# Hydrostor

**Canonical:** https://apis.io/providers/hydrostor/  
**Website:** https://hydrostor.ca/  
**APIs profiled:** 9

Hydrostor is a Canadian long-duration energy storage developer founded in 2010 and headquartered in Toronto, with offices in Denver, Colorado and Melbourne and Adelaide, Australia. It builds and operates Advanced Compressed Air Energy Storage (A-CAES) facilities: surplus grid electricity runs a compressor, the heat of compression is captured and stored, and the cooled compressed air is sent into a purpose-built underground cavern held at constant pressure by a water column. On discharge the water weight pushes the air back to surface, where it is recombined with the stored heat and expanded through a turbine, giving eight or more hours of emissions-free storage from a plant with a multi-decade asset life. The company is backed by Goldman Sachs Alternatives, CPP Investments, the Canada Growth Fund, Canoe Financial and Arctern Ventures, operates a commercially contracted utility-scale facility in Goderich, Ontario, and is advancing a roughly 7 GW pipeline including the Willow Rock and Copper Valley centers in California, Silver City in New South Wales, and Quinte and Wellington in Ontario. Hydrostor is an energy infrastructure developer rather than a software vendor: it publishes no developer portal, no SDKs, no product API and no machine-readable specification of its own. The only machine-readable interface it exposes is the WordPress core REST content API behind hydrostor.ca, which is anonymously readable, read-only without credentials, and carries the project portfolio, the newsroom archive and the media library. That surface is profiled here for discovery purposes and is described from the site's own self-describing route index.

## Kin Score — 35.4 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (-0.7 from 36.1).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 59.0 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 16.1 |
| Commercial Clarity | 21.1 |
| Access Clarity | 21.1 |

Regulatory layer — **Energy & Utilities**: 44.6 (matched via tags).

## Agent readiness — 27.7 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | documented |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## APIs (9)

- **Hydrostor Projects API** — Public, unauthenticated read access to Hydrostor's Advanced Compressed Air Energy Storage project portfolio — the site-specific `project` custom post type behind hydrostor.ca/pr...
- **Hydrostor Posts API** — Public, unauthenticated read access to the Hydrostor newsroom archive — press releases, company insights and featured media coverage — via the WordPress core REST API behind hyd...
- **Hydrostor Pages API** — Public, unauthenticated read access to the static marketing and policy pages of hydrostor.ca — the company, technology and geology explainers, the project index, use cases, care...
- **Hydrostor Media API** — Public, unauthenticated read access to the media library behind hydrostor.ca — project renders, facility and geology photography, technology diagrams and press assets, each with...
- **Hydrostor Taxonomy API** — Public, unauthenticated read access to the classification vocabularies behind hydrostor.ca: newsroom categories and tags, plus the site-specific `project_category` and `project_...
- **Hydrostor Search API** — Public, unauthenticated cross-content search over hydrostor.ca — newsroom posts, static pages and the A-CAES project portfolio in one result set, each result carrying its id, ti...
- **Hydrostor Discovery API** — Public, unauthenticated discovery metadata for hydrostor.ca — the self-describing route index (340 routes across 18 namespaces at capture), the registered content types and taxo...
- **Hydrostor oEmbed API** — Public oEmbed 1.0 provider endpoint for hydrostor.ca URLs, returning embeddable rich metadata — title, author, thumbnail and iframe HTML — for any newsroom post, static page or ...
- **Hydrostor SEO Metadata API** — Public Yoast SEO head endpoint returning the rendered head metadata and its parsed schema.org JSON-LD graph for any hydrostor.ca URL — a structured-data view of every newsroom p...

## Agentic access (1)

- **Hydrostor Agentic Access** — 26 operations

## Security (2)

- **Hydrostor Authentication** — http · 1 scheme
- **Hydrostor Domain Security** — TLSv1.3 · DMARC

## Plans (1)

- **Hydrostor Plans Pricing**

## Tags

Company, Energy, Energy Storage, Long Duration Energy Storage, Compressed Air Energy Storage, Grid Infrastructure, Renewable Energy, Clean Energy, Utilities, Climate Tech, Canada, Content

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