California ISO

CAISO OASIS Download API

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.

GitHub

Documentation

📖
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
📖
APIReference
https://www.caiso.com/documents/oasisapispecification.pdf
📖
Authentication
https://raw.githubusercontent.com/api-evangelist/caiso/refs/heads/main/authentication/caiso-authentication.yml
📖
RateLimits
https://raw.githubusercontent.com/api-evangelist/caiso/refs/heads/main/rate-limits/caiso-rate-limits.yml

Other Resources

🔗
SignUp
https://developer.caiso.com/_login/developersignup.aspx
🔗
Portal
https://oasis.caiso.com/mrioasis/logon.do
🔗
TermsOfService
https://www.caiso.com/privacy-terms-of-use#api-terms-of-use
🔗
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
🔗
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

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API entry from apis.yml

apis.yml Raw ↑ 
aid: caiso:caiso-oasis-download-api
name: CAISO OASIS Download API
description: 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.
humanURL: https://www.caiso.com/systems-applications/developer-portal
baseURL: https://oasis.caiso.com/oasisapi
tags:
- Energy Markets
- Electricity
- Market Data
- Pricing
- Forecasting
- Grid
properties:
- type: Documentation
  url: https://www.caiso.com/documents/oasis-frequently-asked-questions.pdf
- type: Documentation
  url: https://www.caiso.com/documents/oasisapispecification.pdf
- type: Documentation
  url: https://www.caiso.com/systems-applications/developer-portal
- type: SignUp
  url: https://developer.caiso.com/_login/developersignup.aspx
- type: Portal
  url: https://oasis.caiso.com/mrioasis/logon.do
- type: APIReference
  url: https://www.caiso.com/documents/oasisapispecification.pdf
- type: TermsOfService
  url: https://www.caiso.com/privacy-terms-of-use#api-terms-of-use
- type: Authentication
  url: authentication/caiso-authentication.yml
- type: Conventions
  url: conventions/caiso-conventions.yml
- type: ErrorCatalog
  url: errors/caiso-error-codes.yml
- type: RateLimits
  url: rate-limits/caiso-rate-limits.yml
- type: Vocabulary
  url: vocabulary/caiso-oasis-query-names.yml
- type: Examples
  url: examples/caiso-oasis-examples.yml
- type: Lifecycle
  url: lifecycle/caiso-lifecycle.yml
- type: ChangeLog
  url: changelog/caiso-changelog.yml