aid: ansun-biopharma
name: Ansun Biopharma
description: 'Ansun Biopharma is a privately held, clinical-stage biopharmaceutical
  company headquartered in the Sorrento Valley district of San Diego, California, founded
  in 2003 by virologists and molecular biologists and led by CEO Dr. Nancy Chang. Rather
  than targeting viruses directly, Ansun develops host-directed immuno-biologic therapies
  built on a recombinant sialidase platform. Its lead candidate, DAS181 (Ansun-181),
  is a multi-function sialidase fusion protein that removes the sialic acid receptors
  respiratory viruses use to enter host cells, and has been studied in parainfluenza
  virus (PIV), severe influenza, human metapneumovirus and COVID-19 in immunocompromised
  and hospitalized patients. The company also advances earlier-stage programs in oncology
  and autoimmune disease from the same sialidase platform. Ansun is a drug developer,
  not a software vendor: it publishes a corporate WordPress site covering its pipeline,
  research and technologies, publications, intellectual property, investors, news and
  careers, and exposes no public API, SDK, developer portal or machine-readable specification.'
url: https://raw.githubusercontent.com/api-evangelist/ansun-biopharma/refs/heads/main/apis.yml
image: https://www.ansunbiopharma.com/wp-content/uploads/2020/06/ansun-bio-logo-3.png
x-type: company
x-source: harvest:secondary-market
x-tier: stub
x-tier-reason: harvest
specificationVersion: '0.23'
created: '2026-08-06'
modified: '2026-08-06'
tags:
- Company
- Biotechnology
- Biopharmaceutical
- Life Sciences
- Clinical Trials
- Antivirals
- Health
- Drug Development
- San Diego
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/ansun-biopharma-domain-security.yml
- type: LLMsTxt
  url: llms/ansun-biopharma-llms.txt
- type: Website
  url: https://www.ansunbiopharma.com/
- type: Blog
  url: https://www.ansunbiopharma.com/news/
- type: BlogRSS
  url: https://www.ansunbiopharma.com/feed/
- type: About
  url: https://www.ansunbiopharma.com/about/who-we-are/
- type: Contact
  url: https://www.ansunbiopharma.com/contact/
- type: Careers
  url: https://www.ansunbiopharma.com/careers/career-opportunities/
- type: Investors
  url: https://www.ansunbiopharma.com/investors/
- type: SecondaryMarket
  url: https://forgeglobal.com/ansun-biopharma_stock/
x-enrichment:
  date: '2026-08-06'
  status: minimal
  artifacts_added: 2
  pass: local-v1
x-coverage:
  state: none
  reason: not-a-software-company
  detail: Ansun Biopharma is a 25-person clinical-stage drug developer whose entire
    public site is a 24-page WordPress brochure about the DAS181 sialidase pipeline
    — there is no developer section, and every spec and .well-known path probed on
    ansunbiopharma.com returned 404 while api. and developer. subdomains do not resolve.
  evidence:
  - url: https://www.ansunbiopharma.com/developers
    status: 404
  - url: https://www.ansunbiopharma.com/openapi.json
    status: 404
  - url: https://www.ansunbiopharma.com/.well-known/agent-card.json
    status: 404
  - url: https://www.ansunbiopharma.com/sitemap.xml
    status: 200
  checked: '2026-08-06'