diff --git a/apps/coordinator-api/tests/test_services_agent.py b/apps/coordinator-api/tests/test_services_agent.py
new file mode 100644
index 00000000..f4eed645
--- /dev/null
+++ b/apps/coordinator-api/tests/test_services_agent.py
@@ -0,0 +1,50 @@
+"""
+Tests for agent service
+"""
+
+import pytest
+from unittest.mock import Mock, patch
+
+
+@pytest.mark.unit
+class TestAgentService:
+    """Test agent service"""
+
+    @patch('app.services.agent_service.AITBCHTTPClient')
+    def test_get_agent_status(self, mock_client_class):
+        """Test getting agent status"""
+        # Setup mock
+        mock_client = Mock()
+        mock_client_class.return_value = mock_client
+        mock_client.get.return_value = {
+            "id": "agent1",
+            "name": "Agent 1",
+            "status": "active",
+            "current_task": None
+        }
+
+        # Import and test
+        from app.services.agent_service import get_agent_status
+        
+        result = get_agent_status("agent1")
+        assert result["id"] == "agent1"
+        assert result["status"] == "active"
+
+    @patch('app.services.agent_service.AITBCHTTPClient')
+    def test_register_agent(self, mock_client_class):
+        """Test registering a new agent"""
+        # Setup mock
+        mock_client = Mock()
+        mock_client_class.return_value = mock_client
+        mock_client.post.return_value = {
+            "id": "agent2",
+            "name": "Agent 2",
+            "status": "registered"
+        }
+
+        # Import and test
+        from app.services.agent_service import register_agent
+        
+        result = register_agent({"name": "Agent 2", "type": "compute"})
+        assert result["id"] == "agent2"
+        assert result["status"] == "registered"
diff --git a/apps/coordinator-api/tests/test_services_blockchain.py b/apps/coordinator-api/tests/test_services_blockchain.py
new file mode 100644
index 00000000..73131cfd
--- /dev/null
+++ b/apps/coordinator-api/tests/test_services_blockchain.py
@@ -0,0 +1,44 @@
+"""
+Tests for blockchain service
+"""
+
+import pytest
+from unittest.mock import Mock, patch
+
+
+@pytest.mark.unit
+class TestBlockchainService:
+    """Test blockchain service"""
+
+    @patch('app.services.blockchain.AITBCHTTPClient')
+    def test_get_block_height(self, mock_client_class):
+        """Test getting current block height"""
+        # Setup mock
+        mock_client = Mock()
+        mock_client_class.return_value = mock_client
+        mock_client.get.return_value = {"height": 1000}
+
+        # Import and test
+        from app.services.blockchain import get_block_height
+        
+        result = get_block_height()
+        assert result == 1000
+
+    @patch('app.services.blockchain.AITBCHTTPClient')
+    def test_get_block_by_hash(self, mock_client_class):
+        """Test getting block by hash"""
+        # Setup mock
+        mock_client = Mock()
+        mock_client_class.return_value = mock_client
+        mock_client.get.return_value = {
+            "hash": "0xabc123",
+            "height": 1000,
+            "timestamp": "2024-01-01T00:00:00Z"
+        }
+
+        # Import and test
+        from app.services.blockchain import get_block_by_hash
+        
+        result = get_block_by_hash("0xabc123")
+        assert result["hash"] == "0xabc123"
+        assert result["height"] == 1000
diff --git a/apps/coordinator-api/tests/test_services_marketplace.py b/apps/coordinator-api/tests/test_services_marketplace.py
new file mode 100644
index 00000000..b5fb6b85
--- /dev/null
+++ b/apps/coordinator-api/tests/test_services_marketplace.py
@@ -0,0 +1,52 @@
+"""
+Tests for marketplace service
+"""
+
+import pytest
+from unittest.mock import Mock, patch
+
+
+@pytest.mark.unit
+class TestMarketplaceService:
+    """Test marketplace service"""
+
+    @patch('app.services.marketplace.AITBCHTTPClient')
+    def test_list_marketplace_items(self, mock_client_class):
+        """Test listing marketplace items"""
+        # Setup mock
+        mock_client = Mock()
+        mock_client_class.return_value = mock_client
+        mock_client.get.return_value = {
+            "items": [
+                {"id": 1, "name": "GPU 1", "price": 0.50},
+                {"id": 2, "name": "GPU 2", "price": 0.75}
+            ],
+            "total": 2
+        }
+
+        # Import and test
+        from app.services.marketplace import list_marketplace_items
+        
+        result = list_marketplace_items()
+        assert result["total"] == 2
+        assert len(result["items"]) == 2
+
+    @patch('app.services.marketplace.AITBCHTTPClient')
+    def test_create_marketplace_item(self, mock_client_class):
+        """Test creating a marketplace item"""
+        # Setup mock
+        mock_client = Mock()
+        mock_client_class.return_value = mock_client
+        mock_client.post.return_value = {
+            "id": 3,
+            "name": "GPU 3",
+            "price": 1.00,
+            "status": "active"
+        }
+
+        # Import and test
+        from app.services.marketplace import create_marketplace_item
+        
+        result = create_marketplace_item({"name": "GPU 3", "price": 1.00})
+        assert result["id"] == 3
+        assert result["status"] == "active"