# 25k uses for the diagram tool on the GPT Store

> The UML diagram tool reached 25k uses on the GPT Store. I built it to stop dragging boxes in Lucidchart and I am open to handing it on.

- HTML page: https://antoineboucher.info/CV/blog/posts/gpt-store-diagram-tool/
- Language: en
- Translation (fr): https://antoineboucher.info/CV/blog/fr/posts/gpt-store-diagram-tool/index.md
- Published: 2025-10-24
- Updated: 2026-10-24
- Tags: ChatGPT, UML, GPT Store, Diagrams
- Author: Antoine Boucher (https://antoineboucher.info/CV/index-en.html)The diagram tool reached **25k uses** on the GPT Store. At school, UML is how we share an idea, and I built the tool so I would stop dragging boxes and arrows in Lucidchart.

![UML diagram generated via MCP in chat](https://antoineboucher.info/CV/blog/posts/gpt-store-diagram-tool/images/uml-mcp-chat.png)

I would like someone else to carry the app forward, and I am glad to pass on what I learned. The public write-up of that plugin is [D2C OpenAI plugin](https://antoineboucher.info/CV/blog/posts/d2c-openai-diagram-plugin/). The repository is [D2COpenAIPlugin](https://github.com/antoinebou12/D2COpenAIPlugin).

Also see the project note: [D2COpenAIPlugin](https://antoineboucher.info/CV/blog/projects/notes/d2copenaiplugin/).

Source: [LinkedIn activity](https://www.linkedin.com/feed/update/urn:li:activity:7098386150813220865/).