Southwest Power Pool

SPP Integrated Marketplace Markets Web Service

The SOAP web and notification services market participants use to submit offers and bids and retrieve results from the SPP Integrated Marketplace, with WEIS Markets Web Service as the western equivalent and the Settlement Management System API for settlements. SPP's System Interfaces Stakeholder Reference Guide (v1.0, 29 Jan 2025) names these as SOAP and REST services over HTTPS requiring two-factor authentication; the Markets+ platform is stated to move to RESTful APIs. WSDLs, XSDs and endpoint URLs are published only inside the member-facing Change User Forum technical reference documents and were not retrievable anonymously; no base URL is public.

GitHub

Documentation

📖
Documentation
https://www.spp.org/documents/73131/spp%20system%20interfaces%20stakeholder%20reference%20guide%2020250129.pdf
📖
Documentation
https://www.spp.org/stakeholder-center/user-guides-apis-integrations/
📖
Documentation
https://www.spp.org/documents/18307/digital%20certificates%20and%20the%20integrated%20marketplace%20doc_final.pdf

API entry from apis.yml

apis.yml Raw ↑ 
aid: spp:spp-integrated-marketplace-web-services
name: SPP Integrated Marketplace Markets Web Service
description: The SOAP web and notification services market participants use to submit offers and bids
  and retrieve results from the SPP Integrated Marketplace, with WEIS Markets Web Service as the western
  equivalent and the Settlement Management System API for settlements. SPP's System Interfaces Stakeholder
  Reference Guide (v1.0, 29 Jan 2025) names these as SOAP and REST services over HTTPS requiring two-factor
  authentication; the Markets+ platform is stated to move to RESTful APIs. WSDLs, XSDs and endpoint URLs
  are published only inside the member-facing Change User Forum technical reference documents and were
  not retrievable anonymously; no base URL is public.
humanURL: https://www.spp.org/documents/73131/spp%20system%20interfaces%20stakeholder%20reference%20guide%2020250129.pdf
tags:
- SOAP
- Wholesale Markets
- Settlements
- Gated
properties:
- type: Documentation
  url: https://www.spp.org/documents/73131/spp%20system%20interfaces%20stakeholder%20reference%20guide%2020250129.pdf
- type: Documentation
  url: https://www.spp.org/stakeholder-center/user-guides-apis-integrations/
- type: Documentation
  url: https://www.spp.org/documents/18307/digital%20certificates%20and%20the%20integrated%20marketplace%20doc_final.pdf