Topic Guides

Topic guides explain the Agentic Web Stack by responsibility area. Read them when you want practical context, example use cases, and representative metadata, API, protocol, or workflow sketches.

Web Foundations

These topics cover the substrate that agent systems inherit from the web and API ecosystem.

• Discovery - Agent Cards, well-known URLs, OpenAPI descriptions, crawler hints, sitemaps, and registries.
• Identity - OAuth2, OpenID Connect, JWTs, scopes, claims, delegated access, and policy enforcement.
• APIs - REST, GraphQL, OpenAPI, JSON Schema, service contracts, and deterministic operation surfaces.

Agent Runtime

These topics cover the agent-specific and AI infrastructure layers that sit above ordinary APIs.

• Agent Protocols - MCP, A2A, tasks, tools, resources, prompts, streaming, and agent capability exchange.
• Memory - Vector databases, RAG, knowledge graphs, embeddings, retrieval pipelines, and long-term state.
• Models - Hosted models, local models, inference runtimes, gateways, model routing, and model selection.

Application Layer

This topic covers the final product and workflow layer built from the lower stack.

• Applications - Research, coding, enterprise, and operational agents composed from discovery, identity, APIs, protocols, memory, and models.

Related Pages

• Technology Stack - The seven stack levels and how the topic guides map to them.
• Glossary - Definitions for terms used across the topic guides.
• Architecture Flows - Diagrams showing how the layers work together.