diff --git a/crates/api_clients/grok_client/src/requests/index_page/signature/mod.rs b/crates/api_clients/grok_client/src/requests/index_page/signature/mod.rs
index 794da944a6..c7306e3774 100644
--- a/crates/api_clients/grok_client/src/requests/index_page/signature/mod.rs
+++ b/crates/api_clients/grok_client/src/requests/index_page/signature/mod.rs
@@ -3,4 +3,6 @@ pub mod generate_sign_for_new_conversation;
 mod signature_xa;
 mod signature_simulate_style;
 mod signature_h;
-mod signature_cubic_bezier_eased;
\ No newline at end of file
+mod signature_cubic_bezier_eased;
+mod signature_to_hex;
+mod round_two_decimals;
\ No newline at end of file
diff --git a/crates/api_clients/grok_client/src/requests/index_page/signature/round_two_decimals.rs b/crates/api_clients/grok_client/src/requests/index_page/signature/round_two_decimals.rs
new file mode 100644
index 0000000000..79ef4be60a
--- /dev/null
+++ b/crates/api_clients/grok_client/src/requests/index_page/signature/round_two_decimals.rs
@@ -0,0 +1,19 @@
+
+pub fn round_two_decimals(f: f64) -> f64 {
+  // rounded = round(float(f), 2)
+  let rounded = (f * 100.0).round() / 100.0; // NB: Round to two places like Python
+  rounded
+}
+
+#[cfg(test)]
+mod tests {
+  use crate::requests::index_page::signature::round_two_decimals::round_two_decimals;
+
+  #[test]
+  fn test() {
+    assert_eq!(round_two_decimals(0.1234), 0.12);
+    assert_eq!(round_two_decimals(1.00001), 1.0);
+    assert_eq!(round_two_decimals(-5.0003), -5.0);
+    assert_eq!(round_two_decimals(1234.0001), 1234.0);
+  }
+}
\ No newline at end of file
diff --git a/crates/api_clients/grok_client/src/requests/index_page/signature/signature_h.rs b/crates/api_clients/grok_client/src/requests/index_page/signature/signature_h.rs
index e5be67d6db..e1e28be59d 100644
--- a/crates/api_clients/grok_client/src/requests/index_page/signature/signature_h.rs
+++ b/crates/api_clients/grok_client/src/requests/index_page/signature/signature_h.rs
@@ -1,5 +1,5 @@
 use crate::error::grok_client_error::GrokClientError;
-
+use crate::requests::index_page::signature::round_two_decimals::round_two_decimals;
 /*
     @staticmethod
     def _h(x: float, _param: float, c: float, e: bool):
@@ -32,7 +32,7 @@ pub fn signature_h(x: f64, param: f64, c: f64, e: bool) -> Result<f64, GrokClien
   }
 
   // rounded = round(float(f), 2)
-  let rounded = (f * 100.0).round() / 100.0; // NB: Round to two places like Python
+  let rounded = round_two_decimals(f);
 
   println!("rounded = {}", rounded);
 
diff --git a/crates/api_clients/grok_client/src/requests/index_page/signature/signature_to_hex.rs b/crates/api_clients/grok_client/src/requests/index_page/signature/signature_to_hex.rs
new file mode 100644
index 0000000000..76c5253740
--- /dev/null
+++ b/crates/api_clients/grok_client/src/requests/index_page/signature/signature_to_hex.rs
@@ -0,0 +1,78 @@
+use crate::error::grok_client_error::GrokClientError;
+use crate::requests::index_page::signature::round_two_decimals::round_two_decimals;
+/*
+    @staticmethod
+    def tohex(num: float) -> str:
+        rounded = round(float(num), 2)
+        if rounded == 0.0:
+            return "0"
+        sign = "-" if copysign(1.0, rounded) < 0 else ""
+        absval = abs(rounded)
+        intpart = int(floor(absval))
+        frac = absval - intpart
+        if frac == 0.0:
+            return sign + format(intpart, "x")
+        frac_digits = []
+        f = frac
+        for _ in range(20):
+            f *= 16
+            digit = int(floor(f + 1e-12))
+            frac_digits.append(format(digit, "x"))
+            f -= digit
+            if abs(f) < 1e-12:
+                break
+        frac_str = "".join(frac_digits).rstrip("0")
+        if frac_str == "":
+            return sign + format(intpart, "x")
+        return sign + format(intpart, "x") + "." + frac_str
+ */
+
+pub fn signature_to_hex(num: f64) -> Result<String, GrokClientError> {
+  // rounded = round(float(num), 2)
+  let rounded = round_two_decimals(num);
+
+  println!("rounded = {}", rounded);
+
+  if rounded == 0.0 {
+    return Ok("0".to_string());
+  }
+
+  // sign = "-" if copysign(1.0, rounded) < 0 else ""
+  let test = 1.0f64.copysign(rounded);
+  let sign = if test < 0.0 { "-" } else { "" };
+
+  println!("sign = {}", sign);
+
+  let absval = rounded.abs();
+  let intpart = absval.floor() as u32;
+
+  println!("absval = {}", absval);
+  println!("intpart = {}", intpart);
+
+  let frac = absval - (intpart as f64);
+
+  println!("frac = {}", frac);
+
+  if frac == 0.0 {
+    // return sign + format(intpart, "x") -- this is hex formatting
+    let ret = format!("{sign}{intpart:x}");
+    println!("return = {}", ret);
+    return Ok(ret);
+  }
+
+  Ok("".to_string())
+}
+
+#[cfg(test)]
+mod tests {
+  use crate::requests::index_page::signature::signature_to_hex::signature_to_hex;
+
+  #[test]
+  fn test_1() {
+    let num = 67.0;
+    let output = signature_to_hex(num).unwrap();
+    let expected = "43";
+
+    assert_eq!(&output, expected);
+  }
+}