MCP Protocol

MCP authorization architecture

Deep-dive on MCP's authorization spec: protected-resource metadata discovery, dynamic client registration, PKCE consent flows…

MCP Authentication Models

How MCP servers authenticate clients (and vice versa).

MCP request cancellation architecture

Deep-dive on Model Context Protocol cancellation: the notifications/cancelled message, request-id tracking and abort primitives, threading cancellatio…

MCP capability negotiation architecture

Deep-dive on MCP capability negotiation: the initialize handshake where client and server exchange protocol versions and capabilities, the intersectio…

MCP Client Architecture in Depth

A 2500-word walkthrough of MCP client architecture: session per server, capability merge, tool namespace, resource aggregator, approval UI, health, au…

MCP Client Patterns

Discovery, multiplexing, capability matching.

MCP Client and Server

The division of responsibilities between MCP client (LLM app) and server (integration provider), and how they cooperate.

MCP completion -- argument autocompletion for tools and prompts

Deep-dive on the MCP completion capability: the argument-filling need, the server offering autocompletion suggestions, context-awareness, completion f…

MCP elicitation

Deep-dive on MCP elicitation: server requests for structured user input, schema-validated responses, client mediation and the trust boundary, user con…

MCP error handling architecture

Deep-dive on Model Context Protocol error handling: the JSON-RPC code space, why tool failures ride inside successful results with isError, cancellati…

MCP gateway architecture

Deep-dive on MCP gateways: merged policy-filtered catalogs, namespace mapping, OAuth token exchange per backend, session and notification fan-out, tra…

MCP logging architecture

Deep-dive on MCP logging: logging/setLevel, notifications/message, level enum, sinks, structured payload, throttle, PII scrub.

Multi-tenant MCP server architecture

Deep-dive on multi-tenancy for MCP servers: why isolation must live in the authenticated session rather than tool arguments, how identity flows from t…

MCP Notifications: Fire-and-Forget Messaging in the Model Context Protocol

How MCP uses id-less JSON-RPC notifications for list-changed events, progress, resource updates, and cancellation — and the idempotent, backpressure-a…

MCP OAuth Authorization

How MCP servers authorize tool callers.

Model Context Protocol Overview

What Anthropic's MCP is, why standardizing agent-tool integration matters, and how it enables a plug-and-play ecosystem.

MCP pagination architecture

Deep-dive on Model Context Protocol pagination: cursor-based paging for resources/tools/prompts lists, opaque nextCursor tokens, keyset vs offset resu…

MCP progress architecture

Deep-dive on MCP progress notifications: progress tokens, notifications/progress, cancellation, throttling, timeouts, UX.

MCP Prompt Templates

Server-defined reusable prompts that LLM clients can discover and parametrize.

MCP Prompts

How MCP servers can provide prompt templates that clients use to compose LLM requests.

MCP prompts architecture

Deep-dive on MCP prompts: templates, argument schema, auto-complete, client UI, versioning, localization, governance.

MCP Protocol Details

The technical protocol of MCP: JSON-RPC over stdio or SSE, message shapes, request/response flow.

MCP rate limiting architecture

Deep-dive on rate limiting an MCP tool server: how a per-client, per-tool token bucket admits or rejects each call — weighting expensive tools more, a…

MCP server registry -- discovering and managing servers

Deep-dive on MCP server registries: the manual-config scaling problem, the registry catalog, capability-based discovery, server metadata, publishing, …

Remote MCP Servers in 2026

Hosted MCP and the marketplace dynamics.

MCP Resource Subscriptions

How clients subscribe to resource updates and receive change notifications.

MCP resource subscriptions architecture

Deep-dive on MCP resource subscriptions: capability negotiation, resources/subscribe, the resources/updated notification, server-side subscription reg…

MCP Resources

How MCP servers expose data (files, DB rows, API responses) to LLMs via the resources primitive.

MCP resources architecture

Deep-dive on MCP resources: URI templates, list + read, subscribe + change notifications, access control, caching, and audit.

MCP roots architecture

Deep-dive on MCP roots: client declares roots, roots/list, path validation, multi-root, change notify, user consent, audit.

MCP sampling architecture

Deep-dive on MCP sampling: sampling/createMessage, host arbitration, model preferences, context inclusion, trust boundary, audit.

MCP Security

How to secure MCP deployments: sandbox untrusted servers, user consent for tool calls, and trust boundary management.

MCP Security Model

Auth, capabilities, and what a compromised server can do.

MCP Server Architecture in Depth

A 2500-word walkthrough of MCP server architecture: client, transport, capability negotiation, resources/tools/prompts, backend systems, and safety.

MCP Server Design Patterns

Tool surface, error semantics, observability.

MCP sessions -- stateful connections between client and server

Deep-dive on MCP sessions: the stateful client-server connection, initialization (handshake, version), capability negotiation (extensibility and compa…

MCP SSE Transport

How the SSE transport works, its dual-channel design, and why it's being replaced by Streamable HTTP.

MCP stdio Transport

How stdio transport works: parent spawns child, messages over stdin/stdout, and when it's the right choice.

MCP structured tool output architecture

Deep-dive on structured tool output in the Model Context Protocol: instead of flattening a tool's result into prose the calle…

MCP Server Testing Patterns

Unit and integration testing for MCP servers.

MCP tool annotations architecture

Deep-dive on MCP tool annotations: readOnlyHint, destructiveHint, idempotentHint, openWorldHint, and title; how clients turn them into auto-run/confir…

MCP Tools

How MCP servers expose callable functions (tools) with schemas, and how LLMs invoke them.

MCP Tools Architecture in Depth

A 2500-word walkthrough of MCP tools: tools/list, schemas, tools/call, structured results, safety metadata, elicitation, sampling, streaming.

MCP Transports

The transport options in MCP: stdio for local, SSE for remote, and Streamable HTTP for modern deployment.

MCP transport architecture

Deep-dive on MCP transports: stdio, HTTP+SSE, streamable HTTP, JSON-RPC framing, handshake, capability negotiation, and resumable sessions.

MCP Transport Layer Deep-Dive: stdio vs. SSE for Remote Resources

MCP Transport

When each transport fits.

MCP streaming transport architecture

Deep-dive on MCP streaming transport: SSE frames, chunked deltas, progress events, backpressure, cancel, reconnect.

MCP versioning architecture

Deep-dive on Model Context Protocol versioning: how the initialize handshake negotiates a shared protocol version, how capability flags let features e…

MCP Versioning Strategy

Capability evolution without breaking clients.

MCP vs OpenAI Function Calling

Two protocols for the same idea — when to use each.

Solving the "N x M" Integration Problem with MCP Servers and Clients