---
title: "Discussion on \"JSON vs Programmatic Tool Calling with Claude\" | Hashnode"
description: "Discussion on \"JSON vs Programmatic Tool Calling with Claude\". When building an application with the Claude API, connecting tools is the first step toward a functional agent. The model can call functions, query databases, send messages. But how you wire those too"
url: "https://hashnode.com/posts/json-vs-programmatic-tool-calling-with-claude/6aa439fc73a97501cdf58702"
---

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# [JSON vs Programmatic Tool Calling with Claude](https://thomastartrau.hashnode.dev/json-vs-programmatic-tool-calling-with-claude?utm_source=hashnode&utm_medium=feed)

When building an application with the Claude API, connecting tools is the first step toward a functional agent. The model can call functions, query databases, send messages. But how you wire those too

Sep 11 · 8 min read · thomastartrau.hashnode.dev  
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-   [#claude-code](https://hashnode.com/tag/claude-code)
-   [#ai](https://hashnode.com/tag/ai)
-   [#typescript](https://hashnode.com/tag/typescript)
-   [#tutorial](https://hashnode.com/tag/tutorial)

## Written by

[Thomas Tartrau](https://hashnode.com/@thomastartrau)

@thomastartrau · Paris, France

  
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