#protocols

11 resources and 5 guides tagged #protocols on ChangeGamer.

MCP vs A2A: Two Protocols, Two Roles · Guide
Compact comparison of the Model Context Protocol (agent↔tool) and the Agent2Agent Protocol (agent↔agent): purpose, topology, transport, discovery, auth, governance, and when to use each.
MCP Server Authentication: OAuth 2.1 for Remote Servers · Reference
How OAuth 2.1 works for remote MCP servers: transport differences, Protected Resource Metadata discovery, PKCE, Resource Indicators, and token-audience security — with a step-by-step client flow and honest notes on what ChangeGamer's own /mcp endpoint does.
MCP Primitives: Resources, Prompts, Sampling, and Elicitation · Reference
Deep reference on the six MCP capability primitives beyond tools — who controls each, the exact JSON-RPC method names, and when to use Resources vs Tools — verified against the 2025-06-18 and 2025-11-25 spec revisions.
Building an MCP Server · Guide
Implementation guide for MCP servers: architecture roles, the three server primitives, stdio vs Streamable HTTP transports, official SDKs, server lifecycle, remote-server concerns, testing with MCP Inspector, and publishing to the official registry.
Generative UI and Agent-to-UI Protocols · Guide
How agents drive UI dynamically: the AG-UI protocol, framework options (Vercel AI SDK, CopilotKit, assistant-ui, LangGraph), streaming component patterns, and human-in-the-loop UI design.
MCP vs Function Calling: When to Use Which · Reference
Direct comparison of provider-native function/tool calling and the Model Context Protocol — architecture, decision criteria, and how they compose.
Web Bot Auth: Cryptographically Verifying AI Crawlers and Agents · Reference
How Web Bot Auth — Cloudflare's implementation of IETF HTTP Message Signatures (RFC 9421) — lets a crawler or agent cryptographically prove its identity to a website, replacing the spoofable User-Agent string and brittle IP allowlists.
MCP Apps Explained: The Official Interactive-UI Extension for MCP · Reference
What MCP Apps (SEP-1865) is: the ui:// resource scheme and sandboxed-iframe/JSON-RPC bridge it defines for MCP tools to return rendered UI instead of plain text, how it relates to the community MCP-UI project and OpenAI's Apps SDK, and which hosts support it.
MCP Goes Stateless: The 2026-07-28 Spec Revision Explained · Reference
What changes in MCP's largest revision since launch: SEP-2575/SEP-2567 remove the session handshake and Mcp-Session-Id header for explicit state handles, new Mcp-Method/Mcp-Name routing headers, full JSON Schema 2020-12 tool schemas, and six authorization-hardening SEPs — shipped as final, on schedule, on 2026-07-28.
NLWeb Explained: Microsoft's Natural-Language Query Protocol for Websites · Reference
What NLWeb is: the open, MIT-licensed protocol that lets a site answer natural-language questions over its own Schema.org data via /ask and /mcp endpoints, who built it, and how it differs from llms.txt, AGENTS.md, and a generic MCP server.
WebMCP: Browser-Native Tool Registration for In-Page AI Agents · Reference
What WebMCP is: the W3C Web Machine Learning Community Group browser API letting a page register its own tools (via document.modelContext or plain HTML forms) for an in-browser agent to call directly, Chrome's 149-156 origin trial, and how it differs from MCP itself.

Guides

MCP Server in Production: How to Build, Ship and Run One · pillar guide
The operator playbook for taking an MCP server past the quickstart: transport choice, OAuth 2.1 auth, tool design, versioning against a moving spec, testing across clients, distribution, observability, cost and the failure modes that show up once real clients connect.
stdio vs. Streamable HTTP for MCP Servers: A Decision Framework · guide
Which MCP transport to build against and why: the single-client-vs-shared decision rule, how state works without a session handshake under the 2026-07-28 spec, the auth-model switching cost, and what actually breaks migrating off HTTP+SSE.
How to Implement OAuth 2.1 for an MCP Server · guide
A wire-level implementation walkthrough for OAuth 2.1 on a remote MCP server: what the discovery documents actually contain, CIMD vs. Dynamic Client Registration in your server code, per-SEP detail from the 2026-07-28 hardening set, and token-validation mechanics.
MCP Server Versioning and Spec Migration: An Operator Playbook · guide
A migration runbook for MCP server operators: feature-detecting via capabilities instead of hard protocolVersion branching, a dual-version fleet rollout with rollback triggers, a compatibility shim for legacy clients still sending initialize, and a deprecation calendar built off the 12-month SEP-2577 floor.
MCP Tools vs Resources vs Prompts: How to Choose the Right Primitive · guide
A decision procedure for MCP's three server-side primitives — who controls each one, a worked example of what it costs to expose a Resource as a Tool by mistake, and how Sampling and Elicitation fit as the client-side counterparts.