Issue: Authentication failed (401) for https://api.smith.langchain.com/runs/multipart

[leucir]

Issue you'd like to raise.

When executing invoke() the following error happens:

Failed to multipart ingest runs: langsmith.utils.LangSmithAuthError: Authentication failed for https://api.smith.langchain.com/runs/multipart. HTTPError('401 Client Error: Unauthorized for url: https://api.smith.langchain.com/runs/multipart', '{"detail":"Using legacy API key. Please generate a new API key."}')trace=2ea67b21-18ee-4c72-9e2e-7630faf2c7a0,id=2ea67b21-18ee-4c72-9e2e-7630faf2c7a0; trace=2ea67b21-18ee-4c72-9e2e-7630faf2c7a0,id=8ec43343-85b0-4043-b2e4-497ceb25f898; trace=2ea67b21-18ee-4c72-9e2e-7630faf2c7a0,id=11243325-4863-4264-9bc8-ff469b9f113b

I've created at least 2 new API keys, but the error persists.

The following environment variables are set:

LANGSMITH_API_KEY="lsv2_pt_nonononononononon"
LANGSMITH_ENDPOINT="https://api.smith.langchain.com"
LANGCHAIN_TRACING_V2="true"
LANGCHAIN_PROJECT="project_bond_101"

To be precise, it worked once, and then failed after that first execution.

pip list | grep lang returns:

langchain                                0.3.7
langchain-community                      0.3.5
langchain-core                           0.3.15
langchain-openai                         0.2.5
langchain-text-splitters                 0.3.2
langgraph                                0.2.45
langgraph-checkpoint                     2.0.2
langgraph-checkpoint-sqlite              2.0.1
langgraph-sdk                            0.1.35
langsmith                                0.1.142

Suggestion:

No response

[dansashalesser]

I've had the same issue, generated several keys and still not working.

[mingxuan-he]

same issue here

[sebj84]

Same for me

[sebj84]

It's solved on my side. I had to renew my langsmith API key with no obvious reason (maybe a new feature because the option "service API" seems to be available).
The new format of the key start with "lsv2_"

[dansashalesser]

@sebj84 I've also created several keys, and even after updating the keys, I'm still getting the error.

[albydeca]

Same here. Any help appreciated. Tracing project is not created when I click "New Project" in my account. Maybe this could point to the issue

[guapia233]

@sebj84 Didn't the previous key format also start with "lsv2_"😭I still can't use it to track my projects

[usman-nasim]

Also facing this issue! 😞

[usman-nasim]

hey future ai developers!

If you also ran into this issue do follow me as gratitude as I'm about to fix that for you.
The issue is make sure (don't be surprised) you are not properly authenticated. Yes i know you've created multiple api keys to sort this out but have failed.

Go to your dashboard (Langchain) go to tracing create a new project and add the project name as well in you environement

os.environ["LANGCHAIN_API_KEY"] = LANGCHAIN_API_KEY
os.environ["LANGCHAIN_TRACING_V2"] = "true"
os.environ["LANGCHAIN_ENDPOINT"] = "https://api.smith.langchain.com"
os.environ["LANGCHAIN_PROJECT"] = "your project name"

Bingo it gets resolved

[RiturajKulshresth]

Hey

When you say Dashboard, are you referring to the 'Home' button or the 'Dashboard' button(3rd from top)

I tried going to the 'Tracing projects' section (on the top left) and creating a new project. that did not resolve the issue

Does it automatically get resolved after some time @leucir @albydeca @sebj84 @dansashalesser @usman-nasim