OpenAI launches AgentKit (and a lot more)

Edition 126 | October 9, 2025

This looks suspiciously like my high school report cards.

Welcome back to Building AI Agents, your biweekly guide to everything new in the field of agentic AI!

In today’s issue…

• The biggest launches from OpenAI’s DevDay

• Harvard’s 600 tools for AI scientists

• The top 50 AI application companies

• An agent-first business playbook for CEOs

• Google’s new model for computer-controlling agents

…and more

🔥 IN CASE YOU MISSED IT

Readers’ favorite items from the past week

1. 28 AI tools that should exist but don’t

2. How to deploy agents in real businesses

3. AI agents for public relations

4. OpenAI’s new Agentic Commerce Protocol

5. MCP support is coming to Apple products

 🤖 AGENT OF THE WEEK

Welcome back to Agent of the Week:

The past few weeks, I’ve been testing MCP servers, and they might be the biggest upgrade to agents I’ve seen.

Normally, an agent needs 15+ tools to pull data, summarize, and send info.
Now? One MCP server can connect to everything in a single step — saving hours of setup time.

So to test this, I built a Calendar Assistant Agent — it connects to Google Calendar and Gmail through Rube MCP, then emails me a clean summary of my upcoming week.
Just one agent with full access to Gmail & Google Calendar. Simple, but seriously powerful for 1 tool.

How it works

1. Open n8n: Create a new workflow (free plan is enough)

2. Add a Chat node: This is how you talk to the agent

3. Add an AI Agent node: Pick your model (GPT, Claude, etc) and set the agent prompt

4. Add an MCP node: Point to any MCP provider (Rube, Composio, or self-host). I’ve used Rube, free to test with high limits - this is not an AD

5. Connect apps via MCP: Authorize Google Calendar (read) and Gmail (send, read, draft, etc)

6. Run it: “Get next week’s events, summarize by day, and email me a recap of what’s happening next week” or “Cancel all my meetings for Monday and email the scheduler that I am out of office that day”

7. (Optional) Schedule: Trigger every Sunday 10am and add Slack if you want

Bonus: Want the detailed video walkthrough and the exact n8n agent template? Get access to both in our Building AI Agents Community here!

Till next week,
AP

P.S. What agent could you use? Reply with your idea and I’ll build it next week 👀