diff --git a/docs/api.rst b/docs/api.rst
index 0b6de71..464f786 100644
--- a/docs/api.rst
+++ b/docs/api.rst
@@ -7,12 +7,12 @@ API reference
 Exceptions
 ==========
 
-.. autoclass:: BrregException
+.. autoclass:: BrregError
    :members:
    :undoc-members:
 
 
-.. autoclass:: BrregRestException
+.. autoclass:: BrregRestError
    :members:
    :undoc-members:
 
@@ -22,7 +22,9 @@ Enhetsregisteret
 
 .. automodule:: brreg.enhetsregisteret
 
-.. autofunction:: brreg.enhetsregisteret.get_enhet
+.. autoclass:: brreg.enhetsregisteret.Client
+   :members:
+   :undoc-members:
 
 .. autoclass:: brreg.enhetsregisteret.Enhet
    :members:
diff --git a/docs/quickstart.rst b/docs/quickstart.rst
index 54a7b57..03c669f 100644
--- a/docs/quickstart.rst
+++ b/docs/quickstart.rst
@@ -11,8 +11,9 @@ Organization details by organization number
 
 To get details about an organization ("enhet") given its organization number:
 
->>> from brreg import enhetsregisteret
->>> enhet = enhetsregisteret.get_enhet('915501680')
+>>> from brreg.enhetsregisteret import Client
+>>> client = Client()
+>>> enhet = client.get_enhet('915501680')
 >>> enhet.organisasjonsnummer
 '915501680'
 >>> enhet.navn
diff --git a/src/brreg/enhetsregisteret/__init__.py b/src/brreg/enhetsregisteret/__init__.py
index ea17f7c..7148bcc 100644
--- a/src/brreg/enhetsregisteret/__init__.py
+++ b/src/brreg/enhetsregisteret/__init__.py
@@ -3,7 +3,7 @@
 See https://data.brreg.no/enhetsregisteret/api/docs/index.html for API details.
 """
 
-from brreg.enhetsregisteret._client import get_enhet
+from brreg.enhetsregisteret._client import Client
 from brreg.enhetsregisteret._types import (
     Adresse,
     Enhet,
@@ -14,7 +14,7 @@
 
 __all__ = [
     # From _client module:
-    "get_enhet",
+    "Client",
     # From _types module:
     "Adresse",
     "Enhet",
diff --git a/src/brreg/enhetsregisteret/_client.py b/src/brreg/enhetsregisteret/_client.py
index 252f763..39f157d 100644
--- a/src/brreg/enhetsregisteret/_client.py
+++ b/src/brreg/enhetsregisteret/_client.py
@@ -1,39 +1,65 @@
-from typing import Optional
+from __future__ import annotations
+
+from typing import TYPE_CHECKING, Optional
 
 import httpx
 
 from brreg import BrregError, BrregRestError
+from brreg.enhetsregisteret._types import Enhet
+
+if TYPE_CHECKING:
+    from types import TracebackType
+
 
-from ._types import Enhet
+class Client:
+    client: httpx.Client
 
-BASE_URL = "https://data.brreg.no/enhetsregisteret/api"
+    def __new__(cls) -> Client:
+        self = super().__new__(cls)
+        self.open()
+        return self
 
+    def __enter__(self) -> Client:
+        return self
 
-def get_enhet(organisasjonsnummer: str) -> Optional[Enhet]:
-    """Get :class:`Enhet` given an organization number.
+    def __exit__(
+        self,
+        exc_type: type[BaseException] | None = None,
+        exc_value: BaseException | None = None,
+        traceback: TracebackType | None = None,
+    ) -> None:
+        self.close()
 
-    Returns :class:`None` if Enhet is gone or not found
-    Returns :class:`Enhet` if Enhet is found
+    def open(self) -> None:
+        self.client = httpx.Client(
+            base_url="https://data.brreg.no/enhetsregisteret/api",
+        )
 
-    Raises :class:`BrregRestException` if a REST exception occures
-    Raises :class:`BrregException` if an unhandled exception occures
-    """
-    res: Optional[httpx.Response] = None
-    try:
-        res = httpx.get(f"{BASE_URL}/enheter/{organisasjonsnummer}")
+    def close(self) -> None:
+        self.client.close()
 
-        if res.status_code in (404, 410):
-            return None
+    def get_enhet(self, organisasjonsnummer: str) -> Optional[Enhet]:
+        """Get :class:`Enhet` given an organization number.
 
-        res.raise_for_status()
+        Returns :class:`None` if Enhet is gone or not found.
+        Returns :class:`Enhet` if Enhet is found.
 
-        return Enhet.from_json(res.json())
-    except httpx.HTTPError as exc:
-        raise BrregRestError(
-            str(exc),
-            method=(exc.request.method if exc.request else None),
-            url=(str(exc.request.url) if exc.request else None),
-            status_code=(res.status_code if res else None),
-        ) from exc
-    except Exception as exc:
-        raise BrregError(exc) from exc
+        Raises :class:`BrregRestError` if a REST error occurs.
+        Raises :class:`BrregError` if an unhandled exception occurs.
+        """
+        res: Optional[httpx.Response] = None
+        try:
+            res = self.client.get(f"/enheter/{organisasjonsnummer}")
+            if res.status_code in (404, 410):
+                return None
+            res.raise_for_status()
+            return Enhet.from_json(res.json())
+        except httpx.HTTPError as exc:
+            raise BrregRestError(
+                str(exc),
+                method=(exc.request.method if exc.request else None),
+                url=(str(exc.request.url) if exc.request else None),
+                status_code=(res.status_code if res else None),
+            ) from exc
+        except Exception as exc:
+            raise BrregError(exc) from exc
diff --git a/tests/test_enhetsregisteret.py b/tests/test_enhetsregisteret.py
index 0bf1455..1ad8213 100644
--- a/tests/test_enhetsregisteret.py
+++ b/tests/test_enhetsregisteret.py
@@ -19,7 +19,7 @@ def test_get_enhet(
         content=organization_details_response,
     )
 
-    org = enhetsregisteret.get_enhet("818511752")
+    org = enhetsregisteret.Client().get_enhet("818511752")
 
     assert org is not None
     assert org.organisasjonsnummer == "818511752"
@@ -65,7 +65,7 @@ def test_get_enhet_when_deleted(
         content=deleted_organization_details_response,
     )
 
-    org = enhetsregisteret.get_enhet("815597222")
+    org = enhetsregisteret.Client().get_enhet("815597222")
 
     assert org is not None
     assert org.organisasjonsnummer == "815597222"
@@ -86,7 +86,7 @@ def test_get_enhet_when_gone(
         headers={"content-type": "application/json"},
     )
 
-    org = enhetsregisteret.get_enhet("818511752")
+    org = enhetsregisteret.Client().get_enhet("818511752")
 
     assert org is None
 
@@ -101,7 +101,7 @@ def test_get_enhet_when_not_found(
         headers={"content-type": "application/json"},
     )
 
-    org = enhetsregisteret.get_enhet("818511752")
+    org = enhetsregisteret.Client().get_enhet("818511752")
 
     assert org is None
 
@@ -117,7 +117,7 @@ def test_get_enhet_when_http_error(
     )
 
     with pytest.raises(BrregRestError) as exc_info:
-        enhetsregisteret.get_enhet("818511752")
+        enhetsregisteret.Client().get_enhet("818511752")
 
     assert "REST API exception" in str(exc_info.value)
     assert "Bad Request" in str(exc_info.value)
@@ -138,7 +138,7 @@ def test_get_organization_by_number_when_http_timeout(
     )
 
     with pytest.raises(BrregRestError) as exc_info:
-        enhetsregisteret.get_enhet("818511752")
+        enhetsregisteret.Client().get_enhet("818511752")
 
     assert "REST API exception" in str(exc_info.value)
     assert "Connection refused" in str(exc_info.value)