Keyo

Keyo is a palm-based biometric identification platform offering a complete suite of touchless identity SaaS for payments, access control, ticketing, and time & attendance. Its palm-print and palm-vein (near-infrared) technology lets people verify their identity with a wave of the hand. Keyo exposes a REST API (developers.keyo.co) for managing biometric Identities and driving palm enrollment on Keyo devices, secured with the OAuth 2.0 client-credentials flow, plus real-time webhooks for enrollment and identification events. Keyo is backed by 500 Global and Obvious Ventures.

Keyo publishes 2 APIs on the APIs.io network: Authentication API and Identities API. Tagged areas include Company, Biometrics, Identity, Authentication, and Palm Recognition.

The Keyo catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Keyo’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, signup flow, authentication, and 19 more developer resources.

🌐 Visit website 📡 Source on GitHub

50.2/100 developing ▬ flat Agent 22/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Company Biometrics Identity AuthenticationPalm RecognitionAccess Control Payments Identity Verification

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 50.2/100 · developing

Contract Quality 12.0 / 19

Developer Ergonomics 8.8 / 15

Access Clarity 5.9 / 15

Operational Transparency 3.3 / 10

Contract Governance 0.4 / 9

Discoverability 5.7 / 8

Regulatory Posture 7.5 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Payments regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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/keyo: 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 2

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

Keyo Authentication API

Exchange client credentials for an access token.

Keyo Identities API

Manage biometric identities and palm enrollment.

Open Collections 3

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Keyo REST Authentication API

OPEN COLLECTION

Keyo REST Authentication Identities API

OPEN COLLECTION

Arazzo Workflows 1

Multi-step API workflows described with the Arazzo specification.

Keyo - enroll a palm biometric identity

Authenticate, create a Keyo Identity, and start palm biometric enrollment on a device. Grounded in the reconstructed Keyo OpenAPI operationIds.

ARAZZO

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Keyo Webhooks

Keyo delivers real-time notifications about palm biometric events within an organization by sending HTTP POST requests to a webhook endpoint URL registered in the organization d...

ASYNCAPI

Security Posture 4

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Keyo Authentication

http · 2 schemes

SECURITY

Keyo Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Keyo Vulnerability Disclosure

Hackerone · contact published

SECURITY

Keyo Trust Center

SOC 2, GDPR, CCPA, BIPA

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Keyo Agentic Access

7 operations · 5 acting

AGENTIC

Resources

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

LLMsTxt

LLMsTxt

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

AgenticAccess

AgenticAccess

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

DataModel

Lifecycle

Conformance

Access & Security 6

Authentication, authorization, and security posture

Compliance

Compliance

Security

Security

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: keyo
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
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/keyo.png
name: Keyo
description: Keyo is a palm-based biometric identification platform offering a complete suite of touchless identity SaaS for
  payments, access control, ticketing, and time & attendance. Its palm-print and palm-vein (near-infrared) technology lets
  people verify their identity with a wave of the hand. Keyo exposes a REST API (developers.keyo.co) for managing biometric
  Identities and driving palm enrollment on Keyo devices, secured with the OAuth 2.0 client-credentials flow, plus real-time
  webhooks for enrollment and identification events. Keyo is backed by 500 Global and Obvious Ventures.
url: https://raw.githubusercontent.com/api-evangelist/keyo/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
- obvious-ventures
x-tier: enriched
x-tier-reason: developer-surface-found
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Biometrics
- Identity
- Authentication
- Palm Recognition
- Access Control
- Payments
- Identity Verification
apis:
- aid: keyo:keyo-authentication-api
  name: Keyo Authentication API
  description: Exchange client credentials for an access token.
  humanURL: https://developers.keyo.co
  baseURL: https://api.keyo.co/v1
  tags:
  - Authentication
  properties:
  - type: OpenAPI
    url: openapi/keyo-authentication-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/keyo-webhooks-asyncapi.yml
  - type: Webhooks
    url: asyncapi/keyo-webhooks-asyncapi.yml
  - type: Arazzo
    url: arazzo/keyo-enroll-identity.yml
- aid: keyo:keyo-identities-api
  name: Keyo Identities API
  description: Manage biometric identities and palm enrollment.
  humanURL: https://developers.keyo.co
  baseURL: https://api.keyo.co/v1
  tags:
  - Identities
  properties:
  - type: OpenAPI
    url: openapi/keyo-identities-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/keyo-webhooks-asyncapi.yml
  - type: Webhooks
    url: asyncapi/keyo-webhooks-asyncapi.yml
  - type: Arazzo
    url: arazzo/keyo-enroll-identity.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Overlay
  url: overlays/keyo-openapi-overlay.yaml
- type: DeveloperPortal
  url: https://developers.keyo.co
- type: Documentation
  url: https://developers.keyo.co
- type: APIReference
  url: https://developers.keyo.co/rest-api/identities
- type: GettingStarted
  url: https://developers.keyo.co/getting-started/overview
- type: Support
  url: https://developers.keyo.co/resources/support
- type: Blog
  url: https://keyo.com/newsroom
- type: SignUp
  url: https://keyo.com/get-keyo
- type: PrivacyPolicy
  url: https://keyo.com/privacy
- type: LLMsTxt
  url: llms/keyo-llms.txt
- type: X-MCPServerCandidate
  url: mcp/keyo-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: Conventions
  url: conventions/keyo-conventions.yml
- type: ErrorCatalog
  url: errors/keyo-problem-types.yml
- type: DataModel
  url: data-model/keyo-data-model.yml
- type: Lifecycle
  url: lifecycle/keyo-lifecycle.yml
- type: StatusPage
  url: https://status.keyo.co
- type: Conformance
  url: conformance/keyo-conformance.yml
- type: Compliance
  url: https://keyo.com/security
- type: Security
  url: https://keyo.com/security
- type: AgenticAccess
  url: agentic-access/keyo-agentic-access.yml
- type: TrustCenter
  url: security/keyo-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/keyo-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/keyo-domain-security.yml
- type: Authentication
  url: authentication/keyo-authentication.yml
- type: Website
  url: https://keyo.com
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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