Kairos Power

Kairos Power is an Alameda, California-based advanced nuclear fission company developing the KP-FHR (Kairos Power Fluoride salt-cooled High-temperature Reactor), a Generation IV reactor design that uses TRISO (tri-structural isotropic) fuel pebbles cooled by molten fluoride salt (FLiBe) at low pressure and high temperature. Kairos Power is building Hermes, a low-power demonstration reactor at the East Tennessee Technology Park in Oak Ridge, Tennessee, which became the first non-light-water reactor authorized for construction by the U.S. Nuclear Regulatory Commission in over 50 years (construction permit issued December 2023). A second unit, Hermes 2, will pair two reactors with a 28 MWe electricity-generating turbine. In October 2024 Google signed a corporate power purchase agreement with Kairos Power for up to 500 MW of nuclear electricity from multiple small modular reactors, with the first deployment targeted by 2030 and additional capacity through 2035 — the first corporate PPA for new advanced nuclear in the United States. The company's revenue model is reactor sales, electricity PPAs, and federal cost-share partnerships (DOE Advanced Reactor Demonstration Program). Kairos Power is privately held, does not expose a public developer API or SDK, and operates under NRC regulatory oversight as a safety-critical nuclear licensee.

Kairos Power is profiled on the APIs.io network. Tagged areas include Nuclear, Advanced Nuclear, Nuclear Fission, Small Modular Reactor, and Generation IV.

Kairos Power’s developer surface includes product news, GitHub presence, YouTube channel, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

4.0/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Nuclear Advanced NuclearNuclear FissionSmall Modular ReactorGeneration IVKP-FHRFluoride SaltTRISO FuelHermes ReactorEnergy Clean Energy Power GenerationHyperscaler Power

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 4.0/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.6 / 11

Contract Governance 0.0 / 10

Discoverability 4.3 / 9

Regulatory Posture 1.2 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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

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/kairos-power: 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 →

Security Posture 1

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

Kairos Power Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub

GitHub

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Learn 1

Tutorials, courses, talks, and written guidance

YouTube

YouTube

Operate 1

Status, limits, changes, and where to get help

Contact

Contact

Company 5

The organization behind the API

Website

Website

News

News

Careers

Careers

LinkedIn

Twitter

Twitter

Other 4

Properties that don't map to a standard resource type

Technology

Hermes

Company

Team

Source (apis.yml)

aid: kairos-power
name: Kairos Power
description: Kairos Power is an Alameda, California-based advanced nuclear fission company developing the KP-FHR (Kairos Power
  Fluoride salt-cooled High-temperature Reactor), a Generation IV reactor design that uses TRISO (tri-structural isotropic)
  fuel pebbles cooled by molten fluoride salt (FLiBe) at low pressure and high temperature. Kairos Power is building Hermes,
  a low-power demonstration reactor at the East Tennessee Technology Park in Oak Ridge, Tennessee, which became the first
  non-light-water reactor authorized for construction by the U.S. Nuclear Regulatory Commission in over 50 years (construction
  permit issued December 2023). A second unit, Hermes 2, will pair two reactors with a 28 MWe electricity-generating turbine.
  In October 2024 Google signed a corporate power purchase agreement with Kairos Power for up to 500 MW of nuclear electricity
  from multiple small modular reactors, with the first deployment targeted by 2030 and additional capacity through 2035 —
  the first corporate PPA for new advanced nuclear in the United States. The company's revenue model is reactor sales, electricity
  PPAs, and federal cost-share partnerships (DOE Advanced Reactor Demonstration Program). Kairos Power is privately held,
  does not expose a public developer API or SDK, and operates under NRC regulatory oversight as a safety-critical nuclear
  licensee.
type: Index
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
position: Producing
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/kairos-power.png
tags:
- Nuclear
- Advanced Nuclear
- Nuclear Fission
- Small Modular Reactor
- Generation IV
- KP-FHR
- Fluoride Salt
- TRISO Fuel
- Hermes Reactor
- Energy
- Clean Energy
- Power Generation
- Hyperscaler Power
url: https://raw.githubusercontent.com/api-evangelist/kairos-power/refs/heads/main/apis.yml
created: '2026-05-24'
modified: '2026-05-24'
specificationVersion: '0.23'
apis: []
common:
- type: DomainSecurity
  url: security/kairos-power-domain-security.yml
- type: Website
  url: https://kairospower.com
- type: Technology
  url: https://kairospower.com/technology/
- type: Hermes
  url: https://kairospower.com/hermes/
- type: Company
  url: https://kairospower.com/about/
- type: Team
  url: https://kairospower.com/team/
- type: News
  url: https://kairospower.com/external_updates/
- type: Careers
  url: https://kairospower.com/careers/
- type: Contact
  url: https://kairospower.com/contact/
- type: GitHub
  url: https://github.com/Kairos-Power
- type: LinkedIn
  url: https://www.linkedin.com/company/kairos-power
- type: Twitter
  url: https://twitter.com/KairosPower
- type: YouTube
  url: https://www.youtube.com/@KairosPower
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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