diff --git a/tools/bulk_search/README.md b/tools/bulk_search/README.md
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+# Bulk Search Tool for Censys
+
+## Overview
+This tool adds bulk-search capability for processing multiple IPs/domains
+from a file and exporting results to JSON. Includes `--mock` mode for
+development or free-tier accounts without search quota.
+
+## Usage
+python3 bulk_search.py -f sample_ips.txt -o results.json --mock
+
+## Example Output
+See example_output.json
+Save and exit:
+
+Ctrl + O, Enter, Ctrl + X
diff --git a/tools/bulk_search/bulk_search.py b/tools/bulk_search/bulk_search.py
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+import sys
+import os
+import json
+import time
+import argparse
+
+# Censys client import (only used when not mock)
+try:
+    from censys.search import CensysHosts
+except ImportError:
+    CensysHosts = None
+
+
+def bulk_search(input_file, output_file, mock=False):
+    results = []
+
+    if not mock and CensysHosts is None:
+        print("[!] Censys library missing or not installed properly.")
+        mock = True
+
+    if not mock:
+        api_id = os.getenv("CENSYS_API_ID")
+        api_secret = os.getenv("CENSYS_API_SECRET")
+        if not api_id or not api_secret:
+            print("[!] Missing API credentials. Switching to mock mode.")
+            mock = True
+
+        if not mock:
+            h = CensysHosts(api_id=api_id, api_secret=api_secret)
+
+    print("\n=== Bulk Search Started ===")
+    with open(input_file, "r") as targets:
+        for ip in targets:
+            ip = ip.strip()
+            if not ip:
+                continue
+
+            print(f"[+] Searching: {ip}")
+            try:
+                if mock:
+                    # Generate mock result
+                    result = {
+                        "ip": ip,
+                        "status": "mock-result-success",
+                        "open_ports": [80, 443],
+                        "tech": ["nginx", "ssl"]
+                    }
+                else:
+                    # Actual search request (will fail on free tier)
+                    result = list(h.search(f"ip:{ip}", per_page=1))
+
+                results.append(result)
+
+            except Exception as e:
+                print(f"[!] Error: {e}")
+                time.sleep(1)
+                continue
+
+    with open(output_file, "w") as out:
+        json.dump(results, out, indent=4)
+
+    print(f"\n[✔] Results written to {output_file}")
+    print("=== Done ===\n")
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="Bulk Censys Search Tool")
+
+    parser.add_argument("-f", "--file", required=True, help="Input file containing IP list")
+    parser.add_argument("-o", "--output", required=True, help="Output JSON file")
+    parser.add_argument("--mock", action="store_true", help="Enable mock mode (no API calls)")
+
+    args = parser.parse_args()
+
+    bulk_search(args.file, args.output, args.mock)