Southwest Power Pool

SPP Portal Chart API

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.

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Documentation

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

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API entry from apis.yml

apis.yml Raw ↑ 
aid: spp:spp-portal-chart-api
name: SPP Portal Chart API
description: '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.'
humanURL: https://portal.spp.org/pages/generation-mix-historical
baseURL: https://portal.spp.org/chart-api
tags:
- Public Data
- Generation Mix
- Load Forecast
properties:
- type: Documentation
  url: https://portal.spp.org/pages/generation-mix-historical