Zag Bio

Zag Bio is a clinical-stage biotechnology company developing thymus-targeted therapies for autoimmune diseases. The company engineers bifunctional antibodies that deliver self-antigens to antigen-presenting cells in the thymus, harnessing the body's natural process of central immune tolerance so developing immune cells learn to recognize, tolerate, and protect the body's own tissues. Its pipeline includes ZAG-101, a candidate for Type 1 Diabetes. Founded and incubated by Polaris Partners, Zag Bio launched publicly in October 2025 with an $80M Series A. It is tracked in the API Evangelist network as a Lightspeed Venture Partners portfolio company; as a therapeutics developer it publishes no public API or developer platform at this time.

Zag Bio is profiled on the APIs.io network. Tagged areas include Company, Biotechnology, Pharmaceuticals, Autoimmune, and Immunology.

Zag Bio’s developer surface includes engineering blog, support, and 3 more developer resources.

🌐 Visit website 📡 Source on GitHub
13.0/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
CompanyBiotechnologyPharmaceuticalsAutoimmuneImmunologyTherapeuticsDrug DevelopmentHealthcareVenture Backed

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 13.0/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 1.3 / 20
Commercial Clarity 4.2 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 6.8 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/zag-bio: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Resources

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: zag-bio
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/zag-bio.png
name: Zag Bio
description: Zag Bio is a clinical-stage biotechnology company developing thymus-targeted therapies for autoimmune diseases.
  The company engineers bifunctional antibodies that deliver self-antigens to antigen-presenting cells in the thymus, harnessing
  the body's natural process of central immune tolerance so developing immune cells learn to recognize, tolerate, and protect
  the body's own tissues. Its pipeline includes ZAG-101, a candidate for Type 1 Diabetes. Founded and incubated by Polaris
  Partners, Zag Bio launched publicly in October 2025 with an $80M Series A. It is tracked in the API Evangelist network as
  a Lightspeed Venture Partners portfolio company; as a therapeutics developer it publishes no public API or developer platform
  at this time.
url: https://raw.githubusercontent.com/api-evangelist/zag-bio/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- lightspeed-venture-partners
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Biotechnology
- Pharmaceuticals
- Autoimmune
- Immunology
- Therapeutics
- Drug Development
- Healthcare
- Venture Backed
apis: []
common:
- type: Website
  url: https://zagbio.com/
- type: Blog
  url: https://zagbio.com/news-resources/
- type: Support
  url: https://zagbio.com/contact/contact-us/
- type: TermsOfService
  url: https://zagbio.com/terms-of-use
- type: PrivacyPolicy
  url: https://zagbio.com/privacy-policy/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: minimal
  artifacts_added: 0
  pass: local-v1