# SPP LEP/TROLIE Ratings API

**Canonical:** https://apis.io/apis/spp/spp-lep-trolie-api/  
**Provider:** Southwest Power Pool — https://apis.io/providers/spp/  
**Documentation:** https://www.spp.org/documents/72496/spp%20lep%20api%20data%20exchange%20guide.pdf

SPP LEP/TROLIE Ratings API is one of 6 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 Transmission, Ratings, TROLIE, FERC Order 881, and Gated. The published artifact set on APIs.io includes API documentation and an OpenAPI specification.

SPP's REST implementation of GE Vernova's Limit Exchange Portal (LEP) using the LF Energy TROLIE (Transmission Ratings and Operating Limits Information Exchange) API specification, built to meet FERC Order 881 ambient-adjusted ratings obligations. SPP published a versioned Data Exchange Guide (v1.0, 8 Nov 2024) covering monitoring sets, forecast ratings, real-time ratings and seasonal ratings. No production base URL is published — SPP's own guide uses the placeholder https://<baseURL>/ throughout — and access requires an x.509 digital certificate from a CA SPP trusts plus a role assigned in SPP UAA. Not verifiable anonymously.

## Machine-readable artifacts (5)

- **Documentation** — https://www.spp.org/documents/72496/spp%20lep%20api%20data%20exchange%20guide.pdf
- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/spp/refs/heads/main/openapi/trolie-standard-openapi.yml
- **Specification** — https://trolie.energy/spec
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/spp/refs/heads/main/overlays/spp-trolie-standard-overlay.yaml
- **AgentSkill** — https://raw.githubusercontent.com/api-evangelist/spp/refs/heads/main/skills/spp-trolie-ratings-exchange.md

## 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 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/)

## Tags

Transmission, Ratings, TROLIE, FERC Order 881, Gated

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