Change8
Error2 reports

Fix UnprocessableEntityError

in Anthropic SDK

Solution

"UnprocessableEntityError" in anthropic-sdk often arises from incorrect or missing data in your API request body like misspelled fields or wrong data types. Carefully review your request payload for compliance with the expected schema in the Anthropic API documentation, paying special attention to required fields and allowed values. Ensure your code accurately serializes the data before sending it in the request.

Timeline

First reported:Aug 10, 2025
Last reported:Oct 27, 2025

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Fix UnprocessableEntityError in Anthropic SDK | Change8