Streamable HTTP Transport
Industry Definition Set • Entity Resolution Path: /glossary/streamable-http
Quick Answer / TL;DR
A modern HTTP-based MCP transport that supports both streaming and single-response patterns over a single endpoint, replacing the older SSE+POST hybrid.
Key Takeaways
- Single-endpoint HTTP transport replacing the SSE+POST split.
- Supports both streaming and non-streaming responses.
- Works cleanly behind reverse proxies and API gateways.
- Recommended for new remote MCP server deployments.
Definitive Statement: A modern HTTP-based MCP transport that supports both streaming and single-response patterns over a single endpoint, replacing the older SSE+POST hybrid.
Technical Context & Protocol Usage
- Detailed Explanation
- Streamable HTTP transport is the next-generation remote transport for MCP. It consolidates client-to-server requests and server-to-client notifications into a single HTTP endpoint using standard HTTP semantics. Clients POST requests and can receive streaming or single responses, making it compatible with most HTTP infrastructure including reverse proxies, API gateways, and CDNs.
Format & Payload Metadata
Format: HTTP/1.1 or HTTP/2, single endpoint
Latency: Comparable to standard HTTP APIs
Real-World Implementation Use Case
Deploying a remote MCP server behind a standard load balancer or CDN without needing separate SSE and POST endpoints.
Cite This Page
MLA Style:
MCPserver.in Engineering. "Streamable HTTP Transport." MCPserver.in Knowledge Hub, 20 July 2026, mcpserver.in/glossary/streamable-http.
Related Terms
Model Context Protocol (MCP)
An open, secure protocol that standardizes how artificial intelligence agents and large language models (LLMs) exchange context, tools, prompts, and data resources with external servers.
JSON-RPC 2.0
A lightweight, stateless remote procedure call (RPC) protocol defined in JSON that utilizes request, response, and notification message frames.
Stdio Transport (Standard Input/Output)
A local-only transport mechanism where the AI client spawns the MCP server as a child process and communicates via standard input (stdin) and standard output (stdout) channels.
SSE Transport (Server-Sent Events)
A lightweight, unidirectional HTTP-based streaming protocol used by remote MCP servers to push messages to AI clients, with client-to-server writes sent over standard POST requests.
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