A Bootiful Podcast: Glenn Renfro on Java and Spring community legend and my friend - on Devnexus and more

Hi, Spring fans! In this installment I talk to the amazing Glenn Renfro about Spring Batch, Spring Integration, Spring AI, and much more — plus why you should definitely register to attend the amazing Devnexus event in Atlanta, GA!...

This Week in Spring - February 3rd, 2026

Hi, Spring fans! This week I'm in northern Europe. I went on the Vaadin cruise from Finland to Sweden, gave a talk on a boat, then arrived in Stockholm in time for the amazing JFokus 2026 event where I had the privilege yesterday of doing a deep dive with my pal James Ward on Spring AI and agenti...

Spring AI Agentic Patterns (Part 5): Building Interoperable Agents with the Agent2Agent (A2A) Protocol

The Agent2Agent A2A Protocol is an open standard for seamless AI agent communication. It enables agents to discover capabilities, exchange messages, and coordinate workflows across platforms—regardless of their implementation. Spring AI A2A integrates the A2A Java SDK with Spring AI through Sprin...

Anthropic Agent Skills Support in Spring AI

In this blog, we show how using Spring AI, we can integrate with Anthropic's Native Skills API for Cloud-Based Document Generation and Custom Skills. Spring AI adds support for Anthropic's Agent Skills — modular capabilities that let Claude generate actual files rather than text descriptions. Wit...

This Week in Spring - January 20th, 2026

Hi, Spring fans! Welcome to another installment of This Week in Spring! It's already the 20th of January and we are off on yet another rip roarin' adventure as we look at the week that has been... this week in Spring! even more good stuff from Spring AI team legend Christian Tsolov, this one on...

This Week in Spring - January 13th, 2026

Hi, Spring fans, and welcome to another installment of This Week in Spring! It's the 13th of January, 2026, and it's been quite the week indeed! Let's dive right into it! Nobody, and I mean nobody , asked. So I put together a video on how to use Spring WS to build SOAP-based services in 2026. Hey...

This Year in Spring – December 30th, 2025

Hi, Spring fans! Can you believe it? It's already the 30th of December! I celebrated Christmas with my family in Los Angeles, then we jumped on a flight headed for Southeast Asia to ring in the New Year with more friends and family. I'm sitting at a café in the sweltering city of Kuala Lumpur,...

This Week in Spring – December 16th, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring! And what a week it’s been! We’ve got around nine shopping days ’til Christmas, and the New Year is almost here! Things are moving so quickly and the Spring community is no exception! Let's dive into this week's wonderful...

This Week in Spring - December 9th, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring! I am in lovely New Jersey, the Garden State , as I write this and I spent most of the last week in New Orleans. It's been a busy week in the Spring community and beyond and so you know what that means? There's a ton of stuff ...

This Week in Spring - December 2nd, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring. By mistake, I inadvertently published older content in this installment, then tried to fix it and ended up re-publishing the same content. And, what's worse, I somehow ended up deleting the draft I had written for this...

Beyond JSON: Converting Spring AI Tool Response Formats to TOON, XML, CSV, YAML, ...

JSON is the go-to format for LLM tool responses, but recent discussions around alternative formats like TOON Token-Oriented Object Notation claim potential benefits in token efficiency and performance. While the debate continues—with critical analyses pointing to context-dependent results—the...

LLM Response Evaluation with Spring AI: Building LLM-as-a-Judge Using Recursive Advisors

The challenge of evaluating Large Language Model LLM outputs is critical for notoriously non-deterministic AI applications, especially as they move into production. Traditional metrics like ROUGE and BLEU fall short when assessing the nuanced, contextual responses that modern LLMs produce. Human...

Create Self-Improving AI Agents Using Spring AI Recursive Advisors

The Spring AI ChatClient offers a fluent API for communicating with an AI model. The fluent API provides methods for building the constituent parts of a prompt that gets passed to the AI model as input. Advisors are a key part of the fluent API that intercept, modify, and enhance AI-driven...

AWS Bedrock Prompt Caching Support in Spring AI

In our previous blog post about Anthropic prompt caching, we explored how prompt caching dramatically reduces API costs and latency by reusing previously processed prompt content. We introduced Spring AI's five strategic caching patterns for Anthropic Claude models and showed how they automatical...

Introducing Spring AI Agents and Spring AI Bench

I'd like to introduce two new projects that are part of the Spring AI Community GitHub organization: Spring AI Agents, and Spring AI Bench. These two projects focus on using agentic coding tools—tools you likely already have in your enterprise. In 2025 AI coding agents have matured to the point...

Prompt Caching Support in Spring AI with Anthropic Claude

Large language model API costs can accumulate quickly when applications repeatedly send the same prompt content. A typical scenario: you're building a document analyzer that includes a 3,000-token document in every request. Five questions about that document means processing 15,000 tokens of...

This Week in Spring - October 14th, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring! I'm in Boston and New York city and Bulgaria and Poland this week, but I'm still hyped about last week's amazing Devoxx Belgium event! There are a ton of videos to look at, and I'll include just some of them here. So, without...

This Week in Spring - October 7th, 2025

Hi, Spring fans! How're you doing this fantastic October afternoon? I'm on a train returning from Frankfurt, Germany, where I spoke at the Cloud Foundry Day Frankfurt event about how awesome it is to build an application with Spring Boot and Cloud Foundry. Yesterday I was in Antwerp, Belgium, and...

Securing MCP Servers with Spring AI

Model Context Protocol, or MCP for short, has taken over the AI world. If you've been following our blog, you've probably read the introduction to the topic, Connect Your AI to Everything: Spring AI's MCP Boot Starters. The security aspects of MCP have been evolving fast, and the latest version o...

This Week in Spring: September 30th, 2025

Hi, Spring fans! As I write this I am about to board a flight for Colorado for the amazing Dev2Next conference! I'll be in Antwerp, Beglium for the amazing Devoxx event next week, and I'll be speaking at the Amsterdam JUG with James Ward on the Thursday after that, too! If you're around, be sure ...