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.
Hydrostor publishes 9 APIs on the APIs.io network, including Projects API, Posts API, Pages API, and 6 more. Tagged areas include Company, Energy, Energy Storage, Long Duration Energy Storage, and Compressed Air Energy Storage.
Hydrostor’s developer surface includes engineering blog, YouTube channel, authentication, code examples, and 28 more developer resources.
Regulatory Posture applies to this provider. Its tags matched the
Energy & Utilities regime, so
Regulatory Posture carries 15 points of the composite.
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provider repo — the
applicability map is public and we will correct it.
Create-or-Update Ergonomics does not apply to this provider. The published contracts declare
no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's
denominator entirely — not scored zero. A reference or data API is not deficient for being unable to
upsert.
The six quality facets above are damped to 85 points between them,
because the conditional facet above carries the other
15. That is why each facet's contribution is shown against a damped
maximum: raising a quality facet moves the composite by 85% of its nominal
weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/hydrostor: open an issue to ask a question, or submit a pull request to add artifacts.
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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...
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...
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...
Public, unauthenticated read access to the media library behind hydrostor.ca — project renders, facility and geology photography, technology diagrams and press assets, each with...
Public, unauthenticated read access to the classification vocabularies behind hydrostor.ca: newsroom categories and tags, plus the site-specific `project_category` and `project_...
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...
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...
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 ...
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...
aid: hydrostor
name: Hydrostor
description: '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.'
deliveryModel:
model: saas
open_source: false
commercial: true
callable_host: true
label: Hosted service · you call their endpoint
confidence: high
source:
- openapi
- pricing
generated: '2026-08-28'
method: derived
accessModel:
pricing: unknown
onboarding: unknown
trial: false
try_now: false
public: false
label: Unknown
confidence: low
source:
- authentication
- rate-limits
- security
generated: '2026-09-03'
method: derived
image: https://hydrostor.ca/wp-content/uploads/2026/06/cropped-HDS-Favicon-2026.png
url: https://raw.githubusercontent.com/api-evangelist/hydrostor/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.23'
created: '2026-08-22'
modified: '2026-08-22'
tags:
- Company
- Energy
- Energy Storage
- Long Duration Energy Storage
- Compressed Air Energy Storage
- Grid Infrastructure
- Renewable Energy
- Clean Energy
- Utilities
- Climate Tech
- Canada
- Content
apis:
- aid: hydrostor:hydrostor-projects-api
name: Hydrostor Projects API
description: 'Public, unauthenticated read access to Hydrostor''s Advanced Compressed Air Energy Storage project portfolio
— the site-specific `project` custom post type behind hydrostor.ca/projects/. Verified live at 6 published projects on
2026-08-22: the Goderich A-CAES Facility, Willow Rock, Silver City, Quinte, Wellington and Copper Valley Energy Storage
Centers. This is the one genuinely Hydrostor-specific resource on the surface.'
humanURL: https://hydrostor.ca/projects/
baseURL: https://hydrostor.ca/wp-json
tags:
- Project
- Energy Storage
- Content
tags_raw:
- Projects
- Energy Storage
- Content
properties:
- type: OpenAPI
url: openapi/hydrostor-projects-api-openapi.yml
- type: Overlay
url: overlays/hydrostor-projects-api-overlay.yaml
- type: Authentication
url: authentication/hydrostor-authentication.yml
- type: ErrorCatalog
url: errors/hydrostor-problem-types.yml
- type: Conventions
url: conventions/hydrostor-conventions.yml
- type: DataModel
url: data-model/hydrostor-data-model.yml
- type: Conformance
url: conformance/hydrostor-conformance.yml
- type: Lifecycle
url: lifecycle/hydrostor-lifecycle.yml
- type: Examples
url: examples/hydrostor-examples.yml
- aid: hydrostor:hydrostor-posts-api
name: Hydrostor Posts API
description: Public, unauthenticated read access to the Hydrostor newsroom archive — press releases, company insights and
featured media coverage — via the WordPress core REST API behind hydrostor.ca. Verified live at 172 published posts on
2026-08-22 across the Featured Coverage (96), Press Release (54) and Insights (24) categories.
humanURL: https://hydrostor.ca/media/
baseURL: https://hydrostor.ca/wp-json
tags:
- Posts
- News
- Content
properties:
- type: OpenAPI
url: openapi/hydrostor-posts-api-openapi.yml
- type: Overlay
url: overlays/hydrostor-posts-api-overlay.yaml
- type: Authentication
url: authentication/hydrostor-authentication.yml
- type: ErrorCatalog
url: errors/hydrostor-problem-types.yml
- type: Conventions
url: conventions/hydrostor-conventions.yml
- type: DataModel
url: data-model/hydrostor-data-model.yml
- type: Conformance
url: conformance/hydrostor-conformance.yml
- type: Lifecycle
url: lifecycle/hydrostor-lifecycle.yml
- type: Examples
url: examples/hydrostor-examples.yml
- aid: hydrostor:hydrostor-pages-api
name: Hydrostor Pages API
description: 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, careers, contact, media kit, newsletter signup, Privacy
Policy, Terms of Use and the California AB1305 climate disclosure. Verified live at 22 published pages on 2026-08-22.
humanURL: https://hydrostor.ca/
baseURL: https://hydrostor.ca/wp-json
tags:
- Pages
- Content
properties:
- type: OpenAPI
url: openapi/hydrostor-pages-api-openapi.yml
- type: Overlay
url: overlays/hydrostor-pages-api-overlay.yaml
- type: Authentication
url: authentication/hydrostor-authentication.yml
- type: ErrorCatalog
url: errors/hydrostor-problem-types.yml
- type: Conventions
url: conventions/hydrostor-conventions.yml
- type: DataModel
url: data-model/hydrostor-data-model.yml
- type: Conformance
url: conformance/hydrostor-conformance.yml
- type: Lifecycle
url: lifecycle/hydrostor-lifecycle.yml
- aid: hydrostor:hydrostor-media-api
name: Hydrostor Media API
description: Public, unauthenticated read access to the media library behind hydrostor.ca — project renders, facility and
geology photography, technology diagrams and press assets, each with its generated size variants and source URL. Verified
live at 736 attachments on 2026-08-22. This is the machine-readable counterpart to the human media kit.
humanURL: https://hydrostor.ca/media-kit/
baseURL: https://hydrostor.ca/wp-json
tags:
- Media
- Image
- Content
tags_raw:
- Media
- Images
- Content
properties:
- type: OpenAPI
url: openapi/hydrostor-media-api-openapi.yml
- type: Overlay
url: overlays/hydrostor-media-api-overlay.yaml
- type: Authentication
url: authentication/hydrostor-authentication.yml
- type: ErrorCatalog
url: errors/hydrostor-problem-types.yml
- type: Conventions
url: conventions/hydrostor-conventions.yml
- type: DataModel
url: data-model/hydrostor-data-model.yml
- type: Conformance
url: conformance/hydrostor-conformance.yml
- type: Lifecycle
url: lifecycle/hydrostor-lifecycle.yml
- aid: hydrostor:hydrostor-taxonomy-api
name: Hydrostor Taxonomy API
description: 'Public, unauthenticated read access to the classification vocabularies behind hydrostor.ca: newsroom categories
and tags, plus the site-specific `project_category` and `project_tag` taxonomies registered against the A-CAES project
portfolio. Verified live on 2026-08-22 at 4 newsroom categories and 0 terms in each of the other three.'
humanURL: https://hydrostor.ca/media/
baseURL: https://hydrostor.ca/wp-json
tags:
- Taxonomy
- Content
properties:
- type: OpenAPI
url: openapi/hydrostor-taxonomy-api-openapi.yml
- type: Overlay
url: overlays/hydrostor-taxonomy-api-overlay.yaml
- type: Authentication
url: authentication/hydrostor-authentication.yml
- type: ErrorCatalog
url: errors/hydrostor-problem-types.yml
- type: Conventions
url: conventions/hydrostor-conventions.yml
- type: DataModel
url: data-model/hydrostor-data-model.yml
- type: Conformance
url: conformance/hydrostor-conformance.yml
- type: Lifecycle
url: lifecycle/hydrostor-lifecycle.yml
- aid: hydrostor:hydrostor-search-api
name: Hydrostor Search API
description: 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, title, canonical URL, type and subtype. Verified live
at 200 searchable objects on 2026-08-22.
humanURL: https://hydrostor.ca/
baseURL: https://hydrostor.ca/wp-json
tags:
- Search
- Content
properties:
- type: OpenAPI
url: openapi/hydrostor-search-api-openapi.yml
- type: Overlay
url: overlays/hydrostor-search-api-overlay.yaml
- type: Authentication
url: authentication/hydrostor-authentication.yml
- type: ErrorCatalog
url: errors/hydrostor-problem-types.yml
- type: Conventions
url: conventions/hydrostor-conventions.yml
- type: Conformance
url: conformance/hydrostor-conformance.yml
- type: Lifecycle
url: lifecycle/hydrostor-lifecycle.yml
- aid: hydrostor:hydrostor-discovery-api
name: Hydrostor Discovery API
description: Public, unauthenticated discovery metadata for hydrostor.ca — the self-describing route index (340 routes across
18 namespaces at capture), the registered content types and taxonomies, the publication statuses, and the public author
records. This is the surface that makes the rest of the API machine-readable in the complete absence of any published
documentation.
humanURL: https://hydrostor.ca/wp-json/
baseURL: https://hydrostor.ca/wp-json
tags:
- Discovery
- Metadata
properties:
- type: OpenAPI
url: openapi/hydrostor-discovery-api-openapi.yml
- type: Overlay
url: overlays/hydrostor-discovery-api-overlay.yaml
- type: Authentication
url: authentication/hydrostor-authentication.yml
- type: ErrorCatalog
url: errors/hydrostor-problem-types.yml
- type: Conventions
url: conventions/hydrostor-conventions.yml
- type: Conformance
url: conformance/hydrostor-conformance.yml
- type: Lifecycle
url: lifecycle/hydrostor-lifecycle.yml
- aid: hydrostor:hydrostor-oembed-api
name: Hydrostor oEmbed API
description: 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 A-CAES project page. Requires no credentials.
humanURL: https://hydrostor.ca/wp-json/oembed/1.0/embed?url=https%3A%2F%2Fhydrostor.ca%2Ftechnology%2F
baseURL: https://hydrostor.ca/wp-json
tags:
- oEmbed
- Metadata
properties:
- type: OpenAPI
url: openapi/hydrostor-oembed-api-openapi.yml
- type: Overlay
url: overlays/hydrostor-oembed-api-overlay.yaml
- type: Authentication
url: authentication/hydrostor-authentication.yml
- type: ErrorCatalog
url: errors/hydrostor-problem-types.yml
- type: Conventions
url: conventions/hydrostor-conventions.yml
- type: Conformance
url: conformance/hydrostor-conformance.yml
- aid: hydrostor:hydrostor-seo-api
name: Hydrostor SEO Metadata API
description: 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 post, page and A-CAES project without scraping HTML.
humanURL: https://hydrostor.ca/wp-json/yoast/v1/get_head?url=https://hydrostor.ca/technology/
baseURL: https://hydrostor.ca/wp-json
tags:
- SEO
- Metadata
- JSON-LD
properties:
- type: OpenAPI
url: openapi/hydrostor-seo-api-openapi.yml
- type: Overlay
url: overlays/hydrostor-seo-api-overlay.yaml
- type: Authentication
url: authentication/hydrostor-authentication.yml
- type: ErrorCatalog
url: errors/hydrostor-problem-types.yml
- type: Conventions
url: conventions/hydrostor-conventions.yml
- type: Conformance
url: conformance/hydrostor-conformance.yml
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
- FN: APIs.json
email: info@apis.io
common:
- type: DomainSecurity
url: security/hydrostor-domain-security.yml
- type: Website
url: https://hydrostor.ca/
- type: About
url: https://hydrostor.ca/our-company/
- type: Team
url: https://hydrostor.ca/our-company/
- type: Technology
url: https://hydrostor.ca/technology/
- type: Projects
url: https://hydrostor.ca/projects/
- type: UseCases
url: https://hydrostor.ca/use-cases/
- type: Blog
url: https://hydrostor.ca/media/
- type: BlogRSS
url: https://hydrostor.ca/feed/
- type: Newsletter
url: https://hydrostor.ca/newsletter/
- type: MediaKit
url: https://hydrostor.ca/media-kit/
- type: Contact
url: https://hydrostor.ca/contact/
- type: Careers
url: https://hydrostor.ca/careers/
- type: Suppliers
url: https://hydrostor.ca/vendor-interest-form/
- type: TermsOfService
url: https://hydrostor.ca/terms-of-use/
- type: PrivacyPolicy
url: https://hydrostor.ca/privacy-policy/
- type: Disclosure
url: https://hydrostor.ca/ab1305-disclosure/
- type: LinkedIn
url: https://www.linkedin.com/company/hydrostor-inc-
- type: YouTube
url: https://www.youtube.com/@Hydrostor
- type: Authentication
url: authentication/hydrostor-authentication.yml
- type: ErrorCatalog
url: errors/hydrostor-problem-types.yml
- type: Conventions
url: conventions/hydrostor-conventions.yml
- type: DataModel
url: data-model/hydrostor-data-model.yml
- type: Conformance
url: conformance/hydrostor-conformance.yml
- type: Lifecycle
url: lifecycle/hydrostor-lifecycle.yml
- type: RateLimits
url: rate-limits/hydrostor-rate-limits.yml
- type: Plans
url: plans/hydrostor-plans-pricing.yml
- type: Examples
url: examples/hydrostor-examples.yml
- type: LLMsTxt
url: llms/hydrostor-llms.txt
- type: AgenticAccess
url: agentic-access/hydrostor-agentic-access.yml
- type: AgentSkill
url: skills/_index.yml
- type: ToolCrosswalk
url: mcp/hydrostor-tool-crosswalk.yml
- type: Packages
url: packages/hydrostor-packages.yml
x-enrichment:
date: '2026-08-22'
status: enriched
artifacts_added: 37
pass: local-v1
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