diff --git a/src/api/routes.py b/src/api/routes.py
index cce2167..afda3ce 100644
--- a/src/api/routes.py
+++ b/src/api/routes.py
@@ -68,6 +68,13 @@ def _track_consumption(response):
     token_id = getattr(g, "token_id", None)
     if token_id is not None:
         tracking.enqueue_counter_update(token_id)
+        tracking.enqueue_matomo_event(
+            token_id=token_id,
+            path=request.path,
+            query_string=request.query_string.decode("utf-8", errors="replace"),
+            status_code=response.status_code,
+            user_agent=request.headers.get("User-Agent", ""),
+        )
     return response
 
 
diff --git a/src/api/tracking.py b/src/api/tracking.py
index 00d25c5..c952d6b 100644
--- a/src/api/tracking.py
+++ b/src/api/tracking.py
@@ -1,14 +1,16 @@
+import os
 import queue
 import threading
 from typing import Optional
 
+import httpx
+
 from src.api import tokens_db
 from src.utils import logger
 
 _STOP_SENTINEL = object()
 _queue: Optional[queue.Queue] = None
 _worker_thread: Optional[threading.Thread] = None
-_db_path: Optional[str] = None
 
 
 def _worker_loop(q: queue.Queue, db_path: str) -> None:
@@ -28,15 +30,55 @@ def _worker_loop(q: queue.Queue, db_path: str) -> None:
                         token_id,
                         exc_info=True,
                     )
+            elif kind == "matomo":
+                try:
+                    _post_matomo(**payload)
+                except Exception:  # noqa: BLE001
+                    logger.warning("tracking: échec envoi Matomo", exc_info=True)
         finally:
             q.task_done()
 
 
+def _post_matomo(url: str, params: dict) -> None:
+    """POST fire-and-forget vers la Tracking API Matomo. Mockable en test."""
+    httpx.post(url, data=params, timeout=5.0)
+
+
+def enqueue_matomo_event(
+    token_id: int,
+    path: str,
+    query_string: str,
+    status_code: int,
+    user_agent: str,
+) -> None:
+    if _queue is None:
+        return
+    if os.getenv("MATOMO_TRACKING_ENABLED", "false").lower() != "true":
+        return
+    url = os.getenv("MATOMO_URL")
+    site_id = os.getenv("MATOMO_SITE_ID")
+    if not url or not site_id:
+        return
+    full_url = f"https://decp.info{path}"
+    if query_string:
+        full_url += f"?{query_string}"
+    params = {
+        "idsite": site_id,
+        "rec": "1",
+        "url": full_url,
+        "action_name": f"API {path}",
+        "uid": f"token-{token_id}",
+        "dimension1": str(token_id),
+        "dimension2": str(status_code),
+        "ua": user_agent,
+    }
+    _queue.put(("matomo", {"url": url, "params": params}))
+
+
 def start_worker(db_path: str) -> None:
-    global _queue, _worker_thread, _db_path
+    global _queue, _worker_thread
     if _worker_thread is not None and _worker_thread.is_alive():
         return
-    _db_path = db_path
     _queue = queue.Queue()
     _worker_thread = threading.Thread(
         target=_worker_loop, args=(_queue, db_path), daemon=True
@@ -64,4 +106,13 @@ def flush(timeout: float = 2.0) -> None:
     """Attend que la queue soit drainée. Utile en test."""
     if _queue is None:
         return
-    _queue.join()
+    # Use a sentinel approach to properly honour the timeout
+    done_event = threading.Event()
+
+    def _wait():
+        _queue.join()
+        done_event.set()
+
+    t = threading.Thread(target=_wait, daemon=True)
+    t.start()
+    done_event.wait(timeout=timeout)
diff --git a/tests/api/test_tracking.py b/tests/api/test_tracking.py
index dd0a662..44d9f54 100644
--- a/tests/api/test_tracking.py
+++ b/tests/api/test_tracking.py
@@ -34,3 +34,46 @@ def test_after_request_hook_increments_counter_async(api_client, valid_token_hea
 
     rows = tokens_db.list_tokens(db_path)
     assert rows[0]["count_total"] == 1
+
+
+def test_matomo_disabled_skips_call(monkeypatch, api_client, valid_token_header):
+    monkeypatch.setenv("MATOMO_TRACKING_ENABLED", "false")
+    client, _ = api_client
+
+    from src.api import tracking
+
+    called = []
+    monkeypatch.setattr(
+        tracking,
+        "_post_matomo",
+        lambda **kw: called.append(kw),
+    )
+    client.get("/api/v1/health")
+    tracking.flush(timeout=2.0)
+    assert called == []
+
+
+def test_matomo_enabled_posts_event(monkeypatch, api_client, valid_token_header):
+    monkeypatch.setenv("MATOMO_TRACKING_ENABLED", "true")
+    monkeypatch.setenv("MATOMO_URL", "https://matomo.example/matomo.php")
+    monkeypatch.setenv("MATOMO_SITE_ID", "42")
+
+    from src.api import tracking
+
+    captured = []
+    monkeypatch.setattr(
+        tracking,
+        "_post_matomo",
+        lambda **kw: captured.append(kw),
+    )
+
+    client, _ = api_client
+    client.get("/api/v1/schema", headers=valid_token_header)
+    tracking.flush(timeout=2.0)
+
+    assert len(captured) == 1
+    call = captured[0]
+    assert call["params"]["idsite"] == "42"
+    assert call["params"]["rec"] == "1"
+    assert "token-" in call["params"]["uid"]
+    assert call["params"]["dimension2"] == "200"