Change Logs

2026-06-13

Signature document update.

Gainers & Losers API returns update.

Top Active Screener endpoint has been renamed.

Changed

Category	API	Change	Link
Docs	—	Signature document content updated by part format.	Signature
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 & Broker API: Stock Instrument endpoints added margin requirement ratio 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
API	Broker API	Broker 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

2026-05-30

Broker API account opening capabilities significantly expanded. New endpoints added across Authentication and Market Data API

New

Category	API	Change	Link
API	Authentication	Added Client-To-Server authentication flow with two new endpoints: Create Client Token and Refresh Client Token	Create Client Token · Refresh Client Token
API	Market Data API	Added Display Solution tier under Market Data API, including Stock Screener (Top Active, Top Gainers/Losers), Stock Quotes (Snapshot, Historical Bars, Tick, Quotes Depth, Historical Bars single symbol), Corporate Actions (By Market, Detail), Stock Instrument (Get Instruments, Batch Get Logos, Company Profile, Analyst Target Price, Analyst Rating), Event Contract market data (Instrument: Sports Filter, Series List, Milestones, Event List, All Tags; Quotes: Snapshot, Depth, Bars by Symbols, Bars by Event, Live Data, Game Stats), and Streaming (Subscribe, Unsubscribe)	Display Solution
API	Market Data API	Added Option market data endpoints under Non-Display Solution: Option Tick, Option Snapshot, Option Historical Bars	Option Tick · Option Snapshot · Option Historical Bars
API	Broker API – Accounts	Added Retrieve Account List endpoint (GET /accounts)	Retrieve Account List

Changed

Category	API	Change	Link
API	Broker API – Accounts	Create an Account: now supports submitting Basic Form + Brokerage Form + EC Form simultaneously to open both a Brokerage account and an EC account in a single request	Create an Account
API	Broker API – Accounts	Create an Account: supports opening a Brokerage or EC account first, then appending additional account types by passing related_account_id + additional form in a subsequent New Account request	Create an Account
API	Broker API – Accounts	Create an Account (EC additional form) and Update an Account: added new optional field is_bp_shared (boolean)	Create an Account · Update an Account

2026-05-16

Trading API order events now include order_id. New MCP tools and Skills endpoints added. Broker API agreement types expanded. Order quantity precision updated.

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	Subscribe Trade Events: response now includes order_id field	Subscribe Trade Events
API	Trading API	Order History, Open Order, Order Detail: response fields total_quantity and filled_quantity precision updated to 5 decimal places	Order History · Open Order · Order Detail
API	Broker API	Get Form Content: added three new mandatory agreement types for account opening — DAY_TRADING_RISK_DISCLOSURE, EXTENDED_HOURS_TRADING_DISCLOSURE, LOW_PRICED_SECURITIES_ALERT	Get Form Content
Docs	—	SDK page updated with Broker API host information	SDKs and Tools

2026-04-04

AI assistants can now access Webull trading and market data via Model Context Protocol (MCP).

New

Category	Change	Link
Docs	Added Webull MCP Server documentation — step-by-step setup guide for connecting AI assistants to Webull OpenAPI via Model Context Protocol, including architecture overview, prerequisites, client configuration, authentication flow, available endpoints, and security recommendations	Webull MCP Server

2026-03-28

Event contracts now support real-time market data streaming.

Order Place endpoint: added position_intent field for options orders.

Changed

Category	Change	Link
Docs	Event contracts now support quote, snapshot, and tick data subscription in the Data Streaming API	Data Streaming API
API	Order Place endpoint added position_intent field for options orders. Supported values: BUY_TO_OPEN, BUY_TO_CLOSE, SELL_TO_OPEN, SELL_TO_CLOSE. For combo orders, it can only be set on the MASTER order.	Order Place

2026-03-14

API Reference

Market Data API

• Added two new endpoints to the event market module:
  • Event Bars
  • Event Tick

Trading API

• Added two new endpoints to the Instrument module:

  • Get Event Contract Categories
  • Get Event Contract Events

• Updated Get Event Contract Series:

  • Request: Renamed parameter last_instrument_id to last_series_id; added symbols parameter.
  • Response: Renamed field instrument_id to series_id.

• Updated Get Event Contract Instrument:

  • Request: Added event_symbol, symbols, and expiration_date_after parameters.
  • Response: Added event_symbol and event_name fields.

2026-03-07

API Reference

Fractional Event Contract New Feature Support

• Trading Module : Now supports order placement for fractional event contracts
• Get Event Contract Instrument Endpoint: Added dedicated fields for fractional event contract support and price range parameters of event contracts
  • fractionable: Boolean field indicating whether the event contract instrument supports fractional trading
  • priceRanges: Field defining the price range parameters for the event contract instrument

2026-01-31

Documentation

• Added the Event Trading documentation to the Trading API module.

API Reference

Market Data API

• Added two new interfaces, Event Snapshot and Event Depth, to the event market module.

Trading API

• Enhanced the interface capabilities of the Trading module, including support for event contracts and the addition of algorithmic order trading functionality (TWAP, VWAP, POV).

2026-01-17

Documentation

• Added About Connect API documentation under the Connect API module, providing an overview of the Connect API framework, its purpose, and core capabilities.

• Added Authorization and Trading in Connect API documentation under the Connect API module, detailing the end-to-end authorization flow and how trading operations are performed using Connect API.

API Reference

Market Data API

• Added a new endpoint: Footprint Connect API

• Added Get An Authorization Code API documentation, describing how to obtain an authorization code as part of the OAuth authorization process.

• Added Create And Refresh Token API documentation, covering access token creation and token refresh mechanisms.

2026-01-12

API Reference Updates

Market Data API

• RESTful API

  • Updated the response format for market data snapshots: For the latest response schema, see: Snapshot

• Data Streaming

  • Enhanced the fields included in market data snapshot streaming.
    For the latest payload definition, see: Snapshot

Trading API

• Orders
  • Added a new endpoint: Order Batch Place

2025-12-13

Now supporting futures and crypto trading!

1. Documentation

• Added futures, crypto documents and code examples

2. API Reference

• Description:

  • Market Data: Added futures and crypto market data interface. Supports market snapshot, historical bars, data etc.
  • Trading: Building on our existing trading APIs, we have launched a more powerful suite of trading interfaces (covering order estimate, place, replace, and cancel). Now, a single order place API enables trading across stocks, options, futures, and crypto.
  • Accounts & Assets: Now supporting futures and cryptocurrency accounts and assets.

• Interface:

  • Market Data API:
    • Futures: Tick, snapshot,depth of book,historical bars
    • Crypto: snapshot,historical bars
  • Trading API:
    • Accounts: Account List
    • Assets: Account Balance, Account Positions
    • Orders:
      • Futures: Order Preview, Order Place, Order Replace, Order Cancel
      • Crypto: Order Place, Order Cancel

2025-11-29

Documentation

• Added code examples for the Assets, Accounts, and Orders modules in the documentation.
• Fixed broken links in the documentation.

2025-11-20

Documentation Initialization

Core Description

• Create the Webull official Open API documentation for the first time to provide developers with complete interface integration specifications, usage guides, and technical references.
• Document Purpose: For developers to integrate with Webull Open API and query interface details
• Document Structure: Divided into three core modules: "Documentation", "API Reference", and "Recipes"

Coverage

1. Documentation

• Description: Welcome、About Webull、About Webull OpenAPI
• Development Tools: SDKs and Tools、Additional Resources
• Core Modules:
  • Authentication: Overview 、Individual Application Process、Signature、Token
  • Market Data API: Overview、Getting Started、Data API、Data Streaming API、FAQ
  • Trading API: Overview、Getting Started、Account API、Trading API、Trading Events、FAQ
  • Connect API: Under construction
  • Broker API: Under construction
• Supplementary Content: Q&A

2. API Reference

• Description: Webull Open API Reference
• Authentication:
  • Document: Token
  • interface: Create Token（POST）、Check Token（POST）
• Market Data API:
  • Document: Getting Started
  • Stock:
    • Basic interface: Tick（GET）、Snapshot（GET）、Quotes（GET）、Historical Bars（POST）、Historical Bars (single symbol)（GET）
    • Streaming Interface: Subscribe（POST）、Unsubscribe（POST）
• Trading API:
  • Document: Getting Started
  • Utility interface: Instrument（GET）
  • Account interface: Account List（GET）、Account Balance（GET）、Account Positions（GET）
  • Order interface:
    • Stock order: Preview Order（POST）、Place Order（POST）、Replace Order（POST）、Cancel Order（POST）
    • Option order: Preview Options（POST）、Place Options（POST）、Modify Options（POST）、Cancel Options（POST）
    • Order Query: Order History（GET）、Open Order（GET）、Order Detail（GET）
  • Trade Events: Subscribe Trade Events

3. Recipes

• Signature Generation
• Create and verify token
• Place your first order