# SPP Portal Chart API

**Canonical:** https://apis.io/apis/spp/spp-portal-chart-api/  
**Provider:** Southwest Power Pool — https://apis.io/providers/spp/  
**Base URL:** https://portal.spp.org/chart-api  
**Documentation:** https://portal.spp.org/pages/generation-mix-historical

SPP Portal Chart API is one of 6 APIs that [Southwest Power Pool](https://apis.io/providers/spp/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Public Data, Generation Mix, and Load Forecast. The published artifact set on APIs.io includes API documentation.

JSON and CSV chart feeds serving the SPP Portal dashboards. Confirmed anonymously on 2026-07-27: /chart-api/gen-mix/asChart and /chart-api/load-forecast/asChart return application/json with labelled hourly datasets by fuel type and load forecast series, and /chart-api/gen-mix-365/asFile returns a rolling 365-day generation mix CSV. Undocumented as a formal interface specification; served without authentication.

## Machine-readable artifacts (1)

- **Documentation** — https://portal.spp.org/pages/generation-mix-historical

## Other Southwest Power Pool APIs (5)

- [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 Price Contour Map ArcGIS REST Services](https://apis.io/apis/spp/spp-price-contour-map-arcgis/)
- [SPP LEP/TROLIE Ratings API](https://apis.io/apis/spp/spp-lep-trolie-api/)
- [SPP Integrated Marketplace Markets Web Service](https://apis.io/apis/spp/spp-integrated-marketplace-web-services/)

## Tags

Public Data, Generation Mix, Load Forecast

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