Send to only OTEL collector: Authentication failed for https://api.smith.langchain.com/runs/multipart. HTTPError('401 Client Error: Unauthorized for url: https://api.smith.langchain.com/runs/multipart'

LangSmith Product Help Observability & Evals
1

Hi all, I want to send data only to an OpenTelemetry collector.

I can see the data hitting the collector, so that works, but how do I prevent the 401 code as it’s also trying to export to https://api.smith.langchain.com/runs/multipart

set OPENAI_API_BASE=https://my.endpoint.com/api/.../v1
set OPENAI_API_KEY=REDACTED
set LANGSMITH_TRACING=true
set LANGSMITH_OTEL_ENABLED=true
set OTEL_SERVICE_NAME=langchain
set OTEL_EXPORTER_OTLP_ENDPOINT=http://localhost:4318
python app.py

Where app.py is just something basic:

from langchain.agents import create_agent

def get_weather(city: str) -> str:
    """Get weather for a given city."""
    return f"It's always sunny in {city}!"

agent = create_agent(
    model="gpt-4o",
    tools=[get_weather],
    system_prompt="You are a helpful assistant",
)

# Run the agent
output = agent.invoke(
    {"messages": [{"role": "user", "content": "what is the weather in sf"}]}
)

print(output)
2

@adam.gardner Hybrid tracing is the default in LangSmith version ≥ 0.4.1.

To send traces only to your OTEL endpoint, set:LANGSMITH_OTEL_ONLY="true" (Recommendation: use langsmith ≥ 0.4.25.)