# IESO Outage Coordination and Scheduling System (OCSS) Web Service

**Canonical:** https://apis.io/apis/ieso/ieso-ocss-web-service/  
**Provider:** IESO — https://apis.io/providers/ieso/  
**Documentation:** https://www.ieso.ca/sector-participants/technical-interfaces

IESO Outage Coordination and Scheduling System (OCSS) Web Service is one of 9 APIs that [IESO](https://apis.io/providers/ieso/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Outages, Scheduling, Transmission, and Market Participants. The published artifact set on APIs.io includes API documentation.

A web service, specified in SPEC-113, for submitting and managing transmission and generation outage requests in IESO's Outage Coordination and Scheduling System. The design specification is public; the service itself is restricted to registered market participants. Note that the resulting outage data is republished anonymously through the public report repository (TxOutages* and TxOutagesTodayAll directories) — the write side is gated, the read side is open.

## Machine-readable artifacts (2)

- **Documentation** — https://www.ieso.ca/-/media/Files/IESO/technical-interfaces/outage-management/WebServiceDesignSpec_SPEC-113.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 System API](https://apis.io/apis/ieso/ieso-retrofit-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/)

## Tags

Outages, Scheduling, Transmission, Market Participants

---

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