APIs let you get at fascinating and useful treasure troves of data. Here’s a look at the wide world of APIs for finding and manipulating data in your applications.
   
    
 
 
  
   
   This article compares Model Context Protocol (MCP), Function Calling, and OpenAPI Tools for integrating tools and resources with language models, outlining their strengths, limits, security considerations, and ideal use cases.
   
    
 
 
  
   
   The Model Context Protocol (MCP) is a new open protocol that allows AI models to interact with external systems in a standardized, extensible way. In this tutorial, you’ll install MCP, explore its client-server architecture, and work with its core concepts: prompts, resources, and tools.
   
    
 
 
  
   
   Fly.io provides a secure and fast platform for deploying AI workflows and LLM-generated code using ephemeral, kernel-isolated virtual machines (Fly Machines). It offers features like secure sandboxing, fast startup times, a clean slate for each run, a simple API, and support for whole applications, not just code snippets.
   
    
 
 
  
   
   Interact with opencode server over HTTP. The `opencode serve` command runs a headless HTTP server that exposes an OpenAPI endpoint that an opencode client can use.
   
    
 
 
  
   
   An overview of popular techniques to confine LLMs' output to a predefined schema, covering API providers, prompting/reprompting strategies, and constrained decoding.
   
    
 
 
  
   
   This document details the features, best practices, and migration guidance for GPT-5, OpenAI's most intelligent model. It covers new API features like minimal reasoning effort, verbosity control, custom tools, and allowed tools, along with prompting guidance and migration strategies from older models and APIs.
   
    
 
 
  
   
   This article discusses how GitHub Models provides a free, OpenAI-compatible inference API to make AI-powered open source software more accessible. It details the challenges of AI inference (cost, local resources, distribution) and how GitHub Models addresses them, including setup, CI/CD integration, and scaling.
   
    
 
 
  
   
   The Universal Tool Calling Protocol (UTCP) is an open standard that describes how to call existing tools directly, eliminating the need for wrappers. It focuses on direct communication with tool endpoints (HTTP, gRPC, WebSocket, CLI, etc.) to reduce latency and maintain existing security and billing systems.
   
    
 
 
  
   
   QSL World offers an AI-powered tool to visualize ham radio contacts by uploading ADIF files and generating an interactive map. The tool integrates with QRZ.com for accurate data and allows users to select QSL card designs for confirmations.