Oxygen

Oxygen was a US fintech neobank founded in 2018 and a Y Combinator graduate, offering banking, debit-card, and financial products aimed at gig-economy workers, freelancers, small businesses, and entrepreneurs. Surfaced as a portfolio company of 500 Global and added to the API Evangelist network, the company's consumer services are currently unavailable ("we are working on new and exciting initiatives") and no public developer portal, API documentation, or machine-readable API surface could be found during enrichment. This profile is retained as a company lead with a live web presence but no active API program.

Oxygen is profiled on the APIs.io network. Tagged areas include Company, Fintech, Banking, Neobank, and Financial Services.

🌐 Visit website 📡 Source on GitHub
7.7/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
CompanyFintechBankingNeobankFinancial ServicesPayments

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 7.7/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 0.0 / 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/oxygen: 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.

Oxygen Domain Security

TLSv1.3 · HSTS

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: oxygen
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/oxygen.png
name: Oxygen
description: Oxygen was a US fintech neobank founded in 2018 and a Y Combinator graduate, offering banking, debit-card, and
  financial products aimed at gig-economy workers, freelancers, small businesses, and entrepreneurs. Surfaced as a portfolio
  company of 500 Global and added to the API Evangelist network, the company's consumer services are currently unavailable
  ("we are working on new and exciting initiatives") and no public developer portal, API documentation, or machine-readable
  API surface could be found during enrichment. This profile is retained as a company lead with a live web presence but no
  active API program.
url: https://raw.githubusercontent.com/api-evangelist/oxygen/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Fintech
- Banking
- Neobank
- Financial Services
- Payments
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/oxygen-domain-security.yml
- type: Website
  url: https://oxygen.us
x-enrichment:
  date: '2026-07-20'
  status: minimal
  artifacts_added: 1
  pass: local-v1