Retrieve a Message Batch changedapi/beta/messages/batches/retrieve
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1010This endpoint is idempotent and can be used to poll for Message Batch completion. To access the results of a Message Batch, make a request to the `results_url` field in the response.
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12Learn more about the Message Batches API in our [user guide](https://platform.claude.com/docs/en/build-with-claude/batch-processing)
12Learn more about the Message Batches API in our [user guide](https://platform.claude.com/docs/en/build-with-claude/batch-processing?sdk_languages=http)
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1414## Path parameters
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2424 The version of the Claude API you want to use.
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26 Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning).
26 Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
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2828- `"anthropic-beta": optional array of AnthropicBeta`
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