diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 91e3af9..f93e67d 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -20,6 +20,8 @@ repos:
     hooks:
       - id: mypy
         exclude: '^(?:(?!src).)*$'
+        additional_dependencies:
+          - types-requests
   - repo: https://github.com/astral-sh/ruff-pre-commit
     rev: 'v0.1.3'
     hooks:
diff --git a/pyproject.toml b/pyproject.toml
index 7dd16d2..37c885f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,9 @@ build-backend = "setuptools.build_meta"
 name = "python-gitmojis"
 version = "0.0.0"
 requires-python = ">= 3.10"
-dependencies = []
+dependencies = [
+  "requests",
+]
 
 [project.optional-dependencies]
 dev = [
@@ -20,6 +22,7 @@ lint = [
   "black",
   "mypy",
   "ruff",
+  "types-requests",
 ]
 test = [
   "pytest",
diff --git a/src/gitmojis/__init__.py b/src/gitmojis/__init__.py
index faf89ac..55e7de1 100644
--- a/src/gitmojis/__init__.py
+++ b/src/gitmojis/__init__.py
@@ -1,6 +1,8 @@
+from .core import fetch_guide
 from .model import Gitmoji, Guide
 
 __all__ = [
     "Gitmoji",
     "Guide",
+    "fetch_guide",
 ]
diff --git a/src/gitmojis/core.py b/src/gitmojis/core.py
new file mode 100644
index 0000000..5bec8b6
--- /dev/null
+++ b/src/gitmojis/core.py
@@ -0,0 +1,27 @@
+import requests
+
+from . import defaults
+from .exceptions import ResponseJsonError
+from .model import Gitmoji, Guide
+
+
+def fetch_guide() -> Guide:
+    """Fetch the Gitmoji guide from the official Gitmoji API.
+
+    This function sends a GET request to the Gitmoji API to retrieve the current state
+    of the Gitmoji guide.
+
+    Returns:
+        A `Guide` object representing the current state of the Gitmoji API.
+
+    Raises:
+        ResponseJsonError: If the API response doesn't contain the expected JSON data.
+    """
+    response = requests.get(defaults.GITMOJI_API_URL)
+
+    if (gitmojis_json := response.json().get(defaults.GITMOJI_API_KEY)) is None:
+        raise ResponseJsonError
+
+    guide = Guide(gitmojis=[Gitmoji(**gitmoji_json) for gitmoji_json in gitmojis_json])
+
+    return guide
diff --git a/src/gitmojis/defaults.py b/src/gitmojis/defaults.py
new file mode 100644
index 0000000..e735cab
--- /dev/null
+++ b/src/gitmojis/defaults.py
@@ -0,0 +1,5 @@
+from typing import Final
+
+GITMOJI_API_URL: Final = "https://gitmoji.dev/api/gitmojis"
+
+GITMOJI_API_KEY: Final = "gitmojis"
diff --git a/src/gitmojis/exceptions.py b/src/gitmojis/exceptions.py
new file mode 100644
index 0000000..75f4ad3
--- /dev/null
+++ b/src/gitmojis/exceptions.py
@@ -0,0 +1,13 @@
+class GitmojisException(Exception):
+    message: str
+
+    def __init__(self, message: str | None = None) -> None:
+        super().__init__(message or getattr(self.__class__, "message", ""))
+
+
+class ApiError(GitmojisException):
+    pass
+
+
+class ResponseJsonError(ApiError):
+    message = "unsupported format of the JSON data returned by the API"
diff --git a/tests/test_core.py b/tests/test_core.py
new file mode 100644
index 0000000..cf28e9b
--- /dev/null
+++ b/tests/test_core.py
@@ -0,0 +1,31 @@
+import pytest
+import requests
+
+from gitmojis import defaults
+from gitmojis.core import fetch_guide
+from gitmojis.exceptions import ResponseJsonError
+from gitmojis.model import Guide
+
+
+@pytest.fixture()
+def response(mocker):
+    return mocker.Mock(spec_set=requests.Response)
+
+
+def test_fetch_guide_creates_guide_from_api_response_json(mocker, response):
+    response.json.return_value = {defaults.GITMOJI_API_KEY: []}
+
+    mocker.patch("requests.get", return_value=response)
+
+    guide = fetch_guide()
+
+    assert isinstance(guide, Guide)
+
+
+def test_fetch_guide_raises_error_if_gitmoji_api_key_not_in_response_json(mocker, response):  # fmt: skip
+    response.json.return_value = {}  # `GITMOJI_API_KEY` not in the response's JSON
+
+    mocker.patch("requests.get", return_value=response)
+
+    with pytest.raises(ResponseJsonError):
+        fetch_guide()