diff --git a/docs/operate/prometheus.rst b/docs/operate/prometheus.rst
new file mode 100644
index 00000000..2a912afc
--- /dev/null
+++ b/docs/operate/prometheus.rst
@@ -0,0 +1,30 @@
+Prometheus
+==========
+
+.. warning::
+
+    This feature is mostly for internal use for now, and although we'll keep a prometheus integration in the future,
+    configuration will change.
+
+Enable the middleware using ...
+
+.. code-block:: bash
+
+    USE_ASGI_PROMETHEUS_MIDDLEWARE=true harp ...
+
+Then you can access the metrics at ``/.prometheus/metrics``.
+
+Here is an example scrape configuration for prometheus:
+
+.. code-block:: yaml
+
+    scrape_configs:
+      - job_name: harp
+        honor_timestamps: true
+        scrape_interval: 10s
+        scrape_timeout: 10s
+        metrics_path: /.prometheus/metrics
+        scheme: http
+        static_configs:
+          - targets:
+              - url.or.ip.for.harp.example.com:4080
diff --git a/harp/config/adapters/hypercorn.py b/harp/config/adapters/hypercorn.py
index 1354472e..9994d521 100644
--- a/harp/config/adapters/hypercorn.py
+++ b/harp/config/adapters/hypercorn.py
@@ -5,6 +5,7 @@
 from hypercorn.utils import LifespanFailureError
 
 from harp import get_logger
+from harp.utils.env import get_bool_from_env
 
 logger = get_logger(__name__)
 
@@ -34,11 +35,19 @@ async def serve(self):
         from hypercorn.asyncio import serve
 
         asgi_app, binds = await self.factory.build()
+
+        if get_bool_from_env("USE_ASGI_PROMETHEUS_MIDDLEWARE", False):
+            from asgi_prometheus import PrometheusMiddleware
+
+            _metrics_url = "/.prometheus/metrics"
+            asgi_app = PrometheusMiddleware(asgi_app, metrics_url=_metrics_url, group_paths=["/"])
+            logger.info(f"🌎 PrometheusMiddleware enabled, metrics under {_metrics_url}.")
+
         config = self._create_config(binds)
         logger.debug(f"🌎 {type(self).__name__}::serve({', '.join(config.bind)})")
 
         try:
-            return await serve(asgi_app, config)
+            return await serve(asgi_app, config, mode="asgi")
         except LifespanFailureError as exc:
             logger.exception(f"Server initiliation failed: {repr(exc.__cause__)}", exc_info=exc.__cause__)
             if isinstance(exc.__cause__, PostgresError):
diff --git a/harp/utils/env.py b/harp/utils/env.py
index b59100a5..ff81ce85 100644
--- a/harp/utils/env.py
+++ b/harp/utils/env.py
@@ -20,6 +20,6 @@ def get_bool_from_env(key, default):
         return default
 
     try:
-        return cast_bool(key)
+        return cast_bool(value)
     except ValueError:
         raise ValueError(f"Invalid boolean value for {key}: {value!r}")
diff --git a/harp/utils/tests/test_env.py b/harp/utils/tests/test_env.py
new file mode 100644
index 00000000..2ab27d08
--- /dev/null
+++ b/harp/utils/tests/test_env.py
@@ -0,0 +1,28 @@
+from unittest.mock import patch
+
+import pytest
+
+from harp.utils.env import cast_bool, get_bool_from_env
+
+parametrize_with_string_booleans = pytest.mark.parametrize(
+    "value, expected",
+    [
+        ("true", True),
+        ("yes", True),
+        ("1", True),
+        ("false", False),
+        ("no", False),
+        ("0", False),
+    ],
+)
+
+
+@parametrize_with_string_booleans
+def test_cast_bool(value, expected):
+    assert cast_bool(value) == expected
+
+
+@parametrize_with_string_booleans
+def test_get_bool_from_env(value, expected):
+    with patch.dict("os.environ", {"TEST_ENV_VAR": value}):
+        assert get_bool_from_env("TEST_ENV_VAR", False) == expected
diff --git a/poetry.lock b/poetry.lock
index 9eea1da7..029151a9 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -224,6 +224,25 @@ doc = ["Sphinx (>=7)", "packaging", "sphinx-autodoc-typehints (>=1.2.0)", "sphin
 test = ["anyio[trio]", "coverage[toml] (>=7)", "exceptiongroup (>=1.2.0)", "hypothesis (>=4.0)", "psutil (>=5.9)", "pytest (>=7.0)", "pytest-mock (>=3.6.1)", "trustme", "uvloop (>=0.17)"]
 trio = ["trio (>=0.23)"]
 
+[[package]]
+name = "asgi-prometheus"
+version = "1.1.2"
+description = "Support Prometheus metrics for ASGI applications"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "asgi-prometheus-1.1.2.tar.gz", hash = "sha256:bcfe83b8c1391378ab7826b9ea5171e779d83e09407c7d9f84028f909361fd73"},
+    {file = "asgi_prometheus-1.1.2-py3-none-any.whl", hash = "sha256:8199c6ed19b4f71065e3e5e9f12cb26d647f2c57e9f682f35eb48a212be74e7b"},
+]
+
+[package.dependencies]
+asgi-tools = ">=0.71.0"
+prometheus-client = ">=0.10.1"
+
+[package.extras]
+dev = ["bump2version", "pre-commit", "refurb", "tox"]
+tests = ["pytest", "pytest-aio[curio,trio] (>=1.1.0)", "pytest-mypy", "ruff"]
+
 [[package]]
 name = "asgi-tools"
 version = "0.76.0"
@@ -1941,6 +1960,20 @@ files = [
     {file = "priority-2.0.0.tar.gz", hash = "sha256:c965d54f1b8d0d0b19479db3924c7c36cf672dbf2aec92d43fbdaf4492ba18c0"},
 ]
 
+[[package]]
+name = "prometheus-client"
+version = "0.20.0"
+description = "Python client for the Prometheus monitoring system."
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "prometheus_client-0.20.0-py3-none-any.whl", hash = "sha256:cde524a85bce83ca359cc837f28b8c0db5cac7aa653a588fd7e84ba061c329e7"},
+    {file = "prometheus_client-0.20.0.tar.gz", hash = "sha256:287629d00b147a32dcb2be0b9df905da599b2d82f80377083ec8463309a4bb89"},
+]
+
+[package.extras]
+twisted = ["twisted"]
+
 [[package]]
 name = "psutil"
 version = "5.9.8"
@@ -3642,4 +3675,4 @@ dev = ["honcho", "watchfiles"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.12"
-content-hash = "d5c888e9d669af3a02ed55feee4639bc2fb6b63d61cf806f176cd92f4fa92bf7"
+content-hash = "8409ac0a705f380703c200f7c7b405e002e86725ce4a5b3fc6a3110e36b39ea3"
diff --git a/pyproject.toml b/pyproject.toml
index 741b4697..a383dcd3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -47,6 +47,7 @@ svix-ksuid = "^0.6.2"
 watchfiles = { version = "^0.22.0", optional = true }
 whistle = { version = "2.0.0b1", allow-prereleases = true }
 pyheck = "^0.1.5"
+asgi-prometheus = "^1.1.2"
 
 
 [tool.poetry.group.dev.dependencies]