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Awesome Agent Experience (AX) Awesome

A curated list of standards, protocols, tools, and resources for making technology systems accessible and usable by AI agents.

Agent Experience (AX) is to AI agents what User Experience (UX) is to humans and Developer Experience (DX) is to developers.

Contents

Frameworks & Best Practices

Established frameworks for designing agent-friendly systems. See research/ax-perspectives.md for detailed breakdowns.

The Four Pillars of AX

Matt Biilmann (Netlify), Jan 2026

  1. Access - Can the agent reach your product? Remove friction. Enable anonymous flows.
  2. Context - Does the LLM have the right information? Context engineering > prompt engineering.
  3. Tools - Are you building agent-first tooling? MCP servers, agent-specific CLIs, intuitive APIs.
  4. Orchestration - Can you trigger agent runs and provide sandboxes?

The Five AX Principles

agentexperience.ax community

  1. Human Centricity - Agents serve human needs as a medium, alongside browsers and apps.
  2. Agent Accessibility - Remove barriers. Requiring a human in the loop is an anti-pattern where not strictly necessary.
  3. Contextual Alignment - Provide robust, consistent context. Don't assume agents know enough.
  4. Agent Interactivity Patterns - Standardize communication, branding, and sensitive-flow handling.
  5. Differentiate Agent Interaction - Track agent actions separately in metrics, logs, and audit trails.

Three Production Patterns

Matt Biilmann (Netlify), Jul 2025

  1. Agent-First Onboarding - Deploy anonymously, then claim. Used by Netlify, Clerk, Prisma, Neon.
  2. Agent-Human Interactions - Bidirectional linking. Linear lets users @ mention agents from tickets.
  3. Context Engineering - llms.txt, .cursorrules, AGENTS.md, MCP. Documentation must be precise about post-cutoff changes.

Six DX-to-AX Dimensions

Zeno Rocha (Resend)

  1. Onboarding - Millisecond activation; agents won't wait for manual reviews.
  2. Documentation - LLM-readable formats (llms.txt) for context windows.
  3. SDKs - Agents write their own; REST APIs and OpenAPI specs matter more.
  4. Audit Logs - Differentiate human vs. agent actions with precision.
  5. API Keys - Agents must create, delete, and rotate keys autonomously.
  6. RBAC - Granular task-specific permissions; high-risk actions need human confirmation.

Implementation Checklist

agentexperience.ax

  1. Identify where users want agents to act.
  2. Assess whether APIs are documented and machine-readable.
  3. Optimize documentation for AI (OpenAPI specs, structured metadata).
  4. Simplify access controls (token-based auth, role-based access for agents).
  5. Use agents to test your own product.

Standards

Content Discovery

  • llms.txt - Curated Markdown index of a site's most valuable content for LLMs. Created by Jeremy Howard (Answer.AI). ~844k sites adopted.
  • llms-full.txt - Companion to llms.txt with full documentation text in one file. Agents visit it 2x more often than llms.txt.
  • SKILL.md - Agent capability descriptions with YAML frontmatter and progressive disclosure. Originated from OpenClaw/Moltbook, formalized by Anthropic.
  • AGENTS.md - Project-level instructions for coding agents (build commands, architecture, conventions). Created by OpenAI, now part of the Agentic AI Foundation. 60k+ repos.
  • HEARTBEAT.md - Periodic task checklist for autonomous agent check-ins. OpenClaw ecosystem.

Communication Protocols

  • MCP - Model Context Protocol. Agent-to-tool connections. Often called "USB-C for AI." Created by Anthropic (2024), now under the Agentic AI Foundation. 13k+ servers on GitHub.
  • A2A - Agent-to-Agent Protocol. Peer-to-peer communication between independently built agents. Created by Google (2025), now under Linux Foundation. 150+ partner organizations.
  • NLWeb - Natural Language Web. Adds conversational /ask and /mcp endpoints to websites using Schema.org data. Created by R.V. Guha (creator of Schema.org) at Microsoft.
  • Agent Protocol - Framework-agnostic REST API for communicating with any agent. Tasks, steps, and artifacts. AI Engineer Foundation.
  • ACP - Agent Communication Protocol. Lightweight HTTP-based agent messaging. IBM BeeAI.
  • ANP - Agent Network Protocol. Decentralized agent networking with W3C DID identity and end-to-end encryption.
  • AG-UI - Agent-User Interaction Protocol. Standardizes how agents interact with end users.
  • A2UI - Agent to UI Protocol. Enables AI agents to generate rich, interactive user interfaces using declarative JSON messages.
  • UCP - Universal Commerce Protocol. Open standard co-developed by Google and Shopify enabling AI agents to connect and transact with merchants. Covers discovery, cart assembly, checkout, and post-purchase support.

Discovery Mechanisms

Well-known URIs (RFC 8615) for agent discovery:

  • /.well-known/agent.json - A2A Agent Card (identity, capabilities, auth).
  • /.well-known/agents.json - API contracts optimized for agent consumption.
  • /.well-known/skills/index.json - Agent skill discovery index (Cloudflare RFC).
  • /llms.txt - Content index for LLMs.
  • /llms-full.txt - Full content for LLMs.

IETF Drafts:

  • HTTP-Based AI Agent Discovery and Invocation Protocol - IETF draft for standardized agent discovery and invocation over HTTP. Published October 2025.
  • Agent Directory Service - IETF draft for distributed directory service to store AI agent metadata and enable discovery.
  • BANDAID - Brokered Agent Network for DNS AI Discovery. Uses DNS with SVCB records for scalable agent discovery. Published October 2025.
  • DNS-Native AI Agent Naming and Resolution - DNS-native mechanism for agent naming using FQDNs and SVCB records. Published December 2025.
  • AgentDNS - Root domain naming and service discovery system for LLM agents. Published October 2025.
  • Agent Registration and Discovery Protocol (ARDP) - Transport-agnostic IETF draft for stable agent identity, dynamic endpoint resolution, and capability advertisement across MCP, A2A, HTTP, and gRPC.
  • ACIP Framework - IETF draft proposing Agent Communications Internet Protocol, an HTTP-proxy-style infrastructure layer for routing, access control, and policy enforcement between distributed AI agents and MCP Gateways. Futurewei Technologies, March 2026.
  • NANDA - MIT Media Lab initiative building decentralized "DNS for agents" infrastructure with AgentFacts schema for verifiable capability attestation, sub-second global resolution, and cross-protocol interoperability across MCP, A2A, and NLWeb.

Access Control

  • IETF robots.txt Update - Adds intent-based policies (training vs. indexing vs. inference), API endpoint discovery, and cryptographic verification.
  • Really Simple Licensing (RSL) - AI bot licensing terms embedded in robots.txt. Adopted by Medium, Reddit, Yahoo.
  • ai.txt - UK publisher proposal for AI bot permissions (policy-level, not a technical spec).
  • AI Agent Authentication and Authorization - IETF draft demonstrating how existing WIMSE and OAuth 2.0 standards can be composed for AI agent identity, authentication, and authorization without new protocols. Authors from AWS, Zscaler, OpenAI, and Ping Identity. March 2026.

API Description

  • agents.json (Wildcard AI) - Extends OpenAPI with flows and links optimized for agent consumption.
  • agents.json (jmilinovich) - Agent permissions and interaction rules, analogous to robots.txt for agents.
  • JSON Agents / PAM - Portable Agent Manifest. Universal JSON format for describing agent capabilities, tools, security, and orchestration.

Governance

Tools

Agent-Readable Content

  • Firecrawl - Web data API that turns websites into LLM-ready markdown.
  • Crawl4AI - Open-source LLM-friendly web crawler.
  • llms-txt - Official llms.txt specification, CLI tools, and Python library.
  • llms-txt-hub - Largest curated directory of llms.txt implementations.
  • llmstxt-generator - Generates llms.txt files by crawling a website.
  • llms-txt-generator (aircode) - AI-powered llms.txt generator with MCP integration.

Agent Discovery & Registration

  • A2A - Google's Agent-to-Agent protocol reference implementation.
  • Agent Network Protocol - Decentralized agent networking with W3C DID-based identity.
  • Agent Cards - Verifiable identity and capability declarations for autonomous agents.
  • AGNTCY - Open-source infrastructure for inter-agent collaboration.
  • OpenAgents - AI agent network infrastructure with MCP and AsyncAPI support.
  • awesome-a2a - Community-maintained curated list of A2A agents, tools, servers, and clients.

Agent-Friendly APIs

  • NLWeb - Natural language endpoints for websites, built on Schema.org. Every instance is also an MCP server.
  • wpnlweb - WordPress plugin implementing the NLWeb protocol.
  • Manufact - Open-source SDK and platform for building, deploying, and managing MCP servers and AI agents. Y Combinator-backed with 8k+ GitHub stars.

Agent Web Interaction

  • browser-use - Makes websites accessible for AI agents via browser automation.
  • Stagehand - SDK for AI browser automation with built-in fail-safes.
  • agent-browser - Browser automation CLI for AI agents by Vercel.
  • Notte - Full-stack framework for building web agents.
  • Steel Browser - Open-source browser API designed for AI agents.
  • Web Agent Protocol - Standardized framework for recording and replaying browser interactions.
  • TheAgenticBrowser - Open-source AI agent for web automation and scraping.
  • mcp-browser-agent - MCP integration providing Claude Desktop with autonomous browser automation capabilities including DOM manipulation and JavaScript execution.
  • Fuji - AI agent that lives in browser sidepanel for getting tasks done online with a single command.
  • Browser Operator - AI browser with built-in multi-agent platform, open-source alternative to ChatGPT Atlas and Perplexity Comet.
  • Skyvern - Automates browser-based workflows using LLMs and computer vision; top-ranked on the WebVoyager benchmark with 20k+ GitHub stars.
  • Lumen (browser-agent) - Vision-first open-source browser agent using a screenshot→model→action loop over CDP with self-healing deterministic replay and zero-token action caching; supports Anthropic, Google, and OpenAI providers.

MCP Ecosystem

  • MCP Servers (official) - Reference server implementations by Anthropic.
  • GitHub MCP Server - GitHub's official MCP server in Go.
  • awesome-mcp-servers (punkpeye) - Curated list of MCP servers.
  • awesome-mcp-servers (wong2) - Another curated list of MCP servers.
  • crawl4ai-mcp-server - Web scraping exposed as MCP tools.
  • AWS MCP Servers (awslabs/mcp) - Official suite of MCP servers for AWS giving AI applications access to AWS APIs, documentation, pricing, and contextual guidance.
  • playwright-mcp - Microsoft's official MCP server for browser automation via Playwright's accessibility tree, enabling deterministic AI web interaction.
  • MCP Apps - Official MCP protocol extension enabling tools to return interactive UI components (dashboards, forms, visualizations) rendered inside AI chat clients.
  • microsoft/mcp-gateway - Kubernetes-native MCP reverse proxy providing session-aware stateful routing, OAuth 2.0 with Entra ID, and RBAC for managing MCP server deployments at scale.

Skills & Instructions

  • AGENTS.md - Open format for giving coding agents project-specific instructions. 60k+ repos.
  • ClawHub - Public skill registry for OpenClaw agents.
  • awesome-openclaw-skills - Curated collection of OpenClaw skills.
  • agent-trace - Standard format for tracing AI-generated code provenance.
  • microsoft/skills - Skills, MCP servers, and AGENTS.md templates for grounding AI coding agents with Azure SDK and Microsoft AI Foundry knowledge. 131 skills across 6 languages.
  • awesome-agent-skills - Comprehensive guide to building and using Agent Skills with learning phases, platforms, and implementation resources.

GEO & Agent SEO

  • GEO - Research framework for Generative Engine Optimization from Princeton.
  • GetCito - Open-source AI search optimization tool.
  • Gego - Open-source GEO tracker across multiple LLMs.
  • awesome-GEO - Curated list of GEO resources and tools.
  • GEO Tools List - Extensive list of commercial and free GEO tools.
  • Profound - Market-leading Generative Engine Optimization tracking platform, named G2's Winter 2026 AEO category Leader.
  • Goodie AI - Comprehensive GEO platform tracking brand visibility across ChatGPT, Gemini, Perplexity, Claude, Copilot, and DeepSeek with optimization guidance.
  • Birdeye Search AI - Tracks and improves how brands and locations appear across AI-powered discovery engines like ChatGPT, Google Gemini, and Perplexity.
  • Geoptie - Entry-level GEO tool with accessible $49/mo pricing and 14-day free trial for beginners.
  • Otterly.AI - Democratizes GEO monitoring with entry-level tier at $25/month for tracking AI search visibility.
  • Peec AI - GEO optimization platform with pricing ranging from €89/mo starter to €499/mo enterprise tiers.
  • AutoGEO - ICLR 2026 framework that uses reinforcement learning (GRPO) to automatically learn generative engine preferences and rewrite web content for improved AI search citation rates; claims up to 50% improvement in generative search visibility.

Benchmarking & Testing

  • AI Agent Benchmark Compendium - Directory of 50+ agent benchmarks.
  • TheAgentCompany - 175-task benchmark in a simulated software company environment.
  • best-of-mcp-servers - Ranked list of MCP servers, updated weekly.
  • Terminal-Bench 2.0 - 89-task hard benchmark for AI agents on real-world terminal tasks, with the Harbor framework for containerized evaluation environments; frontier agents score below 65%. Laude Institute.
  • FeatureBench - ICLR 2026 benchmark of 200 complex feature-development tasks across 24 OSS repos; top agents achieve only 11% vs 74% on SWE-bench, exposing a gap in real-world feature implementation.
  • agentevals - LangChain's trajectory evaluators for agents using path comparison and LLM-as-a-Judge scoring; supports Python and JavaScript.
  • τ-Bench - Benchmark for evaluating AI agents in tool-agent-user interaction across retail, airline, telecom, and banking domains; includes τ-Voice for full-duplex real-time audio evaluation with major LLM providers.
  • ITBench - IBM Research open-source benchmark for IT automation agents covering SRE incident response, CISO compliance assessment, and FinOps cost anomaly use cases with a public leaderboard.

Articles & Talks

Foundational

Company Perspectives

Thought Leadership

VC & Analyst Takes

  • a16z "Big Ideas 2026" - "We're no longer designing for humans, but for agents." Proposed dual-mode interfaces.
  • Sequoia Capital - "MCP may become as foundational as TCP/IP." Agent economy requires persistent identity and communication protocols.
  • Bessemer Venture Partners - Named AX as "Law #1" in AI Developer Laws. Created the AI Agent Autonomy Scale.
  • Forrester - Five critical AX skills: knowledge curation, change management, critical thinking, interaction skills, agent oversight.
  • McKinsey - Up to $1T in US retail, $3-5T globally by 2030. "If your catalog is not machine-readable, agents will not find you."
  • BCG - AI traffic to retail up 4,700% YoY. "Those who wait risk becoming invisible."
  • AI Agent Trends 2026 - Google Cloud report identifying five enterprise shifts: instruction-based to intent-based computing, single tasks to multi-agent systems, generic to grounded models, democratized development, and evolving human roles. 52% of gen AI enterprises already have agents in production. Google Cloud, 2026.
  • Agentic AI Strategy - Deloitte Tech Trends 2026 chapter: 23% of companies using agentic AI today rising to 74% in two years; legacy system integration is the top production obstacle. Deloitte Insights, Dec 2025.
  • Prepare Your Workforce for an Agentic Future with an Agent Experience Program - Forrester defines an AX program as five workforce skills (knowledge curation, change management, critical thinking, interaction skills, agent oversight); reports $5 in services for every $1 in agent licensing. Craig Le Clair et al., Forrester, Nov 2025.

Case Studies

Agentic Commerce

  • Stripe - Co-developed Agentic Commerce Protocol (ACP) with OpenAI. Created Shared Payment Tokens (SPTs) as a new payment primitive. Hosts remote MCP server. All docs available as markdown.
  • Shopify - Co-developed Universal Commerce Protocol (UCP) with Google. "Every store agent-ready by default." AI traffic surged 7x, orders 11x. Key lesson: data quality is the differentiator.
  • Walmart - "Super Agent" architecture with three personas sharing a single MCP data plane. Cut out-of-stock events by 30% in pilot stores. Partnership with Google Gemini announced Jan 2026.
  • Michael Kors - Shopping Muse semantic styling agent. 15-20% conversion rate improvement over keyword search.
  • Estée Lauder - Jo Malone London AI Scent Advisor recreates in-store consultation digitally using Vertex AI and Gemini. 2026.
  • Google/Shopify - Co-developed Universal Commerce Protocol (UCP) enabling AI agents to transact with merchants. Partners include Etsy, Wayfair, Target, Walmart, Best Buy, and Macy's. Native shopping rolling out in Google Search AI Mode and Gemini app. Jan 2026.
  • Ralph Lauren - Ask Ralph AI-powered virtual shopping tool creates shoppable outfit combinations personalized to user prompts from Polo collections. Sep 2025.
  • URBN (Anthropologie, Free People, Urban Outfitters) - Started small with popular categories like dresses and denim, standardizing language and taxonomy for highest impact. 2026.
  • Ulta Beauty - Strategy focuses on exclusive products and "Only at Ulta" offerings as competitive advantage in agentic AI era. 2026.
  • Mastercard - Launched Agent Pay, agentic payment infrastructure using Agentic Tokens enabling AI agents to transact securely on behalf of users with full consumer consent and auditability. Integrated with Microsoft Copilot Checkout, OpenAI Instant Checkout, PayPal, Google UCP, and Fiserv. First authenticated agentic transactions completed in Australia, 2026.
  • Amazon - Opened Buy for Me and Shop Direct to 400K+ merchants via catalog integrations (Feedonomics, Salsify, CEDCommerce); 100M+ products agent-purchasable within the Amazon Shopping app. Mar 2026.
  • Visa - Launched Intelligent Commerce platform and open Trusted Agent Protocol for cryptographic AI agent authentication versus malicious bots; 100+ global partners in sandbox. 2026.
  • OpenAI - Reversed Instant Checkout in-app purchasing after onboarding and tax-collection challenges; pivoted to retailer-app model inside ChatGPT where purchase completes on retailer's own site, giving brands full control of transaction experience. Mar 2026.
  • Firmly - Launched Firmly Connect, a no-code agentic commerce onboarding platform; retailers including Best Buy and Backcountry integrated with zero engineering resources. Mar 2026.
  • Accenture / DaVinci Commerce - Accenture Ventures invested in DaVinci Commerce on March 23, 2026 to advance the Agentic BrandStore product, which surfaces branded experiences inside LLMs; partnership with Accenture Song covers discovery through fulfilment and loyalty. Mar 2026.

Platform AX

  • Netlify - Shifted North Star from DX to AX. Anonymous deploy flows, MCP server, context files. Result: 10M developers, 5x daily signups, 7x paid conversions, ~10k AI-generated sites/day.
  • Daytona - Built agent-native development infrastructure. $1M ARR in 8 weeks.
  • Cloudflare - First toolkit to securely connect SaaS to Claude via MCP. Published agent-skills-discovery RFC. MCP server deployment reduced from weeks to days.
  • Linear - Enabled @ mentioning AI agents (Devin, Codegen) directly from tickets. Bidirectional agent-human product interaction.
  • Home Depot - Magic Apron AI companion provides specialized customer support with access to customer and purchase data for personalized assistance. 2026.
  • Microsoft - Launched agentic AI solutions for retail including Copilot Checkout (sell within Copilot), Brand Agents for Shopify merchants, personalized shopping agent template, and store operations agent template. Dynamics 365 Commerce MCP Server in preview. Jan 2026.
  • AWS - Launched AgentCore Gateway, a fully managed MCP server converting existing APIs and Lambda functions into agent-callable tools with 1-click integrations for Salesforce, Slack, Jira, and Zendesk; available across 14 AWS regions. Feb 2026.

Academic Papers

Related Awesome Lists

Research Notes

Detailed research notes compiled during the creation of this repository:

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