September 2026
Intermediate to advanced
350 pages
10h 3m
English
Content preview from AI Agents with MCP
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Chapter 8. Connecting Clients and Servers: MCP Transports
The MCP’s transport layer is what links clients and servers together, enabling them to send and receive messages. Understanding the transport layer from the JSON-RPC level where it interacts directly with streaming data up through the SDK abstractions and managing real-life connections and custom transports is crucial to effectively debugging and securing your own MCP projects. This chapter explores the MCP transport layer in depth, covering the JSON-RPC foundations of the layer, the connection lifecycle from the transport’s perspective, and the transport types available in MCP by default as well as custom transports. Moving from the low-level design to the high-level implementation, we will dig into practical issues, like implementing your own custom transport, using security threat modeling and mitigation strategies, and debugging and testing your transports.
Figure 8-1 shows the MCP stack in layers of abstraction, from the top-level application (a server or a client) at the top, which rests upon the MCP itself, under which lie the session objects that manage the correlation between sent requests and received responses, and the plumbing to the transport layer below it. The transport layer interacts directly with the network layer
below it, framing and serializing messages and adding them to streams managed by the session objects. (ClientSession lives for the duration of the host application, while ServerSession lives ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.