# 401 Client Error **URL:** \ **Category:** Beginners\ **Created:** [February 28, 2025, 12:40pm UTC](https://discuss.huggingface.co/t/401-client-error/143408 "2025-02-28T12:40:16Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Lohith97](https://avatars.discourse-cdn.com/v4/letter/l/f4b2a3/32.png) [@Lohith97](https://discuss.huggingface.co/u/Lohith97)\ **Post date:** [February 28, 2025, 12:40pm UTC](https://discuss.huggingface.co/t/401-client-error/143408/1 "2025-02-28T12:40:16Z")
Hello, I am very new to langchain and i am facing an error. Let me show my entire code and the error. Code: `from langchain\_huggingface import ChatHuggingFace, HuggingFaceEndpoint from dotenv import load\_dotenv load\_dotenv() llm = HuggingFaceEndpoint( repo\_id=‘TinyLlama/TinyLlama-1.1B-Chat-v1.0’, task=“text-generation”, ) model = ChatHuggingFace(llm=llm) result = model.invoke(“What is the Capital of India?”) print(result.content)` Error: `Traceback (most recent call last): File “C:\Users\HP\Desktop\LangChain\venv\lib\site-packages\huggingface\_hub\utils\_http.py”, line 409, in hf\_raise\_for\_status response.raise\_for\_status() File “C:\Users\HP\Desktop\LangChain\venv\lib\site-packages\requests\models.py”, line 1024, in raise\_for\_status raise HTTPError(http\_error\_msg, response=self) requests.exceptions.HTTPError: 401 Client Error: Unauthorized for url: [https://router.huggingface.co/hf-inference/models/TinyLlama/TinyLlama-1.1B-Chat-v1.0/v1/chat/completions](https://router.huggingface.co/hf-inference/models/TinyLlama/TinyLlama-1.1B-Chat-v1.0/v1/chat/completions) The above exception was the direct cause of the following exception: Traceback (most recent call last): File “C:\Users\HP\Desktop\LangChain\ChatModels\chatmodel\_hf.py”, line 13, in result = model.invoke(“What is the Capital of India?”) File “C:\Users\HP\Desktop\LangChain\venv\lib\site-packages\langchain\_core\language\_models\chat\_models.py”, line 284, in invoke self.generate\_prompt( File “C:\Users\HP\Desktop\LangChain\venv\lib\site-packages\langchain\_core\language\_models\chat\_models.py”, line 860, in generate\_prompt return self.generate(prompt\_messages, stop=stop, callbacks=callbacks, \*\*kwargs) File “C:\Users\HP\Desktop\LangChain\venv\lib\site-packages\langchain\_core\language\_models\chat\_models.py”, line 690, in generate self.\_generate\_with\_cache( File “C:\Users\HP\Desktop\LangChain\venv\lib\site-packages\langchain\_core\language\_models\chat\_models.py”, line 925, in \_generate\_with\_cache result = self.\_generate( File “C:\Users\HP\Desktop\LangChain\venv\lib\site-packages\langchain\_huggingface\chat\_models\huggingface.py”, line 370, in \_generate answer = self.llm.client.chat\_completion(messages=message\_dicts, \*\*kwargs) File “C:\Users\HP\Desktop\LangChain\venv\lib\site-packages\huggingface\_hub\inference\_client.py”, line 956, in chat\_completion data = self.\_inner\_post(request\_parameters, stream=stream) File “C:\Users\HP\Desktop\LangChain\venv\lib\site-packages\huggingface\_hub\inference\_client.py”, line 321, in \_inner\_post hf\_raise\_for\_status(response) File “C:\Users\HP\Desktop\LangChain\venv\lib\site-packages\huggingface\_hub\utils\_http.py”, line 481, in hf\_raise\_for\_status raise \_format(HfHubHTTPError, str(e), response) from e huggingface\_hub.errors.HfHubHTTPError: 401 Client Error: Unauthorized for url: [https://router.huggingface.co/hf-inference/models/TinyLlama/TinyLlama-1.1B-Chat-v1.0/v1/chat/completions](https://router.huggingface.co/hf-inference/models/TinyLlama/TinyLlama-1.1B-Chat-v1.0/v1/chat/completions) (Request ID: Root=1-67c0aa28-0237850d7483818d72a13bd6;7c29eb7d-2c6e-4624-ad02-f44ad003c9da) Invalid username or password.` ---
**Author:** ![John6666](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/john6666/32/27664_2.png) [@John6666](https://discuss.huggingface.co/u/John6666)\ **Post date:** [February 28, 2025, 1:18pm UTC](https://discuss.huggingface.co/t/401-client-error/143408/2 "2025-02-28T13:18:37Z")
> **[ChatHuggingFace | 🦜️🔗 LangChain](https://python.langchain.com/docs/integrations/chat/huggingface/#credentials)** > > This will help you getting started with langchainhuggingface chat models. For detailed documentation of all ChatHuggingFace features and configurations head to the API reference. For a list of models supported by Hugging Face check out this page. Since this is a function that uses an online service, you will need to set up the Hugging Face token in advance. If you want to run the model locally, please use the following method. Also, if you are not sure, it is easier to use Ollama than LangChain. > **[Hugging Face Local Pipelines | 🦜️🔗 LangChain](https://python.langchain.com/docs/integrations/llms/huggingface_pipelines/)** > > Hugging Face models can be run locally through the HuggingFacePipeline class. ---
**Author:** ![Lohith97](https://avatars.discourse-cdn.com/v4/letter/l/f4b2a3/32.png) [@Lohith97](https://discuss.huggingface.co/u/Lohith97)\ **Post date:** [February 28, 2025, 2:59pm UTC](https://discuss.huggingface.co/t/401-client-error/143408/3 "2025-02-28T14:59:03Z")
It’s resolved yesterday itself. Sometimes I’m getting it and sometimes the error is not showing up ---
**Author:** ![Sona91](https://avatars.discourse-cdn.com/v4/letter/s/7c8e57/32.png) [@Sona91](https://discuss.huggingface.co/u/Sona91)\ **Post date:** [April 14, 2025, 7:31am UTC](https://discuss.huggingface.co/t/401-client-error/143408/4 "2025-04-14T07:31:35Z")
How did you resolve it?? I am facing similar error. ---
**Author:** ![John6666](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/john6666/32/27664_2.png) [@John6666](https://discuss.huggingface.co/u/John6666)\ **Post date:** [April 14, 2025, 7:53am UTC](https://discuss.huggingface.co/t/401-client-error/143408/5 "2025-04-14T07:53:31Z")
There are too many possible causes of 401 errors, so it’s difficult to fix them, but it seems that in many cases, using **login()** will fix the problem. > [@Error 401 Client Error: Unauthorized for url](https://discuss.huggingface.co/t/error-401-client-error-unauthorized-for-url/19714): > > When using model card of my private speech recognition model with LM, I got this error: 401 Client Error: Unauthorized for url: [https://huggingface.co/api/models/taliai/tali-asr-with-lm/revision/main](https://huggingface.co/api/models/taliai/tali-asr-with-lm/revision/main) while the same model without lm works fine. Is there anything wrong on my model or model card or … Any help is appreciated. ---
**Author:** ![abed211051](https://avatars.discourse-cdn.com/v4/letter/a/0ea827/32.png) [@abed211051](https://discuss.huggingface.co/u/abed211051)\ **Post date:** [April 21, 2025, 4:22pm UTC](https://discuss.huggingface.co/t/401-client-error/143408/6 "2025-04-21T16:22:20Z")
Set this variable {HUGGINGFACEHUB\_API\_TOKEN=“your token”} in .env file, then try to run the code again, as you are already calling {load\_dotenv()}. Note: variable {HUGGINGFACEHUB\_ACCESS\_TOKEN} doesn’t work so set variable as {HUGGINGFACEHUB\_API\_TOKEN}. ---
**Author:** ![ShivangiTripathi](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/shivangitripathi/32/48411_2.png) [@ShivangiTripathi](https://discuss.huggingface.co/u/ShivangiTripathi)\ **Post date:** [May 28, 2025, 10:55am UTC](https://discuss.huggingface.co/t/401-client-error/143408/7 "2025-05-28T10:55:50Z")
Hello @Lohith97 , can you please let me know that how did it get resolved as I am facing the same issue and not able to fix it, thanks.