SGNL website screenshot

SGNL

SGNL is a continuous identity and authorization platform that eliminates standing privilege and makes real-time, context-aware access decisions for both human users and AI agents. It sits at the center of an enterprise IAM architecture, dynamically adapting permissions as conditions change and revoking sessions in real time. SGNL is built on the OpenID Shared Signals Framework (SSF) and the Continuous Access Evaluation Profile (CAEP), ingesting context from identity providers, HR systems, and security tooling to enforce zero standing privilege across cloud and infrastructure. Its Public API v2 (Access Service) exposes REST/JSON access evaluation, asset and principal search, directory query, and provider-hook routing.

SGNL publishes 1 API on the APIs.io network. Tagged areas include Company, Security, Identity, Authorization, and Access Management.

SGNL’s developer surface includes documentation, API reference, support, engineering blog, signup flow, authentication, and 17 more developer resources.

🌐 Visit website 📡 Source on GitHub
30.1/100 thin ▬ flat Agent 3/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
1 APIs
CompanySecurityIdentityAuthorizationAccess ManagementCAEPShared SignalsZero Standing PrivilegeIAM

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 30.1/100 · thin
Contract Quality 1.3 / 25
Developer Ergonomics 10.5 / 20
Access Clarity 6.8 / 20
Operational Transparency 1.7 / 13
Contract Governance 2.2 / 12
Discoverability 7.6 / 10
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 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
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
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
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/sgnl: 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.

SGNL Public API v2 (Access Service)

REST/JSON access-evaluation API. Evaluate whether a principal may perform actions on assets in context, search accessible assets or authorized principals, query the directory, a...

Security Posture 3

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

Sgnl Authentication

http · 1 scheme

SECURITY

Sgnl Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Sgnl Vulnerability Disclosure

Hackerone · contact published

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 SignUp
SignUp

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate
X-MCPServerCandidate
 LLMsTxt
LLMsTxt
 WellKnown
WellKnown

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 Conformance
Conformance
 DataModel
DataModel
 Lifecycle
Lifecycle

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs

Access & Security 4

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity
 VulnerabilityDisclosure
VulnerabilityDisclosure
 Security
Security

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: sgnl
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - 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/sgnl.png
name: SGNL
description: SGNL is a continuous identity and authorization platform that eliminates standing privilege and makes real-time,
  context-aware access decisions for both human users and AI agents. It sits at the center of an enterprise IAM architecture,
  dynamically adapting permissions as conditions change and revoking sessions in real time. SGNL is built on the OpenID Shared
  Signals Framework (SSF) and the Continuous Access Evaluation Profile (CAEP), ingesting context from identity providers,
  HR systems, and security tooling to enforce zero standing privilege across cloud and infrastructure. Its Public API v2 (Access
  Service) exposes REST/JSON access evaluation, asset and principal search, directory query, and provider-hook routing.
url: https://raw.githubusercontent.com/api-evangelist/sgnl/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- costanoa-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Security
- Identity
- Authorization
- Access Management
- CAEP
- Shared Signals
- Zero Standing Privilege
- IAM
apis:
- name: SGNL Public API v2 (Access Service)
  description: REST/JSON access-evaluation API. Evaluate whether a principal may perform actions on assets in context, search
    accessible assets or authorized principals, query the directory, and route provider hooks. Bearer-token authentication
    over HTTPS.
  humanURL: https://developer.sgnl.ai/
  baseURL: https://clientName.sgnlapis.cloud
  tags:
  - Authorization
  - Access Management
  - Identity
  properties:
  - type: Documentation
    url: https://developer.sgnl.ai/
  - type: APIReference
    url: https://developer.sgnl.ai/
  - type: Authentication
    url: authentication/sgnl-authentication.yml
  - type: Conventions
    url: conventions/sgnl-conventions.yml
  - type: DataModel
    url: data-model/sgnl-data-model.yml
  - type: X-MCPServerCandidate
    url: mcp/sgnl-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.'
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://sgnl.ai
- type: DeveloperPortal
  url: https://developer.sgnl.ai/
- type: Documentation
  url: https://developer.sgnl.ai/
- type: APIReference
  url: https://developer.sgnl.ai/
- type: Support
  url: https://help.sgnl.ai/
- type: Blog
  url: https://sgnl.ai/blog/
- type: GitHubOrganization
  url: https://github.com/SGNL-ai
- type: SignUp
  url: https://sgnl.ai/demo/
- type: TermsOfService
  url: https://sgnl.ai/terms-of-use/
- type: PrivacyPolicy
  url: https://sgnl.ai/privacy/
- type: Authentication
  url: authentication/sgnl-authentication.yml
- type: Conventions
  url: conventions/sgnl-conventions.yml
- type: Conformance
  url: conformance/sgnl-conformance.yml
- type: DataModel
  url: data-model/sgnl-data-model.yml
- type: Lifecycle
  url: lifecycle/sgnl-lifecycle.yml
- type: Packages
  url: packages/sgnl-packages.yml
- type: SDKs
  url: packages/sgnl-packages.yml
- type: X-MCPServerCandidate
  url: mcp/sgnl-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: LLMsTxt
  url: llms/sgnl-llms.txt
- type: WellKnown
  url: well-known/sgnl-well-known.yml
- type: DomainSecurity
  url: security/sgnl-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/sgnl-vulnerability-disclosure.yml
- type: Security
  url: https://sgnl.ai/responsible-disclosure/
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 11
  pass: local-v1

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