- Building AI Agents
- Posts
- Mastercard unveils Agent Pay
Mastercard unveils Agent Pay
Plus: 44 open-source tools for agent developers, the birth of the Frontier Firm, and more
Michael Cunningham
May 01, 2025
Welcome back to Building AI Agents, your biweekly guide to everything new in the field of agentic AI!
Wow your Agent is powered by a massive LLM? Have you tried chucking it into a big regex parser and decision trees first, they're really fast and reliable.
— Bryan (@bryancsk)
11:23 PM • Apr 26, 2025
LLMs are great for extracting complex meaning from texts. But if you’re asking them to “find all the places this mentions cats,” there are much easier ways to do that.
In today’s issue…
Mastercard ushers in the agent economy
44 open-source solutions for agent developers
261 AI business transformation case studies by Microsoft
2025: The year the Frontier Firm is born
…and more
🔥 IN CASE YOU MISSED IT
Readers’ favorite items from the past week
📅 AGENT OF THE WEEK
Lead Re-Engagement Agent
Client: Built for busy agencies and consultants tired of chasing cold leads.
Problem: Agencies waste hours digging through CRM graveyards—full of fizzled conversations and unanswered messages.
Solution: We built Ember—an agent that rekindles cold leads.
Revives cold leads
Sends smart follow-ups
Flags re-engaged prospects
If agents like this would save your business time and money, set up a free 30 minute strategy call with Building AI Agents’ official agency, Orynt AI!