diff --git a/tests/test_api.py b/tests/test_api.py
new file mode 100644
index 0000000..454a6c2
--- /dev/null
+++ b/tests/test_api.py
@@ -0,0 +1,81 @@
+"""Tests for API commands module."""
+
+from unittest.mock import Mock, patch
+
+from devtoolbelt.commands.api import (
+    _parse_auth,
+    _parse_headers,
+    _resolve_url,
+)
+
+
+class TestAPiHelpers:
+    """Tests for API helper functions."""
+
+    def test_parse_headers_empty(self):
+        """Test parsing empty headers."""
+        result = _parse_headers(())
+        assert result == {}
+
+    def test_parse_headers_single(self):
+        """Test parsing single header."""
+        result = _parse_headers(("Content-Type: application/json",))
+        assert result == {"Content-Type": "application/json"}
+
+    def test_parse_headers_multiple(self):
+        """Test parsing multiple headers."""
+        result = _parse_headers((
+            "Content-Type: application/json",
+            "Authorization: Bearer token123"
+        ))
+        assert result == {
+            "Content-Type": "application/json",
+            "Authorization": "Bearer token123"
+        }
+
+    def test_parse_headers_with_spaces(self):
+        """Test parsing headers with extra spaces."""
+        result = _parse_headers(("X-Custom-Header : value ",))
+        assert result == {"X-Custom-Header": "value"}
+
+    def test_parse_auth_none(self):
+        """Test parsing no auth."""
+        result = _parse_auth(None)
+        assert result is None
+
+    def test_parse_auth_token(self):
+        """Test parsing token auth."""
+        result = _parse_auth("bearer-token-123")
+        assert result == ("bearer-token-123", "")
+
+    def test_parse_auth_user_password(self):
+        """Test parsing user:password auth."""
+        result = _parse_auth("user:password123")
+        assert result == ("user", "password123")
+
+    def test_resolve_url_direct(self):
+        """Test resolving direct URL."""
+        result = _resolve_url("https://api.example.com", None)
+        assert result == "https://api.example.com"
+
+    def test_resolve_url_named_from_config(self):
+        """Test resolving named endpoint from config."""
+        with patch('devtoolbelt.commands.api.get_config') as mock_get_config:
+            mock_config = Mock()
+            mock_config.get_api_endpoints.return_value = {
+                "myapi": "https://api.example.com/v1"
+            }
+            mock_get_config.return_value = mock_config
+
+            result = _resolve_url("myapi", None)
+            assert result == "https://api.example.com/v1"
+
+    def test_resolve_url_unknown_name(self):
+        """Test resolving unknown name falls back to URL."""
+        with patch('devtoolbelt.commands.api.get_config') as mock_get_config:
+            mock_config = Mock()
+            mock_config.get_api_endpoints.return_value = {}
+            mock_get_config.return_value = mock_config
+
+            result = _resolve_url("unknownname", None)
+            assert result == "unknownname"