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Vercel AI SDK Stream Parser

Vercel AI SDK Stream Parser MCP Connector for Claude

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Deterministic parser for Vercel AI SDK 3.0 Data Stream protocol chunks.

3 tools Official Updated Oct 1, 2026 Official Vinkius Partner
More Details Connect to Claude

This MCP server provides a deterministic engine to parse raw, newline-delimited strings from the Vercel AI SDK 3.0 Data Stream protocol. It allows AI agents to reliably extract structured payloads such as text chunks (0:), tool calls (2:), and routing information (b:) from streaming responses. By using parse_raw_stream, you can deconstruct complex stream segments into identifiable events, ensuring that your agent correctly interprets UI updates and triggers the necessary tool executions without losing data during the stream.

vercel-ai-sdkdata-streamprotocol-parserdeterministic-parsingstreaming-payloads

3 tools expose this connector's capabilities to your AI agent.

calculate_stream_metrics

Provides usage-related metadata for a given stream chunk

parse_raw_stream

0 stream string. Deconstructs a raw, newline-delimited stream string into structured protocol events

verify_protocol_integrity

Validates whether a given stream segment adheres to the V1/V3 protocol

See how to talk to your AI agent using Vercel AI SDK Stream Parser.

Parse this Vercel AI SDK stream chunk: '0:Hello world\n2:{"name":"get_weather","args":{"location":"London"}}\nb:route-1'

The parsed events include a text chunk with 'Hello world', a tool call for 'get_weather' in London, and a routing event for 'route-1'.

Check if this stream segment is valid: '0:Valid text\nInvalid line'

The `verify_protocol_integrity` tool would flag this as invalid because the second line lacks a recognized protocol prefix.

What are the metrics for this stream: '0:Chunk 1\n0:Chunk 2'

The `calculate_stream_metrics` tool reports an event count of 2 and provides a token estimate based on the string length.

The `parse_raw_stream` tool identifies lines starting with the '2:' prefix and uses native V8 JSON.parse to extract the structured payload, allowing you to retrieve function arguments directly.

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