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The API Changelog

Bruno Pedro, Vania Coelho

Curated API moves. Unfiltered expert takes.

Platform
Substack
PricingOnly free issuesPublishesTwice weekly
Issues278Founded7 years agoLast Issue14 hours ago
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Latest Issues

Why AI Agents Don't Need Your Full API

The easiest thing you can do is make your entire API available to AI agents. However, "by presenting the LLM with fewer, more relevant tools, we reduce confusion, allowing the model to focus better and achieve higher accuracy"1. You see, di...

14 hours ago

Designing APIs for the Input-Required World

Agentic workflows don't work well with APIs. Web APIs are stateless by nature. A consumer makes a request, the API processes it, and returns a final response. The next request will be totally new. Unfortunately for the consumers, API server...

15 days ago

No One Understands What Your API Does

The day you were longing for finally arrived. You deployed the first version of your API. Being able to see the result of months of hard labor feels gratifying. Your API is up and running. No errors. So you and your team go out to celebrate...

24 days ago
1

The Most Important Step in the API Lifecycle

I learned the hard way how to design useless APIs. I still remember how I would spend most of the time making sure that my API was mapping the underlying data model. Or, how I would obsess over the details of the API definition. Fortunately...

a month ago

An A2A Survival Guide for API Owners

Designing APIs for humans leads nowhere. What we once considered a best practice is now obsolete. Yes, human developers are good at understanding sometimes ambiguous API documentation. They can write code that handles errors gracefully and...

2 months ago
1

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  • Bruno Pedro

    Author of "Building an API Product."

  • Vania Coelho

    Editor of the API Changelog

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