Oso Cloud

Oso Cloud is an authorization-as-a-service platform that provides a REST API for defining and enforcing relationship-based access control policies. It enables developers to model RBAC, ReBAC, and ABAC authorization patterns, manage authorization facts, and query permissions at runtime with sub-10ms latency and 99.99% availability.

Oso Cloud publishes 4 APIs on the APIs.io network, including Centralized Authorization Data API, Check API API, Local Check API API, and 1 more. Tagged areas include Authorization, Access Control, RBAC, ReBAC, and ABAC.

The Oso Cloud catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Oso Cloud’s developer surface includes authentication, documentation, engineering blog, pricing, changelog, and 11 more developer resources.

🌐 Visit website 📡 Source on GitHub

44.3/100 developing ▬ flat Agent 20/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumSelf serve⚡ Free to try

1 APIs

Authorization Access Control RBAC ReBAC ABAC Permissions Policy Security Identity

Kin Score

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

Composite quality — 44.3/100 · developing

Contract Quality 9.9 / 19

Developer Ergonomics 1.8 / 15

Access Clarity 8.7 / 15

Operational Transparency 6.7 / 10

Contract Governance 0.9 / 9

Discoverability 5.1 / 8

Regulatory Posture 5.0 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 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 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

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 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.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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/oso: 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 4

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

Oso Cloud Centralized Authorization Data API

The Centralized Authorization Data API from Oso Cloud — 6 operation(s) for centralized authorization data.

Oso Cloud Check API API

The Check API API from Oso Cloud — 6 operation(s) for check api.

Oso Cloud Local Check API API

The Local Check API API from Oso Cloud — 4 operation(s) for local check api.

Oso Cloud Policy API

The Policy API from Oso Cloud — 2 operation(s) for policy.

Open Collections 5

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

API Collection

OPEN COLLECTION

Oso Cloud HTTP Centralized Authorization Data API

OPEN COLLECTION

Oso Cloud HTTP Centralized Authorization Data Check API API

OPEN COLLECTION

Oso Cloud HTTP Centralized Authorization Data Local Check API API

OPEN COLLECTION

Oso Cloud HTTP Centralized Authorization Data Policy API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Oso Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Oso Rate Limits

3 limits

RATE LIMITS

FinOps 1

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

Oso Finops

FINOPS

Semantic Vocabularies 1

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

Oso Context

0 classes · 41 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Oso Cloud API Rules

5 rules · 4 warnings 1 info

SPECTRAL

JSON Schema 40

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

ActionsQuery

5 properties

JSON SCHEMA

ActionsResult

1 properties

JSON SCHEMA

ApiError

1 properties

JSON SCHEMA

ApiResult

1 properties

JSON SCHEMA

AuthorizeQuery

6 properties

JSON SCHEMA

AuthorizeResourcesQuery

5 properties

JSON SCHEMA

AuthorizeResourcesResult

1 properties

JSON SCHEMA

AuthorizeResult

1 properties

JSON SCHEMA

Bulk

2 properties

JSON SCHEMA

ConcreteFact

2 properties

JSON SCHEMA

Constraint

2 properties

JSON SCHEMA

Fact

2 properties

JSON SCHEMA

FactChangeset

0 properties

JSON SCHEMA

GetPolicyMetadataResult

1 properties

JSON SCHEMA

GetPolicyResult

1 properties

JSON SCHEMA

ListQuery

7 properties

JSON SCHEMA

ListResult

2 properties

JSON SCHEMA

LocalActionsQuery

2 properties

JSON SCHEMA

LocalActionsResult

1 properties

JSON SCHEMA

LocalAuthQuery

2 properties

JSON SCHEMA

LocalAuthResult

1 properties

JSON SCHEMA

LocalListQuery

3 properties

JSON SCHEMA

LocalListResult

1 properties

JSON SCHEMA

LocalQuery

3 properties

JSON SCHEMA

LocalQueryMode

0 properties

JSON SCHEMA

LocalQueryResult

1 properties

JSON SCHEMA

Policy

2 properties

JSON SCHEMA

PolicyError

2 properties

JSON SCHEMA

PolicyFailure

0 properties

JSON SCHEMA

PolicyMetadata

1 properties

JSON SCHEMA

PolicyTestResult

3 properties

JSON SCHEMA

Query

4 properties

JSON SCHEMA

QueryDeprecated

2 properties

JSON SCHEMA

QueryResult

1 properties

JSON SCHEMA

QueryResultDeprecated

1 properties

JSON SCHEMA

ResourceBlockData

3 properties

JSON SCHEMA

SavePolicyError

0 properties

JSON SCHEMA

TestSummary

3 properties

JSON SCHEMA

TypedId

2 properties

JSON SCHEMA

Value

2 properties

JSON SCHEMA

Scroll for all 40

Examples 13

Example request and response payloads for these APIs.

Delete_Facts

5 fields

EXAMPLE

Get_Policy_Metadata

5 fields

EXAMPLE

Post_Actions

5 fields

EXAMPLE

Post_Actions_Query

5 fields

EXAMPLE

Post_Authorize

5 fields

EXAMPLE

Post_Authorize_Query

5 fields

EXAMPLE

Post_Batch

5 fields

EXAMPLE

Post_Evaluate_Query

5 fields

EXAMPLE

Post_Evaluate_Query_Local

5 fields

EXAMPLE

Post_Facts

5 fields

EXAMPLE

Post_List

5 fields

EXAMPLE

Post_List_Query

5 fields

EXAMPLE

Post_Policy

5 fields

EXAMPLE

Scroll for all 13

Security Posture 3

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

Oso Authentication

http · 1 scheme

SECURITY

Oso Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Oso Trust Center

SOC 2

SECURITY

Agentic Access 1

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

Oso Agentic Access

20 operations · 18 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg

GitHubOrg

Access & Security 3

Authentication, authorization, and security posture

TrustCenter

TrustCenter

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

StatusPage

StatusPage

ChangeLog

ChangeLog

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

aid: oso
name: Oso Cloud
description: Oso Cloud is an authorization-as-a-service platform that provides a REST API for defining and enforcing relationship-based
  access control policies. It enables developers to model RBAC, ReBAC, and ABAC authorization patterns, manage authorization
  facts, and query permissions at runtime with sub-10ms latency and 99.99% availability.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/oso.png
url: https://raw.githubusercontent.com/api-evangelist/oso/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.23'
type: Index
tags:
- Authorization
- Access Control
- RBAC
- ReBAC
- ABAC
- Permissions
- Policy
- Security
- Identity
apis:
- aid: oso:oso-centralized-authorization-data-api
  name: Oso Cloud Centralized Authorization Data API
  description: The Centralized Authorization Data API from Oso Cloud — 6 operation(s) for centralized authorization data.
  humanURL: https://www.osohq.com/docs
  baseURL: https://api.osohq.com/api
  tags:
  - Centralized Authorization Data
  properties:
  - type: OpenAPI
    url: openapi/oso-centralized-authorization-data-api-openapi.yml
  - type: Documentation
    url: https://www.osohq.com/docs
  - type: Authentication
    url: https://www.osohq.com/docs/app-integration/oso-cloud-configuration/api-keys
- aid: oso:oso-check-api-api
  name: Oso Cloud Check API API
  description: The Check API API from Oso Cloud — 6 operation(s) for check api.
  humanURL: https://www.osohq.com/docs
  baseURL: https://api.osohq.com/api
  tags:
  - Check API
  properties:
  - type: OpenAPI
    url: openapi/oso-check-api-api-openapi.yml
  - type: Documentation
    url: https://www.osohq.com/docs
  - type: Authentication
    url: https://www.osohq.com/docs/app-integration/oso-cloud-configuration/api-keys
- aid: oso:oso-local-check-api-api
  name: Oso Cloud Local Check API API
  description: The Local Check API API from Oso Cloud — 4 operation(s) for local check api.
  humanURL: https://www.osohq.com/docs
  baseURL: https://api.osohq.com/api
  tags:
  - Local Check API
  properties:
  - type: OpenAPI
    url: openapi/oso-local-check-api-api-openapi.yml
  - type: Documentation
    url: https://www.osohq.com/docs
  - type: Authentication
    url: https://www.osohq.com/docs/app-integration/oso-cloud-configuration/api-keys
- aid: oso:oso-policy-api
  name: Oso Cloud Policy API
  description: The Policy API from Oso Cloud — 2 operation(s) for policy.
  humanURL: https://www.osohq.com/docs
  baseURL: https://api.osohq.com/api
  tags:
  - Policy
  properties:
  - type: OpenAPI
    url: openapi/oso-policy-api-openapi.yml
  - type: Documentation
    url: https://www.osohq.com/docs
  - type: Authentication
    url: https://www.osohq.com/docs/app-integration/oso-cloud-configuration/api-keys
common:
- type: AgenticAccess
  url: agentic-access/oso-agentic-access.yml
- type: TrustCenter
  url: security/oso-trust-center.yml
- type: DomainSecurity
  url: security/oso-domain-security.yml
- type: Authentication
  url: authentication/oso-authentication.yml
- type: Website
  url: https://www.osohq.com
- type: Documentation
  url: https://www.osohq.com/docs
- type: GitHubOrg
  url: https://github.com/osohq
- type: LinkedIn
  url: https://www.linkedin.com/company/osohq
- type: Blog
  url: https://www.osohq.com/blog
- type: Pricing
  url: https://www.osohq.com/pricing
- type: StatusPage
  url: https://oso.statuspage.io/
- type: X
  url: https://x.com/osohq
- type: ChangeLog
  url: https://www.osohq.com/docs/changelog/whats-new
- type: Plans
  url: plans/oso-plans-pricing.yml
- type: RateLimits
  url: rate-limits/oso-rate-limits.yml
- type: FinOps
  url: finops/oso-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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/oso"

All providers

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

Every operation they expose

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

How their score was established

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