Hey everyone, I’m having trouble getting LangSmith to work with the latest LangChain tutorials. I’ve been following the official documentation and trying to implement v2 tracing but can’t get it to show up in my LangSmith dashboard.
I’ve tried setting up different environment variables and creating new projects but nothing seems to work. The traces just don’t appear at all. I’m using LangChain v3 and wondering if there are additional configuration steps beyond just setting the environment variables.
Has anyone else run into this issue? I’ve tried various suggestions but still no luck getting the tracing to function properly.
Your environment variables might look right, but double-check you’re actually exporting them. I had the same issue when variables weren’t sticking between different shells or IDE terminals. Run echo $LANGCHAIN_TRACING_V2 to see if it’s actually set. The project name got me too - if you’re using a custom project in LangSmith, it needs to match LANGCHAIN_PROJECT exactly. Try restarting your Python kernel or terminal completely after setting variables. Sometimes they don’t get picked up without a fresh restart.
Debugging tracing configs is a nightmare. Been there - environment variables and scattered configs just destroy your dev time.
Skip the LangSmith headaches and automate the whole thing. Build a monitoring system that grabs your LangChain operations, processes everything, and routes it where you need it.
We had the same mess with inconsistent tracing tools. I built an automated pipeline that handles collection, formatting, and routing. No more env var hell or missing traces.
Best part? You control exactly what gets tracked and how it’s processed. Add your own alerts, filters, whatever you need.
Latenode handles the heavy lifting for this stuff. Connect your LangChain apps to any monitoring platform without fighting SDK issues.
Sounds like a LangChain v3 compatibility issue. The tracing implementation changed between versions - hit the same problem when I upgraded. V3 won’t work with just environment variables anymore. You’ve got to import and initialize the LangSmith client manually in your code before running chains. Double-check your LANGCHAIN_ENDPOINT too - should be https://api.smith.langchain.com by default. Corporate firewall? That’ll block trace submissions even when everything looks configured right.
LangSmith tracing is a nightmare. All those environment variables, SDK versions, and manual setup steps waste so much time.
Had the same problems when our team needed observability for LangChain apps. Instead of fighting tracing configs that break with every update, I automated everything.
Built a workflow that grabs LangChain operations automatically and pushes structured data to our monitoring stack. No more missing traces or compatibility hell. It handles collection, formatting, and routing to whatever platform you’re using.
Doesn’t matter what LangChain version you’re on. You get consistent monitoring without relying on their buggy tracing. Plus you can add custom metrics, alerts, and filters that actually help.
Latenode makes this automation dead simple. Hook your LangChain apps to any observability tool without SDK headaches.
weird one but try clearing your browser cache for langsmith dashboard. had traces working locally but dashboard showed nothing until i did a hard refresh. also make sure you’re not mixing v2 and v3 imports in same script - that messed me up for days
i had the same prob! just make sure ur using LANGCHAIN_TRACING_V2=true. also check ur API key on LangSmith, my old one borked too, couldn’t figure it out at first!
Check if your langchain version works with v2 tracing. Some v3 builds had weird conflicts. Try downgrading to a stable release first, then add the env vars back. Fixed my empty dashboard issue.