Bars