SUPPORT
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First examine the API's tags to determine the appropriate API support team. For example:

OR
Login to API Marketplace to open a support request
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  • 888-382-2721 (U.S. Toll Free)
  • 212-855-8099 (International)

Select the call option corresponding to the desired API support team.

"Welcome to the DTCC Client Support Line. Your call may be monitored for quality assurance purposes."