







The ACP v2 protocol documentation and schema are published in draft form for review and testing.
RAIT-09/obsidian-agent-client
Bring AI agents into Obsidian via Agent Client Protocol (ACP), such as Claude Code, Codex and Gemini CLI.
Agent Protocols — MCP, A2A, A2UI, AG-UI
It feels like every other month, there is a new agent protocol and it’s getting hard to keep track of which protocol is used when…

Introduction - Agent Client Protocol
Get started with the Agent Client Protocol.

Google launches new protocol for agent-driven purchases | TechCrunch
Called the Agent Payments Protocol (AP2), the system is meant to be interoperable between AI platforms, payment systems, and vendors.

evalstate/fast-agent
Code, Build and Evaluate agents - excellent Model and Skills/MCP/ACP Support
a2aproject/A2A
Agent2Agent (A2A) is an open protocol enabling communication and interoperability between opaque agentic applications.
Protocol Reader - Summer of Protocols
The Protocol Reader The Protocol Reader is an 358-page book (currently only available as an epub) comprising 26 foundational essays by 31 authors from the Summer of Protocols program, carefully edited and sequenced to introduce you to the fascinating new discipline of Protocol Studies. It can serve as

Alex Albert on Twitter / X
We just published a near-term development roadmap for the model context protocol (MCP)Some highlights:- Remote support (and auth!)- Reference implementations- Better package management- Agent support pic.twitter.com/SflJi1RapH— Alex Albert (@alexalbert__) January 2, 2025
AP2/docs/ap2/specification.md at main · google-agentic-commerce/AP2
Building a Secure and Interoperable Future for AI-Driven Payments. - google-agentic-commerce/AP2
Autonomous Communicator (AC) Protocol — Germ Network
“Hi, I’m Mark, here’s how you can send a message to me.” Our Autonomous Communicator (AC) Protocol empowers people to autonomously define identities which they can exchange with others to form relationships for communicating over end-to-end encrypted (E2EE) messaging channels.

New capabilities for building agents on the Anthropic API | Claude
Claude now offers code execution, MCP server connections, file storage, and extended prompt caching through the API—giving developers powerful tools to build agents that analyze data, connect to external systems, and maintain context for longer periods of time.

Building AIP: An ATProtocol Authorization Gateway - Nick's Blog
OAuth is the first challenge developers face in the atmosphere. This post is about AIP, the authorization gateway we built at Graze Social to alleviate some of the pain.
Piecing together the Agent puzzle: MCP, authentication & authorization, and Durable Objects free tier
Cloudflare delivers the toolkit for AI agents with new Agents SDK support for MCP (Model Context Protocol) clients, authentication/authorization/hibernation for MCP servers, and Durable Objects free tier.

Wrote about why the AT Protocol is the ultimate API for you and your agents! davidgasquez.com/atproto-agents We need more people building on the atmosphere!