Retro Biosciences
Retro Biosciences is a Redwood City, California longevity biotechnology company founded in 2021 whose stated mission is to add ten years to healthy human lifespan. Its published preclinical pipeline spans RTR242, a small-molecule autophagy-flux booster aimed at Alzheimer's disease; RTR888, iPSC-derived microglial progenitors for CNS conditions; RTR890, iPSC-derived hematopoietic stem cells for blood disorders; AAV-delivered in vivo tissue reprogramming for osteoarthritis and age-related hearing loss; and AI-designed protein therapeutics, the last built on a 2025 collaboration with OpenAI on a protein-engineering model for reprogramming factors. Retro was seeded with $180M from Sam Altman and reported a $1.8B valuation in 2026. It is a therapeutics company rather than a software company: it operates a public GitHub organization of internal lab-automation and bioinformatics tooling, but publishes no API, SDK, developer portal or machine-readable contract of any kind.
Index entry only — little beyond a description and a link, and nothing machine-readable enough for an agent to act on without a human reading the site first.
API Evangelist profiles Retro Biosciences the way a machine reads it — 1 machine-readable artifact, 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 — Retro Biosciences scores 7.0/100 (minimal), with a separate agent-readiness read of 0/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Why this profile is thin
Retro Biosciences is a preclinical therapeutics developer whose products are drugs, not software; its entire published site is the seven URLs in its own sitemap.xml (home, science, pipeline, team, careers, blog, one post), and api., developer. and docs.retro.bio are Vercel wildcard records that answer DEPLOYMENT_NOT_FOUND rather than serving anything.
This is an honest zero, not a gap in our research. Retro Biosciences does not appear to expose an API, so there is nothing here for us to index and nothing for them to fix.
What we probed
https://www.retro.bio/sitemap.xml→ HTTP 200https://www.retro.bio/openapi.json→ HTTP 404https://www.retro.bio/.well-known/agent-card.json→ HTTP 404https://www.retro.bio/.well-known/security.txt→ HTTP 404https://api.retro.bio/openapi.json→ HTTP 404https://developer.retro.bio/→ HTTP 404https://docs.retro.bio/→ HTTP 404https://www.retro.bio/llms.txt→ HTTP 404
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
Put this on your own site. The badge is drawn live from Retro Biosciences's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.
<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/retro-biosciences/"
title="Retro Biosciences on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/retro-biosciences.svg"
alt="Retro Biosciences Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>[](https://providers.apievangelist.com/providers/retro-biosciences/)<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/retro-biosciences/"
title="Retro Biosciences on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/retro-biosciences/card.svg"
alt="Retro Biosciences Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile Retro Biosciences
Each block below is one kind of artifact we hold for Retro Biosciences. 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.
Security Posture 1
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 Retro Biosciences — 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 1
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 1
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Company 6
The organization behind the API
Other 3
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/retro-biosciences · machine-readable index on apis.io
This is an independent, third-party profile of Retro Biosciences, 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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you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.