## [API Sequence Diagrams in Confluence with Mermaid (Copy-Paste)](/blog/mermaid-api-sequence-diagram-confluence.md)

September 24, 2026 ·

<!-- -->

5 min read

[NGPilot](https://ngpilot.com)

The integration doc says "the client calls the API, the API validates and responds" — four words, zero contracts, and the onboarding engineer asks "with what headers, in what order, and what if auth fails?" The code has the truth; the wiki has a paragraph. An API that can't be read as a transcript is an API nobody can safely operate.

**Quick answer:** document API flows in Confluence as Mermaid — `sequenceDiagram` for request/response order, `packet-beta` for wire-format frames, ZenUML for branch-heavy async flows — rendered by [Mermaid Plus for Confluence](https://marketplace.atlassian.com/apps/1236814/mermaid-plus-diagrams-for-confluence/). Each diagram type answers a different reader: what order, what's on the wire, what branches. This post gives you three copy-paste examples.

**Tags:**

* [confluence](/blog/tags/confluence.md)
* [mermaid](/blog/tags/mermaid.md)
* [sequence-diagram](/blog/tags/sequence-diagram.md)
* [packet](/blog/tags/packet.md)
* [zenuml](/blog/tags/zenuml.md)
* [api](/blog/tags/api.md)
* [how-to](/blog/tags/how-to.md)

[**Read more**](/blog/mermaid-api-sequence-diagram-confluence.md)