Hydrostor

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.

🌐 Visit website 📡 Source on GitHub
35.4/100 thin ▬ flat Agent 28/100 agent aware Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0
9 APIs
CompanyEnergyEnergy StorageLong Duration Energy StorageCompressed Air Energy StorageGrid InfrastructureRenewable EnergyClean EnergyUtilitiesClimate TechCanadaContent

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0
Composite quality — 35.4/100 · thin
Contract Quality 12.5 / 21
Developer Ergonomics 2.7 / 17
Access Clarity 3.6 / 17
Operational Transparency 0.0 / 11
Contract Governance 1.7 / 10
Discoverability 6.3 / 9
Regulatory Posture 6.7 / 15
Agent readiness — 28/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 5 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Surface 0 / 5
Regulatory Posture applies to this provider. Its tags matched the Energy & Utilities regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
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/. 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. Want it done for you? Prioritized profiling — $2,500 →

APIs 9

Individual APIs this provider publishes, each with its own machine-readable definition.

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...

Scroll for all 9

Pricing Plans 1

Published pricing tiers and plan structures.

Hydrostor Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Hydrostor Rate Limits

0 limits

RATE LIMITS

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Hydrostor Authentication

http · 1 scheme

SECURITY

Hydrostor Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Hydrostor Agentic Access

26 operations

26 operations · 0 acting

AGENTIC

Resources

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt
 AgenticAccess
AgenticAccess
 AgentSkill
AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

ErrorCatalog
ErrorCatalog
 Conventions
Conventions
 DataModel
DataModel
 Conformance
Conformance
 Lifecycle
Lifecycle

Build 3

SDKs, sample code, and the tooling you integrate with

Examples
Examples
 ToolCrosswalk
ToolCrosswalk
 Packages
Packages

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Disclosure
Disclosure
 Authentication
Authentication

Learn 1

Tutorials, courses, talks, and written guidance

YouTube
YouTube

Operate 2

Status, limits, changes, and where to get help

Contact
Contact
 RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
 Plans
Plans

Company 7

The organization behind the API

Website
Website
 About
About
 Blog
Blog
 BlogRSS
BlogRSS
 Newsletter
Newsletter
 Careers
Careers
 LinkedIn
LinkedIn

Scroll for all 7

Other 5

Properties that don't map to a standard resource type

Team
Team
 Technology
Technology
 Projects
Projects
 MediaKit
MediaKit
 Suppliers
Suppliers

Source (apis.yml)

apis.yml Raw ↑ 
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.'
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:
  - 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
  - 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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