Yubico

Yubico is the security company behind the YubiKey hardware authentication device and the inventor of the Yubico One-Time Password (OTP). Its public developer surface centers on YubiCloud, a hosted REST service that verifies Yubico OTPs via a signed HTTPS request to api.yubico.com, alongside a broad set of first-party SDKs and libraries for WebAuthn/FIDO2, PIV smart cards, OATH, OTP, and the YubiHSM 2 across Python, .NET, Java, Android, iOS, and C, plus the ykman command-line tool. Yubico co-authored the FIDO U2F standard, ships FIPS 140-3 validated keys, and holds a SOC 2 Type 2 attestation for its enterprise services.

Yubico publishes 1 API on the APIs.io network: Validation API. Tagged areas include Company, Enterprise, Authentication, Security, and Identity.

Yubico’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, signup flow, pricing, and 26 more developer resources.

🌐 Visit website 📡 Source on GitHub

55.1/100 strong ▬ flat Agent 28/100 agent aware saas Full breakdown ↓
scored 2026-09-06 · rubric v0.19.0

1 APIs

Company Enterprise Authentication Security Identity Hardware Security FIDO2 WebAuthnOne-Time Password

Kin Score

Kin Score How this is scored →
scored 2026-09-06 · rubric v0.19.0

Composite quality — 55.1/100 · strong

Contract Quality 13.8 / 25

Developer Ergonomics 14.6 / 20

Access Clarity 12.1 / 20

Operational Transparency 4.8 / 13

Contract Governance 2.2 / 12

Discoverability 7.6 / 10

Agent readiness — 28/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/yubico: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

AgentSkill

LLMsTxt

WellKnown

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 7

Authentication, authorization, and security posture

SecurityTxt

Authentication

Compliance

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

TrustCenter

TrustCenter

Scroll for all 7

Operate 3

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Deprecation

Deprecation

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: yubico
name: Yubico
description: Yubico is the security company behind the YubiKey hardware authentication device and the inventor of the Yubico
  One-Time Password (OTP). Its public developer surface centers on YubiCloud, a hosted REST service that verifies Yubico OTPs
  via a signed HTTPS request to api.yubico.com, alongside a broad set of first-party SDKs and libraries for WebAuthn/FIDO2,
  PIV smart cards, OATH, OTP, and the YubiHSM 2 across Python, .NET, Java, Android, iOS, and C, plus the ykman command-line
  tool. Yubico co-authored the FIDO U2F standard, ships FIPS 140-3 validated keys, and holds a SOC 2 Type 2 attestation for
  its enterprise services.
url: https://raw.githubusercontent.com/api-evangelist/yubico/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
image: https://www.yubico.com/wp-content/uploads/2021/02/Yubico-Logo.png
tags:
- Company
- Enterprise
- Authentication
- Security
- Identity
- Hardware Security
- FIDO2
- WebAuthn
- One-Time Password
apis:
- aid: yubico:yubico-validation-api
  name: Yubico Validation API
  description: Yubico OTP validation operations.
  humanURL: https://developers.yubico.com/Software_Projects/YubiCloud_REST_API.html
  baseURL: https://api.yubico.com/wsapi/2.0
  tags:
  - Validation
  properties:
  - type: OpenAPI
    url: openapi/yubico-validation-api-openapi.yml
  - type: Documentation
    url: https://developers.yubico.com/OTP/
  - type: APIReference
    url: https://developers.yubico.com/Software_Projects/YubiCloud_REST_API.html
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Overlay
  url: overlays/yubico-yubicloud-overlay.yaml
- type: Website
  url: https://yubico.com
- type: DeveloperPortal
  url: https://developers.yubico.com/
- type: Documentation
  url: https://developers.yubico.com/OTP/
- type: APIReference
  url: https://developers.yubico.com/Software_Projects/YubiCloud_REST_API.html
- type: GettingStarted
  url: https://developers.yubico.com/OTP/OTP_Walk-Through.html
- type: GitHubOrganization
  url: https://github.com/Yubico
- type: Support
  url: https://support.yubico.com/
- type: Blog
  url: https://www.yubico.com/blog/
- type: SignUp
  url: https://upgrade.yubico.com/getapikey/
- type: Pricing
  url: https://www.yubico.com/store/
- type: TermsOfService
  url: https://www.yubico.com/support/terms-conditions/
- type: PrivacyPolicy
  url: https://www.yubico.com/support/terms-conditions/privacy-notice/
- type: StatusPage
  url: https://status.yubico.com/
- type: Deprecation
  url: https://support.yubico.com/hc/en-us/articles/360016614820
- type: Packages
  url: packages/yubico-packages.yml
- type: SDKs
  url: packages/yubico-packages.yml
- type: CLI
  url: cli/yubico-cli.yml
- type: X-MCPServerCandidate
  url: mcp/yubico-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/yubico-llms.txt
- type: WellKnown
  url: well-known/yubico-well-known.yml
- type: SecurityTxt
  url: well-known/yubico-security.txt
- type: Authentication
  url: authentication/yubico-authentication.yml
- type: Conventions
  url: conventions/yubico-conventions.yml
- type: ErrorCatalog
  url: errors/yubico-error-codes.yml
- type: Lifecycle
  url: lifecycle/yubico-lifecycle.yml
- type: Conformance
  url: conformance/yubico-conformance.yml
- type: Compliance
  url: https://www.yubico.com/solutions/cybersecurity-compliance/
- type: DomainSecurity
  url: security/yubico-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/yubico-vulnerability-disclosure.yml
- type: Security
  url: https://www.yubico.com/support/issue-rating-system/
- type: TrustCenter
  url: security/yubico-trust-center.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 18
  pass: local-v1

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Yubico

Kin Score

APIs 1

Yubico Validation API

Open Collections 2

API Collection

Yubico YubiCloud OTP Validation API

Security Posture 4

Yubico Authentication

Yubico Domain Security

Yubico Vulnerability Disclosure

Yubico Trust Center

Resources