# Crescendo Bioscience

**Canonical:** https://apis.io/providers/crescendo-bioscience/  
**APIs profiled:** 0

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.

## Kin Score — 2.2 / 100 (minimal)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 2.2).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

Regulatory layer — **Health**: 0.0 (matched via tags).

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Tags

Company, Healthcare, Diagnostics, Molecular Diagnostics, Biotechnology, Life Sciences, Rheumatoid Arthritis

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/crescendo-bioscience/). Scores are computed from the provider's own public artifacts under a published rubric.