NOTICE DATE: June 30, 2026

NOTICE TYPE: M-C063026-01 General

SHORT DESCRIPTION: ERCOT's PROD Notification Listeners certificate renewal

INTENDED AUDIENCE: Market Participant personnel that receive notifications from ERCOT's External Web Services on their Listeners in the PROD environment

DAYS AFFECTED: July 7, 2026

LONG DESCRIPTION: On July 7, 2026, ERCOT will replace the Notifications Public Key SSL certificate used by the Listeners that receive notifications from the External Web Services (EWS) with a new Notifications Public Key Secure Sockets Layer (SSL) certificate.

Impacts will only include those Market Participants that receive notifications on their Listeners and validating the request and certificate in the PROD environment.

ACTION REQUIRED: Market Participants must download and install the following into their application's key store:

ERCOT Notifications Public Key (Valid from 06/09/2026 to 12/25/2026)

All Certificates, including the updated public key, are available for download on ERCOT.com at http://www.ercot.com/services/mdt/webservices/.

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.

If you are receiving email from a public ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com.

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