Crux website screenshot

Crux

Crux is a capital platform for the clean economy, connecting clean energy and manufacturing developers with buyers, lenders, and investors. Its marketplace facilitates the sale of transferable clean energy tax credits created under the Inflation Reduction Act, alongside debt capital markets, tax equity, and preferred equity solutions and advisory services. Crux pairs a transaction platform and secure data room with market intelligence drawn from tens of billions of dollars in deal data, serving project developers, manufacturers, tax credit buyers, banks, tax advisors, and legal teams. The company is backed by Andreessen Horowitz (a16z) and was added to the API Evangelist network as a portfolio lead. Crux operates a customer application but does not publish a public developer API or OpenAPI at this time.

Crux is profiled on the APIs.io network. Tagged areas include Company, Clean Energy, Climate Finance, Tax Credits, and Capital Markets.

Crux’s developer surface includes engineering blog, signup flow, support, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub
18.1/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
CompanyClean EnergyClimate FinanceTax CreditsCapital MarketsFintechEnergyMarketplaceSustainability

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 18.1/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 1.3 / 20
Commercial Clarity 10.0 / 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/crux: 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 2

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

Crux Domain Security

TLSv1.3 · HSTS

SECURITY

Crux Trust Center

SOC 2 Type 2

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp
SignUp

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Compliance
Compliance
 TrustCenter
TrustCenter

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: crux
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/crux.png
name: Crux
description: Crux is a capital platform for the clean economy, connecting clean energy and manufacturing developers with buyers,
  lenders, and investors. Its marketplace facilitates the sale of transferable clean energy tax credits created under the
  Inflation Reduction Act, alongside debt capital markets, tax equity, and preferred equity solutions and advisory services.
  Crux pairs a transaction platform and secure data room with market intelligence drawn from tens of billions of dollars in
  deal data, serving project developers, manufacturers, tax credit buyers, banks, tax advisors, and legal teams. The company
  is backed by Andreessen Horowitz (a16z) and was added to the API Evangelist network as a portfolio lead. Crux operates a
  customer application but does not publish a public developer API or OpenAPI at this time.
url: https://raw.githubusercontent.com/api-evangelist/crux/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Clean Energy
- Climate Finance
- Tax Credits
- Capital Markets
- Fintech
- Energy
- Marketplace
- Sustainability
apis: []
common:
- type: DomainSecurity
  url: security/crux-domain-security.yml
- type: Website
  url: https://www.crux.com/
- type: Blog
  url: https://www.crux.com/blog
- type: SignUp
  url: https://app.cruxclimate.com/login
- type: Support
  url: https://www.crux.com/contact
- type: TermsOfService
  url: https://www.crux.com/terms-of-service
- type: PrivacyPolicy
  url: https://www.crux.com/privacy-policy
- type: Compliance
  url: https://www.crux.com/security
- type: TrustCenter
  url: security/crux-trust-center.yml
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