# HilleVax

**Canonical:** https://apis.io/providers/hillevax/  
**Website:** https://www.hillevax.com  
**APIs profiled:** 0

HilleVax was a clinical-stage biopharmaceutical company focused on developing and commercializing novel vaccines, most notably HIL-214, a virus-like-particle based vaccine candidate aimed at preventing moderate-to-severe acute gastroenteritis caused by norovirus infection. The company was surfaced in the API Evangelist network as a portfolio company of Lightspeed Venture Partners. Enrichment probing found no developer program, no API, no developer portal, and no public API documentation of any kind, which is expected for a clinical-stage vaccine developer rather than a technology/API producer. The company's primary domain (hillevax.com) now redirects to xoma.com (XOMA Royalty), indicating HilleVax has been acquired and wound down as an independent operating company; XOMA Royalty itself was subsequently acquired by Ligand (closed July 2026). This profile is retained as a company/identity record with no API surface.

## 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, Biopharmaceutical, Vaccines, Life Sciences, Healthcare, Norovirus, Clinical Stage

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