Flexion

Flexion Robotics builds the autonomy stack for humanoid robots — from command to control, from manipulation to locomotion, across any hardware and task. Founded by former NVIDIA and ETH Zurich reinforcement-learning researchers (Nikita Rudin, David Höller, Julian Nubert), the Zurich- and San Francisco-based company uses large-scale simulation and reinforcement learning to train generalizable robot policies that transfer to real-world hardware. Its Flexion Reflect model line targets long-horizon autonomous humanoid work. The company raised $50M and is backed by Prosus Ventures. Flexion does not currently expose a public developer API.

Flexion is profiled on the APIs.io network. Tagged areas include Company, Ai, Robotics, Humanoid Robots, and Autonomy.

Flexion’s developer surface includes engineering blog and 2 more developer resources.

🌐 Visit website 📡 Source on GitHub

9.3/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyAiRoboticsHumanoid RobotsAutonomyReinforcement LearningMachine LearningSimulation

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 9.3/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.4 / 20

Commercial Clarity 2.1 / 20

Operational Transparency 0.0 / 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

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Resources

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: flexion
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/flexion.png
name: Flexion
description: Flexion Robotics builds the autonomy stack for humanoid robots — from command to control, from manipulation to
  locomotion, across any hardware and task. Founded by former NVIDIA and ETH Zurich reinforcement-learning researchers (Nikita
  Rudin, David Höller, Julian Nubert), the Zurich- and San Francisco-based company uses large-scale simulation and reinforcement
  learning to train generalizable robot policies that transfer to real-world hardware. Its Flexion Reflect model line targets
  long-horizon autonomous humanoid work. The company raised $50M and is backed by Prosus Ventures. Flexion does not currently
  expose a public developer API.
url: https://raw.githubusercontent.com/api-evangelist/flexion/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- prosus-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Ai
- Robotics
- Humanoid Robots
- Autonomy
- Reinforcement Learning
- Machine Learning
- Simulation
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://flexion.ai
- type: Blog
  url: https://flexion.ai/news
- type: PrivacyPolicy
  url: https://flexion.ai/legal-pages/privacy-policy
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence