diff --git a/README.md b/README.md
index bad79f9..c1867d4 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ Every integration that calls the REST API directly must send two headers on ever
 
 | header | value |
 |---|---|
-| `X-TF-Client-Name` | the bare integration token — the same value used for `api_integration` where one exists: `hermes`, `n8n` |
+| `X-TF-Client-Name` | the bare integration token — the same value used for `api_integration` where one exists: `dify`, `hermes`, `n8n` |
 | `X-TF-Client-Version` | the integration's own published version |
 
 Do not send `X-TF-Request-Origin` yourself; `api` is the transport and the server derives it, and the `tinyfish` SDK already sets its own value. Integrations that wrap the SDK set `TF_CLIENT_NAME` / `TF_CLIENT_VERSION` alongside `TF_API_INTEGRATION` instead — the SDK turns those two into the headers above from `tinyfish>=0.5.0`, and ignores them before that. `langchain` and `google-adk` set only `TF_API_INTEGRATION` today. Without any of this, telemetry cannot tell the integration from a hand-written curl.
diff --git a/dify/.difyignore b/dify/.difyignore
index 4685c5e..c20647e 100644
--- a/dify/.difyignore
+++ b/dify/.difyignore
@@ -182,3 +182,4 @@ Thumbs.db
 #  To prevent packaging repetitively
 *.difypkg
 
+tests/
diff --git a/dify/manifest.yaml b/dify/manifest.yaml
index a96685e..ee00de3 100644
--- a/dify/manifest.yaml
+++ b/dify/manifest.yaml
@@ -1,4 +1,4 @@
-version: 0.0.4
+version: 0.0.5
 type: plugin
 author: tinyfish
 name: tinyfish-web-agent
@@ -32,7 +32,7 @@ plugins:
 tags:
   - productivity
 meta:
-  version: 0.0.4
+  version: 0.0.5
   arch:
     - amd64
     - arm64
diff --git a/dify/requirements.txt b/dify/requirements.txt
index 69adc2d..53d07c9 100644
--- a/dify/requirements.txt
+++ b/dify/requirements.txt
@@ -1 +1,2 @@
 dify_plugin>=0.4.0,<0.7.0
+pyyaml~=6.0
diff --git a/dify/tests/__init__.py b/dify/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/dify/tests/test_headers.py b/dify/tests/test_headers.py
new file mode 100644
index 0000000..f697c10
--- /dev/null
+++ b/dify/tests/test_headers.py
@@ -0,0 +1,32 @@
+import re
+from pathlib import Path
+from types import SimpleNamespace
+
+from tools.base import TinyfishMixin
+from tools.constants import PLUGIN_VERSION
+
+MANIFEST = Path(__file__).resolve().parents[1] / "manifest.yaml"
+
+
+def _tool() -> TinyfishMixin:
+    tool = TinyfishMixin()
+    tool.runtime = SimpleNamespace(credentials={"api_key": "tf_test"})  # type: ignore[attr-defined]
+    return tool
+
+
+def test_headers_identify_the_plugin() -> None:
+    headers = _tool()._api_headers
+    assert headers["X-API-Key"] == "tf_test"
+    assert headers["X-TF-Client-Name"] == "dify"
+    assert headers["X-TF-Client-Version"] == PLUGIN_VERSION
+
+
+def test_plugin_version_is_a_real_release_version() -> None:
+    # The publish workflow greps `^version:` — same anchor the constant uses.
+    assert re.fullmatch(r"\d+\.\d+\.\d+", PLUGIN_VERSION), PLUGIN_VERSION
+    # Column 0 only: meta.version is indented and is the manifest-format version.
+    assert re.search(
+        rf"^version: {re.escape(PLUGIN_VERSION)}$",
+        MANIFEST.read_text(encoding="utf-8"),
+        re.MULTILINE,
+    )
diff --git a/dify/tools/base.py b/dify/tools/base.py
index d1bb0e5..f30fef0 100644
--- a/dify/tools/base.py
+++ b/dify/tools/base.py
@@ -2,7 +2,7 @@
 
 import httpx
 
-from tools.constants import API_BASE_URL
+from tools.constants import API_BASE_URL, PLUGIN_VERSION
 
 
 class TinyfishMixin:
@@ -10,7 +10,12 @@ class TinyfishMixin:
 
     @property
     def _api_headers(self) -> dict[str, str]:
-        return {"X-API-Key": self.runtime.credentials["api_key"]}
+        # Without these, telemetry cannot tell the plugin from raw curl.
+        return {
+            "X-API-Key": self.runtime.credentials["api_key"],
+            "X-TF-Client-Name": "dify",
+            "X-TF-Client-Version": PLUGIN_VERSION,
+        }
 
     def _tf_request(
         self,
diff --git a/dify/tools/constants.py b/dify/tools/constants.py
index 0b0d72c..9ea0e55 100644
--- a/dify/tools/constants.py
+++ b/dify/tools/constants.py
@@ -1 +1,19 @@
+from pathlib import Path
+
+import yaml
+
 API_BASE_URL = "https://agent.tinyfish.ai"
+
+# Top-level `version` is the plugin; `meta.version` is the manifest format.
+_MANIFEST = Path(__file__).resolve().parents[1] / "manifest.yaml"
+
+
+def _manifest_version() -> str:
+    try:
+        version = yaml.safe_load(_MANIFEST.read_text(encoding="utf-8")).get("version")
+    except (OSError, yaml.YAMLError, AttributeError):
+        version = None
+    return str(version) if version else "0+unknown"
+
+
+PLUGIN_VERSION = _manifest_version()