Daivin website screenshot

Daivin

DAIVIN! is a deep-tech hardware company (Y Combinator Winter 2026, based in San Francisco and Finland) building tankless diving technology. Its core product, SPRING, is marketed as the "world's first tankless diving technology": instead of carrying heavy pressurized oxygen tanks, a diver wears a lightweight vest of electrolyzers and a battery belt that use electricity to split water on demand into breathable oxygen (O2) and hydrogen (H2), targeting depths up to 200 meters / 650 ft. Founder Leo Kankkunen frames breathing as "fundamentally an energy problem," and the company envisions applications beyond recreational and professional diving across space exploration, high-altitude rescue, hospitals, and aircraft. Added to the API Evangelist network as a venture-capital portfolio lead surfaced via y-combinator. Daivin runs a conceptual marketing website (Wix) and a news blog; it publishes no public API, developer portal, SDK, or other machine-readable developer surface, so no API artifacts apply to this provider.

Daivin is profiled on the APIs.io network. Tagged areas include Company, Deep Tech, Hardware, Diving, and Electrolysis.

Daivin’s developer surface includes engineering blog, YouTube channel, and 4 more developer resources.

🌐 Visit website 📡 Source on GitHub
7.2/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
CompanyDeep TechHardwareDivingElectrolysisOxygen GenerationLife SupportY CombinatorSan Francisco

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 7.2/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 0.4 / 20
Commercial Clarity 0.0 / 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
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/daivin: 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.

Daivin Domain Security

TLSv1.3 · HSTS · DNSSEC

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Learn 1

Tutorials, courses, talks, and written guidance

YouTube
YouTube

Company 4

The organization behind the API

Website
Website
 Blog
Blog
 Twitter
Twitter
 LinkedIn
LinkedIn

Source (apis.yml)

apis.yml Raw ↑ 
aid: daivin
name: Daivin
description: 'DAIVIN! is a deep-tech hardware company (Y Combinator Winter 2026, based in San Francisco and Finland) building
  tankless diving technology. Its core product, SPRING, is marketed as the "world''s first tankless diving technology": instead
  of carrying heavy pressurized oxygen tanks, a diver wears a lightweight vest of electrolyzers and a battery belt that use
  electricity to split water on demand into breathable oxygen (O2) and hydrogen (H2), targeting depths up to 200 meters /
  650 ft. Founder Leo Kankkunen frames breathing as "fundamentally an energy problem," and the company envisions applications
  beyond recreational and professional diving across space exploration, high-altitude rescue, hospitals, and aircraft. Added
  to the API Evangelist network as a venture-capital portfolio lead surfaced via y-combinator. Daivin runs a conceptual marketing
  website (Wix) and a news blog; it publishes no public API, developer portal, SDK, or other machine-readable developer surface,
  so no API artifacts apply to this provider.'
url: https://raw.githubusercontent.com/api-evangelist/daivin/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
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: '2026-07-18'
image: https://static.wixstatic.com/media/3a3f12_27889fdcbf604e6d84bb16761193d675~mv2.png/v1/fill/w_1024,h_1024,al_c/3a3f12_27889fdcbf604e6d84bb16761193d675~mv2.png
tags:
- Company
- Deep Tech
- Hardware
- Diving
- Electrolysis
- Oxygen Generation
- Life Support
- Y Combinator
- San Francisco
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.daivin.tech
- type: Blog
  url: https://www.daivin.tech/blog
- type: DomainSecurity
  url: security/daivin-domain-security.yml
- type: Twitter
  url: https://x.com/DAIVIN_TECH
- type: YouTube
  url: https://www.youtube.com/@DAIVINTECH
- type: LinkedIn
  url: https://www.linkedin.com/company/daivin
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence