GET
/
interconnection
/
caiso
Get CAISO interconnection queue data
curl --request GET \
  --url https://api.cleanview.co/api/v1/interconnection/caiso \
  --header 'x-api-key: <api-key>'
{
  "iso": "CAISO",
  "summary": {
    "limit": 50,
    "offset": 0,
    "total_results": 3027,
    "has_more": true,
    "current_page": 1,
    "total_pages": 61
  },
  "filters": {
    "state": null,
    "technology": null,
    "status": null,
    "min_capacity": null,
    "max_capacity": null,
    "developer": null
  },
  "data": [
    {
      "iso": "CISO",
      "queue_id": "1000_combined_cycle",
      "project_name": "Heca Scs",
      "capacity_mw": 300,
      "technology": "Combined Cycle",
      "technology_normalized": "Natural Gas",
      "fuel": "Other",
      "status": "Cancelled",
      "detailed_status": "Withdrawn",
      "operating_date": "2019-01-01T00:00:00.000Z",
      "request_date": "2013-05-01T00:00:00.000Z",
      "state": "CA",
      "county": "Kern",
      "queue_position": "1000",
      "interconnecting_entity": null,
      "developer": "NextEra Energy Resources",
      "feasibility_study_status": null,
      "system_impact_study_status": "Complete",
      "facilities_study_status": null,
      "optional_study_status": null,
      "interconnection_agreement_status": null,
      "deliverability_status": "Full Capacity",
      "voltage_kv": null,
      "station_transmission_line": "Midway-Wheeler Ridge 230 kV Line",
      "study_area": null,
      "balancing_authority_code": "CISO"
    },
    {
      "iso": "CISO",
      "queue_id": "54571_storage",
      "project_name": "Borderline Solar",
      "capacity_mw": 150,
      "technology": "Battery",
      "technology_normalized": "Battery",
      "fuel": "Battery",
      "status": "Planned",
      "detailed_status": "Active",
      "operating_date": "2026-06-01T00:00:00.000Z",
      "request_date": "2024-02-15T00:00:00.000Z",
      "state": "CA",
      "county": "Riverside",
      "queue_position": null,
      "interconnecting_entity": null,
      "developer": "Terra-Gen",
      "feasibility_study_status": "In Progress",
      "system_impact_study_status": null,
      "facilities_study_status": null,
      "optional_study_status": null,
      "interconnection_agreement_status": null,
      "deliverability_status": "Energy Only",
      "voltage_kv": 230,
      "station_transmission_line": "Devers-Palo Verde 500 kV Line",
      "study_area": null,
      "balancing_authority_code": "CISO"
    }
  ]
}

​
Overview

The CAISO interconnection queue endpoint provides access to real-time data from the California Independent System Operator (CAISO) interconnection queue, which serves most of California and parts of Nevada.
CAISO Coverage: Contains 3,027 projects across California (89%), Nevada (5%), Arizona (4%), and Mexico (1%). Top technologies: Solar (1,200+ projects), Battery Storage (1,100+ projects), Wind (300+ projects).
Hybrid Projects: CAISO represents hybrid projects (e.g., solar + storage) as single rows in their Excel source files with multiple technology columns. Our API splits these into separate records for each technology component. See our comprehensive guide on hybrid project handling for details.

​
Endpoint

curl -H "x-api-key: your_api_key_here" \
  "https://api.cleanview.co/api/v1/interconnection/caiso?limit=50"

​
Query Parameters

ParameterTypeDefaultDescription
limitinteger1000Number of records to return (50-5000)
offsetinteger0Number of records to skip
statestring-Filter by state code (CA, NV, AZ) - supports comma-separated
technologystring-Filter by standardized technology type - supports comma-separated
statusstring-Filter by standardized status
min_capacitynumber-Minimum capacity in MW
max_capacitynumber-Maximum capacity in MW
developerstring-Filter by developer name (supports partial matches)

​
Technology Options

Use standardized technology names for consistent filtering. See our Interconnection Reference for all available options.
CAISO Technology Field Mapping: CAISO represents technology information differently from other ISOs. When filtering by technology=Solar, the API searches both the technology field (which contains CAISO’s original terms like “Photovoltaic”) and the fuel field (which contains “Solar”). This ensures consistent cross-ISO filtering while preserving CAISO’s original data structure.Example: A CAISO solar project returns:
  • technology: “Photovoltaic” (CAISO’s original term)
  • fuel: “Solar” (standardized term)
  • Both fields are searched when using technology=Solar filter
TechnologyCountDescription
Solar1,200+Solar photovoltaic projects (searches both technology and fuel fields)
Battery1,100+Battery energy storage systems
Wind300+Wind turbine projects
Natural Gas180+Natural gas generation
Other200+Other technologies

​
Status Options

StatusCountDescription
Planned1,800+Active projects in queue
Operating800+Commercial operation achieved
Cancelled400+Withdrawn or terminated

​
Example Requests

curl -H "x-api-key: your_api_key_here" \
  "https://api.cleanview.co/api/v1/interconnection/caiso?technology=Solar&status=Planned&state=CA&limit=50"
Returns active solar projects in the CAISO queue. Uses technology=Solar for standardized filtering.
curl -H "x-api-key: your_api_key_here" \
  "https://api.cleanview.co/api/v1/interconnection/caiso?technology=Battery&min_capacity=100&limit=50"
Finds large-scale battery storage projects. Uses technology=Battery for energy storage systems.
curl -H "x-api-key: your_api_key_here" \
  "https://api.cleanview.co/api/v1/interconnection/caiso?technology=Wind&limit=50"
Filters for wind projects in the CAISO queue.
curl -H "x-api-key: your_api_key_here" \
  "https://api.cleanview.co/api/v1/interconnection/caiso?technology=Solar,Wind,Battery&limit=50"
Uses comma-separated values for multiple technology filtering.
curl -H "x-api-key: your_api_key_here" \
  "https://api.cleanview.co/api/v1/interconnection/caiso?developer=NextEra&limit=50"
Filters for projects developed by NextEra Energy. Uses partial matching, so “NextEra” matches “NextEra Energy Resources”.
curl -H "x-api-key: your_api_key_here" \
  "https://api.cleanview.co/api/v1/interconnection/caiso?developer=null&limit=50"
Returns only projects that don’t have developer information mapped in Cleanview’s database.

​
Response Schema

{
  "iso": "CAISO",
  "summary": {
    "limit": 50,
    "offset": 0,
    "total_results": 3027,
    "has_more": true,
    "current_page": 1,
    "total_pages": 61
  },
  "filters": {
    "state": null,
    "technology": null,
    "status": null,
    "min_capacity": null,
    "max_capacity": null,
    "developer": null
  },
  "data": [
    {
      "iso": "CISO",
      "queue_id": "1000_combined_cycle",
      "project_name": "Heca Scs",
      "capacity_mw": 300,
      "technology": "Combined Cycle",
      "technology_normalized": "Natural Gas",
      "fuel": "Other",
      "status": "Cancelled",
      "detailed_status": "Withdrawn",
      "operating_date": "2019-01-01T00:00:00.000Z",
      "request_date": "2013-05-01T00:00:00.000Z",
      "state": "CA",
      "county": "Kern",
      "queue_position": "1000",
      "interconnecting_entity": null,
      "developer": "NextEra Energy Resources",
      "feasibility_study_status": null,
      "system_impact_study_status": "Complete",
      "facilities_study_status": null,
      "optional_study_status": null,
      "interconnection_agreement_status": null,
      "deliverability_status": "Full Capacity",
      "voltage_kv": null,
      "station_transmission_line": "Midway-Wheeler Ridge 230 kV Line",
      "study_area": null,
      "balancing_authority_code": "CISO"
    },
    {
      "iso": "CISO",
      "queue_id": "54571_storage",
      "project_name": "Borderline Solar",
      "capacity_mw": 150,
      "technology": "Battery",
      "technology_normalized": "Battery",
      "fuel": "Battery",
      "status": "Planned",
      "detailed_status": "Active",
      "operating_date": "2026-06-01T00:00:00.000Z",
      "request_date": "2024-02-15T00:00:00.000Z",
      "state": "CA",
      "county": "Riverside",
      "queue_position": null,
      "interconnecting_entity": null,
      "developer": "Terra-Gen",
      "feasibility_study_status": "In Progress",
      "system_impact_study_status": null,
      "facilities_study_status": null,
      "optional_study_status": null,
      "interconnection_agreement_status": null,
      "deliverability_status": "Energy Only",
      "voltage_kv": 230,
      "station_transmission_line": "Devers-Palo Verde 500 kV Line",
      "study_area": null,
      "balancing_authority_code": "CISO"
    }
  ]
}

​
Response Fields

​
Core Fields (Always Present)

FieldTypeDescription
isostringAlways “CISO” for CAISO data
queue_idstringUnique CAISO queue identifier (e.g., “1379_photovoltaic”)
project_namestringProject name (always available for CAISO)
capacity_mwnumberProject capacity in MW
technologystringStandardized technology type
statusstringStandardized status (Planned, Operating, Cancelled)
queue_positionstringQueue position number (null for projects without assigned queue positions)
balancing_authority_codestringAlways “CISO”

​
Location & Timing

FieldTypeDescription
statestringState code (CA=89%, NV=5%, AZ=4%, MX=1%)
countystringCounty name where project is located
operating_datedateExpected/actual commercial operation date
request_datedateDate project entered queue

​
Technology & Fuel

FieldTypeDescription
technology_normalizedstringSame as technology for consistency
fuelstringFuel type (Solar, Wind Turbine, Battery, etc.)

​
Study Process (CAISO-Specific)

FieldTypeDescription
feasibility_study_statusstringFeasibility study completion status
system_impact_study_statusstringSystem impact study status
facilities_study_statusstringFacilities study completion status
optional_study_statusstringOptional study status
interconnection_agreement_statusstringInterconnection agreement execution status

​
Grid Connection Details

FieldTypeDescription
deliverability_statusstringFull Capacity, Energy Only, Partial Capacity
voltage_kvnumberInterconnection voltage level (kV)
station_transmission_linestringInterconnection point description
study_areastringCAISO study area (typically null)

​
Developer Information

FieldTypeDescription
interconnecting_entitystringAlways null - CAISO queue does not provide interconnecting entity information
developerstringDeveloper name from Cleanview’s database (e.g., “NextEra Energy”, “Tesla”)
Data Updates: CAISO queue data is updated weekly. The API reflects the most recent queue data available from CAISO’s public reports.
Field Availability: Due to the nature of the CAISO interconnection queue, the interconnecting_entity field is always null. CAISO does not provide interconnecting entity information in their queue data. Use station_transmission_line for interconnection point details.
Missing Coordinates: CAISO data does not include latitude/longitude coordinates. For location analysis, use the county and state fields or the station_transmission_line for grid connection points.

Authorizations

​
x-api-key
string
header
required

API key authentication using x-api-key header

Query Parameters

​
limit
integer
default:50

Number of records to return

Required range: 50 <= x <= 5000
​
offset
integer
default:0

Number of records to skip

​
state
string

Filter by state code (CA, NV, AZ)

​
technology
string

Filter by technology type

​
min_capacity
number

Minimum capacity in MW

​
max_capacity
number

Maximum capacity in MW

Response

Successful response with CAISO interconnection queue data

​
iso
string
Example:

"CAISO"

​
summary
object

Summary metadata for pagination

​
filters
object

Applied filters for the request

​
data
object[]

Array of interconnection queue records