diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index b52b69f170d6..0992f46358bc 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -24349,6 +24349,12 @@
     githubId = 52673095;
     name = "Syed Ahkam";
   };
+  sylonin = {
+    email = "syl@sperg.net";
+    github = "Sylonin";
+    githubId = 89575562;
+    name = "Sylonin";
+  };
   symphorien = {
     email = "symphorien_nixpkgs@xlumurb.eu";
     matrix = "@symphorien:xlumurb.eu";
diff --git a/pkgs/by-name/tl/tldx/package.nix b/pkgs/by-name/tl/tldx/package.nix
new file mode 100644
index 000000000000..4e52c3492d4e
--- /dev/null
+++ b/pkgs/by-name/tl/tldx/package.nix
@@ -0,0 +1,43 @@
+{
+  lib,
+  buildGoModule,
+  fetchFromGitHub,
+  nix-update-script,
+  versionCheckHook,
+}:
+
+buildGoModule (finalAttrs: {
+  pname = "tldx";
+  version = "1.2.4";
+
+  src = fetchFromGitHub {
+    owner = "brandonyoungdev";
+    repo = "tldx";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-inX/27nzju1ns6fKF3iFmgYOd8KpI/cLX+UM8LjeOVw=";
+  };
+
+  vendorHash = "sha256-gNU1YcvRXOvPsniZKE+XEQ7YaJTc5qjTRgCrnNMjfXw=";
+
+  ldflags = [
+    "-s"
+    "-w"
+    "-X github.com/brandonyoungdev/tldx/cmd.Version=${finalAttrs.version}"
+  ];
+
+  passthru.updateScript = nix-update-script { };
+
+  nativeInstallCheckInputs = [
+    versionCheckHook
+  ];
+  doInstallCheck = true;
+
+  meta = {
+    license = lib.licenses.asl20;
+    mainProgram = "tldx";
+    description = "Domain availability research tool";
+    homepage = "https://github.com/brandonyoungdev/tldx";
+    changelog = "https://github.com/brandonyoungdev/tldx/blob/main/CHANGELOG.md";
+    maintainers = with lib.maintainers; [ sylonin ];
+  };
+})