# California ISO

**Canonical:** https://apis.io/providers/caiso/  
**Website:** https://www.caiso.com/  
**APIs profiled:** 2

The California Independent System Operator (CAISO) is the non-profit public benefit corporation that operates the high-voltage transmission grid serving roughly 80 percent of California plus a portion of Nevada, and runs the wholesale day-ahead and real-time electricity markets, the Western Energy Imbalance Market (WEIM), and the Extended Day-Ahead Market (EDAM). As a system and market operator in the United States it sits at the wholesale layer of the energy value chain — upstream of the investor-owned utilities that bill retail customers, and therefore it holds no retail customer accounts and publishes no consumer usage data. Its API posture is a clean split: market data is genuinely open and consumer data does not exist. The OASIS Download API at https://oasis.caiso.com/oasisapi serves locational marginal prices, demand and renewables forecasts, ancillary services, transmission and nodal reference data as zipped CSV or CIM XML to anonymous callers with no key, no account and no registration — CAISO states in writing that every system it operates except OASIS requires a company User Access Administrator to grant access. The Today's Outlook telemetry feeds under https://www.caiso.com/outlook publish five-minute fuel mix, demand, net demand and CO2 as plain CSV, also anonymously. Everything else — market submission, dispatch, settlements and the participant portals — is behind PKI client certificates and UAA-sponsored accounts, and even the OASIS reference documentation on the developer site requires a signup reviewed against a corporate email domain and a written justification. No Green Button, ESPI, or Consumer Data Right surface exists here and none is expected to; the obligation CAISO answers to is FERC's open-access transparency regime, not a consumer data right. No OpenAPI, AsyncAPI, or other machine-readable contract is published for any of it.

## Kin Score — 37.6 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 37.6).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 1.4 |
| Governance | 19.7 |
| Contract Governance | 19.7 |
| Operational Transparency | 52.6 |
| Developer Ergonomics | 57.1 |
| Commercial Clarity | 34.2 |
| Access Clarity | 34.2 |

Regulatory layer — **Energy & Utilities**: 33.8 (matched via tags).

## Agent readiness — 16.5 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | documented |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## APIs (2)

- **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 g...
- **CAISO Today's Outlook Data Feeds** — The CSV feeds behind CAISO's public Today's Outlook dashboard. Anonymous GET requests to https://www.caiso.com/outlook/current/{report}.csv return the current operating day at f...

## Security (2)

- **Caiso Authentication** — none/mutualTLS · 2 schemes
- **Caiso Domain Security** — TLSv1.3 · DMARC

## Tags

Energy, United States, Electricity, Energy Markets, Grid, Renewables, System Operator, Market Data, California

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/caiso/). Scores are computed from the provider's own public artifacts under a published rubric.