diff --git a/src/scripts/classes/errors.ts b/src/scripts/classes/errors.ts
new file mode 100644
index 0000000..fb01bf5
--- /dev/null
+++ b/src/scripts/classes/errors.ts
@@ -0,0 +1,44 @@
+"use strict";
+
+interface IBaseError {
+    /**
+     * Unique identifier of the error.
+     */
+    id: number,
+    /**
+     * Error message.
+     */
+    message: string,
+    /**
+     * Error to report.
+     */
+    error: Error,
+}
+
+export class GenericAxiosError extends Error implements IBaseError {
+    id: number;
+    message: string;
+    error: Error;
+
+    constructor(args: IBaseError) {
+        super();
+        this.id = args.id;
+        this.message = args.message;
+        this.error = args.error;
+    }
+}
+
+export class UnexpectedResponseContentType extends Error implements IBaseError {
+    id: number;
+    message: string;
+    error: Error;
+
+    constructor(args: IBaseError) {
+        super();
+        this.id = args.id;
+        this.message = args.message;
+        this.error = args.error;
+    }
+}
+
+export class InvalidF95Token extends Error {}