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Open Policy Agent website screenshot

Open Policy Agent

Open Policy Agent (OPA) is an open-source project that provides a flexible and powerful policy engine for cloud-native environments. OPA enables users to define and enforce policies across their infrastructure, applications, and services through a declarative language called Rego. OPA integrates seamlessly with popular tools and frameworks like Kubernetes, Istio, and Envoy, making it easy to implement fine-grained access control, security, and compliance policies.

agent ready

Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.

Kin Score

API Evangelist profiles Open Policy Agent the way a machine reads it — 24 machine-readable artifacts across 8 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.

Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Open Policy Agent scores 51.5/100 (developing), with a separate agent-readiness read of 56/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 51.5/100 · developing
Contract Quality 14.3 / 25
Developer Ergonomics 8.3 / 20
Commercial Clarity 5.8 / 20
Operational Transparency 6.8 / 13
Governance 8.8 / 12
Discoverability 7.5 / 10
Agent readiness — 56/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
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 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3

How we profile Open Policy Agent

Each block below is one kind of artifact we hold for Open Policy Agent. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 8

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

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

Open Policy Agent Compile API

The Compile API from Open Policy Agent — 1 operation(s) for compile.

Open Policy Agent Config API

The Config API from Open Policy Agent — 1 operation(s) for config.

Open Policy Agent Data API

The Data API from Open Policy Agent — 2 operation(s) for data.

Open Policy Agent Health API

The Health API from Open Policy Agent — 2 operation(s) for health.

Open Policy Agent Policies API

The Policies API from Open Policy Agent — 2 operation(s) for policies.

Open Policy Agent Query API API

The Query API API from Open Policy Agent — 1 operation(s) for query api.

Open Policy Agent Query API

The Query API from Open Policy Agent — 1 operation(s) for query.

Open Policy Agent Status API

The Status API from Open Policy Agent — 1 operation(s) for status.

Scroll within the panel for all 8 ·

Open Collections 7

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

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

Compile API

OPEN COLLECTION

Config API

OPEN COLLECTION

Data API

OPEN COLLECTION

Health API

OPEN COLLECTION

Policy API

OPEN COLLECTION

Query API

OPEN COLLECTION

Status API

OPEN COLLECTION

Scroll within the panel for all 7 ·

Pricing Plans 1

Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.

Published pricing tiers and plan structures.

Rate Limits 1

Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.

Documented rate limits and quota policies.

Open Policy Agent Rate Limits

1 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.

Cost, billing, and metering signals for API financial operations.

Semantic Vocabularies 1

JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.

JSON-LD contexts and semantic vocabularies used across these APIs.

Opa Context

0 classes · 12 properties

JSON-LD

Spectral Rules 1

Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.

Open Policy Agent API Rules

6 rules · 5 warnings

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.

Standalone JSON Schema definitions for this provider's data models.

Open Policy Agent Resources

0 properties

JSON SCHEMA

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

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

Open Policy Agent Domain Security

TLSv1.3 · HSTS

SECURITY

Open Policy Agent Vulnerability Disclosure

disclosure policy published

SECURITY

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

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

Open Policy Agent Agentic Access

18 operations · 10 acting

18 operations · 10 acting

AGENTIC

Resources

Every other property we hold for Open Policy Agent — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

Get Started 1

Portal, sign-up, and the first successful call

Documentation 3

Reference material describing how the API behaves

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Company 3

The organization behind the API

← All providers · Data indexed from github.com/api-evangelist/open-policy-agent · machine-readable index on apis.io