/isUserNameAvailable

https://[domain]/ws/eca/isUserNameAvailable

Service to see if a user_name is available.
Only applicable for advisors/brokers specifying user_name in the application to create an account.
HTTP Request Type: POST

Request Parameters

Name	Value	Description	Usage
CSID	Client Service ID	Unique identifier issued by Interactive Brokers.	Required
userName	Alphanumeric Begin with a letter Contains at least 3 letters and 3 numbers Minimum of 8 letters and numbers. Maximum of 9 letters and numbers. Lower case only, no spaces, no special characters.	Desired user_name for the applicant.	Required

IBKR User Guides is affiliated with Interactive Brokers LLC

Interactive Brokers LLC
Is a member NYSE - FINRA - SIPC and regulated by the US Securities and Exchange Commission and the Commodity Futures Trading Commission.
Headquarters: Two Pickwick Plaza, Greenwich, CT 06830, USA
Website: www.interactivebrokers.com

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/isUserNameAvailable

JSON Request

Sample