Fine-Grained Access. Zero Guesswork.

Define and enforce precise, contextual access policies at the most granular level—with zero app code changes.

Keymate enforces fine-grained access control by evaluating real-time authorization requests through a dedicated FGA service. Policies are defined centrally and evaluated at the edge, ensuring every request is filtered through precise permission logic.

How Keymate Implements Fine-Grained Authorization

Keymate enforces fine-grained access control by evaluating real-time authorization requests through a dedicated FGA service.

FGA Architecture Flow

Policies are defined centrally and evaluated at the edge (API Gateway or SDK), ensuring every request is filtered through precise permission logic. Enforcement happens independently of application logic, and integrates with OpenFGA as the decision engine.

Example: API requests flow through the FGA Policy Engine for authorization decisions

Key Components:

API Gateway

FGA Service

OpenFGA

Session Token

Fine-Grained Authorization Features

These capabilities allow you to enforce precise, context-aware access logic at scale—without compromising developer velocity.

Granular Permission Scoping

Define access policies at the record, row, or even field level using token claims and resource metadata.

Resource–Action Modeling

Pair each resource type with allowed actions (e.g., read, edit, approve) to express exact permissions.

Centralized Policy Engine

Externalize permission logic into a dedicated FGA service—decoupled from application code.

Zero-Integration Enforcement

Enforce policies through API Gateway plugins or SDKs. No need to touch frontend or backend code.

Policy Versioning & Diff Tools

Track changes over time with visual diffs and safe rollout support for production policies.

Why-Denied Debug Panel

Instantly see why a request failed: missing relation, attribute mismatch, or scope issue.

Built for modern applications that need sophisticated authorization without complexity.

Try Fine-Grained Authorization in a Live App

Explore how Keymate enforces fine-grained access decisions in real time—based on user attributes, relationships, and request context.

Request Configuration

User

Action

Resource

Context: Risk Score: 3, Department: finance

Authorization Result

✅Access Granted

User alice has finance manager relation on project:123 within finance department

Active Policy:

Policy: allow if (
  user.department == resource.department &&
  user.risk_score < 5 &&
  (action != "delete" || user.role in ["manager", "admin"])
)

This policy blocks access unless the user is in the same department with risk score < 5

Frequently Asked Questions

Common questions about Fine-Grained Authorization and how Keymate implements FGA.

Fine-Grained Authorization (FGA) is a modern access control technique that evaluates user permissions at a very granular level—such as specific records, fields, or relationships—rather than relying solely on predefined roles. Keymate offers native FGA support to enforce these policies securely and flexibly.

While RBAC assigns broad access based on roles, FGA evaluates dynamic factors like user-resource relationships, department, location, or time. This results in more accurate and safer access decisions. Keymate enhances RBAC with native FGA and contextual awareness.

FGA is used to secure APIs, services, and data at a detailed level—like controlling who can approve, update, or view a specific document. It's ideal for regulated industries, multitenant apps, or B2B environments. Keymate enables these use cases with minimal application changes.

Yes. Keymate provides zero-integration enforcement via API Gateway plugins and SDKs, so you can define and enforce FGA policies without touching your business logic.

Unlike generic policy engines, Keymate is purpose-built for IAM. It combines OpenFGA, contextual session data, simulation tools, and tenant-aware architecture—making it a complete fine-grained authorization solution.

How to Use Fine-Grained Authorization

You can start using Fine-Grained Authorization in your existing architecture with minimal effort. Define policies, simulate decisions, and enforce access via SDKs or API Gateway plugins.

Explore the guides below to get started

Keymate FGA Policy Authoring Guide

Learn how to define fine-grained authorization policies using our policy authoring tools and DSL.

How to Use FGA with OpenFGA

Integrate OpenFGA as your authorization engine with Keymate for scalable policy evaluation.

FGA Simulation and Debug Tool

Test your policies before deployment using our interactive simulation and debugging platform.

API Gateway Plugin Integration

Enforce FGA policies at the API Gateway level without modifying your application code.

Keymate Developer Docs

Complete documentation, SDKs, and examples for implementing FGA in your applications.

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