Calixa Therapeutics

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.

Calixa Therapeutics is profiled on the APIs.io network. Tagged areas include Company, Pharmaceuticals, Biotechnology, Antibiotics, and Anti-Infectives.

📡 Source on GitHub

0 APIs

Company Pharmaceuticals Biotechnology Antibiotics Anti-Infectives Drug Development Life Sciences Healthcare Acquired

Source (apis.yml)

aid: calixa-therapeutics
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
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/calixa-therapeutics.png
name: Calixa Therapeutics
description: 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.
url: https://raw.githubusercontent.com/api-evangelist/calixa-therapeutics/refs/heads/main/apis.yml
x-api-posture: no-product-api
x-api-posture-basis: observed
x-type: company
x-source: vc-portfolio
x-backed-by:
- canaan-partners
x-tier: stub
x-tier-reason: portfolio-lead
x-status: acquired
x-status-note: Acquired by Cubist Pharmaceuticals in December 2009; not an independent operating company and has no public
  API surface.
x-acquired-by: cubist-pharmaceuticals
x-acquired-date: '2009-12-16'
x-industry: pharmaceuticals
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Pharmaceuticals
- Biotechnology
- Antibiotics
- Anti-Infectives
- Drug Development
- Life Sciences
- Healthcare
- Acquired
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

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/calixa-therapeutics"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/calixa-therapeutics/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/calixa-therapeutics/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.