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 1 API on the APIs.io network. 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

18.3/100 emerging ▼ -5.1 Agent 12/100 agent aware Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-10-04 · rubric v0.23.0

1 API

Company Energy Energy Storage Long Duration Energy StorageCompressed Air Energy StorageGrid Infrastructure Renewable Energy Clean Energy Utilities Climate Tech Canada

Kin Score

Kin Score How this is scored →
scored 2026-10-04 · rubric v0.23.0

Composite quality — 18.3/100 · emerging

Contract Quality 1.4 / 21

Developer Ergonomics 4.4 / 17

Access Clarity 3.6 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.5 / 10

Discoverability 4.9 / 9

Regulatory Posture 3.1 / 15

Agent readiness — 12/100 · agent aware

Machine-Readable Contract 0 / 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 Well-Known Document 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.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

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

Hydrostor Website (WordPress REST)

The public WordPress REST API (wp-json) of the Hydrostor website at hydrostor.ca: the route index of the site's content management system, catalogued as one site surface rather ...

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

Conventions

DataModel

Conformance

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

About

Blog

BlogRSS

Newsletter

Careers

LinkedIn

Scroll for all 7

Other 5

Properties that don't map to a standard resource type

Team

Technology

Projects

MediaKit

Suppliers

Source (apis.yml)

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
apis:
- aid: hydrostor:hydrostor-ca-website-wordpress-rest
  name: Hydrostor Website (WordPress REST)
  description: 'The public WordPress REST API (wp-json) of the Hydrostor website at hydrostor.ca: the route index of the site''s
    content management system, catalogued as one site surface rather than as separate APIs.'
  baseURL: https://hydrostor.ca/wp-json
  tags:
  - WordPress
  x-surface: platform-generated
  properties:
  - type: Documentation
    url: https://hydrostor.ca/wp-json
  x-platform: wordpress
  x-platform-surface: rest
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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