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 1 API on the APIs.io network. 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

16.4/100 emerging ▬ flat Agent 4/100 human only Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

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 2026-09-25 · rubric v0.23.0

Composite quality — 16.4/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 3.9 / 17

Access Clarity 3.6 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.5 / 10

Discoverability 5.0 / 9

Regulatory Posture 2.9 / 15

Agent readiness — 4/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 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.

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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 →

APIs 1

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

Star Therapeutics Website (WordPress REST)

The public WordPress REST API (wp-json) of the Star Therapeutics website at star-therapeutics.com: the route index of the site's content management system, catalogued as one sit...

Open Collections 1

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

API Collection

OPEN COLLECTION

Security Posture 2

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

Star Therapeutics Authentication

0 schemes

SECURITY

Star Therapeutics Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

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-com-website-wordpress-rest
  name: Star Therapeutics Website (WordPress REST)
  description: 'The public WordPress REST API (wp-json) of the Star Therapeutics website at star-therapeutics.com: the route
    index of the site''s content management system, catalogued as one site surface rather than as separate APIs.'
  baseURL: https://star-therapeutics.com/wp-json
  tags:
  - WordPress
  x-surface: platform-generated
  properties:
  - type: Documentation
    url: https://star-therapeutics.com/wp-json
  x-platform: wordpress
  x-platform-surface: rest
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

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/star-therapeutics"

All providers

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

Every operation they expose

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

How their score was established

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