diff --git a/src/services/extractionLogger.js b/src/services/extractionLogger.js
new file mode 100644
index 0000000..daa9114
--- /dev/null
+++ b/src/services/extractionLogger.js
@@ -0,0 +1,74 @@
+import fs from 'fs/promises';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const LOG_DIR = path.join(__dirname, '../../logs');
+const LOG_FILE = path.join(LOG_DIR, 'extraction.log');
+
+/**
+ * Ensures the log directory exists
+ */
+async function ensureLogDirectory() {
+  try {
+    await fs.mkdir(LOG_DIR, { recursive: true });
+  } catch (error) {
+    console.error('Failed to create log directory:', error);
+    throw error;
+  }
+}
+
+/**
+ * Formats a timestamp for logging
+ */
+function formatTimestamp() {
+  return new Date().toISOString();
+}
+
+/**
+ * Logs an extraction event with input and output
+ * @param {Object} input - The input data (search result from Exa)
+ * @param {string} output - The extracted text content
+ */
+export async function logExtraction(input, output) {
+  try {
+    await ensureLogDirectory();
+
+    const timestamp = formatTimestamp();
+    const logEntry = {
+      timestamp,
+      input: {
+        resultCount: input?.results?.length || 0,
+        results: input?.results?.map((r) => ({
+          title: r.title,
+          url: r.url,
+          textPreview: r.text?.substring(0, 200) + (r.text?.length > 200 ? '...' : ''),
+          summaryPreview: r.summary?.substring(0, 200) + (r.summary?.length > 200 ? '...' : ''),
+          highlightsCount: r.highlights?.length || 0,
+          publishedDate: r.publishedDate,
+          author: r.author,
+        })),
+      },
+      output: {
+        length: output.length,
+        preview: output.substring(0, 500) + (output.length > 500 ? '...' : ''),
+      },
+    };
+
+    const logLine = `${timestamp} | Input: ${JSON.stringify(logEntry.input)} | Output: [${logEntry.output.length} chars] ${logEntry.output.preview}\n`;
+
+    await fs.appendFile(LOG_FILE, logLine, 'utf8');
+  } catch (error) {
+    console.error('Failed to log extraction:', error);
+    // Don't throw - logging should not break the main functionality
+  }
+}
+
+/**
+ * Gets the path to the extraction log file
+ */
+export function getLogFilePath() {
+  return LOG_FILE;
+}
\ No newline at end of file
diff --git a/src/services/openRouterLogger.js b/src/services/openRouterLogger.js
new file mode 100644
index 0000000..3503235
--- /dev/null
+++ b/src/services/openRouterLogger.js
@@ -0,0 +1,102 @@
+import fs from 'fs/promises';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const LOG_DIR = path.join(__dirname, '../../logs');
+const LOG_FILE = path.join(LOG_DIR, 'openrouter.log');
+
+/**
+ * Ensures the log directory exists
+ */
+async function ensureLogDirectory() {
+  try {
+    await fs.mkdir(LOG_DIR, { recursive: true });
+  } catch (error) {
+    console.error('Failed to create log directory:', error);
+    throw error;
+  }
+}
+
+/**
+ * Formats a timestamp for logging
+ */
+function formatTimestamp() {
+  return new Date().toISOString();
+}
+
+/**
+ * Safely truncates a string
+ */
+function truncate(str, maxLength = 1000) {
+  if (!str) return '';
+  return str.length > maxLength ? str.substring(0, maxLength) + '...' : str;
+}
+
+/**
+ * Logs an OpenRouter API call with params and response
+ * @param {string} operation - The operation name (e.g., 'summarizeSources', 'summarizeFinalAnswer')
+ * @param {Object} params - The request parameters sent to OpenRouter
+ * @param {Object} response - The response from OpenRouter
+ * @param {Error} [error] - Optional error if the call failed
+ */
+export async function logOpenRouterCall(operation, params, response, error = null) {
+  try {
+    await ensureLogDirectory();
+
+    const timestamp = formatTimestamp();
+    
+    // Sanitize and truncate params for logging
+    const sanitizedParams = {
+      model: params.model,
+      messages: params.messages?.map((msg) => ({
+        role: msg.role,
+        contentPreview: truncate(msg.content, 500),
+      })),
+      reasoning: params.reasoning,
+      responseFormat: params.responseFormat?.jsonSchema?.name,
+      stream: params.stream,
+    };
+
+    // Sanitize response
+    const sanitizedResponse = response
+      ? {
+          choices: response.choices?.map((choice) => ({
+            messagePreview: truncate(choice.message?.content, 500),
+            finishReason: choice.finish_reason,
+          })),
+          model: response.model,
+          usage: response.usage,
+        }
+      : null;
+
+    const logEntry = {
+      timestamp,
+      operation,
+      params: sanitizedParams,
+      response: sanitizedResponse,
+      error: error
+        ? {
+            name: error.name,
+            message: error.message,
+          }
+        : null,
+    };
+
+    const logLine = `${timestamp} | ${operation} | Params: ${JSON.stringify(logEntry.params)} | Response: ${JSON.stringify(logEntry.response)}${error ? ` | Error: ${error.message}` : ''}\n`;
+
+    await fs.appendFile(LOG_FILE, logLine, 'utf8');
+  } catch (logError) {
+    console.error('Failed to log OpenRouter call:', logError);
+    // Don't throw - logging should not break the main functionality
+  }
+}
+
+/**
+ * Gets the path to the OpenRouter log file
+ */
+export function getOpenRouterLogFilePath() {
+  return LOG_FILE;
+}
\ No newline at end of file
diff --git a/src/services/openRouterService.js b/src/services/openRouterService.js
index be2f8cb..bbbf8ec 100644
--- a/src/services/openRouterService.js
+++ b/src/services/openRouterService.js
@@ -1,3 +1,5 @@
+import { logOpenRouterCall } from './openRouterLogger.js';
+
 function parseResponse(response) {
   return JSON.parse(response.choices[0].message.content);
 }
@@ -46,6 +48,7 @@ export async function summarizeSources({ openrouter, text, question }) {
   };
 
   const response = await openrouter.chat.send({ chatRequest: params });
+  await logOpenRouterCall('summarizeSources', params, response);
   return parseResponse(response);
 }
 
@@ -86,5 +89,6 @@ export async function summarizeFinalAnswer({ openrouter, text, question }) {
   };
 
   const response = await openrouter.chat.send({ chatRequest: params });
+  await logOpenRouterCall('summarizeFinalAnswer', params, response);
   return parseResponse(response);
 }
diff --git a/src/services/searchService.js b/src/services/searchService.js
index e2692cb..05b1c29 100644
--- a/src/services/searchService.js
+++ b/src/services/searchService.js
@@ -1,4 +1,5 @@
 import { extractContent } from './extractContent.js';
+import { logExtraction } from './extractionLogger.js';
 import { summarizeFinalAnswer, summarizeSources } from './openRouterService.js';
 import { formatSummarySources } from './searchFormatter.js';
 
@@ -84,6 +85,9 @@ export function createSearchService({ exa, openrouter, broadcast }) {
 
       const extractedContent = extractContent(result);
 
+      // Log the extraction
+      await logExtraction(result, extractedContent);
+
       if (!extractedContent.trim()) {
         throw new SearchServiceError('No content extracted from results');
       }