diff --git a/src/index.ts b/src/index.ts
index 90fc6b8..13313f6 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,5 +1,11 @@
 import { splitCookiesString } from "set-cookie-parser";
 
+export const findValueBetween = (plain: string, start: string, end: string): string => {
+  const startIndex = plain.indexOf(start) + start.length;
+  const endIndex = plain.indexOf(end, startIndex);
+  return plain.slice(startIndex, endIndex);
+};
+
 interface HeadersLike {
   get (key: string): string | null
 };