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.

30.9/100 thin ▬ flat Agent 36/100 agent ready Full breakdown ↓
scored 2026-08-12 · rubric v0.11.0
9 APIs
Companybiotechnologypharmaceuticalshematologyimmunologyrare-diseaseantibody-therapeuticsclinical-trialslife-sciencescontent-api

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-12 · rubric v0.11.0
Composite quality — 30.9/100 · thin
Contract Quality 12.4 / 21
Developer Ergonomics 2.1 / 17
Commercial Clarity 3.6 / 17
Operational Transparency 0.0 / 11
Governance 1.2 / 10
Discoverability 6.9 / 9
Regulatory Posture 4.7 / 15
Agent readiness — 36/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 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 0 / 4
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/. 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. Want it done for you? Prioritized profiling — $2,500 →

APIs 9

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

Star Therapeutics Comments API

Comment collection. Registered and reachable, but empty — no post on this deployment carries comments.

Star Therapeutics Custom Types API

Avada theme custom post types (avada_faq, avada_portfolio). Registered and anonymously reachable, but both report zero published items.

Star Therapeutics Discovery API

Route, type, taxonomy and status discovery documents.

Star Therapeutics Media API

Media library (661 attachments at harvest time).

Star Therapeutics Oembed API

oEmbed 1.0 provider endpoint for star-therapeutics.com URLs.

Star Therapeutics Pages API

Corporate pages (11 published at harvest time).

Star Therapeutics Posts API

News archive — press releases, news coverage and scientific presentations (28 published at harvest time).

Star Therapeutics Search API

Cross-content search across published objects.

Star Therapeutics Taxonomy API

Categories and tags. Five categories are registered; the post_tag taxonomy is registered but empty.

Scroll for all 9

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Star Therapeutics Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Access & Security 2

Authentication, authorization, and security posture

Commercial 2

Pricing, plans, and the legal terms of use

Company 6

The organization behind the API

Other 7

Properties that don't map to a standard resource type

Scroll for all 7

Source (apis.yml)

apis.yml Raw ↑
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.
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: '0.20'
created: '2026-08-05'
modified: '2026-08-05'
tags:
- 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
  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
  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
  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
  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
  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
  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
  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
  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