Pathos

Pathos (Pathos AI, Inc.) is an AI-enabled, clinical-stage biotechnology company founded in 2022 by Eric Lefkofsky and Ryan Fukushima that applies artificial intelligence and large-scale multimodal patient data to oncology drug development. Its PathOS platform is organized around three engines — Scout (AI asset selection that matches an investigational therapy to the patient subgroup most likely to respond), Sprint (small autonomous clinical-execution pods that design and run biomarker-driven trials), and Foundry (the oncology foundation model built in partnership with Tempus and AstraZeneca) — trained against a stated corpus of more than 200 petabytes of multimodal clinical, molecular and imaging data linked to patient outcomes. The company raised a $365M Series D in May 2025 at roughly a $1.6B valuation, completed the acquisition of Rain Oncology, and is advancing a precision-oncology pipeline that includes a CBP/p300 inhibitor and a brain-penetrant PRMT5 inhibitor. Pathos sells partnership and co-development to pharma and biotech; it publishes no public developer program, API, SDK or machine-readable specification.

Pathos is profiled on the APIs.io network. Tagged areas include Company, Artificial Intelligence, Healthcare, Biotechnology, and Oncology.

Pathos’ developer surface includes engineering blog, support, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub

10.2/100 minimal ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-08-17 · rubric v0.11.0

0 APIs

CompanyArtificial IntelligenceHealthcareBiotechnologyOncologyDrug DevelopmentClinical TrialsPrecision MedicineLife Sciences

Kin Score

Kin Score How this is scored →
scored 2026-08-17 · rubric v0.11.0

Composite quality — 10.2/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 1.1 / 17

Commercial Clarity 1.8 / 17

Operational Transparency 0.6 / 11

Governance 0.0 / 10

Discoverability 4.9 / 9

Regulatory Posture 1.9 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

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 3 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

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/pathos: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

ContentSignal

ContentSignal

Source (apis.yml)

aid: pathos
name: Pathos
description: Pathos (Pathos AI, Inc.) is an AI-enabled, clinical-stage biotechnology company founded in 2022 by Eric Lefkofsky
  and Ryan Fukushima that applies artificial intelligence and large-scale multimodal patient data to oncology drug development.
  Its PathOS platform is organized around three engines — Scout (AI asset selection that matches an investigational therapy
  to the patient subgroup most likely to respond), Sprint (small autonomous clinical-execution pods that design and run biomarker-driven
  trials), and Foundry (the oncology foundation model built in partnership with Tempus and AstraZeneca) — trained against
  a stated corpus of more than 200 petabytes of multimodal clinical, molecular and imaging data linked to patient outcomes.
  The company raised a $365M Series D in May 2025 at roughly a $1.6B valuation, completed the acquisition of Rain Oncology,
  and is advancing a precision-oncology pipeline that includes a CBP/p300 inhibitor and a brain-penetrant PRMT5 inhibitor.
  Pathos sells partnership and co-development to pharma and biotech; it publishes no public developer program, API, SDK or
  machine-readable specification.
url: https://raw.githubusercontent.com/api-evangelist/pathos/refs/heads/main/apis.yml
image: https://lirp.cdn-website.com/8e545b68/dms3rep/multi/opt/pathos-open_graph-97b7336f-1920w.jpg
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.20'
created: '2026-08-04'
modified: '2026-08-04'
tags:
- Company
- Artificial Intelligence
- Healthcare
- Biotechnology
- Oncology
- Drug Development
- Clinical Trials
- Precision Medicine
- Life Sciences
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.pathos.com/
- type: Blog
  url: https://www.pathos.com/news
- type: Support
  url: https://www.pathos.com/contact-us
- type: PrivacyPolicy
  url: https://www.pathos.com/privacy-policy
- type: GitHubOrganization
  url: https://github.com/pathos-inc
- type: LLMsTxt
  url: llms/pathos-llms.txt
- type: ContentSignal
  url: well-known/pathos-content-signal.yml
- type: DomainSecurity
  url: security/pathos-domain-security.yml
x-enrichment:
  date: '2026-08-04'
  status: minimal
  artifacts_added: 5
  pass: local-v1
x-coverage:
  state: none
  reason: no-developer-program
  detail: Pathos AI is a clinical-stage oncology biotech whose PathOS platform is run by its own Sprint pods and licensed
    through pharma partnership deals, not exposed to third parties — the entire nine-page site (platform, pipeline, partners,
    partner-with-us) offers a contact form and no developer surface at all, and api./developer./docs.pathos.com do not resolve.
  evidence:
  - url: https://www.pathos.com/developers
    status: 404
  - url: https://www.pathos.com/openapi.json
    status: 404
  - url: https://www.pathos.com/.well-known/agent-card.json
    status: 404
  - url: https://www.pathos.com/llms.txt
    status: 200
  checked: '2026-08-04'