diff --git a/library/src/commonMain/kotlin/io/vinicius/klopik/Header.kt b/library/src/commonMain/kotlin/io/vinicius/klopik/Header.kt
new file mode 100644
index 0000000..a5e1505
--- /dev/null
+++ b/library/src/commonMain/kotlin/io/vinicius/klopik/Header.kt
@@ -0,0 +1,47 @@
+package io.vinicius.klopik
+
+/**
+ * Enum class representing HTTP header.
+ *
+ * @property value The string representation of the HTTP header.
+ */
+enum class Header(val value: String) {
+    AIM("A-IM"),
+    Accept("Accept"),
+    AcceptCharset("Accept-Charset"),
+    AcceptDatetime("Accept-Datetime"),
+    AcceptEncoding("Accept-Encoding"),
+    AcceptLanguage("Accept-Language"),
+    AccessControlRequestMethod("Access-Control-Request-Method"),
+    AccessControlRequestHeaders("Access-Control-Request-Headers"),
+    Authorization("Authorization"),
+    CacheControl("Cache-Control"),
+    Connection("Connection"),
+    ContentEncoding("Content-Encoding"),
+    ContentLength("Content-Length"),
+    ContentType("Content-Type"),
+    Cookie("Cookie"),
+    Date("Date"),
+    Expect("Expect"),
+    Forwarded("Forwarded"),
+    From("From"),
+    Host("Host"),
+    IfMatch("If-Match"),
+    IfModifiedSince("If-Modified-Since"),
+    IfNoneMatch("If-None-Match"),
+    IfRange("If-Range"),
+    IfUnmodifiedSince("If-Unmodified-Since"),
+    MaxForwards("Max-Forwards"),
+    Origin("Origin"),
+    Pragma("Pragma"),
+    Prefer("Prefer"),
+    ProxyAuthorization("Proxy-Authorization"),
+    Range("Range"),
+    Referer("Referer"),
+    TE("TE"),
+    Trailer("Trailer"),
+    TransferEncoding("Transfer-Encoding"),
+    UserAgent("User-Agent"),
+    Upgrade("Upgrade"),
+    Via("Via"),
+}
\ No newline at end of file