Adding Data to a Dataset via REST API: Is It Possible?

Peter K. · 2025-05-15T22:54:18.207Z

Is there a way to add to a dataset via the rest api? I'm only seeing a way to upload/create in it

Yes, you can append to an existing dataset via the REST API using the POST /v1/datasets/upload endpoint with the action parameter set to "append". The request body must include the dataset name and the new examples to add, either as JSON or multipart/form-data. This allows you to add new examples to an existing dataset, not just create a new one. See the API details and example payloads in the official documentation and source code.Would you like a code example or more details on the request format?Sources: - Phoenix SDK API Reference: Datasets - phoenix/server/api/routers/v1/datasets.py

💡 Hint: Mention RunLLM in the thread for followups.

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