AI Agents Standards Map
Communication and Messaging
MCP - Open standard from Anthropic for securely connecting AI models to external data, tools, and workflows using JSON-RPC 2.0.
A2A - Open standard for interaction between independent agents with capability discovery and task delegation.
Agent Protocol - Technology-agnostic API interface for managing agent task lifecycle, steps, and artifact management.
ACP - RESTful protocol from Linux Foundation (now part of A2A) for agent compatibility with asynchronous messaging and streaming responses.
ANP - Decentralized P2P protocol for Agent Web using W3C DID for identification and secure interaction.
OASF - Standardized schemas for defining agent capabilities, interactions, and metadata.
Agora - Meta-protocol for dynamic negotiation of communication rules between heterogeneous agents.
LangChain/LangGraph Agent Protocol - Framework-independent interface for managing runs, threads, and memory stores.
HAIDIP - IETF Internet-Draft for AI agent discovery and invocation via HTTP with Agent Card metadata.
AOP - Distributed environment for large-scale agent collaboration with DNS-like registry.
LMOS Protocol - Framework for adaptive, secure Agent Internet with flexible transport layers.
Economy and Transactions
Agentic Commerce Protocol - Joint standard from OpenAI and Stripe for payments, product feeds, and order fulfillment through agents.
KYAPay Protocol - Open protocol for financial transactions conducted by autonomous agents.
Discovery, Manifests and Metadata
AGENTS.md - Open Markdown format for instructions on building, testing, and code conventions for AI agents.
Agent Skills - Anthropic specification for packaging agent skills as folders with instructions, scripts, and resources.
agents.json - OpenAPI-based manifest for describing website-agent interaction contracts.
GPT Actions - ChatGPT plugin manifest specification describing API and metadata.
ANP Agent Discovery - ANP sub-protocol for discovery using JSON-LD with active and passive mechanisms.
Oracle Agent Spec - Specification for integrating oracle-agents with AG-UI ecosystems.
Skills, Tools and Data Schemas
Chat Completion API - Most widespread API for models and de facto industry standard for using chat-oriented LLMs.
Microsoft Declarative Agent Manifest - Schema for Microsoft 365 Copilot agents with instructions, knowledge sources, and actions.
User Interfaces
A2UI - Declarative JSON protocol for generating interactive interfaces that render in web, mobile, or desktop applications.
AG-UI Protocol - Agent-user interaction protocol with real-time state synchronization and process visibility.
ChatGPT Apps - MCP-based specification for creating interactive widgets and applications within ChatGPT.