diff --git a/packages/core/src/config/config.ts b/packages/core/src/config/config.ts
index 9b16ed0..4a6f78b 100644
--- a/packages/core/src/config/config.ts
+++ b/packages/core/src/config/config.ts
@@ -1,4 +1,41 @@
+import type { LoggerService } from '@services/logger.service';
 import { injectable } from 'inversify';
+import { Env } from 'src';
 
 @injectable()
-export class CosmosConfig {}
+export class CosmosConfig {
+	constructor(private readonly loggerService: LoggerService) {}
+
+	/**
+	 * Get env variables
+	 */
+	public get<T>(value: string): T {
+		const envValue = process.env[value];
+
+		if (envValue === 'true') {
+			return true as T;
+		}
+
+		if (envValue === 'false') {
+			return false as T;
+		}
+
+		if (!Number.isNaN(Number(envValue))) {
+			return Number(envValue) as T;
+		}
+
+		return envValue as T;
+	}
+
+	/**
+	 * Validate if env key exist and then return it
+	 */
+	public getEnvKey(key: string) {
+		const envKey = Env.EnvKeys[key];
+		if (envKey) {
+			return envKey;
+		} else {
+			void this.loggerService.pino.warn(`${key} does not exist in you'r environnement`);
+		}
+	}
+}
diff --git a/packages/core/src/env/env.ts b/packages/core/src/env/env.ts
index 20fcc59..14f79d7 100644
--- a/packages/core/src/env/env.ts
+++ b/packages/core/src/env/env.ts
@@ -1,15 +1,33 @@
 import { injectable } from 'inversify';
 import z, { type SafeParseError, type ZodError } from 'zod';
-// Fixes the return error from the Zod library.
+
+/**
+ * Fixes the return error from the Zod library.
+ */
 function hashError(safeParseReturn: any): safeParseReturn is SafeParseError<ZodError<any>> {
 	return safeParseReturn?.error;
 }
 
 @injectable()
 export class Env {
+	/**
+	 * Access to zod library
+	 */
 	public static validator = z;
 
+	/**
+	 * Mapping of env key
+	 */
+	public static EnvKeys: { [key: string]: any } = {};
+
+	/**
+	 * Process and validate env variables
+	 */
 	public process(variables: { [key: string]: any }) {
+		for (const [envVariable, enValues] of Object.entries(variables)) {
+			Env.EnvKeys[envVariable] = envVariable;
+		}
+
 		const schema = z.object(variables);
 		const parsed = schema.safeParse(process.env);