aid: sublime-systems
name: Sublime Systems
description: >-
  Sublime Systems is a Somerville, Massachusetts cement manufacturer spun out of MIT
  that makes Sublime Cement, a low-carbon replacement for ordinary portland cement.
  Its ambient-temperature electrochemical "refinery for rocks" process extracts reactive
  calcium and silicates from low-value rocks and industrial byproducts and blends them
  into an ASTM-compliant cement that drops into existing concrete mix designs and
  equipment. The company sells through general-contractor distribution partners and
  publishes no developer program, API, SDK or machine-readable contract of any kind.
url: https://raw.githubusercontent.com/api-evangelist/sublime-systems/refs/heads/main/apis.yml
image: https://sublime-systems.com/wp-content/uploads/2025/05/image-3.jpg
x-type: company
x-source: harvest:secondary-market
x-tier: stub
x-tier-reason: harvest
specificationVersion: '0.20'
created: '2026-09-18'
modified: '2026-09-18'
tags:
- Company
- Cement
- Construction Materials
- Climate Tech
- Decarbonization
- Manufacturing
- Electrochemistry
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://sublime-systems.com
- type: Blog
  url: https://sublime-systems.com/news/
- type: BlogRSS
  url: https://sublime-systems.com/feed/
- type: PrivacyPolicy
  url: https://sublime-systems.com/privacy-policy/
- type: Contact
  url: https://sublime-systems.com/build/
- type: LinkedIn
  url: https://www.linkedin.com/company/sublime-cement/
- type: Careers
  url: https://jobs.lever.co/SublimeSystems
- type: SecondaryMarket
  url: https://www.hiive.com/securities/sublime-systems-stock
- type: DomainSecurity
  url: security/sublime-systems-domain-security.yml
x-enrichment:
  date: '2026-09-18'
  status: minimal
  artifacts_added: 2
  pass: local-v3
x-coverage:
  state: none
  reason: not-a-software-company
  detail: >-
    Sublime Systems manufactures low-carbon cement sold through general-contractor
    distribution partners; sublime-systems.com is a WordPress marketing site with no
    developer section, and every OpenAPI, GraphQL, llms.txt, agent-card and
    /.well-known/ path probed on it returned 404.
  evidence:
  - url: https://sublime-systems.com/
    status: 200
  - url: https://sublime-systems.com/developers
    status: 404
  - url: https://sublime-systems.com/openapi.json
    status: 404
  - url: https://sublime-systems.com/.well-known/agent-card.json
    status: 404
  - url: https://sublime-systems.com/.well-known/security.txt
    status: 404
  checked: '2026-09-18'