> ## Documentation Index > Fetch the complete documentation index at: https://openrouter-d02e98a0-mintlify-7021d5f4.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # OpenResponsesStreamEventResponseOutputTextAnnotationAdded - Python SDK > OpenResponsesStreamEventResponseOutputTextAnnotationAdded method reference The Python SDK and docs are currently in beta. Report issues on [GitHub](https://github.com/OpenRouterTeam/python-sdk/issues). Event emitted when a text annotation is added to output ## Fields | Field | Type | Required | Description | | ------------------ | ------------------------------------------------------------------------------------------------------------------------ | -------------------- | ----------- | | `type` | [components.TypeResponseOutputTextAnnotationAdded](/client-sdks/python/components/typeresponseoutputtextannotationadded) | :heavy\_check\_mark: | N/A | | `output_index` | *float* | :heavy\_check\_mark: | N/A | | `item_id` | *str* | :heavy\_check\_mark: | N/A | | `content_index` | *float* | :heavy\_check\_mark: | N/A | | `sequence_number` | *float* | :heavy\_check\_mark: | N/A | | `annotation_index` | *float* | :heavy\_check\_mark: | N/A | | `annotation` | [components.OpenAIResponsesAnnotation](/client-sdks/python/api-reference/components/openairesponsesannotation) | :heavy\_check\_mark: | N/A |