Bluejay Therapeutics

Bluejay Therapeutics, Inc. was a clinical-stage biopharmaceutical company headquartered in Redwood City, California, developing treatments for viral hepatitis and liver disease. Its lead asset, brelovitug (BJT-778), is an investigational monoclonal antibody targeting the surface antigen shared by the hepatitis D and hepatitis B viruses; it received U.S. FDA Breakthrough Therapy designation for chronic hepatitis delta and reported a 100% virologic response at week 48 in its Phase 2 monotherapy study before entering the AZURE-2 global Phase 3 trial. The company also advanced a proprietary TLR9 agonist (cavrotolimod), a liver-targeted HBV transcript inhibitor (BJT-628) and a liver-targeted fatty acid synthase inhibitor (BJT-188) toward a combination regimen aimed at functional cure of chronic hepatitis B. Mirum Pharmaceuticals agreed to acquire Bluejay Therapeutics in December 2025 and completed the acquisition on 26 January 2026; the corporate site now serves a single acquisition notice redirecting readers to mirumpharma.com. Bluejay Therapeutics never ran a developer program — no product API, no developer portal, no API documentation, no SDKs, no GitHub organisation and no package-registry presence. The only machine-readable surface reachable without credentials is the WordPress REST content API behind bluejaytx.com, catalogued here. That surface is notable for outliving the web site it belongs to: the marketing page tree was deleted in the teardown, but the REST API and the post archive still serve all 35 press releases and publication notices from 2021 through 2025 with full text.

Bluejay Therapeutics publishes 6 APIs on the APIs.io network, including Content API, Discovery API, Embed API, and 3 more. Tagged areas include Company, biopharmaceuticals, Pharmaceuticals, Life Sciences, and hepatology.

The Bluejay Therapeutics catalog on APIs.io includes 1 JSON-LD context.

Bluejay Therapeutics’ developer surface includes engineering blog, authentication, and 19 more developer resources.

🌐 Visit website 📡 Source on GitHub

16.3/100 emerging ▬ flat Agent 22/100 agent aware Full breakdown ↓
scored 2026-09-03 · rubric v0.18.2

6 APIs

Company biopharmaceuticals Pharmaceuticals Life ScienceshepatologyInfectious Disease Clinical Trials Drug Development Monoclonal Antibodies content-api

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Corporate Communications Management

BC-850

content

GET /wp/v2/posts

Kin Score

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

Composite quality — 16.3/100 · emerging

Contract Quality 3.4 / 21

Developer Ergonomics 2.7 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.5 / 10

Discoverability 6.9 / 9

Regulatory Posture 3.2 / 15

Agent readiness — 22/100 · 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 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 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/bluejay-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 Bluejay 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 6

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

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

Conformance

ErrorCatalog

Lifecycle

DataModel

JSONLD

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Company 4

The organization behind the API

Website

Website

Blog

Blog

BlogRSS

BlogRSS

LinkedIn

Other 6

Properties that don't map to a standard resource type

CapabilityMap

Overlay

Publications

Sitemap

Acquirer

SecondaryMarket

Source (apis.yml)

aid: bluejay-therapeutics
name: Bluejay Therapeutics
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-02'
  method: derived
image: https://bluejaytx.com/wp-content/uploads/2023/01/BluejayTx_Logo.png
description: 'Bluejay Therapeutics, Inc. was a clinical-stage biopharmaceutical company headquartered in Redwood City, California,
  developing treatments for viral hepatitis and liver disease. Its lead asset, brelovitug (BJT-778), is an investigational
  monoclonal antibody targeting the surface antigen shared by the hepatitis D and hepatitis B viruses; it received U.S. FDA
  Breakthrough Therapy designation for chronic hepatitis delta and reported a 100% virologic response at week 48 in its Phase
  2 monotherapy study before entering the AZURE-2 global Phase 3 trial. The company also advanced a proprietary TLR9 agonist
  (cavrotolimod), a liver-targeted HBV transcript inhibitor (BJT-628) and a liver-targeted fatty acid synthase inhibitor (BJT-188)
  toward a combination regimen aimed at functional cure of chronic hepatitis B. Mirum Pharmaceuticals agreed to acquire Bluejay
  Therapeutics in December 2025 and completed the acquisition on 26 January 2026; the corporate site now serves a single acquisition
  notice redirecting readers to mirumpharma.com. Bluejay Therapeutics never ran a developer program — no product API, no developer
  portal, no API documentation, no SDKs, no GitHub organisation and no package-registry presence. The only machine-readable
  surface reachable without credentials is the WordPress REST content API behind bluejaytx.com, catalogued here. That surface
  is notable for outliving the web site it belongs to: the marketing page tree was deleted in the teardown, but the REST API
  and the post archive still serve all 35 press releases and publication notices from 2021 through 2025 with full text.'
url: https://raw.githubusercontent.com/api-evangelist/bluejay-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: '2026-08-07'
modified: '2026-08-07'
tags:
- Company
- biopharmaceuticals
- Pharmaceuticals
- Life Sciences
- hepatology
- Infectious Disease
- Clinical Trials
- Drug Development
- Monoclonal Antibodies
- content-api
tags_raw:
- Company
- biopharmaceuticals
- pharmaceuticals
- life-sciences
- hepatology
- infectious-disease
- clinical-trials
- drug-development
- monoclonal-antibodies
- content-api
apis:
- aid: bluejay-therapeutics:bluejay-therapeutics-content-api
  name: Bluejay Therapeutics Content API
  description: Posts, pages and cross-content search.
  humanURL: https://developer.wordpress.org/rest-api/
  baseURL: https://bluejaytx.com/wp-json
  tags:
  - Content
  tags_raw:
  - content
  properties:
  - type: OpenAPI
    url: openapi/bluejay-therapeutics-content-api-openapi.yml
  - type: Authentication
    url: authentication/bluejay-therapeutics-authentication.yml
  - type: ErrorCatalog
    url: errors/bluejay-therapeutics-problem-types.yml
  - type: Conventions
    url: conventions/bluejay-therapeutics-conventions.yml
  - type: DataModel
    url: data-model/bluejay-therapeutics-data-model.yml
  - type: JSONLD
    url: json-ld/bluejay-therapeutics-json-ld.yml
- aid: bluejay-therapeutics:bluejay-therapeutics-discovery-api
  name: Bluejay Therapeutics Discovery API
  description: Route index and namespace discovery documents.
  humanURL: https://developer.wordpress.org/rest-api/
  baseURL: https://bluejaytx.com/wp-json
  tags:
  - Discovery
  tags_raw:
  - discovery
  properties:
  - type: OpenAPI
    url: openapi/bluejay-therapeutics-discovery-api-openapi.yml
  - type: Authentication
    url: authentication/bluejay-therapeutics-authentication.yml
  - type: ErrorCatalog
    url: errors/bluejay-therapeutics-problem-types.yml
  - type: Conventions
    url: conventions/bluejay-therapeutics-conventions.yml
  - type: DataModel
    url: data-model/bluejay-therapeutics-data-model.yml
  - type: JSONLD
    url: json-ld/bluejay-therapeutics-json-ld.yml
- aid: bluejay-therapeutics:bluejay-therapeutics-embed-api
  name: Bluejay Therapeutics Embed API
  description: oEmbed 1.0 provider endpoint.
  humanURL: https://developer.wordpress.org/rest-api/
  baseURL: https://bluejaytx.com/wp-json
  tags:
  - Embed
  tags_raw:
  - embed
  properties:
  - type: OpenAPI
    url: openapi/bluejay-therapeutics-embed-api-openapi.yml
  - type: Authentication
    url: authentication/bluejay-therapeutics-authentication.yml
  - type: ErrorCatalog
    url: errors/bluejay-therapeutics-problem-types.yml
  - type: Conventions
    url: conventions/bluejay-therapeutics-conventions.yml
  - type: DataModel
    url: data-model/bluejay-therapeutics-data-model.yml
  - type: JSONLD
    url: json-ld/bluejay-therapeutics-json-ld.yml
- aid: bluejay-therapeutics:bluejay-therapeutics-empty-collections-api
  name: Bluejay Therapeutics Empty Collections API
  description: Registered collections that answer 200 anonymously but currently hold no items.
  humanURL: https://developer.wordpress.org/rest-api/
  baseURL: https://bluejaytx.com/wp-json
  tags:
  - empty-collections
  properties:
  - type: OpenAPI
    url: openapi/bluejay-therapeutics-empty-collections-api-openapi.yml
  - type: Authentication
    url: authentication/bluejay-therapeutics-authentication.yml
  - type: ErrorCatalog
    url: errors/bluejay-therapeutics-problem-types.yml
  - type: Conventions
    url: conventions/bluejay-therapeutics-conventions.yml
  - type: DataModel
    url: data-model/bluejay-therapeutics-data-model.yml
  - type: JSONLD
    url: json-ld/bluejay-therapeutics-json-ld.yml
- aid: bluejay-therapeutics:bluejay-therapeutics-media-api
  name: Bluejay Therapeutics Media API
  description: The site media library.
  humanURL: https://developer.wordpress.org/rest-api/
  baseURL: https://bluejaytx.com/wp-json
  tags:
  - Media
  tags_raw:
  - media
  properties:
  - type: OpenAPI
    url: openapi/bluejay-therapeutics-media-api-openapi.yml
  - type: Authentication
    url: authentication/bluejay-therapeutics-authentication.yml
  - type: ErrorCatalog
    url: errors/bluejay-therapeutics-problem-types.yml
  - type: Conventions
    url: conventions/bluejay-therapeutics-conventions.yml
  - type: DataModel
    url: data-model/bluejay-therapeutics-data-model.yml
  - type: JSONLD
    url: json-ld/bluejay-therapeutics-json-ld.yml
- aid: bluejay-therapeutics:bluejay-therapeutics-taxonomy-api
  name: Bluejay Therapeutics Taxonomy API
  description: Categories, tags and taxonomy/type/status registries.
  humanURL: https://developer.wordpress.org/rest-api/
  baseURL: https://bluejaytx.com/wp-json
  tags:
  - Taxonomy
  tags_raw:
  - taxonomy
  properties:
  - type: OpenAPI
    url: openapi/bluejay-therapeutics-taxonomy-api-openapi.yml
  - type: Authentication
    url: authentication/bluejay-therapeutics-authentication.yml
  - type: ErrorCatalog
    url: errors/bluejay-therapeutics-problem-types.yml
  - type: Conventions
    url: conventions/bluejay-therapeutics-conventions.yml
  - type: DataModel
    url: data-model/bluejay-therapeutics-data-model.yml
  - type: JSONLD
    url: json-ld/bluejay-therapeutics-json-ld.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CapabilityMap
  url: capabilities/bluejay-therapeutics-capability-edges.yml
  name: Bluejay Therapeutics Business Capability Map
- type: Overlay
  url: overlays/bluejay-therapeutics-content-overlay.yaml
- type: Website
  url: https://bluejaytx.com/
- type: Blog
  url: https://bluejaytx.com/category/press-releases/
- type: BlogRSS
  url: https://bluejaytx.com/feed/
- type: Publications
  url: https://bluejaytx.com/category/publication/
- type: Sitemap
  url: https://bluejaytx.com/sitemap.xml
- type: LinkedIn
  url: https://www.linkedin.com/company/bluejay-therapeutics/
- type: Acquirer
  url: https://mirumpharma.com/
- type: SecondaryMarket
  url: https://forgeglobal.com/bluejay-therapeutics_stock/
- type: Authentication
  url: authentication/bluejay-therapeutics-authentication.yml
- type: Conventions
  url: conventions/bluejay-therapeutics-conventions.yml
- type: Conformance
  url: conformance/bluejay-therapeutics-conformance.yml
- type: ErrorCatalog
  url: errors/bluejay-therapeutics-problem-types.yml
- type: Lifecycle
  url: lifecycle/bluejay-therapeutics-lifecycle.yml
- type: DataModel
  url: data-model/bluejay-therapeutics-data-model.yml
- type: JSONLD
  url: json-ld/bluejay-therapeutics-json-ld.yml
- type: WellKnown
  url: well-known/bluejay-therapeutics-well-known.yml
- type: DomainSecurity
  url: security/bluejay-therapeutics-domain-security.yml
- type: LLMsTxt
  url: llms/bluejay-therapeutics-llms.txt
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-08-07'
  status: enriched
  artifacts_added: 14
  pass: local-v1

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Bluejay Therapeutics

What this lets a business do 1

Kin Score

APIs 6

Bluejay Therapeutics Content API

Bluejay Therapeutics Discovery API

Bluejay Therapeutics Embed API

Bluejay Therapeutics Empty Collections API

Bluejay Therapeutics Media API

Bluejay Therapeutics Taxonomy API

Open Collections 7

API Collection

Bluejay Therapeutics Content API

Bluejay Therapeutics Content Discovery API

Bluejay Therapeutics Content Embed API

Bluejay Therapeutics Content Empty Collections API

Bluejay Therapeutics Content Media API

Bluejay Therapeutics Content Taxonomy API

Semantic Vocabularies 1

Bluejay Therapeutics Organization Context

Security Posture 2

Bluejay Therapeutics Authentication

Bluejay Therapeutics Domain Security

Resources