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FAQ

1: What is an API?​

A: API stands for Application Programming Interface. Through APIs, clients can connect their own systems with Webull’s main system to perform actions such as getting quotes, inquiries, and automated trading.

2. Why am I receiving an HTTP 403 Error (Forbidden)?​

A 403 error will be returned by the market data interface if any of the following conditions are met:

  • The request does not contain authentication information.
  • The authentication credentials are invalid.
  • The user does not have sufficient permissions.

For more details, please refer to:
User Authentication Process Authentication.

Note

Due to security and regulatory requirements in Hong Kong, in addition to authentication via the App Key and Secret signature, OpenAPI also requires Token authentication.
For details on Token creation and verification, please refer to Token Creation and Verification.

3: Do we need to worry about generating signatures when using the Webull SDK?​

A: No, the Webull SDK already encapsulates signature generation. No extra effort is needed.

Q4: How long does API application approval take?​

A: The review and approval process for the API application is typically completed within 1 to 2 business days.

Q5: What are the fees?​

A: There are currently no additional charges for trading via Webull OpenAPI. Trading fees are the same as those in the APP. Please refer to the following for the specific fee schedule:

Webull HK/China Trading Fees Overview - Webull

Q6: Do we need to worry about generating signatures when using the Webull SDK?​

A: No, the Webull SDK already encapsulates signature generation. No extra effort is needed.

Q7: Why do I need an App Key and App Secret?​

A: The App Key and App Secret are unique application-level identifiers assigned to developers. Only users with a valid App Key and App Secret can make requests and interact with the API.

Q8: Is A-share trading supported?​

A: Only a subset of A-shares can be traded via Stock Connect. For details, see the Stock Connect Eligible Securities List.

Note

Webull OpenAPI currently does not support A-share trading for Mainland China clients.