Rondo Energy

Rondo Energy is an Alameda, California industrial decarbonization company led by CEO John O'Donnell that builds the Rondo Heat Battery (RHB), a thermal energy storage system that converts intermittent wind and solar electricity into heat stored in thousands of tons of refractory brick at temperatures up to 1,500C and returns it as continuous steam, thermal oil, superheated air, or combined heat and power at rated outputs from 2MWth to over 100MWth. The RHB is sold as a drop-in replacement for a fossil-fuel boiler, via capital purchase, lease, or heat purchase agreement, into cement, food and beverage, chemicals, fuels and ethanol, textiles, pulp and paper, mining, pharmaceuticals, and direct air capture. Rondo operates the world's largest industrial heat battery and has announced a 90GWh factory plan with Siam Cement Group, backed by Breakthrough Energy Ventures and Catalyst, Energy Impact Partners, Microsoft's Climate Innovation Fund, Rio Tinto, SABIC, Aramco Ventures, and the European Investment Bank. Rondo sells hardware and delivered heat, not software: it publishes no developer portal, API reference, or machine-readable specification.

Rondo Energy is profiled on the APIs.io network. Tagged areas include Company, Energy, Energy Storage, Thermal Energy Storage, and Industrial Heat.

Rondo Energy’s developer surface includes engineering blog, support, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub
14.7/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-08-17 · rubric v0.11.0
0 APIs
CompanyEnergyEnergy StorageThermal Energy StorageIndustrial HeatDecarbonizationClimate TechRenewable EnergyManufacturingHardware

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-17 · rubric v0.11.0
Composite quality — 14.7/100 · emerging
Contract Quality 0.0 / 21
Developer Ergonomics 1.1 / 17
Commercial Clarity 3.6 / 17
Operational Transparency 0.0 / 11
Governance 1.3 / 10
Discoverability 4.9 / 9
Regulatory Posture 3.9 / 15
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
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/rondo-energy: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

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

Rondo Energy Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance
Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy
PrivacyPolicy
 TermsOfService
TermsOfService

Company 3

The organization behind the API

Website
Website
 Blog
Blog
 LinkedIn
LinkedIn

Source (apis.yml)

apis.yml Raw ↑ 
aid: rondo-energy
name: Rondo Energy
description: 'Rondo Energy is an Alameda, California industrial decarbonization company led by CEO John O''Donnell that builds
  the Rondo Heat Battery (RHB), a thermal energy storage system that converts intermittent wind and solar electricity into
  heat stored in thousands of tons of refractory brick at temperatures up to 1,500C and returns it as continuous steam, thermal
  oil, superheated air, or combined heat and power at rated outputs from 2MWth to over 100MWth. The RHB is sold as a drop-in
  replacement for a fossil-fuel boiler, via capital purchase, lease, or heat purchase agreement, into cement, food and beverage,
  chemicals, fuels and ethanol, textiles, pulp and paper, mining, pharmaceuticals, and direct air capture. Rondo operates
  the world''s largest industrial heat battery and has announced a 90GWh factory plan with Siam Cement Group, backed by Breakthrough
  Energy Ventures and Catalyst, Energy Impact Partners, Microsoft''s Climate Innovation Fund, Rio Tinto, SABIC, Aramco Ventures,
  and the European Investment Bank. Rondo sells hardware and delivered heat, not software: it publishes no developer portal,
  API reference, or machine-readable specification.'
image: https://www.rondo.com/favicon.png
url: https://raw.githubusercontent.com/api-evangelist/rondo-energy/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-source-url: https://forgeglobal.com/rondo-energy_stock/
x-tier: stub
x-tier-reason: harvest
specificationVersion: '0.20'
created: '2026-08-05'
modified: '2026-08-05'
tags:
- Company
- Energy
- Energy Storage
- Thermal Energy Storage
- Industrial Heat
- Decarbonization
- Climate Tech
- Renewable Energy
- Manufacturing
- Hardware
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.rondo.com/
- type: Blog
  url: https://www.rondo.com/news-press
- type: Support
  url: https://www.rondo.com/contact
- type: PrivacyPolicy
  url: https://www.rondo.com/privacy-policy
- type: TermsOfService
  url: https://www.rondo.com/purchase-order-terms-conditions
- type: LinkedIn
  url: https://www.linkedin.com/company/rondo-energy/
- type: DomainSecurity
  url: security/rondo-energy-domain-security.yml
- type: Conformance
  url: conformance/rondo-energy-conformance.yml
- type: LLMsTxt
  url: llms/rondo-energy-llms.txt
x-enrichment:
  date: '2026-08-05'
  status: minimal
  artifacts_added: 4
  pass: local-v1
x-coverage:
  state: none
  reason: not-a-software-company
  detail: Rondo Energy sells a physical product - a refractory-brick industrial heat battery, bought outright, leased, or
    paid for as delivered steam - and its entire web surface is a 44-page Next.js marketing site plus a Jetty login portal;
    there is no developer section, no API host (api/developer/docs .rondo.com do not resolve), and the one identity host that
    exists, login.rondo.com, is an Okta custom domain whose TLS certificate does not match the name.
  evidence:
  - url: https://www.rondo.com/openapi.json
    status: 404
  - url: https://www.rondo.com/docs
    status: 404
  - url: https://www.rondo.com/llms.txt
    status: 404
  - url: https://www.rondo.com/.well-known/agent-card.json
    status: 404
  - url: https://portal.rondo.com/web/home
    status: 302
  - url: https://www.rondo.com/sitemap.xml
    status: 200
  checked: '2026-08-05'