diff --git a/__tests__/api/agents/lineage.test.ts b/__tests__/api/agents/lineage.test.ts
new file mode 100644
index 0000000..e3564b0
--- /dev/null
+++ b/__tests__/api/agents/lineage.test.ts
@@ -0,0 +1,259 @@
+/**
+ * PlantLineageAgent API Tests
+ * Tests for lineage agent API endpoints
+ */
+
+import { PlantLineageAgent, getPlantLineageAgent } from '../../../lib/agents';
+import { getBlockchain, initializeBlockchain } from '../../../lib/blockchain/manager';
+
+describe('PlantLineageAgent API', () => {
+  let agent: PlantLineageAgent;
+
+  beforeEach(() => {
+    // Get fresh agent instance
+    agent = getPlantLineageAgent();
+  });
+
+  afterEach(async () => {
+    // Ensure agent is stopped after each test
+    if (agent.status === 'running') {
+      await agent.stop();
+    }
+  });
+
+  describe('GET /api/agents/lineage', () => {
+    it('should return agent status and configuration', () => {
+      expect(agent.config.id).toBe('plant-lineage-agent');
+      expect(agent.config.name).toBe('Plant Lineage Agent');
+      expect(agent.config.description).toBeDefined();
+      expect(agent.config.priority).toBe('high');
+      expect(agent.config.intervalMs).toBe(60000);
+    });
+
+    it('should return current metrics', () => {
+      const metrics = agent.getMetrics();
+
+      expect(metrics.agentId).toBe('plant-lineage-agent');
+      expect(metrics.tasksCompleted).toBeGreaterThanOrEqual(0);
+      expect(metrics.tasksFailed).toBeGreaterThanOrEqual(0);
+      expect(metrics.averageExecutionMs).toBeGreaterThanOrEqual(0);
+    });
+
+    it('should return network statistics', () => {
+      const networkStats = agent.getNetworkStats();
+
+      expect(networkStats.totalPlants).toBeGreaterThanOrEqual(0);
+      expect(networkStats.totalLineages).toBeGreaterThanOrEqual(0);
+      expect(networkStats.avgGenerationDepth).toBeGreaterThanOrEqual(0);
+      expect(networkStats.avgLineageSize).toBeGreaterThanOrEqual(0);
+      expect(networkStats.geographicSpread).toBeGreaterThanOrEqual(0);
+    });
+
+    it('should return anomaly summary', () => {
+      const anomalies = agent.getAnomalies();
+
+      expect(Array.isArray(anomalies)).toBe(true);
+    });
+  });
+
+  describe('POST /api/agents/lineage', () => {
+    it('should start agent successfully', async () => {
+      expect(agent.status).toBe('idle');
+
+      await agent.start();
+
+      expect(agent.status).toBe('running');
+    });
+
+    it('should stop agent successfully', async () => {
+      await agent.start();
+      expect(agent.status).toBe('running');
+
+      await agent.stop();
+
+      expect(agent.status).toBe('idle');
+    });
+
+    it('should pause and resume agent', async () => {
+      await agent.start();
+      expect(agent.status).toBe('running');
+
+      agent.pause();
+      expect(agent.status).toBe('paused');
+
+      agent.resume();
+      expect(agent.status).toBe('running');
+    });
+
+    it('should handle start when already running', async () => {
+      await agent.start();
+      const firstStatus = agent.status;
+
+      await agent.start(); // Should not throw
+
+      expect(agent.status).toBe(firstStatus);
+    });
+  });
+
+  describe('GET /api/agents/lineage/[plantId]', () => {
+    it('should return null for non-existent plant analysis', () => {
+      const analysis = agent.getLineageAnalysis('non-existent-plant-id');
+
+      expect(analysis).toBeNull();
+    });
+
+    it('should return analysis structure when available', () => {
+      // Analysis would be populated after agent runs
+      // For now, test the structure expectations
+      const analysis = agent.getLineageAnalysis('test-plant-id');
+
+      // Should return null for non-cached plant
+      expect(analysis).toBeNull();
+    });
+  });
+
+  describe('GET /api/agents/lineage/anomalies', () => {
+    it('should return empty array when no anomalies', () => {
+      const anomalies = agent.getAnomalies();
+
+      expect(Array.isArray(anomalies)).toBe(true);
+    });
+
+    it('should support filtering by severity', () => {
+      const allAnomalies = agent.getAnomalies();
+
+      const highSeverity = allAnomalies.filter(a => a.severity === 'high');
+      const mediumSeverity = allAnomalies.filter(a => a.severity === 'medium');
+      const lowSeverity = allAnomalies.filter(a => a.severity === 'low');
+
+      expect(highSeverity.length + mediumSeverity.length + lowSeverity.length).toBe(allAnomalies.length);
+    });
+
+    it('should support filtering by type', () => {
+      const allAnomalies = agent.getAnomalies();
+      const validTypes = ['orphan', 'circular', 'invalid_generation', 'missing_parent', 'suspicious_location'];
+
+      for (const anomaly of allAnomalies) {
+        expect(validTypes).toContain(anomaly.type);
+      }
+    });
+  });
+
+  describe('Agent Lifecycle', () => {
+    it('should track uptime correctly', async () => {
+      const initialMetrics = agent.getMetrics();
+      const initialUptime = initialMetrics.uptime;
+
+      await agent.start();
+
+      // Wait a bit
+      await new Promise(resolve => setTimeout(resolve, 100));
+
+      const runningMetrics = agent.getMetrics();
+      expect(runningMetrics.uptime).toBeGreaterThan(initialUptime);
+    });
+
+    it('should maintain metrics across start/stop cycles', async () => {
+      await agent.start();
+      await agent.stop();
+
+      const metrics = agent.getMetrics();
+      expect(metrics.uptime).toBeGreaterThan(0);
+    });
+  });
+
+  describe('Alert Management', () => {
+    it('should return alerts array', () => {
+      const alerts = agent.getAlerts();
+
+      expect(Array.isArray(alerts)).toBe(true);
+    });
+
+    it('should have proper alert structure', () => {
+      const alerts = agent.getAlerts();
+
+      for (const alert of alerts) {
+        expect(alert.id).toBeDefined();
+        expect(alert.agentId).toBe('plant-lineage-agent');
+        expect(alert.severity).toBeDefined();
+        expect(alert.title).toBeDefined();
+        expect(alert.message).toBeDefined();
+        expect(alert.timestamp).toBeDefined();
+        expect(typeof alert.acknowledged).toBe('boolean');
+      }
+    });
+  });
+
+  describe('Error Handling', () => {
+    it('should handle agent operations gracefully', async () => {
+      // Test that agent doesn't throw on basic operations
+      expect(() => agent.getMetrics()).not.toThrow();
+      expect(() => agent.getAnomalies()).not.toThrow();
+      expect(() => agent.getNetworkStats()).not.toThrow();
+      expect(() => agent.getAlerts()).not.toThrow();
+    });
+
+    it('should handle pause on non-running agent', () => {
+      expect(agent.status).toBe('idle');
+
+      agent.pause(); // Should not throw
+
+      // Status should remain idle (only pauses if running)
+      expect(agent.status).toBe('idle');
+    });
+
+    it('should handle resume on non-paused agent', () => {
+      expect(agent.status).toBe('idle');
+
+      agent.resume(); // Should not throw
+
+      // Status should remain idle (only resumes if paused)
+      expect(agent.status).toBe('idle');
+    });
+  });
+
+  describe('Response Format', () => {
+    it('should return consistent metrics format', () => {
+      const metrics = agent.getMetrics();
+
+      expect(typeof metrics.agentId).toBe('string');
+      expect(typeof metrics.tasksCompleted).toBe('number');
+      expect(typeof metrics.tasksFailed).toBe('number');
+      expect(typeof metrics.averageExecutionMs).toBe('number');
+      expect(typeof metrics.uptime).toBe('number');
+      expect(Array.isArray(metrics.errors)).toBe(true);
+    });
+
+    it('should return consistent network stats format', () => {
+      const stats = agent.getNetworkStats();
+
+      expect(typeof stats.totalPlants).toBe('number');
+      expect(typeof stats.totalLineages).toBe('number');
+      expect(typeof stats.avgGenerationDepth).toBe('number');
+      expect(typeof stats.avgLineageSize).toBe('number');
+      expect(typeof stats.geographicSpread).toBe('number');
+    });
+  });
+});
+
+describe('PlantLineageAgent Integration', () => {
+  it('should be accessible via singleton', () => {
+    const agent1 = getPlantLineageAgent();
+    const agent2 = getPlantLineageAgent();
+
+    expect(agent1).toBe(agent2);
+  });
+
+  it('should have correct priority', () => {
+    const agent = getPlantLineageAgent();
+
+    expect(agent.config.priority).toBe('high');
+  });
+
+  it('should have correct interval', () => {
+    const agent = getPlantLineageAgent();
+
+    // Should run every minute
+    expect(agent.config.intervalMs).toBe(60000);
+  });
+});
diff --git a/pages/api/agents/lineage/[plantId].ts b/pages/api/agents/lineage/[plantId].ts
new file mode 100644
index 0000000..ca302ef
--- /dev/null
+++ b/pages/api/agents/lineage/[plantId].ts
@@ -0,0 +1,85 @@
+/**
+ * API Route: Get lineage analysis for a specific plant
+ * GET /api/agents/lineage/[plantId]
+ */
+
+import type { NextApiRequest, NextApiResponse } from 'next';
+import { getPlantLineageAgent } from '../../../../lib/agents';
+import { getBlockchain } from '../../../../lib/blockchain/manager';
+
+export default async function handler(
+  req: NextApiRequest,
+  res: NextApiResponse
+) {
+  if (req.method !== 'GET') {
+    return res.status(405).json({ success: false, error: 'Method not allowed' });
+  }
+
+  try {
+    const { plantId } = req.query;
+
+    if (!plantId || typeof plantId !== 'string') {
+      return res.status(400).json({ success: false, error: 'Invalid plant ID' });
+    }
+
+    // Check if plant exists in blockchain
+    const blockchain = getBlockchain();
+    const plant = blockchain.findPlant(plantId);
+
+    if (!plant) {
+      return res.status(404).json({ success: false, error: 'Plant not found' });
+    }
+
+    const agent = getPlantLineageAgent();
+
+    // Get cached lineage analysis from agent
+    let analysis = agent.getLineageAnalysis(plantId);
+
+    // If not cached, the agent hasn't scanned this plant yet
+    // Return basic info with a note that full analysis is pending
+    if (!analysis) {
+      return res.status(200).json({
+        success: true,
+        plantId,
+        cached: false,
+        message: 'Lineage analysis pending. Agent will analyze on next scan cycle.',
+        plant: {
+          id: plant.id,
+          species: plant.species,
+          generation: plant.generation,
+          status: plant.status,
+          parentPlantId: plant.parentPlantId,
+          childPlants: plant.childPlants || [],
+        },
+      });
+    }
+
+    res.status(200).json({
+      success: true,
+      plantId,
+      cached: true,
+      analysis: {
+        generation: analysis.generation,
+        ancestors: analysis.ancestors,
+        descendants: analysis.descendants,
+        totalLineageSize: analysis.totalLineageSize,
+        propagationChain: analysis.propagationChain,
+        geographicSpread: analysis.geographicSpread,
+        oldestAncestorDate: analysis.oldestAncestorDate,
+        healthScore: analysis.healthScore,
+      },
+      plant: {
+        id: plant.id,
+        species: plant.species,
+        generation: plant.generation,
+        status: plant.status,
+        propagationType: plant.propagationType,
+        location: plant.location,
+        dateAcquired: plant.dateAcquired,
+      },
+    });
+  } catch (error: any) {
+    console.error('Error getting lineage analysis:', error);
+    res.status(500).json({ success: false, error: error.message || 'Internal server error' });
+  }
+}
diff --git a/pages/api/agents/lineage/anomalies.ts b/pages/api/agents/lineage/anomalies.ts
new file mode 100644
index 0000000..8f1ef75
--- /dev/null
+++ b/pages/api/agents/lineage/anomalies.ts
@@ -0,0 +1,79 @@
+/**
+ * API Route: Get lineage anomalies detected by PlantLineageAgent
+ * GET /api/agents/lineage/anomalies
+ */
+
+import type { NextApiRequest, NextApiResponse } from 'next';
+import { getPlantLineageAgent } from '../../../../lib/agents';
+
+export default async function handler(
+  req: NextApiRequest,
+  res: NextApiResponse
+) {
+  if (req.method !== 'GET') {
+    return res.status(405).json({ success: false, error: 'Method not allowed' });
+  }
+
+  try {
+    const { severity, type, limit } = req.query;
+    const agent = getPlantLineageAgent();
+
+    let anomalies = agent.getAnomalies();
+
+    // Filter by severity if specified
+    if (severity && typeof severity === 'string') {
+      const validSeverities = ['low', 'medium', 'high'];
+      if (!validSeverities.includes(severity)) {
+        return res.status(400).json({
+          success: false,
+          error: `Invalid severity. Must be one of: ${validSeverities.join(', ')}`
+        });
+      }
+      anomalies = anomalies.filter(a => a.severity === severity);
+    }
+
+    // Filter by type if specified
+    if (type && typeof type === 'string') {
+      const validTypes = ['orphan', 'circular', 'invalid_generation', 'missing_parent', 'suspicious_location'];
+      if (!validTypes.includes(type)) {
+        return res.status(400).json({
+          success: false,
+          error: `Invalid type. Must be one of: ${validTypes.join(', ')}`
+        });
+      }
+      anomalies = anomalies.filter(a => a.type === type);
+    }
+
+    // Apply limit if specified
+    const maxResults = limit ? Math.min(parseInt(limit as string, 10), 100) : 50;
+    anomalies = anomalies.slice(0, maxResults);
+
+    // Group by type for summary
+    const byType: Record<string, number> = {};
+    const bySeverity: Record<string, number> = {};
+    const allAnomalies = agent.getAnomalies();
+
+    for (const anomaly of allAnomalies) {
+      byType[anomaly.type] = (byType[anomaly.type] || 0) + 1;
+      bySeverity[anomaly.severity] = (bySeverity[anomaly.severity] || 0) + 1;
+    }
+
+    res.status(200).json({
+      success: true,
+      summary: {
+        total: allAnomalies.length,
+        byType,
+        bySeverity,
+      },
+      filters: {
+        severity: severity || null,
+        type: type || null,
+        limit: maxResults,
+      },
+      anomalies,
+    });
+  } catch (error: any) {
+    console.error('Error getting lineage anomalies:', error);
+    res.status(500).json({ success: false, error: error.message || 'Internal server error' });
+  }
+}
diff --git a/pages/api/agents/lineage/index.ts b/pages/api/agents/lineage/index.ts
new file mode 100644
index 0000000..b927603
--- /dev/null
+++ b/pages/api/agents/lineage/index.ts
@@ -0,0 +1,92 @@
+/**
+ * API Route: PlantLineageAgent Status and Network Stats
+ * GET /api/agents/lineage - Get agent status and network statistics
+ * POST /api/agents/lineage - Start/stop/restart the agent
+ */
+
+import type { NextApiRequest, NextApiResponse } from 'next';
+import { getPlantLineageAgent } from '../../../../lib/agents';
+
+export default async function handler(
+  req: NextApiRequest,
+  res: NextApiResponse
+) {
+  const agent = getPlantLineageAgent();
+
+  if (req.method === 'GET') {
+    try {
+      const metrics = agent.getMetrics();
+      const networkStats = agent.getNetworkStats();
+      const anomalies = agent.getAnomalies();
+
+      res.status(200).json({
+        success: true,
+        agent: {
+          id: agent.config.id,
+          name: agent.config.name,
+          description: agent.config.description,
+          status: agent.status,
+          priority: agent.config.priority,
+          intervalMs: agent.config.intervalMs,
+        },
+        metrics: {
+          tasksCompleted: metrics.tasksCompleted,
+          tasksFailed: metrics.tasksFailed,
+          averageExecutionMs: Math.round(metrics.averageExecutionMs),
+          lastRunAt: metrics.lastRunAt,
+          lastSuccessAt: metrics.lastSuccessAt,
+          uptime: metrics.uptime,
+        },
+        networkStats,
+        anomalySummary: {
+          total: anomalies.length,
+          bySeverity: {
+            high: anomalies.filter(a => a.severity === 'high').length,
+            medium: anomalies.filter(a => a.severity === 'medium').length,
+            low: anomalies.filter(a => a.severity === 'low').length,
+          },
+        },
+      });
+    } catch (error: any) {
+      console.error('Error getting PlantLineageAgent status:', error);
+      res.status(500).json({ success: false, error: error.message || 'Internal server error' });
+    }
+  } else if (req.method === 'POST') {
+    try {
+      const { action } = req.body;
+
+      if (!action || !['start', 'stop', 'pause', 'resume'].includes(action)) {
+        return res.status(400).json({
+          success: false,
+          error: 'Invalid action. Must be one of: start, stop, pause, resume'
+        });
+      }
+
+      switch (action) {
+        case 'start':
+          await agent.start();
+          break;
+        case 'stop':
+          await agent.stop();
+          break;
+        case 'pause':
+          agent.pause();
+          break;
+        case 'resume':
+          agent.resume();
+          break;
+      }
+
+      res.status(200).json({
+        success: true,
+        action,
+        newStatus: agent.status,
+      });
+    } catch (error: any) {
+      console.error('Error controlling PlantLineageAgent:', error);
+      res.status(500).json({ success: false, error: error.message || 'Internal server error' });
+    }
+  } else {
+    res.status(405).json({ success: false, error: 'Method not allowed' });
+  }
+}