diff --git a/pkgs/development/ocaml-modules/httpcats/default.nix b/pkgs/development/ocaml-modules/httpcats/default.nix
new file mode 100644
index 000000000000..64b81403b8ce
--- /dev/null
+++ b/pkgs/development/ocaml-modules/httpcats/default.nix
@@ -0,0 +1,57 @@
+{
+  fetchFromGitHub,
+  buildDunePackage,
+  lib,
+  logs,
+  miou,
+  fmt,
+  h2,
+  h1,
+  ca-certs,
+  bstr,
+  tls-miou-unix,
+  dns-client-miou-unix,
+  happy-eyeballs-miou-unix,
+  mirage-crypto-rng-miou-unix,
+  alcotest,
+  digestif,
+}:
+
+buildDunePackage (finalAttrs: {
+  pname = "httpcats";
+  version = "0.1.0";
+
+  src = fetchFromGitHub {
+    owner = "robur-coop";
+    repo = "httpcats";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-t3gSfv73XYntle1dd4k9bv893pGStk1NHz62mAvcHAs=";
+  };
+
+  propagatedBuildInputs = [
+    h2
+    h1
+    ca-certs
+    bstr
+    tls-miou-unix
+    dns-client-miou-unix
+    happy-eyeballs-miou-unix
+  ];
+
+  doCheck = true;
+  checkInputs = [
+    logs
+    fmt
+    mirage-crypto-rng-miou-unix
+    alcotest
+    digestif
+  ];
+
+  meta = {
+    inherit (finalAttrs.src.meta) homepage;
+    description = "A simple HTTP client / server using h1, h2, and miou";
+    changelog = "https://github.com/robur-coop/httpcats/blob/${finalAttrs.src.tag}/CHANGES.md";
+    license = lib.licenses.bsd3;
+    maintainers = with lib.maintainers; [ rpqt ];
+  };
+})
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 7d636a8f1652..a73509d8cd22 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -825,6 +825,8 @@ let
 
         httpaf-lwt-unix = callPackage ../development/ocaml-modules/httpaf/lwt-unix.nix { };
 
+        httpcats = callPackage ../development/ocaml-modules/httpcats { };
+
         httpun = callPackage ../development/ocaml-modules/httpun { };
 
         httpun-eio = callPackage ../development/ocaml-modules/httpun/eio.nix { };