# MISO File Download API

**Canonical:** https://apis.io/apis/miso/miso-file-download-api/  
**Provider:** MISO — https://apis.io/providers/miso/  
**Base URL:** https://markets.midwestiso.org/portalDownload  
**Documentation:** https://cdn.misoenergy.org/MISO%20-%20File%20Download%20Specification424459.pdf

MISO File Download API is one of 38 APIs that [MISO](https://apis.io/providers/miso/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Energy Markets, Market Participants, Bulk Download, Settlement, and Invoices. The published artifact set on APIs.io includes API documentation.

The bulk file-retrieval counterpart to MUI 2.0, on the same two client-certificate-gated hosts and documented only in a PDF. MISO's File Download Specification lays out a consistent pair of operations per report family — GET /portalDownload/{type}/files to list what is available and GET /portalDownload/{type}/file to retrieve one — across at least nine types: day-ahead schedule reports (dasr), electric quarterly reports (eqr), exposure, invoices, market clearing and market results (mcmr), market operations control reports (mocr), resource load and adjustment (rla) and settlement statement information (ssi), each with its own query parameters for entity, date, asset owner, market type and output format. Production is https://markets.midwestiso.org/portalDownload and the customer-facing test environment is https://cce.midwestiso.org/portalDownload. Access is gated exactly as MUI 2.0 is: an anonymous TLS connection to either host on 2026-08-06 failed at the handshake with an SSL alert rather than returning any HTTP status, which is direct evidence of mutual-TLS client-certificate enforcement. NO MACHINE-READABLE CONTRACT IS PUBLISHED FOR THIS API and none could be harvested. MISO does publish one for MUI 2.0, at cdn.misoenergy.org, so the capability plainly exists — it was simply never done for this surface. The 145KB specification PDF is the only description of it that exists.

## Machine-readable artifacts (2)

- **Documentation** — https://cdn.misoenergy.org/MISO%20-%20File%20Download%20Specification424459.pdf
- **Onboarding** — https://www.misoenergy.org/markets-and-operations/mp-registration/market-participation/

## Other MISO APIs (12)

- [MISO Market Reports](https://apis.io/apis/miso/miso-market-reports/)
- [MISO FTR MPMA Market User API](https://apis.io/apis/miso/miso-ftr-mpma-market-user-api/)
- [MISO EDR Service (Electronic Data Reporting)](https://apis.io/apis/miso/miso-edr-service/)
- [MISO CROW API (Outage Scheduling)](https://apis.io/apis/miso/miso-crow-api/)
- [MISO Fuel and Consumables Data Request API](https://apis.io/apis/miso/miso-fuel-and-consumables-api/)
- [MISO Market Portal Meter Data and Settlement Statements API](https://apis.io/apis/miso/miso-meter-data-and-settlement-statements-api/)
- [MISO Ace API](https://apis.io/apis/miso/miso-ace-api/)
- [MISO Admin API](https://apis.io/apis/miso/miso-admin-api/)
- [MISO Aggregated Pnode API](https://apis.io/apis/miso/miso-aggregated-pnode-api/)
- [MISO Bidding API](https://apis.io/apis/miso/miso-bidding-api/)
- [MISO Binding Constraints API](https://apis.io/apis/miso/miso-bindingconstraints-api/)
- [MISO Contracts API](https://apis.io/apis/miso/miso-contracts-api/)

## Tags

Energy Markets, Market Participants, Bulk Download, Settlement, Invoices, Client Certificate

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