Sail Biomedicines

Sail Biomedicines is a Cambridge, Massachusetts preclinical biotechnology company created in October 2023 by Flagship Pioneering through the merger of Laronde and Senda Biosciences, and it is the company this profile's legacy `laronde` slug refers to. Sail combines Laronde's Endless RNA (eRNA) platform — synthetic circular RNA engineered to be translated persistently inside the body — with Senda's programmable lipid and natural nanoparticle delivery chemistry, and layers generative AI on the combined dataset to design what the company calls fully programmable medicines. Its lead effort is in vivo CAR-T for autoimmune disease: instructing a patient's own T cells to reprogram themselves inside the body rather than extracting, engineering and reinfusing them, an approach Sail markets as "immune reset". In July 2026 Johnson & Johnson committed $785 million up front (including a $465 million equity investment) plus up to $140 million in milestones and took an exclusive option to acquire the company for a further $2.58 billion. Sail sells therapeutics, not software: it publishes no API, no SDK, no machine-readable specification and no developer documentation, and it operates no public source-code organization.

Sail Biomedicines is profiled on the APIs.io network. Tagged areas include Company, Biotechnology, Pharmaceuticals, RNA, and Circular RNA.

Sail Biomedicines’ developer surface includes product news, engineering blog, and 16 more developer resources.

🌐 Visit website 📡 Source on GitHub

9.5/100 minimal ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0

0 APIs

Company Biotechnology Pharmaceuticals RNACircular RNACell TherapyCAR-TNanoparticles Drug Discovery Immunology Autoimmune Disease Life Sciences Artificial Intelligence Preclinical

Kin Score

Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0

Composite quality — 9.5/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.4 / 17

Access Clarity 3.6 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.3 / 9

Regulatory Posture 2.6 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 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 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/. This rating is computed from github.com/api-evangelist/laronde: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Pricing Plans 1

Published pricing tiers and plan structures.

Laronde Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 1

SDKs, sample code, and the tooling you integrate with

Packages

Packages

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Contact

Contact

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Plans

Plans

Company 9

The organization behind the API

Website

About

News

Blog

BlogRSS

Careers

LinkedIn

Twitter

Twitter

Investor

Investor

Scroll for all 9

Other 1

Properties that don't map to a standard resource type

SecondaryMarket

SecondaryMarket

Source (apis.yml)

aid: laronde
name: Sail Biomedicines
description: 'Sail Biomedicines is a Cambridge, Massachusetts preclinical biotechnology company created in October 2023 by
  Flagship Pioneering through the merger of Laronde and Senda Biosciences, and it is the company this profile''s legacy `laronde`
  slug refers to. Sail combines Laronde''s Endless RNA (eRNA) platform — synthetic circular RNA engineered to be translated
  persistently inside the body — with Senda''s programmable lipid and natural nanoparticle delivery chemistry, and layers
  generative AI on the combined dataset to design what the company calls fully programmable medicines. Its lead effort is
  in vivo CAR-T for autoimmune disease: instructing a patient''s own T cells to reprogram themselves inside the body rather
  than extracting, engineering and reinfusing them, an approach Sail markets as "immune reset". In July 2026 Johnson & Johnson
  committed $785 million up front (including a $465 million equity investment) plus up to $140 million in milestones and took
  an exclusive option to acquire the company for a further $2.58 billion. Sail sells therapeutics, not software: it publishes
  no API, no SDK, no machine-readable specification and no developer documentation, and it operates no public source-code
  organization.'
url: https://raw.githubusercontent.com/api-evangelist/laronde/refs/heads/main/apis.yml
image: https://www.sail.bio/wp-content/uploads/2024/05/sail-logo-primary-dark.svg
x-type: company
x-source: harvest:secondary-market
x-tier: profiled
x-tier-reason: enrichment-pipeline
specificationVersion: '0.23'
created: '2026-08-23'
modified: '2026-08-23'
tags:
- Company
- Biotechnology
- Pharmaceuticals
- RNA
- Circular RNA
- Cell Therapy
- CAR-T
- Nanoparticles
- Drug Discovery
- Immunology
- Autoimmune Disease
- Life Sciences
- Artificial Intelligence
- Preclinical
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/laronde-domain-security.yml
- type: Website
  url: https://www.sail.bio/
- type: About
  url: https://www.sail.bio/about-us/
- type: News
  url: https://www.sail.bio/news/
- type: Blog
  url: https://www.sail.bio/news/
- type: BlogRSS
  url: https://www.sail.bio/feed/
- type: Careers
  url: https://www.sail.bio/careers/
- type: Contact
  url: https://www.sail.bio/contact/
- type: TermsOfService
  url: https://www.sail.bio/terms-of-service/
- type: PrivacyPolicy
  url: https://www.sail.bio/privacy-policy/
- type: LinkedIn
  url: https://www.linkedin.com/company/sail-biomedicines
- type: Twitter
  url: https://twitter.com/SailBiomeds
- type: Investor
  url: https://www.flagshippioneering.com/companies/sail-biomedicines
- type: SecondaryMarket
  url: https://forgeglobal.com/laronde_stock/
- type: LLMsTxt
  url: llms/laronde-llms.txt
- type: Packages
  url: packages/laronde-packages.yml
- type: Plans
  url: plans/laronde-plans-pricing.yml
- type: RateLimits
  url: rate-limits/laronde-rate-limits.yml
x-enrichment:
  date: '2026-08-23'
  status: minimal
  artifacts_added: 6
  pass: local-v1
x-coverage:
  state: none
  reason: not-a-software-company
  detail: Sail Biomedicines (the company behind this profile's legacy `laronde` slug, formed when Flagship Pioneering merged
    Laronde and Senda Biosciences in October 2023) is a preclinical biopharmaceutical company whose product is an in vivo
    CAR-T drug pipeline, not software — www.sail.bio is a 14-page WordPress marketing site on WP Engine that returns an honest
    404 for every OpenAPI, GraphQL, llms.txt and /.well-known/ path, api./docs./developer./data./mcp. and every other developer
    subdomain are NXDOMAIN, and no package exists on npm, PyPI, RubyGems or crates.io; the site's only machine-readable surface
    is the stock WordPress core REST API at /wp-json/, which is the CMS, not a published API.
  evidence:
  - url: https://www.sail.bio/
    status: 200
  - url: https://www.sail.bio/openapi.json
    status: 404
  - url: https://www.sail.bio/graphql
    status: 404
  - url: https://www.sail.bio/llms.txt
    status: 404
  - url: https://www.sail.bio/.well-known/security.txt
    status: 404
  - url: https://www.sail.bio/.well-known/agent-card.json
    status: 404
  - url: https://www.sail.bio/wp-json/
    status: 200
  - url: https://pypi.org/pypi/sailbio/json
    status: 404
  checked: '2026-08-23'

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