List Environments changedapi/beta/environments/list
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3434 The version of the Claude API you want to use.
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36 Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning).
36 Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
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3838- `"anthropic-beta": optional array of AnthropicBeta`
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