diff --git a/packagedb/purl-superseded-01.py b/packagedb/purl-superseded-01.py
new file mode 100644
index 00000000..e0f76e68
--- /dev/null
+++ b/packagedb/purl-superseded-01.py
@@ -0,0 +1,126 @@
+# 2023-12-21 Thursday 16:18:34.  This was purl.py, which is now a new file that will use arguments for the input .txt and the output .json.
+import json
+from datetime import datetime
+
+import click
+import requests
+
+now = datetime.today().strftime("%Y-%m-%d %a. %#I:%M:%S %p")
+
+
+@click.command()
+@click.option(
+    "-pv",
+    "--purl_validate",
+    multiple=True,
+    help="Check whether the syntax of the PURL is valid.  Handles multiple inputs: each PURL must be preceded by the -/-- option name.",
+)
+@click.option(
+    "-pv_txt",
+    "--purl_validate_txt",
+    type=click.Path(exists=True, readable=True, path_type=str, dir_okay=False),
+    required=False,
+    help="Check whether the syntax of each of the listed PURLs is valid.  Handles multiple inputs contained in a .txt file: each PURL must be on a separate line.",
+)
+@click.option(
+    "-dt",
+    "--datetime",
+    help="Get the current datetime.",
+)
+def cli(purl_validate, purl_validate_txt, datetime):
+    # print(f"\nHello!\n")
+
+    if purl_validate:
+        print(f"\npurl_validate = {purl_validate}")
+        api_query = "https://public.purldb.io/api/validate/"
+
+        # Create a list to hold the dictionaries that we'll then output in a JSON file
+        json_list = []
+
+        for purl in purl_validate:
+            print(f"\npurl = {purl}")
+
+            request_body = {
+                "purl": purl,
+                "check_existence": True,
+            }
+
+            response = requests.get(
+                api_query,
+                params=request_body,
+            )
+
+            # abc is a dictionary
+            abc = json.loads(response.text)
+            print(f"\ntype(abc) = {type(abc)}")
+
+            # print(json.dumps(abc, indent=4, sort_keys=False))
+            print(f"\n{json.dumps(abc, indent=4, sort_keys=False)}")
+
+            # 2023-12-21 Thursday 09:09:35.  Create JSON file.
+            with open(
+                "/mnt/c/nexb/purldb-testing/2023-12-21-testing/json-output/2023-12-21-purl_validate-output-01.json",
+                "w",
+            ) as f_out:
+                json.dump(abc, f_out, indent=4)
+
+            json_list.append(abc)
+
+        # Create another JSON file to hold the list of dictionaries
+        with open(
+            "/mnt/c/nexb/purldb-testing/2023-12-21-testing/json-output/2023-12-21-purl_validate-output-list-01.json",
+            "w",
+        ) as f_out:
+            json.dump(json_list, f_out, indent=4)
+
+    if purl_validate_txt:
+        print(f"\npurl_validate_txt = {purl_validate_txt}")
+
+        with open(purl_validate_txt) as f:
+            purls = f.read().splitlines()
+
+        print(f"\npurls = {purls}")
+
+        api_query = "https://public.purldb.io/api/validate/"
+
+        # Create a list to hold the dictionaries that we'll then output in a JSON file
+        json_list = []
+
+        for purl in purls:
+            print(f"\npurl = {purl}")
+
+            request_body = {
+                "purl": purl,
+                "check_existence": True,
+            }
+
+            response = requests.get(
+                api_query,
+                params=request_body,
+            )
+
+            # abc is a dictionary
+            abc = json.loads(response.text)
+            print(f"\ntype(abc) = {type(abc)}")
+
+            # print(json.dumps(abc, indent=4, sort_keys=False))
+            print(f"\n{json.dumps(abc, indent=4, sort_keys=False)}")
+
+            # 2023-12-21 Thursday 09:09:35.  Create JSON file.
+            with open(
+                "/mnt/c/nexb/purldb-testing/2023-12-21-testing/json-output/2023-12-21-purl_validate_txt-output-01.json",
+                "w",
+            ) as f_out:
+                json.dump(abc, f_out, indent=4)
+
+            json_list.append(abc)
+
+        # Create another JSON file to hold the list of dictionaries
+        with open(
+            "/mnt/c/nexb/purldb-testing/2023-12-21-testing/json-output/2023-12-21-purl_validate_txt-output-list-01.json",
+            "w",
+        ) as f_out:
+            json.dump(json_list, f_out, indent=4)
+
+    if datetime:
+        print(f"\nCurrent time: {now}\n")
diff --git a/packagedb/purl.py b/packagedb/purl.py
new file mode 100644
index 00000000..9f4690e9
--- /dev/null
+++ b/packagedb/purl.py
@@ -0,0 +1,142 @@
+import json
+from datetime import datetime
+
+import click
+import requests
+
+now = datetime.today().strftime("%Y-%m-%d %a. %#I:%M:%S %p")
+
+
+@click.command()
+@click.option(
+    "-pv",
+    "--purl_validate",
+    metavar="purl_validate",
+    multiple=True,
+    help="Check whether the syntax of the PURL is valid.  Handles multiple inputs: each PURL must be preceded by the -/-- option name.",
+)
+@click.option(
+    "-pv_txt",
+    "--purl_validate_txt",
+    metavar="purl_validate_txt",
+    type=click.Path(exists=True, readable=True, path_type=str, dir_okay=False),
+    required=False,
+    help="Check whether the syntax of each of the listed PURLs is valid.  Handles multiple inputs contained in a .txt file: each PURL must be on a separate line.",
+)
+# ZAP: 2023-12-21 Thursday 16:23:32.  When are these input and output arguments required?  Tied to a flag?
+@click.argument(
+    "input",
+    required=True,
+    metavar="INPUT",
+    type=click.Path(
+        exists=True, file_okay=True, dir_okay=True, readable=True, resolve_path=True
+    ),
+)
+@click.argument(
+    "output",
+    required=True,
+    metavar="OUTPUT",
+    type=click.Path(exists=False, dir_okay=False, writable=True, resolve_path=True),
+)
+@click.option(
+    "-dt",
+    "--datetime",
+    help="Get the current datetime.",
+)
+def cli(purl_validate, purl_validate_txt, datetime):
+    # print(f"\nHello!\n")
+
+    if purl_validate:
+        print(f"\npurl_validate = {purl_validate}")
+        api_query = "https://public.purldb.io/api/validate/"
+
+        # Create a list to hold the dictionaries that we'll then output in a JSON file
+        json_list = []
+
+        for purl in purl_validate:
+            print(f"\npurl = {purl}")
+
+            request_body = {
+                "purl": purl,
+                "check_existence": True,
+            }
+
+            response = requests.get(
+                api_query,
+                params=request_body,
+            )
+
+            # abc is a dictionary
+            abc = json.loads(response.text)
+            print(f"\ntype(abc) = {type(abc)}")
+
+            # print(json.dumps(abc, indent=4, sort_keys=False))
+            print(f"\n{json.dumps(abc, indent=4, sort_keys=False)}")
+
+            # 2023-12-21 Thursday 09:09:35.  Create JSON file.
+            with open(
+                "/mnt/c/nexb/purldb-testing/2023-12-21-testing/json-output/2023-12-21-purl_validate-output-01.json",
+                "w",
+            ) as f_out:
+                json.dump(abc, f_out, indent=4)
+
+            json_list.append(abc)
+
+        # Create another JSON file to hold the list of dictionaries
+        with open(
+            "/mnt/c/nexb/purldb-testing/2023-12-21-testing/json-output/2023-12-21-purl_validate-output-list-01.json",
+            "w",
+        ) as f_out:
+            json.dump(json_list, f_out, indent=4)
+
+    if purl_validate_txt:
+        print(f"\npurl_validate_txt = {purl_validate_txt}")
+
+        with open(purl_validate_txt) as f:
+            purls = f.read().splitlines()
+
+        print(f"\npurls = {purls}")
+
+        api_query = "https://public.purldb.io/api/validate/"
+
+        # Create a list to hold the dictionaries that we'll then output in a JSON file
+        json_list = []
+
+        for purl in purls:
+            print(f"\npurl = {purl}")
+
+            request_body = {
+                "purl": purl,
+                "check_existence": True,
+            }
+
+            response = requests.get(
+                api_query,
+                params=request_body,
+            )
+
+            # abc is a dictionary
+            abc = json.loads(response.text)
+            print(f"\ntype(abc) = {type(abc)}")
+
+            # print(json.dumps(abc, indent=4, sort_keys=False))
+            print(f"\n{json.dumps(abc, indent=4, sort_keys=False)}")
+
+            # 2023-12-21 Thursday 09:09:35.  Create JSON file.
+            with open(
+                "/mnt/c/nexb/purldb-testing/2023-12-21-testing/json-output/2023-12-21-purl_validate_txt-output-01.json",
+                "w",
+            ) as f_out:
+                json.dump(abc, f_out, indent=4)
+
+            json_list.append(abc)
+
+        # Create another JSON file to hold the list of dictionaries
+        with open(
+            "/mnt/c/nexb/purldb-testing/2023-12-21-testing/json-output/2023-12-21-purl_validate_txt-output-list-01.json",
+            "w",
+        ) as f_out:
+            json.dump(json_list, f_out, indent=4)
+
+    if datetime:
+        print(f"\nCurrent time: {now}\n")
diff --git a/packagedb/purl_cli-superseded.py b/packagedb/purl_cli-superseded.py
new file mode 100644
index 00000000..b4366844
--- /dev/null
+++ b/packagedb/purl_cli-superseded.py
@@ -0,0 +1,186 @@
+from datetime import datetime
+
+import click
+import requests
+
+now = datetime.today().strftime("%Y-%m-%d %a. %#I:%M:%S %p")
+
+
+@click.command()
+# @click.argument("location", type=click.Path(exists=True, readable=True))
+# @click.argument("destination", type=click.Path(exists=False), required=True)
+# @click.argument("api_key", envvar="VCIO_API_KEY")
+# def cli(
+#     location,
+#     destination,
+#     api_key,
+# ):
+@click.option(
+    "-pv",
+    "--purl_validate",
+    multiple=True,
+    # is_flag=True,
+    # show_default=True,
+    # default=False,
+    help="Check whether the syntax of the PURL is valid.  Handles multiple inputs: each PURL must be preceded by the -/-- option name.",
+)
+@click.option(
+    "-pv_txt",
+    "--purl_validate_txt",
+    type=click.Path(exists=True, readable=True, path_type=str, dir_okay=False),
+    # multiple=True,
+    # is_flag=True,
+    # show_default=True,
+    # default=False,
+    required=False,
+    help="Check whether the syntax of each of the listed PURLs is valid.  Handles multiple inputs contained in a .txt file: each PURL must be on a separate line.",
+)
+@click.option(
+    "-dt",
+    "--datetime",
+    # is_flag=True,
+    # show_default=True,
+    # default=False,
+    help="Get the current datetime.",
+)
+# This is from the fetch_thirdparty.py example -- let's figure out how it works.
+# @click.option(
+#     "-r",
+#     "--requirements",
+#     "requirements_files",
+#     type=click.Path(exists=True, readable=True, path_type=str, dir_okay=False),
+#     metavar="REQUIREMENT-FILE",
+#     # multiple=True,
+#     required=False,
+#     help="Path to pip requirements file(s) listing thirdparty packages.",
+# )
+# def cli(purl_validate, purl_validate_txt, datetime, requirements_files):
+def cli(purl_validate, purl_validate_txt, datetime):
+    print(f"\nHello!\n")
+
+    if purl_validate:
+        print(f"purl_validate = {purl_validate}\n")
+        # =====================================================
+
+        # ZAP: 2023-12-18 Monday 09:00:24.  Per Slack comments frm Keshav, these work atm:
+
+        # 1.  Check only the PURL syntax, and not whether the PURL exists in the relevant upstream repo:
+
+        # check_existence is currently limited to
+
+        # api_query = "https://public.purldb.io/api/validate/"
+
+        # request_body = {
+        #     "purl": "pkg:nginx/nginx@0.8.9?os=windows",
+        # }
+
+        # response = requests.get(
+        #     api_query,
+        #     params=request_body,
+        # )
+
+        # 2.  Check (a) the PURL syntax and (b) whether the PURL exists in the relevant upstream repo:
+
+        # `check_existence` is currently limited to `cargo`, `composer`, `deb`, `gem`, `golang`, `hex`, `maven`, `npm`, `nuget` and `pypi` ecosystems.
+
+        api_query = "https://public.purldb.io/api/validate/"
+
+        for purl in purl_validate:
+            print(f"purl = {purl}")
+            try:
+                request_body = {
+                    # "purl": "pkg:maven/com.fasterxml.jackson.core/jackson-databind@2.14.0-rc1",
+                    "purl": purl,
+                    "check_existence": True,
+                }
+
+                response = requests.get(
+                    api_query,
+                    params=request_body,
+                )
+
+                # =====================================================
+
+                # print("response.content = {}".format(response.content))
+                # print("response.json = {}".format(response.json))
+
+                # print("response.json() = {}".format(response.json()))
+                # print("len(response.json()) = {}".format(len(response.json())))
+
+                # if response.json().get("results"):
+                #     print(
+                #         "len(response.json().get('results')) = {}".format(
+                #             len(response.json().get("results"))
+                #         )
+                #     )
+                # else:
+                #     print("No 'results'")
+
+                import json
+
+                abc = json.loads(response.text)
+                # print("abc = {}".format(abc))
+
+                print(json.dumps(abc, indent=4, sort_keys=False))
+
+            # ZAP: 2023-12-20 Wednesday 08:55:23.  Limit this to type error for unhandled PURL types.
+            except:
+                print(f"Drat!  It looks like we're not yet able to handle '{purl}'.\n")
+
+    # if requirements_files:
+    if purl_validate_txt:
+        # print(f"Hurrah!")
+
+        print(f"purl_validate_txt = {purl_validate_txt}")
+
+        with open(purl_validate_txt) as f:
+            purls = f.read().splitlines()
+
+        print(f"\npurls = {purls}")
+
+        api_query = "https://public.purldb.io/api/validate/"
+
+        for purl in purls:
+            print(f"\npurl = {purl}")
+            try:
+                request_body = {
+                    # "purl": "pkg:maven/com.fasterxml.jackson.core/jackson-databind@2.14.0-rc1",
+                    # "purl": purl,
+                    "purl": purl,
+                    "check_existence": True,
+                }
+
+                response = requests.get(
+                    api_query,
+                    params=request_body,
+                )
+
+                # =====================================================
+
+                # print("response.content = {}".format(response.content))
+                # print("response.json = {}".format(response.json))
+
+                # print("response.json() = {}".format(response.json()))
+                # print("len(response.json()) = {}".format(len(response.json())))
+
+                # if response.json().get("results"):
+                #     print(
+                #         "len(response.json().get('results')) = {}".format(
+                #             len(response.json().get("results"))
+                #         )
+                #     )
+                # else:
+                #     print("No 'results'")
+
+                import json
+
+                abc = json.loads(response.text)
+                # print("abc = {}".format(abc))
+
+                print(json.dumps(abc, indent=4, sort_keys=False))
+
+            except:
+                print(f"Drat!  It looks like we're not yet able to handle '{purl}'.\n")
+
+    if datetime:
+        print(f"\nCurrent time: {now}\n")
diff --git a/setup.cfg b/setup.cfg
index 2e989d7a..085cde79 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -81,3 +81,4 @@ docs =
 [options.entry_points]
 console_scripts =
     purldb = purldb:command_line
+    purl = packagedb.purl:cli