RadixArk

RadixArk is a deep-tech AI-infrastructure company on a mission to make frontier-level AI infrastructure open and accessible to everyone ("Build AI for all"). Backed by a $100M seed round announced in May 2026, RadixArk builds open-source infrastructure and managed tooling for training and serving modern AI models at scale. Its flagship open-source projects are SGLang, a fast and flexible inference/serving engine for large language and vision-language models, and Miles, an enterprise-facing reinforcement-learning framework for LLM and VLM post-training (with a companion Miles Diffusion framework for large-scale diffusion training). RadixArk also operates a managed platform at platform.radixark.com serving developers, enterprises, and research labs. The company does not yet expose a public REST/HTTP API; this profile captures its open-source packages, identity, and security posture pending an API surface.

RadixArk is profiled on the APIs.io network. Tagged areas include Company, AI, AI Infrastructure, Machine Learning, and LLM.

RadixArk’s developer surface includes engineering blog, signup flow, support, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub
15.6/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
CompanyAIAI InfrastructureMachine LearningLLMInferenceReinforcement LearningOpen Source

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 15.6/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 1.3 / 20
Commercial Clarity 6.8 / 20
Operational Transparency 0.7 / 13
Governance 0.0 / 12
Discoverability 6.8 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
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
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/radixark: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Radixark Domain Security

TLSv1.3 · HSTS · DNSSEC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp
SignUp

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

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
 Blog
Blog
 Twitter
Twitter

Source (apis.yml)

apis.yml Raw ↑ 
aid: radixark
name: RadixArk
description: RadixArk is a deep-tech AI-infrastructure company on a mission to make frontier-level AI infrastructure open
  and accessible to everyone ("Build AI for all"). Backed by a $100M seed round announced in May 2026, RadixArk builds open-source
  infrastructure and managed tooling for training and serving modern AI models at scale. Its flagship open-source projects
  are SGLang, a fast and flexible inference/serving engine for large language and vision-language models, and Miles, an enterprise-facing
  reinforcement-learning framework for LLM and VLM post-training (with a companion Miles Diffusion framework for large-scale
  diffusion training). RadixArk also operates a managed platform at platform.radixark.com serving developers, enterprises,
  and research labs. The company does not yet expose a public REST/HTTP API; this profile captures its open-source packages,
  identity, and security posture pending an API surface.
url: https://raw.githubusercontent.com/api-evangelist/radixark/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- accel
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
image: https://radixark.ai/images/Radixark-Web-Preview.png
tags:
- Company
- AI
- AI Infrastructure
- Machine Learning
- LLM
- Inference
- Reinforcement Learning
- Open Source
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.radixark.ai/
- type: Blog
  url: https://www.radixark.com/blog
- type: SignUp
  url: https://platform.radixark.com
- type: GitHubOrganization
  url: https://github.com/radixark
- type: TermsOfService
  url: https://www.radixark.com/tos
- type: PrivacyPolicy
  url: https://www.radixark.com/privacy
- type: Support
  url: mailto:contact@radixark.ai
- type: Twitter
  url: https://x.com/radixark
- type: Packages
  url: packages/radixark-packages.yml
- type: DomainSecurity
  url: security/radixark-domain-security.yml
x-enrichment:
  date: '2026-07-20'
  status: nochange
  artifacts_added: 0
  pass: local-v1