Twelve

Twelve is a carbon transformation company that converts CO2, water, and renewable electricity into fuels and chemicals that serve as drop-in replacements for petroleum-based products. Its proprietary eManufacturing technology powers AirPlant One in Moses Lake, Washington, which produces E-Jet sustainable aviation fuel and E-Naphtha, while its eMade program partners with consumer brands on CO2-made materials. Investors include TPG, DCVC, Microsoft, Carbon Direct, Breakout Ventures, and the Chan Zuckerberg Initiative. Twelve publishes no public developer API, but its Wix-hosted site exposes an llms.txt and a live site MCP endpoint for agentic access.

Twelve is profiled on the APIs.io network. Tagged areas include Company, Carbon Transformation, Climate Tech, Sustainable Aviation Fuel, and Chemicals.

Twelve’s developer surface includes engineering blog, support, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub
11.3/100 emerging ▬ flat Agent 10/100 agent aware Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0
0 APIs 1 MCP Servers
CompanyCarbon TransformationClimate TechSustainable Aviation FuelChemicalsClean EnergyManufacturing

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0
Composite quality — 11.3/100 · emerging
Contract Quality 0.0 / 21
Developer Ergonomics 1.2 / 17
Access Clarity 3.6 / 17
Operational Transparency 0.0 / 11
Contract Governance 0.0 / 10
Discoverability 4.9 / 9
Regulatory Posture 2.8 / 15
Agent readiness — 10/100 · agent aware
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 12 / 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/twelve: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Site Visitor Assistant for site "Twelve | A World Made from Air"

MCP SERVER

Security Posture 1

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

Twelve Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

MCPServer
MCPServer
 LLMsTxt
LLMsTxt

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 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: twelve
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/twelve.png
name: Twelve
description: Twelve is a carbon transformation company that converts CO2, water, and renewable electricity into fuels and
  chemicals that serve as drop-in replacements for petroleum-based products. Its proprietary eManufacturing technology powers
  AirPlant One in Moses Lake, Washington, which produces E-Jet sustainable aviation fuel and E-Naphtha, while its eMade program
  partners with consumer brands on CO2-made materials. Investors include TPG, DCVC, Microsoft, Carbon Direct, Breakout Ventures,
  and the Chan Zuckerberg Initiative. Twelve publishes no public developer API, but its Wix-hosted site exposes an llms.txt
  and a live site MCP endpoint for agentic access.
url: https://raw.githubusercontent.com/api-evangelist/twelve/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- dcvc
- techstars
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Carbon Transformation
- Climate Tech
- Sustainable Aviation Fuel
- Chemicals
- Clean Energy
- Manufacturing
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.twelve.co/
- type: Blog
  url: https://www.twelve.co/catalyst
- type: Support
  url: https://www.twelve.co/contact
- type: PrivacyPolicy
  url: https://www.twelve.co/privacypolicy
- type: TermsOfService
  url: https://www.twelve.co/termsofservice
- type: MCPServer
  url: mcp/twelve-mcp.yml
- type: LLMsTxt
  url: llms/twelve-llms.txt
- type: DomainSecurity
  url: security/twelve-domain-security.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 4
  pass: local-v1