OpenFGA

OpenFGA is a CNCF incubating high-performance authorization system implementing fine-grained access control based on the Zanzibar model. It provides a flexible relationship-based authorization engine that evaluates access decisions using a type system defined in a modeling language. OpenFGA supports authorization checks, relationship queries, and list operations through its API.

OpenFGA publishes 6 APIs on the APIs.io network, including Assertions API, Authorization Models API, AuthZenService API, and 3 more. Tagged areas include Access Control, Authorization, Cloud-Native, Fine-Grained, and Incubating.

OpenFGA’s developer surface includes documentation, engineering blog, and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub

27.8/100 thin ▬ flat Agent 26/100 agent aware Full breakdown ↓
scored 2026-09-14 · rubric v0.22.0

AccessFreemium

1 APIs

Access Control Authorization Cloud-NativeFine-GrainedIncubating Zanzibar

Kin Score

Kin Score How this is scored →
scored 2026-09-14 · rubric v0.22.0

Composite quality — 27.8/100 · thin

Contract Quality 10.4 / 23

Developer Ergonomics 2.1 / 18

Access Clarity 2.8 / 18

Operational Transparency 1.5 / 12

Contract Governance 0.0 / 11

Discoverability 6.7 / 9

Create-or-Update Ergonomics 2.2 / 10

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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

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 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.

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/openfga: 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 6

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

OpenFGA Assertions API

The Assertions API from OpenFGA — 1 operation(s) for assertions.

OpenFGA Authorization Models API

The Authorization Models API from OpenFGA — 2 operation(s) for authorization models.

OpenFGA AuthZenService API

The AuthZenService API from OpenFGA — 6 operation(s) for authzenservice.

OpenFGA Relationship Queries API

The Relationship Queries API from OpenFGA — 6 operation(s) for relationship queries.

OpenFGA Relationship Tuples API

The Relationship Tuples API from OpenFGA — 3 operation(s) for relationship tuples.

OpenFGA Stores API

The Stores API from OpenFGA — 2 operation(s) for stores.

Open Collections 8

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

API Collection

OPEN COLLECTION

OpenFGA Assertions API

OPEN COLLECTION

OpenFGA Assertions Authorization Models API

OPEN COLLECTION

OpenFGA Assertions AuthZenService API

OPEN COLLECTION

OpenFGA Assertions Relationship Queries API

OPEN COLLECTION

OpenFGA Assertions Relationship Tuples API

OPEN COLLECTION

OpenFGA Assertions Stores API

OPEN COLLECTION

OpenFGA

OPEN COLLECTION

Scroll for all 8

Pricing Plans 1

Published pricing tiers and plan structures.

Openfga Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Openfga Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Openfga Finops

FINOPS

Security Posture 1

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

Openfga Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Openfga Agentic Access

24 operations · 17 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg

GitHubOrg

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: openfga
name: OpenFGA
description: OpenFGA is a CNCF incubating high-performance authorization system implementing fine-grained access control based
  on the Zanzibar model. It provides a flexible relationship-based authorization engine that evaluates access decisions using
  a type system defined in a modeling language. OpenFGA supports authorization checks, relationship queries, and list operations
  through its API.
url: https://openfga.dev
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/openfga.png
tags:
- Access Control
- Authorization
- Cloud-Native
- Fine-Grained
- Incubating
- Zanzibar
tags_raw:
- Access Control
- Authorization
- Cloud Native
- Fine-Grained
- Incubating
- Zanzibar
created: '2026-03-16'
modified: '2026-05-19'
specificationVersion: '0.23'
type: Index
apis:
- aid: openfga:openfga-assertions-api
  name: OpenFGA Assertions API
  description: The Assertions API from OpenFGA — 1 operation(s) for assertions.
  humanURL: https://openfga.dev/docs/getting-started
  tags:
  - Assertions
  properties:
  - type: OpenAPI
    url: openapi/openfga-assertions-api-openapi.yml
  - type: Documentation
    url: https://openfga.dev/docs/getting-started
- aid: openfga:openfga-authorization-models-api
  name: OpenFGA Authorization Models API
  description: The Authorization Models API from OpenFGA — 2 operation(s) for authorization models.
  humanURL: https://openfga.dev/docs/getting-started
  tags:
  - Authorization Models
  properties:
  - type: OpenAPI
    url: openapi/openfga-authorization-models-api-openapi.yml
  - type: Documentation
    url: https://openfga.dev/docs/getting-started
- aid: openfga:openfga-authzenservice-api
  name: OpenFGA AuthZenService API
  description: The AuthZenService API from OpenFGA — 6 operation(s) for authzenservice.
  humanURL: https://openfga.dev/docs/getting-started
  tags:
  - AuthZenService
  properties:
  - type: OpenAPI
    url: openapi/openfga-authzenservice-api-openapi.yml
  - type: Documentation
    url: https://openfga.dev/docs/getting-started
- aid: openfga:openfga-relationship-queries-api
  name: OpenFGA Relationship Queries API
  description: The Relationship Queries API from OpenFGA — 6 operation(s) for relationship queries.
  humanURL: https://openfga.dev/docs/getting-started
  tags:
  - Relationship Queries
  properties:
  - type: OpenAPI
    url: openapi/openfga-relationship-queries-api-openapi.yml
  - type: Documentation
    url: https://openfga.dev/docs/getting-started
- aid: openfga:openfga-relationship-tuples-api
  name: OpenFGA Relationship Tuples API
  description: The Relationship Tuples API from OpenFGA — 3 operation(s) for relationship tuples.
  humanURL: https://openfga.dev/docs/getting-started
  tags:
  - Relationship Tuples
  properties:
  - type: OpenAPI
    url: openapi/openfga-relationship-tuples-api-openapi.yml
  - type: Documentation
    url: https://openfga.dev/docs/getting-started
- aid: openfga:openfga-stores-api
  name: OpenFGA Stores API
  description: The Stores API from OpenFGA — 2 operation(s) for stores.
  humanURL: https://openfga.dev/docs/getting-started
  tags:
  - Stores
  properties:
  - type: OpenAPI
    url: openapi/openfga-stores-api-openapi.yml
  - type: Documentation
    url: https://openfga.dev/docs/getting-started
common:
- type: Website
  url: https://www.openfga.dev/
- type: AgenticAccess
  url: agentic-access/openfga-agentic-access.yml
- type: DomainSecurity
  url: security/openfga-domain-security.yml
- type: Documentation
  name: OpenFGA Documentation
  description: Official OpenFGA documentation.
  url: https://openfga.dev/docs/
- type: GitHubOrg
  name: OpenFGA GitHub
  description: Source code repository.
  url: https://github.com/openfga
- type: LlmsText
  url: https://openfga.dev/llms.txt
- type: Blog
  url: https://openfga.dev/blog/rss.xml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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