📄 ai-sdk/docs/reference/stream-helpers/aws-bedrock-messages-stream
File: aws-bedrock-messages-stream.md | Updated: 11/15/2025
Source: https://ai-sdk.dev/docs/reference/stream-helpers/aws-bedrock-messages-stream
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AI SDK 5.x
Model Context Protocol (MCP) Tools
AWSBedrockAnthropicMessagesStream
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AWSBedrockAnthropicMessagesStream
======================================================================================================================================================
AWSBedrockAnthropicMessagesStream has been removed in AI SDK 4.0.
AWSBedrockAnthropicMessagesStream is part of the legacy AWS Bedrock integration. It is not compatible with the AI SDK 3.1 functions.
The AWS Bedrock stream functions are utilties that transform the outputs from the AWS Bedrock API into a ReadableStream. It uses AIStream under the hood and handle parsing Bedrock's response.
React
import { AWSBedrockAnthropicMessagesStream } from "ai"
Parameters
response:
AWSBedrockResponse
The response object returned from AWS Bedrock.
AWSBedrockResponse
body?:
AsyncIterable<{ chunk?: { bytes?: Uint8Array } }>
An optional async iterable of objects containing optional binary data chunks.
callbacks?:
AIStreamCallbacksAndOptions
An object containing callback functions to handle the start, each token, and completion of the AI response. In the absence of this parameter, default behavior is implemented.
AIStreamCallbacksAndOptions
onStart:
() => Promise<void>
An optional function that is called at the start of the stream processing.
onCompletion:
(completion: string) => Promise<void>
An optional function that is called for every completion. It's passed the completion as a string.
onFinal:
(completion: string) => Promise<void>
An optional function that is called once when the stream is closed with the final completion message.
onToken:
(token: string) => Promise<void>
An optional function that is called for each token in the stream. It's passed the token as a string.
Returns
A ReadableStream.
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AWSBedrockAnthropicMessagesStream
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