NOTICE DATE: June 18, 2026

NOTICE TYPE: R-B052926-02 Outage - Retail

SHORT DESCRIPTION: Implementation of ERCOT Project PR533_01 MarkeTrak Tech Refresh API Re-Write

INTENDED AUDIENCE: TDSPs, LSEs

DAYS AFFECTED: Sunday, June 28, 2026, 08:00 through 23:59

LONG DESCRIPTION: ERCOT will be implementing changes associated with ERCOT Project PR533_01 (MarkeTrak Tech Refresh API Re-Write) in the ERCOT production environment on Sunday, June 28, 2026.

ADDITIONAL INFORMATION: 

• MarkeTrak will be unavailable for the duration of the outage.
• API users will need to implement a new XSD and WSDL which will be available at  https://www.ercot.com/services/client_svcs/mktrk_info/index.html   -MarkeTrakAPI_rc6_v1_PROD_Effective_08-28-2026 link.
• The API URL has not changed. API users should continue to use https://misapi.ercot.com/marketrakAPI/.

CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at ClientServices@ercot.com.

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dg