diff --git a/.github/workflows/get_context.yml b/.github/workflows/get_context.yml
index 13b0122..3b3bbd7 100644
--- a/.github/workflows/get_context.yml
+++ b/.github/workflows/get_context.yml
@@ -32,7 +32,7 @@ jobs:
           path: artifacts
       - name: Get Directory structure
         run: ls -lR
-      - run: python find_posts.py --lock-hours=0 --access-token=${{ secrets.ACCESS_TOKEN }} --server=${{ vars.MASTODON_SERVER }} --reply-interval-in-hours=${{ vars.REPLY_INTERVAL_IN_HOURS || 0 }} --home-timeline-length=${{ vars.HOME_TIMELINE_LENGTH || 0 }} --max-followings=${{ vars.MAX_FOLLOWINGS || 0 }} --user=${{ vars.USER }} --max-followers=${{ vars.MAX_FOLLOWERS || 0 }}  --http-timeout=${{ vars.HTTP_TIMEOUT || 5 }} --max-follow-requests=${{ vars.MAX_FOLLOW_REQUESTS || 0 }} --finished-callback=${{ vars.FINISHED_CALLBACK }} --started-callback=${{ vars.STARTED_CALLBACK }}
+      - run: python find_posts.py --lock-hours=0 --access-token=${{ secrets.ACCESS_TOKEN }} --server=${{ vars.MASTODON_SERVER }} --reply-interval-in-hours=${{ vars.REPLY_INTERVAL_IN_HOURS || 0 }} --home-timeline-length=${{ vars.HOME_TIMELINE_LENGTH || 0 }} --max-followings=${{ vars.MAX_FOLLOWINGS || 0 }} --user=${{ vars.USER }} --max-followers=${{ vars.MAX_FOLLOWERS || 0 }}  --http-timeout=${{ vars.HTTP_TIMEOUT || 5 }} --max-follow-requests=${{ vars.MAX_FOLLOW_REQUESTS || 0 }} --on-fail=${{ vars.ON_FAIL }} --on-start=${{ vars.ON_START }} --on-done=${{ vars.ON_DONE }}
       - name: Upload artifacts
         uses: actions/upload-artifact@v3
         with:
diff --git a/README.md b/README.md
index b35e263..0c3701e 100644
--- a/README.md
+++ b/README.md
@@ -89,7 +89,9 @@ Please see below for a list of configuration options.
 | `MAX_FOLLOW_REQUESTS` | `--max-follow-requests` | No | Provide to backfill profiles for the API key owner's most recent pending follow requests. Determines how many of your last follow requests you want to backfill. (An integer number, e.g. `80`.). Requires an access token with `read:follows` scope.
 | `HTTP_TIMEOUT` | `--http-timeout` | No | The timeout for any HTTP requests to the Mastodon API in seconds. Defaults to `5`.
 | -- | `--lock-hours` | No | Determines after how many hours a lock file should be discarded. Not relevant when running the script as GitHub Action, as concurrency is prevented using a different mechanism.
-| `FINISHED_CALLBACK` | `--finished-callback` | No | Optionally provide a callback URL that will be called when processing is finished. This can be used for 'dead man switch' monitoring of cron jobs, for example via healthchecks.io.
+| `ON_START` | `--on-start` | No | Optionally provide a callback URL that will be pinged when processing is starting. A query parameter `rid={uuid}` will automatically be appended to uniquely identify each execution. This can be used to monitor your script using a service such as healthchecks.io.
+| `ON_DONE` | `--on-done` | No | Optionally provide a callback URL that will be called when processing is finished.  A query parameter `rid={uuid}` will automatically be appended to uniquely identify each execution. This can be used to monitor your script using a service such as healthchecks.io.
+| `ON_FAIL` | `--on-fail` | No | Optionally provide a callback URL that will be called when processing has failed.  A query parameter `rid={uuid}` will automatically be appended to uniquely identify each execution. This can be used to monitor your script using a service such as healthchecks.io.
 
 #### Required Access Token Scopes
 
diff --git a/find_posts.py b/find_posts.py
index 1960a25..03c96a0 100644
--- a/find_posts.py
+++ b/find_posts.py
@@ -24,8 +24,9 @@ argparser.add_argument('--max-followers', required = False, type=int, default=0,
 argparser.add_argument('--max-follow-requests', required = False, type=int, default=0, help="Backfill posts of the API key owners pending follow requests. We'll backfill at most this many requester's posts")
 argparser.add_argument('--http-timeout', required = False, type=int, default=5, help="The timeout for any HTTP requests to your own, or other instances.")
 argparser.add_argument('--lock-hours', required = False, type=int, default=24, help="The lock timeout in hours.")
-argparser.add_argument('--finished-callback', required = False, default=None, help="Provide a callback url that will be pinged when processing is complete. You can use this for 'dead man switch' monitoring of your task")
-argparser.add_argument('--started-callback', required = False, default=None, help="Provide a callback url that will be pinged when processing is starting. You can use this for 'dead man switch' monitoring of your task")
+argparser.add_argument('--on-done', required = False, default=None, help="Provide a url that will be pinged when processing has completed. You can use this for 'dead man switch' monitoring of your task")
+argparser.add_argument('--on-start', required = False, default=None, help="Provide a url that will be pinged when processing is starting. You can use this for 'dead man switch' monitoring of your task")
+argparser.add_argument('--on-fail', required = False, default=None, help="Provide a url that will be pinged when processing has failed. You can use this for 'dead man switch' monitoring of your task")
 
 def pull_context(
     server,
@@ -692,6 +693,14 @@ if __name__ == "__main__":
 
     arguments = argparser.parse_args()
 
+    runId = uuid.uuid4()
+
+    if(arguments.on_start != None):
+        try:
+            get(f"{arguments.on_start}?rid={runId}")
+        except Exception as ex:
+            log(f"Error getting callback url: {ex}")
+
     LOCK_FILE = 'artifacts/lock.lock'
 
     if( os.path.exists(LOCK_FILE)):
@@ -706,20 +715,22 @@ if __name__ == "__main__":
                 log(f"Lock file has expired. Removed lock file.")
             else:
                 log(f"Lock file age is {datetime.now() - lock_time} - below --lock-hours={arguments.lock_hours} provided.")
+                if(arguments.on_fail != None):
+                    try:
+                        get(f"{arguments.on_fail}?rid={runId}")
+                    except Exception as ex:
+                        log(f"Error getting callback url: {ex}")
                 sys.exit(1)
 
         except Exception:
             log(f"Cannot read logfile age - aborting.")
+            if(arguments.on_fail != None):
+                try:
+                    get(f"{arguments.on_fail}?rid={runId}")
+                except Exception as ex:
+                    log(f"Error getting callback url: {ex}")
             sys.exit(1)
 
-    runId = uuid.uuid4()
-
-    if(arguments.started_callback != None):
-        try:
-            get(f"{arguments.started_callback}?rid={runId}")
-        except Exception as ex:
-            log(f"Error getting callback url: {ex}")
-
     with open(LOCK_FILE, "w", encoding="utf-8") as f:
         f.write(f"{datetime.now()}")
 
@@ -770,9 +781,9 @@ if __name__ == "__main__":
 
         os.remove(LOCK_FILE)
 
-        if(arguments.finished_callback != None):
+        if(arguments.on_done != None):
             try:
-                get(f"{arguments.finished_callback}?rid={runId}")
+                get(f"{arguments.on_done}?rid={runId}")
             except Exception as ex:
                 log(f"Error getting callback url: {ex}")
 
@@ -781,4 +792,9 @@ if __name__ == "__main__":
     except Exception as ex:
         os.remove(LOCK_FILE)
         log(f"Job failed after {datetime.now() - start}.")
+        if(arguments.on_fail != None):
+            try:
+                get(f"{arguments.on_fail}?rid={runId}")
+            except Exception as ex:
+                log(f"Error getting callback url: {ex}")
         raise