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 is listed with 1 API on the APIs.io network. Tagged areas include Company, Security, Identity, Authorization, and Identity and Access Management.

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

🌐 Visit website 📡 Profile data on GitHub

32.2/100 thin ▬ flat Agent 3/100 human only Front door AI 5/6 prominent Heartbeat 84/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API

Company Security Identity Authorization Identity and Access Management CAEPShared SignalsZero Standing Privilege

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 32.2/100 · thin

Contract Quality 1.1 / 21

Developer Ergonomics 8.9 / 17

Access Clarity 5.8 / 17

Operational Transparency 1.5 / 11

Contract Governance 1.9 / 10

Discoverability 6.2 / 9

Regulatory Posture 4.6 / 15

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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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 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.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0

12 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 5.3 — up to +23.7 composite points
Access Clarity scores 34.2 — up to +13.2 composite points
Operational Transparency scores 13.2 — up to +11.3 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/sgnl/apis.yml: open an issue on github.com/api-evangelist/sgnl to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
OpenID Certified Implementations (OIDC, FAPI, OpenID4VC)	standard	46.0	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 2

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

IAM

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

Shared Signals Framework

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

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

Conformance

DataModel

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)

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: '2026-11-06'
  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'
x-docs-platform: stoplight
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
tags:
- Company
- Security
- Identity
- Authorization
- Identity and Access Management
- CAEP
- Shared Signals
- Zero Standing Privilege
tags_raw:
- 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
  - Identity and Access Management
  - Identity
  tags_raw:
  - 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

SGNL API — frequently asked questions

Does SGNL have an API?

Yes. APIs.io lists 1 API from SGNL, including SGNL Public API v2 (Access Service).

How do I authenticate with the SGNL API?

SGNL uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Sgnl Authentication.

Is the SGNL API ready for AI agents?

SGNL has a Kin Score of 32.2 out of 100 (thin) and an Agent Readiness score of 2.5 (human-only), scored by API Evangelist on 2026-11-06.

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