# CAISO OASIS Download API

**Canonical:** https://apis.io/apis/caiso/caiso-oasis-download-api/  
**Provider:** California ISO — https://apis.io/providers/caiso/  
**Base URL:** https://oasis.caiso.com/oasisapi  
**Documentation:** https://www.caiso.com/systems-applications/developer-portal

CAISO OASIS Download API is one of 2 APIs that [California ISO](https://apis.io/providers/caiso/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Energy Markets, Electricity, Market Data, Pricing, and Forecasting. The published artifact set on APIs.io includes API documentation, an API reference, authentication docs, rate-limit docs, and a changelog.

The Open Access Same-time Information System (OASIS) Download API — CAISO's public wholesale market data interface. Two servlets, SingleZip and GroupZip, accept a queryname or groupid plus a UTC datetime range and return a ZIP containing CIM-format XML (resultformat=5) or CSV (resultformat=6). Report families cover locational marginal prices (PRC_LMP, PRC_INTVL_LMP, PRC_CURR_LMP), system load and renewables forecasts (SLD_FCST, SLD_REN_FCST), ancillary services, congestion revenue rights, and the ATLAS reference data set (ATL_PNODE and friends). Requests are anonymous — no API key, token, or account. Most reports retain roughly the previous 39 months of data and individual reports cap the date range they will return.

## Machine-readable artifacts (16)

- **Documentation** — https://www.caiso.com/documents/oasis-frequently-asked-questions.pdf
- **Documentation** — https://www.caiso.com/documents/oasisapispecification.pdf
- **Documentation** — https://www.caiso.com/systems-applications/developer-portal
- **SignUp** — https://developer.caiso.com/_login/developersignup.aspx
- **Portal** — https://oasis.caiso.com/mrioasis/logon.do
- **APIReference** — https://www.caiso.com/documents/oasisapispecification.pdf
- **TermsOfService** — https://www.caiso.com/privacy-terms-of-use#api-terms-of-use
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/caiso/refs/heads/main/authentication/caiso-authentication.yml
- **Conventions** — https://raw.githubusercontent.com/api-evangelist/caiso/refs/heads/main/conventions/caiso-conventions.yml
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/caiso/refs/heads/main/errors/caiso-error-codes.yml
- **RateLimits** — https://raw.githubusercontent.com/api-evangelist/caiso/refs/heads/main/rate-limits/caiso-rate-limits.yml
- **Vocabulary** — https://raw.githubusercontent.com/api-evangelist/caiso/refs/heads/main/vocabulary/caiso-oasis-query-names.yml
- **Examples** — https://raw.githubusercontent.com/api-evangelist/caiso/refs/heads/main/examples/caiso-oasis-examples.yml
- **Lifecycle** — https://raw.githubusercontent.com/api-evangelist/caiso/refs/heads/main/lifecycle/caiso-lifecycle.yml
- **ChangeLog** — https://raw.githubusercontent.com/api-evangelist/caiso/refs/heads/main/changelog/caiso-changelog.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/caiso/refs/heads/main/apis.yml

## Other California ISO APIs (1)

- [CAISO Today's Outlook Data Feeds](https://apis.io/apis/caiso/caiso-todays-outlook-data-feeds/)

## Tags

Energy Markets, Electricity, Market Data, Pricing, Forecasting, Grid

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