# Southwest Power Pool Forecasting API

**Canonical:** https://apis.io/apis/spp/spp-forecasting-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 Forecasting 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 Forecasting. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

The Forecasting API operations define the exchange of forecasted ratings, including the 240-hour-ahead forecasted AAR data exchange required by FERC Order 881. The operations support submitting rating proposals, querying in-use limits, and monitoring the health and validity of submissions against the Rating Provider's obligations.

## Operations (6)

| Method | Path | Summary |
|---|---|---|
| GET | `/limits/forecast-snapshot` | Limits Forecast Snapshot |
| GET | `/limits/forecast-snapshot/{period}` | Historical Limits Forecast Snapshot |
| GET | `/limits/regional/forecast-snapshot` | Regional Limits Forecast Snapshot |
| POST | `/limits/regional/forecast-snapshot` | Update Regional Limits Forecast Snapshot |
| GET | `/rating-proposals/forecast` | Obtain forecast proposal status |
| PATCH | `/rating-proposals/forecast` | Submit a Forecast Proposal |

## Machine-readable artifacts (3)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/spp/refs/heads/main/openapi/spp-forecasting-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 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 API](https://apis.io/apis/spp/spp-seasonal-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

Forecasting

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