NOTICE DATE: September 27, 2022
NOTICE TYPE: M-A062822-03 General
SHORT DESCRIPTION: ERCOT TLS1.0 and TLS1.1 protocol deprecation on ERCOT’s External Web Services API
INTENDED AUDIENCE: Market Participant personnel who administer programmatic access to ERCOT’s production and test environments and User Security Administrators (USAs)
DAYS AFFECTED: October 26, 2022, and November 30, 2022
LONG DESCRIPTION: Due to changes in security industry standards, ERCOT is deprecating the TLS1.0 and TLS1.1 protocols used for programmatic access to ERCOT’s Production External Web Services API (MISAPI.ERCOT.COM and API.WAN.ERCOT.COM).
On October 26, 2022, ERCOT’s MOTE and RMTE environment will be updated to only allow the TLS1.2 protocol for all programmatic access. ERCOT is making these changes available to the test environments to ensure that Market Participants have adequate time to test this new configuration.
On November 30, 2022, ERCOT will update the Production External Web Services APIs to only allow the TLS1.2 protocol for all programmatic access.
ERCOT’s MOTE and RMTE can be accessed through the following URLs.
Note that this effort causes no impacts to Market Participants who access the Market Information System (MIS) or other ERCOT websites through a web browser.
ACTION REQUIRED: Market Participant personnel who administer programmatic access to ERCOT’s production and test environments will need to ensure that only the TLS1.2 protocol is used for connectivity to ERCOT. ERCOT encourages Market Participants to adopt these changes prior to the dates listed as ERCOT already supports the TLS1.2 protocol. Failure to make the required changes on the Market Participant side can cause connection errors and will prevent access to ERCOT’s External Web Services APIs.
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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