IESO Reports Site REST API

aid: ieso:ieso-reports-site-rest-api
name: IESO Reports Site REST API
description: 'A RESTful file-access API provided by Axway SecureTransport, used to automate retrieval
  of reports from the IESO Reports Site. Accepts and returns both JSON and XML, and exposes file and directory
  listing (GET /files, GET /files/{path}), file property inspection (?status) and file download, with
  limit, sortBy and order parameters. Every request must carry the query string parameter ?idp_id=ieso
  and HTTP Basic credentials. IESO documents this endpoint only for the CONFIDENTIAL participant report
  repository — the guide states plainly that "the recommended programmatic access applies to confidential
  reports repository and not public reports". Credentials are IESO-issued machine accounts granted to
  registered Ontario market participants on request; there is no self-serve signup. Probed anonymously
  on 2026-07-27: https://reports.ieso.ca/api/v1.4/files?idp_id=ieso returned HTTP 401, and the sandbox
  at reports-sandbox.ieso.ca returned HTTP 401. The same path on the public host (reports-public.ieso.ca)
  returned HTTP 404 — the open data is not served through this API.'
humanURL: https://www.ieso.ca/sector-participants/technical-interfaces
baseURL: https://reports.ieso.ca/api/v1.4
tags:
- Reports
- File Transfer
- Market Participants
- REST
properties:
- type: Documentation
  url: https://www.ieso.ca/-/media/Files/IESO/technical-interfaces/api-reports-guide/IESO_Reports_API_Guide.pdf
- type: Specification
  url: https://www.ieso.ca/-/media/Files/IESO/technical-interfaces/xml-automated-docs/IMO_SPEC_0100.pdf
- type: Documentation
  url: https://www.ieso.ca/sector-participants/technical-interfaces