Resource	Description
Protocols and standards
Model Context Protocol	The canonical protocol for connecting AI agents and applications to tools, data, APIs, and external systems.
Agent2Agent Protocol	Open protocol for agent-to-agent discovery and communication, including the Agent Card pattern for publishing agent capabilities.
Agent Communication Protocol	Open standard from IBM Research and the Linux Foundation for agent-to-agent messaging, task hand-off, and lifecycle. Layers above MCP — where MCP exposes tools to a single agent, ACP coordinates between agents across frameworks and runtimes.
OpenAPI Specification	Mature standard for describing HTTP APIs in a machine-readable way. Still one of the most important foundations for agent-usable software.
agents.json	Emerging proposal for exposing agent-facing API and interaction metadata. Relevant for making products more legible to autonomous systems.
llms.txt	Proposed convention for publishing a Markdown entry point that helps LLMs and agents understand a website's most important content.
WebMCP	Browser-side pattern for exposing website functionality as structured tools rather than forcing agents to rely only on scraping or DOM navigation.
Agent Skills	Lightweight format for packaging task-specific instructions, scripts, templates, and resources that agents can use across contexts.
OAuth 2.0 Protected Resource Metadata	Standard for publishing metadata about OAuth-protected resources. Relevant for agent authentication and protected API discovery.
Agent-to-User Interface Protocol	Protocol for agents returning structured user interfaces rather than only text. Relevant for agent-native product experiences.
Agent-User Interaction Protocol	Event-based protocol for streaming agent state, text, tool calls, and UI interactions to frontends.
Universal Commerce Protocol	Open standard from Google and Shopify for agentic commerce — discovery, checkout, orders, identity. Built on REST/JSON-RPC with MCP, A2A, and AP2 support built in.
Payments and commerce protocols
Machine Payments Protocol	Open protocol for machine-to-machine payments. Designed for APIs, tools, and content that agents can pay for directly in the request flow.
MPP specifications	Technical specification surface for MPP, including payment authentication, charge, discovery, MCP transport, and payment-method-specific flows.
x402	Internet-native payment protocol based on HTTP `402 Payment Required`. Important for paid APIs, content, services, and agent-to-server transactions.
Agentic Commerce Protocol	Open commerce protocol for agent-mediated shopping and checkout while preserving merchant control over products, orders, and payment flows.
Stripe Agentic Commerce	Stripe's canonical documentation for enabling secure commerce between buyers, agents, and businesses.
Agent Payments Protocol	Protocol for agent payments with authorization, mandates, and auditability. Relevant where agents transact on behalf of humans or businesses.
AI platform and developer resources
OpenAI Developers	Official developer hub for OpenAI's agent-facing surfaces, including apps, tools, commerce, and ChatGPT-connected product patterns.
OpenAI Apps SDK	Canonical source for building ChatGPT-connected apps backed by MCP servers and machine-native interfaces.
Google Developers Blog	Official source for Google's agent protocol, interoperability, and developer platform updates.
Google Agent Protocols Guide	Useful overview of how MCP, A2A, UCP, AP2, A2UI, and AG-UI fit into agent architecture.
Anthropic Engineering	One of the highest-signal primary sources on agent design, tool design, context engineering, MCP, skills, and autonomous coding systems.
Cloudflare Agents	Cloudflare's developer platform for building and deploying agents, including Workers, Durable Objects, tools, scheduling, and MCP support.
Playwright MCP	Browser automation through MCP. Relevant for how agents interact with websites through structured browser control.
Vercel agent-browser	Browser automation CLI for agents. Useful reference for token-efficient browser interaction and headless browsing workflows.
Discovery, readiness, and machine-readable web
Markdown for Agents	Cloudflare documentation for serving Markdown versions of pages to agents through content negotiation.
Content Signals Policy	Policy mechanism for expressing preferences around search, AI input, and AI training usage.
Web Bot Auth	Proposal for cryptographically identifying legitimate bots and agents rather than relying only on user-agent strings or IP lists.
Schema.org	Shared vocabulary for structured data. Important for making products, organizations, people, events, and actions machine-readable.
JSON-LD	Linked-data JSON format commonly used with Schema.org. Useful for giving agents explicit semantic context on web pages.
Hybrid companies at the edge of the headless economy
Stripe Blog	Primary source for Stripe's thinking on agentic commerce, payment infrastructure, internet-native business models, and merchant readiness.
Ramp for Agents	Strong example of incumbent business software becoming explicitly agent-facing through CLI and MCP-style surfaces.
Ramp CLI	Concrete implementation of a finance product exposed through a terminal and AI-agent-usable command surface.
Ramp Blog	Useful source for Ramp's agentic finance, AP automation, accounting agents, and operational AI product direction.
Cloudflare Blog	Infrastructure source for how the web adapts to agents: MCP, bot identity, content negotiation, Workers, and agent deployment.
Linear	Product company building toward human-and-agent workflows in software development and product operations.
Linear MCP Docs	Direct source for Linear's MCP server and agent-usable product surface.
Notion	Workspace product moving toward AI agents, automation, enterprise search, and machine-mediated work.
Notion MCP Docs	Official documentation for Notion's hosted MCP server, allowing AI tools to securely access Notion workspaces.
Notion Blog	Ongoing source for Notion's AI workspace, custom agents, and agent-native product direction.
Slack Blog	Official source for Slack's evolution into an AI context layer and agentic work surface.
Slack MCP Guide	Practical source for how Slack exposes workspace context and actions to AI assistants through MCP.
Related blogs and analysis streams
Fintech Brainfood	Simon Taylor's recurring analysis on fintech, payments, AI, stablecoins, wallets, and infrastructure shifts relevant to agentic commerce.
MPP Blog	Ongoing protocol source for machine payments, per-request pricing, paid APIs, and agent-to-service payment flows.
Simon Willison's Weblog	High-signal independent source on LLMs, agents, MCP, tool use, prompt injection, and machine-consumable software patterns.
Latent Space	Technical newsletter and podcast covering agents, AI engineering, infrastructure, MCP, and developer ecosystem shifts.
Every	Recurring source on AI product design, agent-native software, and emerging business models around AI workflows.
Benedict Evans	Strategy source for interface shifts, platform transitions, value capture, and market structure in technology.