Star Therapeutics

Star Therapeutics is a clinical-stage biotechnology company headquartered at 201 Haskins Way in South San Francisco, California, that transforms the lives of patients with serious diseases by discovering and developing best-in-class antibody therapies, with an initial focus on hematology and immunology. It operates a hub-and-spoke model, building a family of companies that each pursue a distinct area of novel biology, and it develops each programme under a pipeline-in-a-product strategy in which a single antibody is advanced across multiple related indications rather than one. The company emerged from stealth in February 2022 having raised $100 million since inception, added a $90 million round in September 2023, and closed an oversubscribed $125 million Series D in September 2025 to move its lead asset into a registrational programme. Its two named spokes are Vega Therapeutics, whose VGA039 is a first-in-class monoclonal antibody against Protein S developed as a subcutaneous therapy for von Willebrand disease and other bleeding disorders, and Electra Therapeutics, which targets SIRP proteins with ELA-026 in secondary hemophagocytic lymphohistiocytosis. VGA039 has received FDA Orphan Drug, Fast Track, Rare Pediatric Disease and Breakthrough Therapy designations; Incyte completed its acquisition of Vega Therapeutics, a wholly owned subsidiary of Star Therapeutics, in July 2026. Star Therapeutics runs no developer program and publishes no product API, developer portal, or API documentation. The only machine-readable surface reachable without credentials is the WordPress REST content API behind star-therapeutics.com, catalogued here.

Star Therapeutics publishes 9 APIs on the APIs.io network, including Comments API, Custom Types API, Discovery API, and 6 more. Tagged areas include Company, Biotechnology, Pharmaceuticals, Hematology, and Immunology.

Star Therapeutics’ developer surface includes product news, authentication, and 23 more developer resources.

🌐 Visit website 📡 Source on GitHub

36.7/100 thin ▬ flat Agent 28/100 agent aware saas Full breakdown ↓
scored 2026-09-03 · rubric v0.18.2

AccessOpen

1 APIs

Company Biotechnology Pharmaceuticals Hematology Immunology Rare Disease Antibody Therapeutics Clinical Trials Life Sciences content-api

Kin Score

Kin Score How this is scored →
scored 2026-09-03 · rubric v0.18.2

Composite quality — 36.7/100 · thin

Contract Quality 11.3 / 21

Developer Ergonomics 2.3 / 17

Access Clarity 9.7 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.5 / 10

Discoverability 5.8 / 9

Regulatory Posture 4.7 / 15

Agent readiness — 28/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Surface 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Health regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/star-therapeutics: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Something on this page wrong about Star Therapeutics? Report it → Free, always, and read by a human — corrections are worked from the queue daily. Agents can file the same report through the report_correction tool on the apis.io MCP.

APIs 9

Individual APIs this provider publishes, each with its own machine-readable definition.

Open Collections 10

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

Conformance

ErrorCatalog

Lifecycle

DataModel

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 6

The organization behind the API

Website

About

News

BlogRSS

Careers

LinkedIn

Other 7

Properties that don't map to a standard resource type

Overlay

Leadership

PatientResources

ConsumerHealth

SubsidiaryCompany

SubsidiaryCompany

SubsidiaryCompany

SubsidiaryCompany

SecondaryMarket

SecondaryMarket

Scroll for all 7

Source (apis.yml)

aid: star-therapeutics
name: Star Therapeutics
description: Star Therapeutics is a clinical-stage biotechnology company headquartered at 201 Haskins Way in South San Francisco,
  California, that transforms the lives of patients with serious diseases by discovering and developing best-in-class antibody
  therapies, with an initial focus on hematology and immunology. It operates a hub-and-spoke model, building a family of companies
  that each pursue a distinct area of novel biology, and it develops each programme under a pipeline-in-a-product strategy
  in which a single antibody is advanced across multiple related indications rather than one. The company emerged from stealth
  in February 2022 having raised $100 million since inception, added a $90 million round in September 2023, and closed an
  oversubscribed $125 million Series D in September 2025 to move its lead asset into a registrational programme. Its two named
  spokes are Vega Therapeutics, whose VGA039 is a first-in-class monoclonal antibody against Protein S developed as a subcutaneous
  therapy for von Willebrand disease and other bleeding disorders, and Electra Therapeutics, which targets SIRP proteins with
  ELA-026 in secondary hemophagocytic lymphohistiocytosis. VGA039 has received FDA Orphan Drug, Fast Track, Rare Pediatric
  Disease and Breakthrough Therapy designations; Incyte completed its acquisition of Vega Therapeutics, a wholly owned subsidiary
  of Star Therapeutics, in July 2026. Star Therapeutics runs no developer program and publishes no product API, developer
  portal, or API documentation. The only machine-readable surface reachable without credentials is the WordPress REST content
  API behind star-therapeutics.com, catalogued here.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: open
  trial: false
  try_now: false
  public: true
  label: Open access
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-02'
  method: derived
image: https://star-therapeutics.com/wp-content/uploads/2022/02/Group-6210.png
url: https://raw.githubusercontent.com/api-evangelist/star-therapeutics/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-tier: profiled
x-tier-reason: enriched
specificationVersion: '0.23'
created: '2026-08-05'
modified: '2026-08-05'
tags:
- Company
- Biotechnology
- Pharmaceuticals
- Hematology
- Immunology
- Rare Disease
- Antibody Therapeutics
- Clinical Trials
- Life Sciences
- content-api
tags_raw:
- Company
- biotechnology
- pharmaceuticals
- hematology
- immunology
- rare-disease
- antibody-therapeutics
- clinical-trials
- life-sciences
- content-api
apis:
- aid: star-therapeutics:star-therapeutics-comments-api
  name: Star Therapeutics Comments API
  description: Comment collection. Registered and reachable, but empty — no post on this deployment carries comments.
  humanURL: https://developer.wordpress.org/rest-api/
  baseURL: https://star-therapeutics.com/wp-json
  tags:
  - Comments
  tags_raw:
  - comments
  properties:
  - type: OpenAPI
    url: openapi/star-therapeutics-comments-api-openapi.yml
  - type: Authentication
    url: authentication/star-therapeutics-authentication.yml
  - type: ErrorCatalog
    url: errors/star-therapeutics-problem-types.yml
  - type: Conventions
    url: conventions/star-therapeutics-conventions.yml
  - type: DataModel
    url: data-model/star-therapeutics-data-model.yml
- aid: star-therapeutics:star-therapeutics-custom-types-api
  name: Star Therapeutics Custom Types API
  description: Avada theme custom post types (avada_faq, avada_portfolio). Registered and anonymously reachable, but both
    report zero published items.
  humanURL: https://developer.wordpress.org/rest-api/
  baseURL: https://star-therapeutics.com/wp-json
  tags:
  - custom-types
  properties:
  - type: OpenAPI
    url: openapi/star-therapeutics-custom-types-api-openapi.yml
  - type: Authentication
    url: authentication/star-therapeutics-authentication.yml
  - type: ErrorCatalog
    url: errors/star-therapeutics-problem-types.yml
  - type: Conventions
    url: conventions/star-therapeutics-conventions.yml
  - type: DataModel
    url: data-model/star-therapeutics-data-model.yml
- aid: star-therapeutics:star-therapeutics-discovery-api
  name: Star Therapeutics Discovery API
  description: Route, type, taxonomy and status discovery documents.
  humanURL: https://developer.wordpress.org/rest-api/
  baseURL: https://star-therapeutics.com/wp-json
  tags:
  - Discovery
  tags_raw:
  - discovery
  properties:
  - type: OpenAPI
    url: openapi/star-therapeutics-discovery-api-openapi.yml
  - type: Authentication
    url: authentication/star-therapeutics-authentication.yml
  - type: ErrorCatalog
    url: errors/star-therapeutics-problem-types.yml
  - type: Conventions
    url: conventions/star-therapeutics-conventions.yml
  - type: DataModel
    url: data-model/star-therapeutics-data-model.yml
- aid: star-therapeutics:star-therapeutics-media-api
  name: Star Therapeutics Media API
  description: Media library (661 attachments at harvest time).
  humanURL: https://developer.wordpress.org/rest-api/
  baseURL: https://star-therapeutics.com/wp-json
  tags:
  - Media
  tags_raw:
  - media
  properties:
  - type: OpenAPI
    url: openapi/star-therapeutics-media-api-openapi.yml
  - type: Authentication
    url: authentication/star-therapeutics-authentication.yml
  - type: ErrorCatalog
    url: errors/star-therapeutics-problem-types.yml
  - type: Conventions
    url: conventions/star-therapeutics-conventions.yml
  - type: DataModel
    url: data-model/star-therapeutics-data-model.yml
- aid: star-therapeutics:star-therapeutics-oembed-api
  name: Star Therapeutics Oembed API
  description: oEmbed 1.0 provider endpoint for star-therapeutics.com URLs.
  humanURL: https://developer.wordpress.org/rest-api/
  baseURL: https://star-therapeutics.com/wp-json
  tags:
  - oEmbed
  tags_raw:
  - oembed
  properties:
  - type: OpenAPI
    url: openapi/star-therapeutics-oembed-api-openapi.yml
  - type: Authentication
    url: authentication/star-therapeutics-authentication.yml
  - type: ErrorCatalog
    url: errors/star-therapeutics-problem-types.yml
  - type: Conventions
    url: conventions/star-therapeutics-conventions.yml
  - type: DataModel
    url: data-model/star-therapeutics-data-model.yml
- aid: star-therapeutics:star-therapeutics-pages-api
  name: Star Therapeutics Pages API
  description: Corporate pages (11 published at harvest time).
  humanURL: https://developer.wordpress.org/rest-api/
  baseURL: https://star-therapeutics.com/wp-json
  tags:
  - Pages
  tags_raw:
  - pages
  properties:
  - type: OpenAPI
    url: openapi/star-therapeutics-pages-api-openapi.yml
  - type: Authentication
    url: authentication/star-therapeutics-authentication.yml
  - type: ErrorCatalog
    url: errors/star-therapeutics-problem-types.yml
  - type: Conventions
    url: conventions/star-therapeutics-conventions.yml
  - type: DataModel
    url: data-model/star-therapeutics-data-model.yml
- aid: star-therapeutics:star-therapeutics-posts-api
  name: Star Therapeutics Posts API
  description: News archive — press releases, news coverage and scientific presentations (28 published at harvest time).
  humanURL: https://developer.wordpress.org/rest-api/
  baseURL: https://star-therapeutics.com/wp-json
  tags:
  - Posts
  tags_raw:
  - posts
  properties:
  - type: OpenAPI
    url: openapi/star-therapeutics-posts-api-openapi.yml
  - type: Authentication
    url: authentication/star-therapeutics-authentication.yml
  - type: ErrorCatalog
    url: errors/star-therapeutics-problem-types.yml
  - type: Conventions
    url: conventions/star-therapeutics-conventions.yml
  - type: DataModel
    url: data-model/star-therapeutics-data-model.yml
- aid: star-therapeutics:star-therapeutics-search-api
  name: Star Therapeutics Search API
  description: Cross-content search across published objects.
  humanURL: https://developer.wordpress.org/rest-api/
  baseURL: https://star-therapeutics.com/wp-json
  tags:
  - Search
  tags_raw:
  - search
  properties:
  - type: OpenAPI
    url: openapi/star-therapeutics-search-api-openapi.yml
  - type: Authentication
    url: authentication/star-therapeutics-authentication.yml
  - type: ErrorCatalog
    url: errors/star-therapeutics-problem-types.yml
  - type: Conventions
    url: conventions/star-therapeutics-conventions.yml
  - type: DataModel
    url: data-model/star-therapeutics-data-model.yml
- aid: star-therapeutics:star-therapeutics-taxonomy-api
  name: Star Therapeutics Taxonomy API
  description: Categories and tags. Five categories are registered; the post_tag taxonomy is registered but empty.
  humanURL: https://developer.wordpress.org/rest-api/
  baseURL: https://star-therapeutics.com/wp-json
  tags:
  - Taxonomy
  tags_raw:
  - taxonomy
  properties:
  - type: OpenAPI
    url: openapi/star-therapeutics-taxonomy-api-openapi.yml
  - type: Authentication
    url: authentication/star-therapeutics-authentication.yml
  - type: ErrorCatalog
    url: errors/star-therapeutics-problem-types.yml
  - type: Conventions
    url: conventions/star-therapeutics-conventions.yml
  - type: DataModel
    url: data-model/star-therapeutics-data-model.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Overlay
  url: overlays/star-therapeutics-content-overlay.yaml
- type: Website
  url: https://star-therapeutics.com/
- type: About
  url: https://star-therapeutics.com/our-approach/
- type: Leadership
  url: https://star-therapeutics.com/our-leadership/
- type: News
  url: https://star-therapeutics.com/news/
- type: BlogRSS
  url: https://star-therapeutics.com/feed/
- type: Careers
  url: https://star-therapeutics.com/our-careers/
- type: PatientResources
  url: https://star-therapeutics.com/share-your-story/
- type: ConsumerHealth
  url: https://star-therapeutics.com/consumer-health-us/
- type: PrivacyPolicy
  url: https://star-therapeutics.com/privacy-policy/
- type: TermsOfService
  url: https://star-therapeutics.com/terms-of-use/
- type: LinkedIn
  url: https://www.linkedin.com/company/star-tx
- type: SubsidiaryCompany
  url: https://vegatherapeutics.com/
- type: SubsidiaryCompany
  url: https://electra-therapeutics.com/
- type: SecondaryMarket
  url: https://forgeglobal.com/star-therapeutics_stock/
- type: Authentication
  url: authentication/star-therapeutics-authentication.yml
- type: Conventions
  url: conventions/star-therapeutics-conventions.yml
- type: Conformance
  url: conformance/star-therapeutics-conformance.yml
- type: ErrorCatalog
  url: errors/star-therapeutics-problem-types.yml
- type: Lifecycle
  url: lifecycle/star-therapeutics-lifecycle.yml
- type: DataModel
  url: data-model/star-therapeutics-data-model.yml
- type: WellKnown
  url: well-known/star-therapeutics-well-known.yml
- type: DomainSecurity
  url: security/star-therapeutics-domain-security.yml
- type: LLMsTxt
  url: llms/star-therapeutics-llms.txt
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-08-05'
  status: enriched
  artifacts_added: 15
  pass: local-v1

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Star Therapeutics

Kin Score

APIs 9

Star Therapeutics Comments API

Star Therapeutics Custom Types API

Star Therapeutics Discovery API

Star Therapeutics Media API

Star Therapeutics Oembed API

Star Therapeutics Pages API

Star Therapeutics Posts API

Star Therapeutics Search API

Star Therapeutics Taxonomy API

Open Collections 10

API Collection

Star Therapeutics Content Comments API

Star Therapeutics Content Custom Types API

Star Therapeutics Content Discovery API

Star Therapeutics Content Media API

Star Therapeutics Content Oembed API

Star Therapeutics Content Pages API

Star Therapeutics Content Posts API

Star Therapeutics Content Search API

Star Therapeutics Content Taxonomy API

Security Posture 2

Star Therapeutics Authentication

Star Therapeutics Domain Security

Resources