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.
More than an index entry, but the surface is still mostly links rather than artifacts — the cohort most likely to move a full band from modest, well-targeted work.
API Evangelist profiles Bluejay Therapeutics the way a machine reads it — 16 machine-readable artifacts across 6 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Bluejay Therapeutics scores 26.1/100 (emerging), with a separate agent-readiness read of 30/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-08-17 · rubric v0.11.0
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How we profile Bluejay Therapeutics
Each block below is one kind of artifact we hold for Bluejay Therapeutics. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 6
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Bluejay Therapeutics Content API
Posts, pages and cross-content search.
Bluejay Therapeutics Discovery API
Route index and namespace discovery documents.
Bluejay Therapeutics Embed API
oEmbed 1.0 provider endpoint.
Bluejay Therapeutics Empty Collections API
Registered collections that answer 200 anonymously but currently hold no items.
Bluejay Therapeutics Media API
The site media library.
Bluejay Therapeutics Taxonomy API
Categories, tags and taxonomy/type/status registries.
Open Collections 7
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONBluejay Therapeutics Content API
OPEN COLLECTIONBluejay Therapeutics Content Discovery API
OPEN COLLECTIONBluejay Therapeutics Content Embed API
OPEN COLLECTIONBluejay Therapeutics Content Empty Collections API
OPEN COLLECTIONBluejay Therapeutics Content Media API
OPEN COLLECTIONBluejay Therapeutics Content Taxonomy API
OPEN COLLECTIONScroll within the panel for all 7 ·
Semantic Vocabularies 1
JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.
JSON-LD contexts and semantic vocabularies used across these APIs.
Security Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for Bluejay Therapeutics — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Agent Surfaces 3
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 6
Pagination, idempotency, versioning, errors, and events
Access & Security 2
Authentication, authorization, and security posture
Company 4
The organization behind the API
Other 5
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/bluejay-therapeutics · machine-readable index on apis.io
This is an independent, third-party profile of Bluejay Therapeutics, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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