# Southwest Power Pool Seasonal API

**Canonical:** https://apis.io/apis/spp/spp-seasonal-api/  
**Provider:** Southwest Power Pool — https://apis.io/providers/spp/  
**Base URL:** ftp://pubftp.spp.org  
**Documentation:** https://spp.org/documents/28853/spp%20public%20data%20access%2020230707.pdf

Southwest Power Pool Seasonal API is one of 11 APIs that [Southwest Power Pool](https://apis.io/providers/spp/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Seasonal. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

Seasonal ratings are static ratings associated with extended durations, typically months. These are typically used in both planning and operations. Power system resources that are exempt from providing AARs generally operate at a seasonal rating. Even for resources using dynamic ratings, a seasonal rating is still necessary. This acts as a recourse when a dynamic rating is unavailable. For example, a dynamic rating might be unavailable during communication outages or for forecasts beyond the ten-day period required by FERC Order 881.

## Operations (3)

| Method | Path | Summary |
|---|---|---|
| GET | `/seasonal-ratings/snapshot` | Get Seasonal Ratings |
| GET | `/rating-proposals/seasonal` | Obtain seasonal rating proposal status |
| PATCH | `/rating-proposals/seasonal` | Submit a Seasonal Ratings proposal |

## Machine-readable artifacts (3)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/spp/refs/heads/main/openapi/spp-seasonal-api-openapi.yml
- **Documentation** — https://www.spp.org/documents/72496/spp%20lep%20api%20data%20exchange%20guide.pdf
- **Specification** — https://trolie.energy/spec

## Other Southwest Power Pool APIs (10)

- [SPP Public Data FTP](https://apis.io/apis/spp/spp-public-data-ftp/)
- [SPP Portal Public Data File Browser API](https://apis.io/apis/spp/spp-portal-file-browser-api/)
- [SPP Portal Chart API](https://apis.io/apis/spp/spp-portal-chart-api/)
- [SPP Price Contour Map ArcGIS REST Services](https://apis.io/apis/spp/spp-price-contour-map-arcgis/)
- [SPP Integrated Marketplace Markets Web Service](https://apis.io/apis/spp/spp-integrated-marketplace-web-services/)
- [Southwest Power Pool Forecasting API](https://apis.io/apis/spp/spp-forecasting-api/)
- [Southwest Power Pool Monitoring Sets API](https://apis.io/apis/spp/spp-monitoring-sets-api/)
- [Southwest Power Pool Real Time API](https://apis.io/apis/spp/spp-real-time-api/)
- [Southwest Power Pool Seasonal Overrides API](https://apis.io/apis/spp/spp-seasonal-overrides-api/)
- [Southwest Power Pool Temporary AAR Exceptions API](https://apis.io/apis/spp/spp-temporary-aar-exceptions-api/)

## Tags

Seasonal

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