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Not sure where to start? This week’s hottest software, models and stacks in three minutes.

AI Apps▾

AI software people use: from assistants like ChatGPT to tools for coding, video and workflows, picked by purpose.

For Agents▾

Software for AI: tools that let your agent (Claude Code, Codex, Cursor…) browse, read docs, run code and remember.

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// Follow protocols & specs

ucp

Universal Commerce Protocol specification.

Open source Maintained For agents

Official site ↗ GitHub ↗

IN ONE PARAGRAPH

ucp is universal Commerce Protocol specification.

Good for: Developers who want their agent (Claude Code, Codex, Cursor…) to follow protocols & specs.

Not for: people who don’t want to install and run tools themselves.

01How to start

  1. 1Read the official README for requirements and permissions.
  2. 2Install it as the official guide describes.
  3. 3Tell your agent the command exists (e.g. in AGENTS.md / CLAUDE.md) so it knows when to call it.

02Alternatives & comparison

Compare side by side →
A2A Agent2Agent (A2A) is an open protocol enabling communication and interoperability between opaque agentic applications. ★ 26k agents.md AGENTS.md — a simple, open format for guiding coding agents ★ 25k modelcontextprotocol Specification and documentation for the Model Context Protocol ★ 9.5k agent-client-protocol A protocol for connecting any editor to any agent ★ 4.4k llms-txt The /llms.txt file, helping language models use your website ★ 2.7k

03Related

Versions, why it is listed, for AI to read

Popularity evidence (third-party snapshots)

For AI agents

Data updated: AI software & hot ranks · Software profiles & needs(UTC+8)