diff --git a/source/packages/com_mokosuitefield/api/src/Controller/FieldEquipmentController.php b/source/packages/com_mokosuitefield/api/src/Controller/FieldEquipmentController.php
new file mode 100644
index 0000000..881eece
--- /dev/null
+++ b/source/packages/com_mokosuitefield/api/src/Controller/FieldEquipmentController.php
@@ -0,0 +1,178 @@
+<?php
+namespace Moko\Component\MokoSuiteField\Api\Controller;
+
+defined('_JEXEC') or die;
+
+use Joomla\CMS\Factory;
+use Joomla\CMS\MVC\Controller\BaseController;
+use Joomla\Database\DatabaseInterface;
+
+/**
+ * Equipment + Vehicles + Service Agreements API.
+ *
+ * GET    /equipment               — List equipment
+ * GET    /equipment/{id}          — Equipment detail with service history
+ * GET    /vehicles                — List vehicles (fleet)
+ * GET    /vehicles/{id}/stock     — Truck stock for a vehicle
+ * GET    /agreements              — List service agreements
+ * GET    /agreements/{id}         — Agreement detail with WO history
+ */
+class FieldEquipmentController extends BaseController
+{
+	private function requireAuth(string $action = 'core.manage'): void
+	{
+		$user = Factory::getApplication()->getIdentity();
+		if (!$user || $user->guest || (!$user->authorise('core.admin') && !$user->authorise($action, 'com_mokosuitefield'))) {
+			http_response_code(403);
+			echo json_encode(['error' => 'Access denied.']);
+			Factory::getApplication()->close();
+		}
+	}
+
+	public function listEquipment(): void
+	{
+		$this->requireAuth('core.manage');
+		$db = Factory::getContainer()->get(DatabaseInterface::class);
+		$input = Factory::getApplication()->getInput();
+
+		$query = $db->getQuery(true)
+			->select('eq.*, loc.name AS location_name, loc.address')
+			->select('cd.name AS customer_name')
+			->from($db->quoteName('#__mokosuitefield_equipment', 'eq'))
+			->join('LEFT', $db->quoteName('#__mokosuitefield_locations', 'loc') . ' ON loc.id = eq.location_id')
+			->join('LEFT', $db->quoteName('#__contact_details', 'cd') . ' ON cd.id = eq.contact_id')
+			->order('eq.name ASC');
+
+		$type = $input->getString('type', '');
+		if ($type) $query->where($db->quoteName('eq.type') . ' = ' . $db->quote($type));
+
+		$status = $input->getString('status', '');
+		if ($status) $query->where($db->quoteName('eq.status') . ' = ' . $db->quote($status));
+
+		$locationId = $input->getInt('location_id', 0);
+		if ($locationId) $query->where('eq.location_id = ' . $locationId);
+
+		$db->setQuery($query, 0, 100);
+		$this->sendJson($db->loadObjectList() ?: []);
+	}
+
+	public function getEquipment(): void
+	{
+		$this->requireAuth('core.manage');
+		$db = Factory::getContainer()->get(DatabaseInterface::class);
+		$id = Factory::getApplication()->getInput()->getInt('id', 0);
+
+		$db->setQuery($db->getQuery(true)
+			->select('eq.*, loc.name AS location_name, loc.address, cd.name AS customer_name')
+			->from($db->quoteName('#__mokosuitefield_equipment', 'eq'))
+			->join('LEFT', $db->quoteName('#__mokosuitefield_locations', 'loc') . ' ON loc.id = eq.location_id')
+			->join('LEFT', $db->quoteName('#__contact_details', 'cd') . ' ON cd.id = eq.contact_id')
+			->where('eq.id = ' . $id));
+		$equipment = $db->loadObject();
+
+		if (!$equipment) {
+			http_response_code(404);
+			$this->sendJson(['error' => 'Equipment not found']);
+			return;
+		}
+
+		// Service history
+		$db->setQuery($db->getQuery(true)
+			->select('wo.id, wo.wo_number, wo.description, wo.status, wo.completed_at, wo.trade')
+			->from($db->quoteName('#__mokosuitefield_work_orders', 'wo'))
+			->where('wo.equipment_id = ' . $id)
+			->order('wo.scheduled_date DESC'), 0, 20);
+		$equipment->service_history = $db->loadObjectList() ?: [];
+
+		$this->sendJson($equipment);
+	}
+
+	public function listVehicles(): void
+	{
+		$this->requireAuth('core.manage');
+		$db = Factory::getContainer()->get(DatabaseInterface::class);
+
+		$db->setQuery($db->getQuery(true)
+			->select('v.*, t_cd.name AS tech_name')
+			->from($db->quoteName('#__mokosuitefield_vehicles', 'v'))
+			->join('LEFT', $db->quoteName('#__mokosuitefield_technicians', 't') . ' ON t.id = v.technician_id')
+			->join('LEFT', $db->quoteName('#__contact_details', 't_cd') . ' ON t_cd.id = t.contact_id')
+			->order('v.vehicle_name ASC'));
+
+		$this->sendJson($db->loadObjectList() ?: []);
+	}
+
+	public function truckStock(): void
+	{
+		$this->requireAuth('core.manage');
+		$db = Factory::getContainer()->get(DatabaseInterface::class);
+		$vehicleId = Factory::getApplication()->getInput()->getInt('id', 0);
+
+		$db->setQuery($db->getQuery(true)
+			->select('ts.*, p.title AS product_name')
+			->from($db->quoteName('#__mokosuitefield_truck_stock', 'ts'))
+			->join('LEFT', $db->quoteName('#__mokosuite_crm_products', 'p') . ' ON p.id = ts.product_id')
+			->where('ts.vehicle_id = ' . $vehicleId)
+			->order('p.title ASC'));
+
+		$this->sendJson($db->loadObjectList() ?: []);
+	}
+
+	public function listAgreements(): void
+	{
+		$this->requireAuth('core.manage');
+		$db = Factory::getContainer()->get(DatabaseInterface::class);
+		$input = Factory::getApplication()->getInput();
+
+		$query = $db->getQuery(true)
+			->select('sa.*, cd.name AS customer_name, loc.address')
+			->from($db->quoteName('#__mokosuitefield_service_agreements', 'sa'))
+			->join('LEFT', $db->quoteName('#__contact_details', 'cd') . ' ON cd.id = sa.contact_id')
+			->join('LEFT', $db->quoteName('#__mokosuitefield_locations', 'loc') . ' ON loc.id = sa.location_id')
+			->order('sa.end_date ASC');
+
+		$status = $input->getString('status', '');
+		if ($status) $query->where($db->quoteName('sa.status') . ' = ' . $db->quote($status));
+
+		$db->setQuery($query, 0, 100);
+		$this->sendJson($db->loadObjectList() ?: []);
+	}
+
+	public function getAgreement(): void
+	{
+		$this->requireAuth('core.manage');
+		$db = Factory::getContainer()->get(DatabaseInterface::class);
+		$id = Factory::getApplication()->getInput()->getInt('id', 0);
+
+		$db->setQuery($db->getQuery(true)
+			->select('sa.*, cd.name AS customer_name, loc.name AS location_name, loc.address')
+			->from($db->quoteName('#__mokosuitefield_service_agreements', 'sa'))
+			->join('LEFT', $db->quoteName('#__contact_details', 'cd') . ' ON cd.id = sa.contact_id')
+			->join('LEFT', $db->quoteName('#__mokosuitefield_locations', 'loc') . ' ON loc.id = sa.location_id')
+			->where('sa.id = ' . $id));
+		$agreement = $db->loadObject();
+
+		if (!$agreement) {
+			http_response_code(404);
+			$this->sendJson(['error' => 'Agreement not found']);
+			return;
+		}
+
+		// Work orders under this agreement
+		$db->setQuery($db->getQuery(true)
+			->select('wo.id, wo.wo_number, wo.description, wo.status, wo.scheduled_date, wo.trade')
+			->from($db->quoteName('#__mokosuitefield_work_orders', 'wo'))
+			->where('wo.agreement_id = ' . $id)
+			->order('wo.scheduled_date DESC'), 0, 30);
+		$agreement->work_orders = $db->loadObjectList() ?: [];
+
+		$this->sendJson($agreement);
+	}
+
+	private function sendJson(mixed $data): void
+	{
+		header('Content-Type: application/json; charset=utf-8');
+		echo json_encode($data, JSON_THROW_ON_ERROR | JSON_UNESCAPED_UNICODE);
+		Factory::getApplication()->close();
+	}
+}
diff --git a/source/packages/com_mokosuitefield/api/src/Controller/FieldEstimatesController.php b/source/packages/com_mokosuitefield/api/src/Controller/FieldEstimatesController.php
new file mode 100644
index 0000000..5e598c9
--- /dev/null
+++ b/source/packages/com_mokosuitefield/api/src/Controller/FieldEstimatesController.php
@@ -0,0 +1,150 @@
+<?php
+namespace Moko\Component\MokoSuiteField\Api\Controller;
+
+defined('_JEXEC') or die;
+
+use Joomla\CMS\Factory;
+use Joomla\CMS\MVC\Controller\BaseController;
+use Joomla\Database\DatabaseInterface;
+
+/**
+ * Estimates + Route API.
+ *
+ * GET    /estimates             — List estimates
+ * POST   /estimates             — Create estimate from field
+ * PATCH  /estimates/{id}/status — Update estimate status (approve/reject)
+ * POST   /estimates/{id}/convert— Convert estimate to work order
+ * GET    /route/{techId}        — Get optimized daily route
+ * POST   /route/{techId}/optimize — Trigger route optimization
+ */
+class FieldEstimatesController extends BaseController
+{
+	private function requireAuth(string $action = 'core.manage'): void
+	{
+		$user = Factory::getApplication()->getIdentity();
+		if (!$user || $user->guest || (!$user->authorise('core.admin') && !$user->authorise($action, 'com_mokosuitefield'))) {
+			http_response_code(403);
+			echo json_encode(['error' => 'Access denied.']);
+			Factory::getApplication()->close();
+		}
+	}
+
+	public function listEstimates(): void
+	{
+		$this->requireAuth('core.manage');
+		$db = Factory::getContainer()->get(DatabaseInterface::class);
+		$input = Factory::getApplication()->getInput();
+
+		$query = $db->getQuery(true)
+			->select('e.*, cd.name AS customer_name, loc.address')
+			->from($db->quoteName('#__mokosuitefield_estimates', 'e'))
+			->join('LEFT', $db->quoteName('#__contact_details', 'cd') . ' ON cd.id = e.contact_id')
+			->join('LEFT', $db->quoteName('#__mokosuitefield_locations', 'loc') . ' ON loc.id = e.location_id')
+			->order('e.created DESC');
+
+		$status = $input->getString('status', '');
+		if ($status) $query->where($db->quoteName('e.status') . ' = ' . $db->quote($status));
+
+		$techId = $input->getInt('technician_id', 0);
+		if ($techId) $query->where('e.technician_id = ' . $techId);
+
+		$db->setQuery($query, 0, 100);
+		$this->sendJson($db->loadObjectList() ?: []);
+	}
+
+	public function createEstimate(): void
+	{
+		$this->requireAuth('core.create');
+		$input = Factory::getApplication()->getInput();
+
+		$estimateId = \Moko\Plugin\System\MokoSuiteField\Helper\EstimateHelper::createEstimate(
+			$input->getInt('contact_id', 0),
+			$input->getInt('location_id', 0),
+			$input->getString('trade', 'general'),
+			$input->getString('description', ''),
+			json_decode($input->getString('line_items', '[]'), true) ?: []
+		);
+
+		$this->sendJson(['success' => true, 'estimate_id' => $estimateId]);
+	}
+
+	public function updateStatus(): void
+	{
+		$this->requireAuth('core.edit');
+		$input = Factory::getApplication()->getInput();
+		$id = $input->getInt('id', 0);
+		$status = $input->getString('status', '');
+
+		if (!in_array($status, ['sent', 'approved', 'rejected', 'expired'])) {
+			http_response_code(400);
+			$this->sendJson(['error' => 'Invalid status']);
+			return;
+		}
+
+		$db = Factory::getContainer()->get(DatabaseInterface::class);
+		$update = (object) [
+			'id'     => $id,
+			'status' => $status,
+		];
+
+		if ($status === 'approved') {
+			$update->approved_at = Factory::getDate()->toSql();
+		}
+
+		$db->updateObject('#__mokosuitefield_estimates', $update, 'id');
+		$this->sendJson(['success' => true]);
+	}
+
+	public function convertToWorkOrder(): void
+	{
+		$this->requireAuth('core.create');
+		$id = Factory::getApplication()->getInput()->getInt('id', 0);
+
+		$woId = \Moko\Plugin\System\MokoSuiteField\Helper\EstimateHelper::convertToWorkOrder($id);
+
+		if (!$woId) {
+			http_response_code(400);
+			$this->sendJson(['error' => 'Could not convert estimate']);
+			return;
+		}
+
+		$this->sendJson(['success' => true, 'work_order_id' => $woId]);
+	}
+
+	public function getRoute(): void
+	{
+		$this->requireAuth('core.manage');
+		$techId = Factory::getApplication()->getInput()->getInt('tech_id', 0);
+		$date = Factory::getApplication()->getInput()->getString('date', date('Y-m-d'));
+
+		$route = \Moko\Plugin\System\MokoSuiteField\Helper\RouteHelper::getTechRoute($techId, $date);
+		$metrics = \Moko\Plugin\System\MokoSuiteField\Helper\RouteHelper::estimateRouteMetrics($techId, $date);
+
+		$this->sendJson([
+			'route'   => $route,
+			'metrics' => $metrics,
+		]);
+	}
+
+	public function optimizeRoute(): void
+	{
+		$this->requireAuth('core.manage');
+		$techId = Factory::getApplication()->getInput()->getInt('tech_id', 0);
+		$date = Factory::getApplication()->getInput()->getString('date', date('Y-m-d'));
+
+		$optimized = \Moko\Plugin\System\MokoSuiteField\Helper\RouteHelper::optimizeRoute($techId, $date);
+		$metrics = \Moko\Plugin\System\MokoSuiteField\Helper\RouteHelper::estimateRouteMetrics($techId, $date);
+
+		$this->sendJson([
+			'route'   => $optimized,
+			'metrics' => $metrics,
+		]);
+	}
+
+	private function sendJson(mixed $data): void
+	{
+		header('Content-Type: application/json; charset=utf-8');
+		echo json_encode($data, JSON_THROW_ON_ERROR | JSON_UNESCAPED_UNICODE);
+		Factory::getApplication()->close();
+	}
+}