# Calixa Therapeutics

**Canonical:** https://apis.io/providers/calixa-therapeutics/  
**APIs profiled:** 0

Calixa Therapeutics was a privately held, San Diego-based biopharmaceutical company focused on developing antibiotics to treat serious infections caused by multi-drug-resistant Gram-negative bacterial pathogens. Its lead compound, CXA-201 (later ceftolozane/tazobactam), was an intravenous therapy for serious hospital-acquired Gram-negative infections. Calixa was acquired by Cubist Pharmaceuticals in December 2009 for approximately $92.5 million (plus up to $310 million in milestone payments) and no longer operates as an independent company. It has no public developer or API surface. This profile exists in the API Evangelist network as a portfolio-lead stub associated with canaan-partners; there are no API artifacts to enrich because it is a defunct pharmaceutical company, not an API provider.

## Kin Score — 2.2 / 100 (minimal)

Scored 2026-08-21 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, Pharmaceuticals, Biotechnology, Antibiotics, Anti-Infectives, Drug Development, Life Sciences, Healthcare, Acquired

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