aid: westar-energy
name: Westar Energy
url: https://raw.githubusercontent.com/api-evangelist/westar-energy/refs/heads/main/apis.yml
modified: '2026-05-03'
description: >-
  Westar Energy was the largest electric utility in Kansas, providing electric
  service to homes, businesses, and industries throughout Kansas before merging
  with Great Plains Energy in 2018 to form Evergy, Inc. As Evergy, the company
  continues to serve approximately 1.6 million customers in Kansas and Missouri
  with a focus on grid modernization, smart metering (AMI) through its
  Gridstream Connect IoT platform, and clean energy transformation including
  wind power and demand response programs.
tags:
  - Electric Utility
  - Energy
  - Smart Grid
  - Kansas
  - AMI
  - Evergy
  - Utilities
  - Fortune 1000
created: '2026-03-24'
specificationVersion: '0.19'
apis: []
common:
  - type: DomainSecurity
    url: security/westar-energy-domain-security.yml
  - type: LinkedIn
    url: https://www.linkedin.com/company/westar-energy
  - type: Website
    url: https://www.evergy.com/
    title: Evergy (formerly Westar Energy)
  - type: Portal
    url: https://www.evergy.com/manage-account/my-account
    title: My Account Portal
  - type: Documentation
    url: https://www.evergy.com/
  - type: Features
    data:
      - name: Smart Metering (AMI)
        description: >-
          Advanced Metering Infrastructure with Gridstream Connect IoT platform
          providing near real-time electricity usage data, outage detection,
          and remote meter reading for 1.6 million customers.
      - name: Energy Usage Data Access
        description: >-
          Customer-facing energy usage analytics and comparison tools enabling
          visibility into historical consumption, billing trends, and
          efficiency benchmarking.
      - name: Time-of-Use Rates
        description: >-
          Smart meter-enabled time-of-use and demand-based rate programs
          providing price signals and automated demand response capabilities.
      - name: Green Button Data
        description: >-
          Standardized NAESB ESPI energy usage data download capability
          allowing customers and third parties to access electricity
          consumption data in Green Button format.
      - name: Grid Modernization
        description: >-
          Distribution automation, substation digitization, high-voltage
          transmission upgrades, and distribution system modernization
          enabling smart grid operations and clean energy integration.
      - name: Rooftop Solar Integration
        description: >-
          Net metering programs and interconnection services for distributed
          energy resources including rooftop solar and battery storage systems.
  - type: UseCases
    data:
      - name: Energy Usage Monitoring
        description: >-
          Access granular electricity consumption data for homes and businesses
          to identify energy waste and optimize usage patterns.
      - name: Demand Response
        description: >-
          Participate in utility demand response programs through smart
          thermostat and device control integrations using time-of-use pricing.
      - name: Solar and DER Integration
        description: >-
          Connect distributed energy resources including rooftop solar and
          battery systems to the grid through standardized interconnection
          and net metering programs.
      - name: Business Energy Management
        description: >-
          Access interval meter data for commercial and industrial customers
          to support energy management systems, sustainability reporting,
          and operational efficiency programs.
  - type: Integrations
    data:
      - name: Landis+Gyr AMI
        description: >-
          13-year contract for Gridstream Connect smart meter network management,
          software hosting, and field maintenance for AMI infrastructure.
      - name: Green Button Alliance
        description: >-
          Energy usage data standard compliance enabling customers to share
          electricity data with authorized third-party apps and services
          through standardized NAESB ESPI REST APIs.
      - name: Smart Thermostat Programs
        description: >-
          Integration with smart home devices and thermostats for demand
          response and energy efficiency programs.
  - type: Integrations
    url: https://www.evergy.com/integrations
integrations:
  - name: Google Play store button
  - name: Apple app store button
  - name: Facebook
  - name: Twitter
  - name: YouTube
  - name: LinkedIn
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com