generated: '2026-07-27'
method: searched
source: >-
Requests taken from CAISO's published OASIS FAQ and Interface Specification examples and
re-issued live against the production hosts on 2026-07-27; every status code, header and
payload excerpt below is what actually came back.
description: >-
Worked, verified request/response pairs for CAISO's two anonymous public interfaces. All
requests are plain HTTP GET with no credentials. Payload excerpts are truncated to the
first rows; nothing here is synthesized.
examples:
- id: oasis-demand-forecast-csv
api: CAISO OASIS Download API
description: Day-ahead system demand forecast for one trade day, CSV.
request:
method: GET
url: https://oasis.caiso.com/oasisapi/SingleZip?queryname=SLD_FCST&market_run_id=DAM&resultformat=6&startdatetime=20260720T07:00-0000&enddatetime=20260721T07:00-0000&version=1
response:
status: 200
content_type: application/x-zip-compressed
content_disposition: inline; filename=20260720_20260721_SLD_FCST_DAM_20260727_14_19_18_v1.zip
bytes: 8952
archive_member: 20260720_20260721_SLD_FCST_DAM_20260727_14_19_18_v1.csv
member_bytes: 119985
body_excerpt: |
INTERVALSTARTTIME_GMT,INTERVALENDTIME_GMT,LOAD_TYPE,OPR_DT,OPR_HR,OPR_INTERVAL,MARKET_RUN_ID,TAC_AREA_NAME,LABEL,XML_DATA_ITEM,POS,MW,EXECUTION_TYPE,GROUP
2026-07-20T23:00:00-00:00,2026-07-21T00:00:00-00:00,1,2026-07-20,17,0,DAM,AVA,Demand Forecast Day Ahead,SYS_FCST_DA_MW,6.8,1715.46,DAM,1
2026-07-21T01:00:00-00:00,2026-07-21T02:00:00-00:00,1,2026-07-20,19,0,DAM,AVA,Demand Forecast Day Ahead,SYS_FCST_DA_MW,6.8,1726.79,DAM,1
verified: '2026-07-27'
- id: oasis-day-ahead-lmp-single-node
api: CAISO OASIS Download API
description: Day-ahead LMP for a single PNode, CSV.
request:
method: GET
url: https://oasis.caiso.com/oasisapi/SingleZip?queryname=PRC_LMP&startdatetime=20260720T07:00-0000&enddatetime=20260721T07:00-0000&version=1&market_run_id=DAM&node=LAPLMG1_7_B2&resultformat=6
response:
status: 200
content_type: application/x-zip-compressed
bytes: 1700
archive_member: 20260720_20260721_PRC_LMP_DAM_20260727_06_13_39_v1.csv
verified: '2026-07-27'
note: >-
Recorded during the 2026-07-27 provider review. CAISO's FAQ example for this report
uses version=12; version=1 also returns data.
- id: oasis-renewables-forecast
api: CAISO OASIS Download API
description: Wind and solar forecast, CSV — CAISO's own FAQ Question Seven example.
request:
method: GET
url: https://oasis.caiso.com/oasisapi/SingleZip?resultformat=6&queryname=SLD_REN_FCST&version=1&market_run_id=DAM&startdatetime=20260720T07:00-0000&enddatetime=20260721T07:00-0000
response:
status: 200
content_type: application/x-zip-compressed
bytes: 1857
verified: '2026-07-27'
- id: oasis-atlas-pnode-reference
api: CAISO OASIS Download API
description: Full ATLAS PNode reference listing — the node dictionary the price reports key on.
request:
method: GET
url: https://oasis.caiso.com/oasisapi/SingleZip?queryname=ATL_PNODE&startdatetime=20260720T07:00-0000&enddatetime=20260721T07:00-0000&version=1&resultformat=6
response:
status: 200
content_type: application/x-zip-compressed
bytes: 266800
verified: '2026-07-27'
- id: oasis-groupzip-day-ahead-lmp
api: CAISO OASIS Download API
description: Whole-day, all-node day-ahead LMP bundle via the GroupZip servlet.
request:
method: GET
url: https://oasis.caiso.com/oasisapi/GroupZip?groupid=DAM_LMP_GRP&startdatetime=20260720T07:00-0000&version=1&resultformat=6
response:
status: 200
content_type: application/x-zip-compressed
bytes: 10161976
verified: '2026-07-27'
note: Ten megabytes for one trade day — use GroupZip rather than looping SingleZip per node.
- id: oasis-error-invalid-report
api: CAISO OASIS Download API
description: >-
Error handling — an unknown queryname still returns HTTP 200 with the error inside the
zipped XML.
request:
method: GET
url: https://oasis.caiso.com/oasisapi/SingleZip?queryname=NOT_A_REPORT&startdatetime=20260720T07:00-0000&enddatetime=20260721T07:00-0000&version=1&resultformat=6
response:
status: 200
content_type: application/x-zip-compressed
content_disposition: inline; filename=INVALID_REQUEST.xml.zip
body_excerpt: |
2026-07-27T21:19:31.777Z
OASIS
v20131201
CAISO
1001
Invalid Parameters of the given report name
verified: '2026-07-27'
- id: oasis-error-range-too-wide
api: CAISO OASIS Download API
description: Requesting more than 31 days returns in-band error 1004.
request:
method: GET
url: https://oasis.caiso.com/oasisapi/SingleZip?queryname=PRC_LMP&startdatetime=20240101T07:00-0000&enddatetime=20260101T07:00-0000&version=12&market_run_id=DAM&node=LAPLMG1_7_B2&resultformat=6
response:
status: 200
error_code: '1004'
error_description: Data can be requested for period of 31 days only
verified: '2026-07-27'
- id: oasis-throttle
api: CAISO OASIS Download API
description: >-
Two identical valid requests issued back to back — the second is rejected by the edge.
request:
method: GET
url: https://oasis.caiso.com/oasisapi/SingleZip?queryname=SLD_FCST&market_run_id=DAM&resultformat=6&startdatetime=20260720T07:00-0000&enddatetime=20260721T07:00-0000&version=1
note: issued twice with no delay
response:
first: {status: 200, bytes: 8952}
second:
status: 429
content_type: text/html
bytes: 114
body: CAISO Acceptable Use Policy Violation. Please retry your request after 5 seconds.
verified: '2026-07-27'
- id: outlook-fuel-mix
api: CAISO Today's Outlook Data Feeds
description: Current-day generation by fuel type at five-minute resolution.
request:
method: GET
url: https://www.caiso.com/outlook/current/fuelsource.csv
response:
status: 200
content_type: text/csv
bytes: 11031
body_excerpt: |
Time,Solar,Wind,Geothermal,Biomass,Biogas,Small hydro,Coal,Nuclear,Natural Gas,Large Hydro,Batteries,Imports,Other
00:00,-68,4649,717,239,165,300,0,2280,13558,3061,775,3379,0
verified: '2026-07-27'
- id: outlook-demand
api: CAISO Today's Outlook Data Feeds
description: Current-day demand with day-ahead and hour-ahead forecasts.
request:
method: GET
url: https://www.caiso.com/outlook/current/demand.csv
response:
status: 200
content_type: text/csv
bytes: 7005
body_excerpt: |
Time,Day ahead forecast,Hour ahead forecast,Current demand,Demand response
00:00,30243,29312,29138,
verified: '2026-07-27'
- id: outlook-history
api: CAISO Today's Outlook Data Feeds
description: A past operating day, same schema as the current-day feed.
request:
method: GET
url: https://www.caiso.com/outlook/history/20260720/netdemand.csv
response:
status: 200
content_type: text/csv
bytes: 9284
body_excerpt: |
Time,Hour ahead forecast,Current demand,Net demand,Net demand forecast,Demand response
00:00,28824,28646,23486,24832,
verified: '2026-07-27'