Circularity Fuels website screenshot

Circularity Fuels

Circularity Fuels builds AI-controlled, mass-manufacturable reactors that turn waste carbon and cheap renewable power into drop-in hydrocarbons, starting with affordable sustainable aviation fuel (SAF). Its Ouro Reactor reforms waste carbon (methane and CO2 off-gassed by dairy farms, agricultural plants, and industrial facilities) into clean syngas, and its Aion Reactor uses next-generation Fischer-Tropsch synthesis to assemble that syngas into liquid fuels. The company is a portfolio company of DCVC and was added to the API Evangelist network as a company profile. It is a hardware and process company with no public developer API, SDK, or documentation surface at this time.

Circularity Fuels is profiled on the APIs.io network. Tagged areas include Company, Sustainable Aviation Fuel, Clean Energy, Carbon Capture, and Climate Tech.

🌐 Visit website 📡 Source on GitHub
6.8/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
CompanySustainable Aviation FuelClean EnergyCarbon CaptureClimate TechRenewable FuelsHardware

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 6.8/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 0.0 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 6.8 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
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
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/circularity-fuels: 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.

Circularity Fuels Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Contact
Contact

Company 2

The organization behind the API

Website
Website
 LinkedIn
LinkedIn

Source (apis.yml)

apis.yml Raw ↑ 
aid: circularity-fuels
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/circularity-fuels.png
name: Circularity Fuels
description: Circularity Fuels builds AI-controlled, mass-manufacturable reactors that turn waste carbon and cheap renewable
  power into drop-in hydrocarbons, starting with affordable sustainable aviation fuel (SAF). Its Ouro Reactor reforms waste
  carbon (methane and CO2 off-gassed by dairy farms, agricultural plants, and industrial facilities) into clean syngas, and
  its Aion Reactor uses next-generation Fischer-Tropsch synthesis to assemble that syngas into liquid fuels. The company is
  a portfolio company of DCVC and was added to the API Evangelist network as a company profile. It is a hardware and process
  company with no public developer API, SDK, or documentation surface at this time.
url: https://raw.githubusercontent.com/api-evangelist/circularity-fuels/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- dcvc
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Sustainable Aviation Fuel
- Clean Energy
- Carbon Capture
- Climate Tech
- Renewable Fuels
- Hardware
apis: []
common:
- type: DomainSecurity
  url: security/circularity-fuels-domain-security.yml
- type: Website
  url: https://circularityfuels.com/
- type: LinkedIn
  url: https://www.linkedin.com/company/circularity-fuels/
- type: Contact
  url: https://circularityfuels.com/contact.html
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence