Change Logs

2026-10-31

Trading API Cancel/Replace order interfaces clarified that only API-placed orders are supported. Market data interfaces added maximum query range notes; List Option Historical Bars added start_time/end_time parameters; List Option Ticks count parameter changed to optional.

Changed

Category	API	Change	Link
API	Trading API	Cancel Order and Replace Order interface descriptions now note that only orders placed via API are supported.	Replace Order Cancel Order
API	Stock Market Data	List Stock Historical Bars and List Stock Footprints interfaces added maximum query range notes (up to 180 days for minute bars / footprints, up to 5 years for daily bars).	List Stock Historical Bars List Stock Footprints
API	Option Market Data	List Option Historical Bars interface added maximum query range note and new start_time/end_time query parameters; List Option Ticks count parameter changed from required to optional.	List Option Historical Bars List Option Ticks

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

2026-10-16

Trading API documentation updated for multi-leg option orders.

Changed

Category	API	Change	Link
Docs	—	Options Trading now covers multi-leg strategies: the Supported Strategies table lists all option_strategy values; order parameters add leg_in_or_out, position_id and legs; added multi-leg request examples (Vertical, Straddle, Iron Condor) and new "Leg In / Leg Out" and "Modifying Multi-Leg Orders" sections.	Options Trading
Docs	—	Supported Products, Feature Matrix (new "US Multi-Leg Options" column and "Leg In / Leg Out" row) and endpoint descriptions updated for multi-leg option orders.	Trading API Overview
Docs	—	Added a note on multi-leg option positions (option_strategy, legs) and on using position_id for Leg In / Leg Out.	Accounts
Docs	—	Added FAQs on how the actual strategy is determined, modifying multi-leg orders, and closing a single leg of a multi-leg position.	Trading API FAQ

2026-10-11

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

New

Category	API	Change	Link
API	Trading API	Place Order & Preview Order now support multi-leg option orders. option_strategy adds COVERED_STOCK, STRADDLE, STRANGLE, VERTICAL, CALENDAR, BUTTERFLY, CONDOR, COLLAR_WITH_STOCK, IRON_BUTTERFLY, IRON_CONDOR and DIAGONAL. This field is for reference only; the system determines the actual strategy from the composition of legs. Added a "Multi Leg Order" request example (Vertical spread).	Place Order Preview Order
API	Trading API	Place Order & Preview Order added leg_in_or_out (LEG_IN / LEG_OUT) and position_id parameters for legging into an existing position or legging out of a multi-leg strategy position. position_id is obtained from the Account Positions API and is required when leg_in_or_out is specified.	Place Order Preview Order
API	Trading API	Replace Order added legs parameter (each item: id, quantity). Required for multi-leg option orders and must contain every leg of the order. The strategy structure cannot be changed by a replace request; to add/remove legs or change strike price, expiration date or side, cancel the order and place a new one.	Replace Order

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

2026-08-22

Optimized API endpoint descriptions and paths.

Changed

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

2026-08-08

Subscribe Position Events and Get Stock Instruments update.

Changed

Category	API	Change	Link
API	Trading API	Support single-leg option message push.	Subscribe Position Events
API	Trading API	Add sub_category fields to the request and responses	Get Stock Instruments
Docs	—	Add relevant content on single-leg options	Trading API Overview

2026-07-25

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

2026-07-13

AI-Friendly Resources: Added Webull Cloud MCP Server documentation.

New

Category	API	Change	Link
Docs	—	Added Webull Cloud MCP Server quickstart documentation under AI-Friendly Resources	Webull Cloud MCP Server

2026-07-10

AI-Friendly Resources: Added Webull CLI documentation.

New

Category	API	Change	Link
Docs	—	Added Webull CLI quickstart documentation under AI-Friendly Resources	CLI

2026-06-27

Market Data API: Added Fundamentals module with 22 new endpoints and 4 new Screener endpoints.

Trading API: Company Profile, Analyst Target Price and Analyst Rating moved to Market Data API > Fundamentals.

New

Category	API	Change	Link
API	Market Data API	Added Fundamentals category with 22 endpoints: Company Profile, Analyst Target Price, Analyst Rating, 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	Fundamentals
API	Market Data API	Added 4 new endpoints to Screener: Market Sectors — Get market sector list Market Sectors Detail — Get sector constituent stocks High Dividend Rank — Get high dividend stocks ranking 52 Week High/Low — Get 52 week high/low stocks	Market Sectors · Market Sectors Detail · High Dividend Rank · 52 Week High/Low

Changed

Category	API	Change	Link
API	Trading API	Instrument module: Company Profile, Analyst Target Price, and Analyst Rating moved to Market Data API > Fundamentals	Fundamentals

2026-06-13

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

Gainers & Losers API returns update.

Top Active Screener endpoint has been renamed.

Changed

Category	API	Change	Link
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
API	Market Data API	Gainers & Losers endpoint response added relative_volume_10d field.	Gainers & Losers
API	Market Data API	Screener endpoint name and URL changed from most-active to top-active.	Top Active

2026-06-06

Trading API: Get Stock Instrument response now returns four additional margin fields.

Changed

Category	API	Change	Link
API	Trading API	Get Stock Instrument response now returns four additional margin fields: intraday_margin_long — Intraday margin requirement ratio for long position intraday_margin_short — Intraday margin requirement ratio for short position maintenance_margin_long — Maintenance margin requirement ratio for long position maintenance_margin_short — Maintenance margin requirement ratio for short position	Get Stock Instrument

2026-05-23

Upgraded signature algorithm from HMAC-SHA1 to HMAC-SHA256 for enhanced security.

Changed

Category	API	Change	Link
Authentication	All APIs	The request signature algorithm has been upgraded from HMAC-SHA1 to HMAC-SHA256.	Signature

2026-05-16

New MCP tools and Skills endpoints added. Fixed incorrect field values returned by the screener ranking API.

New

Category	API	Change	Link
MCP	Market Data API	Added new MCP tools: get_stock_noii_bars, get_stock_noii_snapshot, get_gainers_losers, get_most_active	MCP
MCP	Trading API	Added new MCP tools: get_futures_instruments, get_futures_products, get_futures_product_class, get_company_profile, get_analyst_rating, get_analyst_target_price, get_watchlists, create_watchlist, update_watchlist, delete_watchlist, get_watchlist_instruments, add_watchlist_instruments, remove_watchlist_instruments, update_watchlist_instruments	MCP
Skills	Market Data API	Added new Skills endpoints: stock-noii-bars, stock-noii-snapshot, stock-gainers-losers, stock-most-active	Skills
Skills	Trading API	Added new Skills endpoints: instrument-company-profile, instrument-analyst-rating, instrument-analyst-target-price, instrument-futures-product-class, instrument-futures-products, instrument-futures-list, watchlist-list, watchlist-create, watchlist-delete, watchlist-update, watchlist-instruments-list, watchlist-instruments-add, watchlist-instruments-remove, watchlist-instruments-update	Skills

Changed

Category	API	Change	Link
API	Trading API	Fixed incorrect field values returned by the screener ranking endpoints	Trading API