Auth0 Authorization Core — Authorization Core and Policy Engine

DodaTech Updated 2026-06-28 1 min read

In this tutorial, you'll learn about Auth0 Authorization Core. We cover key concepts, practical examples, and best practices to help you understand and apply this topic effectively.

Auth0 Authorization Core provides a policy engine for fine-grained access control decisions based on user attributes and context.

// Custom authorization policy
const policy = {
  name: 'scan-access-policy',
  statements: [
    {
      effect: 'Allow',
      actions: ['scan:read', 'scan:list'],
      resource: ['scans/*'],
      condition: {
        match: {
          'user.org_id': '${resource.org_id}'
        }
      }
    },
    {
      effect: 'Deny',
      actions: ['scan:delete'],
      resource: ['scans/*'],
      condition: {
        boolean: {
          'user.role': { notEquals: 'admin' }
        }
      }
    }
  ]
};

// Evaluate authorization
async function checkAccess(user, action, resource) {
  const decision = await auth0.authorization.evaluate({
    user_id: user.user_id,
    action: action,
    resource: resource,
    context: {
      ip: user.current_ip,
      time: new Date().toISOString()
    }
  });

  return decision.allowed;
}

Policy-based authorization separates access rules from application code for better auditability and flexibility.

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