Rallybio

Rallybio Corporation (NASDAQ RLYB) is a clinical-stage biotechnology company headquartered in New Haven, Connecticut, founded in 2018, developing and commercializing life-transforming therapies for patients with severe and rare diseases. Its pipeline spans maternal-fetal health, complement dysregulation, hematology, and metabolic disorders, led by RLYB116, a differentiated complement component 5 (C5) inhibitor, and RLYB332, a long-acting matriptase-2 (MTP-2) antibody for iron-overload disorders. The company was surfaced as a portfolio company of Canaan Partners and added to the API Evangelist network. As a pharmaceutical company it publishes no public developer API, SDK, or machine-readable API surface; this profile captures corporate identity only.

Rallybio is profiled on the APIs.io network. Tagged areas include Company, Biotechnology, Pharmaceuticals, Rare Diseases, and Healthcare.

Rallybio’s developer surface includes engineering blog, support, and 4 more developer resources.

🌐 Visit website 📡 Source on GitHub

9.1/100 minimal ▬ flat Agent 0/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Biotechnology Pharmaceuticals Rare Diseases Healthcare Life Sciences Clinical Stage

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 9.1/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 1.0 / 17

Access Clarity 3.6 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.3 / 9

Regulatory Posture 1.5 / 15

Agent readiness — 0/100 · 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 0 / 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 Well-Known Document 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.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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/rallybio: 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 →

Resources

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 3

The organization behind the API

Website

Website

About

About

Blog

Blog

Source (apis.yml)

aid: rallybio
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/rallybio.png
name: Rallybio
description: Rallybio Corporation (NASDAQ RLYB) is a clinical-stage biotechnology company headquartered in New Haven, Connecticut,
  founded in 2018, developing and commercializing life-transforming therapies for patients with severe and rare diseases.
  Its pipeline spans maternal-fetal health, complement dysregulation, hematology, and metabolic disorders, led by RLYB116,
  a differentiated complement component 5 (C5) inhibitor, and RLYB332, a long-acting matriptase-2 (MTP-2) antibody for iron-overload
  disorders. The company was surfaced as a portfolio company of Canaan Partners and added to the API Evangelist network. As
  a pharmaceutical company it publishes no public developer API, SDK, or machine-readable API surface; this profile captures
  corporate identity only.
url: https://raw.githubusercontent.com/api-evangelist/rallybio/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- canaan-partners
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Biotechnology
- Pharmaceuticals
- Rare Diseases
- Healthcare
- Life Sciences
- Clinical Stage
apis: []
common:
- type: Website
  url: https://rallybio.com/
- type: About
  url: https://rallybio.com/about-us/
- type: Blog
  url: https://investors.rallybio.com/news-releases
- type: Support
  url: https://rallybio.com/contact/
- type: TermsOfService
  url: https://rallybio.com/terms-of-use/
- type: PrivacyPolicy
  url: https://rallybio.com/privacy-policy/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: minimal
  artifacts_added: 0
  pass: local-v1

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