Juvenescence
Juvenescence Limited is a clinical-stage, AI-enabled drug development company headquartered in Ramsey, Isle of Man, with operations in the United Kingdom, the United States and Abu Dhabi, founded by Jim Mellon, Dr Gregory Bailey and Dr Declan Doogan and led by CEO Dr Richard Marshall CBE. It develops medicines that target core mechanisms of aging in order to prevent rather than only treat age-related disease, working across small molecules, biologics and cell therapies. Its lead programme is the PAI-1 inhibitor MDI-2517, which completed a Phase 1 trial with a Phase 2 proof-of-concept study planned in metabolic and fibrotic disease, alongside a CD38 inhibitor programme run with the Buck Institute for Research on Aging. The company closed a $76m first tranche of Series B-1 financing led by Abu Dhabi's M42 in 2025 and acquired the AI drug-discovery company Ro5 Inc. in June 2025, bringing in the HydraScreen structure-based screening and ADMET modelling stack. Juvenescence has founded or capitalised a portfolio of longevity biotechs including LyGenesis, Napa Therapeutics, Souvien Therapeutics, Morphoceuticals, Relation Therapeutics, Chrysea Labs, Selah Therapeutics and BYOMass. Juvenescence runs no developer program and publishes no product API. The machine-readable surfaces it does expose are the anonymously readable WordPress REST content API behind juvlabs.com, a provider-published llms.txt, and the open-source HydraScreen and bio2d research code released under the Ro5-ai GitHub organisation.
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles Juvenescence the way a machine reads it — 13 machine-readable artifacts across 9 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 — Juvenescence scores 42.9/100 (developing), with a separate agent-readiness read of 35/100 (agent ready). 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 2026-08-24 · rubric v0.12.1
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title="Juvenescence on API Evangelist — API profile and Kin Score">
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How we profile Juvenescence
Each block below is one kind of artifact we hold for Juvenescence. 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 9
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.
Juvenescence Posts API
Juvenescence's news stream — 57 published posts across Press Releases, In the News, Juv on the Road, Publications and Videos — read from the WordPress REST content API behind ju...
Juvenescence Pages API
The 35 published corporate, science, pipeline, leadership-biography and policy pages of juvlabs.com, read from the WordPress REST content API.
Juvenescence Media API
The 466-item juvlabs.com media library — brand marks, leadership portraits, press and conference imagery — with per-item MIME type, source URL and generated size variants.
Juvenescence Categories API
The 7 post categories that organise the Juvenescence news stream, five of which carry posts.
Juvenescence Tags API
The 25 post tags on juvlabs.com, a vocabulary dominated by Juvenescence portfolio companies and research collaborators alongside a legacy consumer-nutrition set.
Juvenescence Comments API
The comments collection on juvlabs.com. Registered and anonymously readable, but empty — the site does not use comments.
Juvenescence Search API
Cross-content search over Juvenescence posts, pages, the portfolio type and taxonomy terms — the single best entry point for an agent that needs to find material without walking...
Juvenescence Portfolio API
The site's registered `portfolio` custom post type and its `portfolio_category` taxonomy. Registered, public and REST-exposed, but empty at derivation — Juvenescence's portfolio...
Juvenescence Discovery API
The juvlabs.com REST discovery surface — site index, `wp/v2` namespace route index with per-argument schemas, registered content types, taxonomies and statuses, plus oEmbed URL ...
Scroll within the panel for all 9 ·
Pricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Juvenescence Rate Limits
RATE LIMITSSecurity 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 Juvenescence — 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.
Documentation 3
Reference material describing how the API behaves
Agent Surfaces 2
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 5
Pagination, idempotency, versioning, errors, and events
Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 4
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 5
The organization behind the API
Other 8
Properties that don't map to a standard resource type
Scroll within the panel for all 8 ·
← All providers · Data indexed from github.com/api-evangelist/juvenescence · machine-readable index on apis.io
This is an independent, third-party profile of Juvenescence, 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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