diff --git a/integrations/javascript/src/index.ts b/integrations/javascript/src/index.ts
new file mode 100644
index 0000000..7fd499a
--- /dev/null
+++ b/integrations/javascript/src/index.ts
@@ -0,0 +1,85 @@
+import { License, LicenseStatus } from './entities/License';
+import { LicenseMeta } from './entities/LicenseMeta';
+
+export class LicenseValidator {
+    private readonly API_VERSION = 1;
+    private readonly baseUrl: string;
+    private readonly validationKey: string;
+    private retries: number = 3;
+
+    constructor(baseUrl: string, validationKey: string) {
+        this.baseUrl = baseUrl.endsWith('/') ? baseUrl.slice(0, -1) : baseUrl;
+        this.validationKey = validationKey;
+    }
+
+    private async retrieveLicenseRaw(licenseKey: string): Promise<string | null> {
+        const url = `${this.baseUrl}/api/v${this.API_VERSION}/validate/${encodeURIComponent(licenseKey)}`;
+        try {
+            const response = await fetch(url, {
+                method: 'GET',
+                headers: {
+                    'User-Agent': 'LicenseAPI-Java-Client',
+                    'X-Validation-Key': this.validationKey,
+                },
+            });
+            if (response.ok) return response.text();
+            console.warn(`Failed to retrieve license. Status: ${response.status}`);
+        } catch (error) {
+            console.error('Error retrieving license:', error);
+        }
+        return null;
+    }
+
+    private async retry<T>(fn: () => Promise<T | null>, retries: number): Promise<T | null> {
+        let result: T | null = await fn();
+        let attempts = 0;
+
+        while (!result && attempts < retries) {
+            await new Promise(resolve => setTimeout(resolve, 1000));
+            result = await fn();
+            attempts++;
+        }
+
+        return result;
+    }
+
+    private parseLicense(status: LicenseStatus, license: any): License {
+        if (status !== LicenseStatus.VALID) {
+            return new License(status, '', [], [], [], -1, 0, null);
+        }
+
+        const licenseKey = license.key || '';
+        const groups = license.groups || [];
+        const permissions = license.permissions || [];
+        const meta = Object.keys(license.meta || {}).map(key => new LicenseMeta(key, license.meta[key]));
+        const maxUses = license.maxUses || -1;
+        const currentUses = license.currentUses || 0;
+        const expirationDate = license.expirationDate ? new Date(license.expirationDate) : null;
+
+        return new License(status, licenseKey, groups, permissions, meta, maxUses, currentUses, expirationDate);
+    }
+
+    public async retrieveLicense(licenseKey: string): Promise<License | null> {
+        const response = await this.retry(() => this.retrieveLicenseRaw(licenseKey), this.retries);
+        if (!response) return null;
+
+        const object = JSON.parse(response);
+        const status = LicenseStatus[object.status as keyof typeof LicenseStatus] || LicenseStatus.INVALID;
+
+        if (status === LicenseStatus.INVALID) return null;
+
+        return this.parseLicense(status, object.license);
+    }
+
+    public setRetries(retries: number): void {
+        this.retries = retries;
+    }
+
+    public getRetries(): number {
+        return this.retries;
+    }
+
+    public getValidationKey(): string {
+        return this.validationKey;
+    }
+}