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NOTICE DATE: April 26, 2019

NOTICE TYPE: M-B032819-04 Operations

SHORT DESCRIPTION: Reminder - ERCOT Secure Sockets Layer (SSL) certificate upgrade and changes to programmatic access to ERCOT's External Web Services API

INTENDED AUDIENCE: Market Participant personnel that administer programmatic access to ERCOT’s production and testing environments and User Security Administrators (USAs)

DAYS AFFECTED: May 1, 2019

LONG DESCRIPTION: This Market Notice is a reminder that on May 1, 2019 at 1:00 PM CDT, Market Participants will be required to use the new DigiCert SSL Intermediate and Root CA configuration for all programmatic access to ERCOT’s Production External Web Services API (MISAPI.ERCOT.COM and API.WAN.ERCOT.COM).

ACTION REQUIRED:  The following certificates are the minimum required for the new DigiCert SSL Intermediate and Root CA configuration to communicate with the ERCOT External Web Services API for submissions, queries, and report downloads.

Market Participants should either add these certificates to the existing keystore or create a blank keystore with just these certificates installed after the new DigiCert SSL Intermediate and Root CA configuration changes to production on May 1, 2019. The entire SSL Chain will be required for the production environment for API communication. The Client Root Certificate is also required.

         Required SSL Chain Certificates:

o   Production

·         DigiCertGlobalIntermediateG2.cer (DigiCert Global Intermediate G2 SSL Certificate)

·         DigiCertGlobalRootCAG2.cer (DigiCert Global Root CA G2 SSL Certificate)


·         Required Client Root Certificate:

o   Production

·         ERCOT_CA.cer (ERCOT’s Production 2048 Client Root Certificate)


·         Required API Public Key:

o   Production

·         misapi.cer (ERCOT's New Production EWS and MarkeTrak API Public Key)

ADDITIONAL INFORMATION:  All Certificates are available for download on the Digital Certificate Security Information page of ERCOT.com.

Please review the ERCOT website for previous Market Notices related to this subject.

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 [log in to unmask].

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