# IESO Retrofit System API

**Canonical:** https://apis.io/apis/ieso/ieso-retrofit-api/  
**Provider:** IESO — https://apis.io/providers/ieso/  
**Base URL:** https://online.ieso.ca/suite/webapi  
**Documentation:** https://www.ieso.ca/sector-participants/technical-interfaces

IESO Retrofit System API is one of 9 APIs that [IESO](https://apis.io/providers/ieso/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Energy Efficiency, Demand Response, Retrofit, and REST. The published artifact set on APIs.io includes API documentation.

A web service API for the Retrofit program under Save on Energy, IESO's conservation and demand management portfolio, allowing participants to integrate with the Retrofit application and project workflow. SPEC-188 documents it on the same Online IESO Appian platform (https://online.ieso.ca/suite/webapi/) using API-key authentication via HTTP Basic, an Appian-API-Key header, or a Bearer token. Access requires an IESO-issued API machine account; there is no public signup and no anonymous endpoint.

## Machine-readable artifacts (2)

- **Documentation** — https://www.ieso.ca/-/media/Files/IESO/technical-interfaces/retrofit-system/RetrofitAPI-SPEC-188.pdf
- **Documentation** — https://www.ieso.ca/sector-participants/technical-interfaces

## Other IESO APIs (8)

- [IESO Public Reports Repository](https://apis.io/apis/ieso/ieso-public-reports-repository/)
- [IESO Reports Site REST API](https://apis.io/apis/ieso/ieso-reports-site-rest-api/)
- [IESO Market Information Management (MIM) Web Services](https://apis.io/apis/ieso/ieso-mim-web-services/)
- [IESO Registration System Facilities API](https://apis.io/apis/ieso/ieso-registration-facilities-api/)
- [IESO Retrofit Service Provider API](https://apis.io/apis/ieso/ieso-retrofit-service-provider-api/)
- [IESO Dispatch Service Web Service](https://apis.io/apis/ieso/ieso-dispatch-service-web-service/)
- [IESO Dispatch Notification Service Web Service](https://apis.io/apis/ieso/ieso-dispatch-notification-service/)
- [IESO Outage Coordination and Scheduling System (OCSS) Web Service](https://apis.io/apis/ieso/ieso-ocss-web-service/)

## Tags

Energy Efficiency, Demand Response, Retrofit, REST

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/ieso/ieso-retrofit-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/ieso/.