Crescendo Bioscience

Crescendo Bioscience was a molecular-diagnostics company based in South San Francisco, known for Vectra DA (later Vectra), a multi-biomarker blood test that measures disease activity in rheumatoid arthritis. Backed by Kleiner Perkins and other venture investors, it was acquired by Myriad Genetics in 2014 and its diagnostic product now sits within Myriad. It has no independent public developer surface: no API, developer portal, documentation, or SDKs, and its former domains no longer resolve. Retained in the API Evangelist network as a VC-portfolio lead; no API artifacts apply.

Crescendo Bioscience is profiled on the APIs.io network. Tagged areas include Company, Healthcare, Diagnostics, Molecular Diagnostics, and Biotechnology.

🌐 Visit website 📡 Source on GitHub

5.7/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyHealthcareDiagnosticsMolecular DiagnosticsBiotechnologyLife SciencesRheumatoid Arthritis

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 5.7/100 · 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: crescendo-bioscience
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/crescendo-bioscience.png
name: Crescendo Bioscience
description: 'Crescendo Bioscience was a molecular-diagnostics company based in South San Francisco, known for Vectra DA (later
  Vectra), a multi-biomarker blood test that measures disease activity in rheumatoid arthritis. Backed by Kleiner Perkins
  and other venture investors, it was acquired by Myriad Genetics in 2014 and its diagnostic product now sits within Myriad.
  It has no independent public developer surface: no API, developer portal, documentation, or SDKs, and its former domains
  no longer resolve. Retained in the API Evangelist network as a VC-portfolio lead; no API artifacts apply.'
url: https://raw.githubusercontent.com/api-evangelist/crescendo-bioscience/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- kleiner-perkins
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
x-status: acquired
x-acquired-by: myriad-genetics
x-acquired-year: 2014
x-developer-surface: none
tags:
- Company
- Healthcare
- Diagnostics
- Molecular Diagnostics
- Biotechnology
- Life Sciences
- Rheumatoid Arthritis
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