Logging Evaluation Runs on Custom Data Traces in Phoenix Cloud

Sangram · 2025-06-17T10:36:18.478Z

Hi @Mikyo, we need to log the evaluation run on custom data traces in the Phoenix Cloud app. Could you please guide us on how to log the traces there?

To log custom data traces to the Phoenix Cloud app, use the px.Client().log_traces(trace_dataset, project_name="your-project") method, where trace_dataset is your trace data and project_name specifies the destination project. Make sure to set the PHOENIX_COLLECTOR_ENDPOINT and PHOENIX_CLIENT_HEADERS (with your API key) environment variables to point to the Phoenix Cloud endpoint before logging traces. See this example and docs for details.Would you like more detail or a code example?Sources: - Slack: log_traces method and project_name - Evaluating Phoenix Traces (setup and logging)

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