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, Artificial Intelligence, 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

11.0/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

0 APIs

CompanyArtificial IntelligenceAI InfrastructureMachine-LearningLLMInferenceReinforcement LearningOpen-Source

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 11.0/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 1.4 / 20

Access Clarity 4.2 / 20

Operational Transparency 0.3 / 13

Contract Governance 0.0 / 12

Discoverability 5.0 / 10

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

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 →

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)

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: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
image: https://radixark.ai/images/Radixark-Web-Preview.png
tags:
- Company
- Artificial Intelligence
- AI Infrastructure
- Machine-Learning
- LLM
- Inference
- Reinforcement Learning
- Open-Source
tags_raw:
- 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