Postman at APIdays Amsterdam: Building Better APIs for the AI Era

APIdays Amsterdam brought together API practitioners, architects, platform teams, and AI innovators from across Europe to explore the future of APIs for Agents and intelligent systems. As a Gold Sponsor, Postman was excited to contribute through workshops, technical talks, hands-on demos, and countless conversations with developers looking to build the next generation of AI-powered applications.

A Hands-On Workshop Exploring APIs with Artemis II

The week kicked off with a hands-on workshop led by Pooja Mistry, Senior Developer Advocate, Enterprise Adoption at Postman.

Using the Artemis II API, an API inspired by planning a lunar mission around the moon—participants explored how teams can get started with Postman and build effective API workflows. Throughout the session, attendees learned how to work with API collections, environments, and the Collection Runner while gaining hands on experience working with Git-native API workflows, AI-powered testing, and MCP agent integration in Postman.

Pooja also showcased Agent Mode, demonstrating how AI-powered workflows can help developers move faster while working with APIs.

The workshop was packed from start to finish, with attendees actively participating as they launched rockets, planned lunar missions, and explored Postman’s platform through a realistic API experience.

Practical Steps to Making Your APIs Ready for AI Agents

One of the highlights of the event was a presentation by Gbadebo Bello, Senior Developer Advocate at Postman, titled “Practical Steps to Making Your API Ready for AI Agents.”

As AI agents become increasingly responsible for discovering, understanding, and interacting with APIs, the quality of an API’s design has a direct impact on agent performance, reliability, and cost.

The session outlined seven actionable steps teams can take today to make their APIs more agent-friendly.

To bring these concepts to life, Gbadebo delivered a live demonstration comparing two OpenAPI specifications: one intentionally designed with poor API design practices and another designed with AI readiness in mind.

After generating collections from both specifications, he used Postman’s MCP Server Generator to create MCP servers for each API and explored the resulting implementations. Attendees were able to see how Postman’s MCP Client makes it easier to navigate and understand API schemas through a visual interface rather than manually working through large volumes of schema definitions.

The demo culminated with connecting both MCP servers to Goose, an AI agent, and asking a simple task: create a bank account.

The results were striking. The agent connected to the AI-ready API completed the task in a single attempt while consuming significantly fewer tokens, less time, and lower cost. The agent connected to the poorly designed API required multiple turns, consumed substantially more tokens, and incurred higher costs before arriving at the same outcome.

The demonstration highlighted an increasingly important reality for API teams: the design decisions made today directly impact how effectively AI agents can use APIs tomorrow.

The session also covered API discoverability, security considerations, error design, and emerging API security risks, including examples from Postmark’s MCP server which was the first vulnerable MCP server in the world.

Bringing the Conversation to the Booth

Beyond the stage, the Postman booth became a hub for conversations about APIs, AI agents, MCP, and modern developer workflows.

Visitors were able to experience a series of live demonstrations throughout the event, including:

• Postman’s new Native Git capabilities

• AI-powered workflows and Agent Mode in Postman

• MCP-related workflows and agent development experiences

• Interactive walkthroughs of Astro AI

One thing that made the booth stand out was our silent-demo setup. Using wireless noise-canceling headsets, attendees could fully immerse themselves in live demonstrations despite the busy exhibition hall around them. While presenters spoke through microphones, participants heard only the demo audio and commentary, creating a surprisingly focused learning experience in the middle of a bustling conference floor.

Exploring Agent Experiences with Astro AI

The booth also featured the Astro AI team, who introduced attendees to Astro AI through an interactive Minecraft-based experience.

Led by Simon Guerrier, the demo allowed participants to deploy and interact with AI agents represented as Minecraft characters. The experience provided a fun and engaging way to explore agent behavior, orchestration, and real-world AI interactions while sparking conversations about the future of intelligent systems.

Thank You, Amsterdam

Events like APIdays Amsterdam remind us why the API community continues to be one of the most innovative and collaborative communities in technology.

From packed workshops and live demos to thoughtful conversations about AI agents, MCP, API security, and developer productivity, we had an incredible week connecting with developers and sharing what we’re building at Postman.

A huge thank you to everyone who attended our sessions, stopped by the booth, tried a demo, asked questions, and shared their ideas with us.

A special shout out to Patricia Dugan and Jelle Van De Velde for helping make our presence at APIdays Amsterdam such a success. Patricia played a huge role in organising and bringing everything together, while Jelle had so many insightful conversations with users and helped answer their questions throughout the event amongst other things. This was definitely a team effort!

We’re excited about the future of APIs and AI—and we’re even more excited to continue building it together with this community.

L – R => Patricia Dugan, Gbadebo Bello, Pooja Mistry, Jelle Van De Velde, Simon Guerrier