Cullinet Software

Cullinet Software (formerly Cullinane Database Systems) was a database and application software company based in Westwood, Massachusetts, best known for the IDMS/IDMS-DB mainframe database management system, the IDD data dictionary, and the ADS/Online application development environment for IBM mainframes. Backed by Battery Ventures, Greylock, and Morgenthaler Ventures, it was one of the first software companies to go public (1978) and was acquired by Computer Associates (CA) on June 30, 1989. The company is defunct and publishes no developer portal, API, or documentation surface today; this record is retained as a historical portfolio-graph node with no enrichable API artifacts.

Cullinet Software is profiled on the APIs.io network. Tagged areas include Company, Database, Mainframe, Enterprise Software, and Application Development.

🌐 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

CompanyDatabaseMainframeEnterprise SoftwareApplication DevelopmentData ManagementDefunctHistorical

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

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Source (apis.yml)

aid: cullinet-software
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/cullinet-software.png
name: Cullinet Software
description: Cullinet Software (formerly Cullinane Database Systems) was a database and application software company based
  in Westwood, Massachusetts, best known for the IDMS/IDMS-DB mainframe database management system, the IDD data dictionary,
  and the ADS/Online application development environment for IBM mainframes. Backed by Battery Ventures, Greylock, and Morgenthaler
  Ventures, it was one of the first software companies to go public (1978) and was acquired by Computer Associates (CA) on
  June 30, 1989. The company is defunct and publishes no developer portal, API, or documentation surface today; this record
  is retained as a historical portfolio-graph node with no enrichable API artifacts.
url: https://raw.githubusercontent.com/api-evangelist/cullinet-software/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- battery-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Database
- Mainframe
- Enterprise Software
- Application Development
- Data Management
- Defunct
- Historical
x-status: defunct
x-acquired-by: computer-associates
x-acquired-date: '1989-06-30'
x-no-api-surface: true
apis: []
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