PlainID

PlainID is an enterprise authorization company whose Policy-Based Access Control (PBAC) platform, "The Authorization Platform," controls what identities (human and AI agent) can access, do, and expose across data, APIs, applications, and AI systems. The platform centralizes policy authoring and externalizes runtime access decisions through a Policy Decision Point (PDP), Policy Information Points (PIP), and Policy Authorization Agents. PlainID exposes three public REST API families: Runtime Authorization APIs (permit/deny decisions, policy resolution, user access tokens, PDP cache invalidation), Management APIs (policy, asset-template, application, mapper, and identity-template CRUD plus orchestration and SaaS-vendor management), and Administration APIs (audit events, API client credentials, platform reports). PlainID is backed by Insight Partners.

PlainID publishes 1 API on the APIs.io network. Tagged areas include Company, Cybersecurity, Authorization, Access Control, and PBAC.

PlainID’s developer surface includes documentation, API reference, getting-started guide, engineering blog, support, authentication, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub

29.1/100 thin ▬ flat Agent 3/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessSelf serve

1 APIs

Company Cybersecurity Authorization Access ControlPBACIdentity Policy Management API Security

Kin Score

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

Composite quality — 29.1/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 9.7 / 17

Access Clarity 3.6 / 17

Operational Transparency 1.7 / 11

Contract Governance 1.9 / 10

Discoverability 6.5 / 9

Regulatory Posture 5.7 / 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

Regulatory Posture applies to this provider. Its tags matched the Insurance 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/.

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/plainid: 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.

PlainID Authorization Platform API

Runtime Authorization (PDP permit/deny, policy resolution, user access token, cache invalidation), Management (policy/asset/application/mapper/identity CRUD, orchestration, SaaS...

Security Posture 2

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

Plainid Authentication

apiKey/oauth2/http · 3 schemes

SECURITY

Plainid Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

LLMsTxt

LLMsTxt

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

Conformance

Conformance

Lifecycle

Lifecycle

Build 1

SDKs, sample code, and the tooling you integrate with

Packages

Packages

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: plainid
name: PlainID
description: 'PlainID is an enterprise authorization company whose Policy-Based Access Control (PBAC) platform, "The Authorization
  Platform," controls what identities (human and AI agent) can access, do, and expose across data, APIs, applications, and
  AI systems. The platform centralizes policy authoring and externalizes runtime access decisions through a Policy Decision
  Point (PDP), Policy Information Points (PIP), and Policy Authorization Agents. PlainID exposes three public REST API families:
  Runtime Authorization APIs (permit/deny decisions, policy resolution, user access tokens, PDP cache invalidation), Management
  APIs (policy, asset-template, application, mapper, and identity-template CRUD plus orchestration and SaaS-vendor management),
  and Administration APIs (audit events, API client credentials, platform reports). PlainID is backed by Insight Partners.'
url: https://raw.githubusercontent.com/api-evangelist/plainid/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- insight-partners
x-tier: profiled
x-tier-reason: enriched-from-public-api-surface
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: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
image: https://logo.clearbit.com/plainid.com
tags:
- Company
- Cybersecurity
- Authorization
- Access Control
- PBAC
- Identity
- Policy Management
- API Security
apis:
- name: PlainID Authorization Platform API
  description: Runtime Authorization (PDP permit/deny, policy resolution, user access token, cache invalidation), Management
    (policy/asset/application/mapper/identity CRUD, orchestration, SaaS vendors), and Administration (audit, client credentials,
    reports) REST APIs for the PlainID Authorization Platform.
  humanURL: https://docs.plainid.io/v1-api
  baseURL: https://tenant.us1.plainid.io/api/runtime
  tags:
  - Authorization
  - Access Control
  - PBAC
  - Policy
  properties:
  - type: Documentation
    url: https://docs.plainid.io/v1-api
  - type: APIReference
    url: https://docs.plainid.io/apidocs/authorization-apis.md
  - type: Authentication
    url: authentication/plainid-authentication.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.plainid.com/
- type: DeveloperPortal
  url: https://docs.plainid.io/
- type: Documentation
  url: https://docs.plainid.io/v1-api
- type: APIReference
  url: https://docs.plainid.io/apidocs/authorization-apis.md
- type: GettingStarted
  url: https://docs.plainid.io/docs/getting-started-2.md
- type: Blog
  url: https://www.plainid.com/resources/?category=blog
- type: Support
  url: https://plainid.atlassian.net/servicedesk/customer/portals
- type: StatusPage
  url: https://status.plainid.io
- type: PrivacyPolicy
  url: https://www.plainid.com/privacy-policy/
- type: TermsOfService
  url: https://www.plainid.com/terms-of-use/
- type: Authentication
  url: authentication/plainid-authentication.yml
- type: Conventions
  url: conventions/plainid-conventions.yml
- type: Conformance
  url: conformance/plainid-conformance.yml
- type: Lifecycle
  url: lifecycle/plainid-lifecycle.yml
- type: DomainSecurity
  url: security/plainid-domain-security.yml
- type: Packages
  url: packages/plainid-packages.yml
- type: WellKnown
  url: well-known/plainid-well-known.yml
- type: LLMsTxt
  url: llms/plainid-llms.txt
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 7
  pass: local-v1

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/plainid"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/plainid/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/plainid/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.