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Agent Use Interface (AUI)

Show HN: Agent Use Interface (AUI) – let users bring their own AI agent

40 AI Score
Show_hn other Added Mar 21, 2026

Details

Sector
other
Total Funding
$0
Last Round
$0

About

As I started building AI integrations, I came to realize that for many projects, the the best agentic experience is one that simply enables the user&#x27;s personal agent to take actions within your app.<p>The existing options like MCP or A2A are quite involved and for simple apps that are already URL parameter driven, those options seem like overkill.<p>This led me to prototype the Agent Use Interface (AUI) spec.<p>The idea is simple: a lightweight, open spec that makes any app &quot;agent-navigable.&quot; You drop an XML file at &#x2F;agents&#x2F;aui.xml that describes the URL-parameter-driven actions your app supports, like search, create, filter, etc. And that way any AI agent can read aui.xml, understand what&#x27;s possible, and construct URLs on behalf of the user.<p>That&#x27;s it. No SDK. No auth flow. No API keys. Just a catalog of what your app can do, written for LLMs to understand.<p>Is there something like this that already exists? Is the approach too simple to be useful?<p>If your app already supports Universal Links or is otherwise URL parameter driven you could probably add support for AUI in an afternoon.<p>See a working example: <a href="https:&#x2F;&#x2F;habittiles.app&#x2F;agents&#x2F;aui.xml" rel="nofollow">https:&#x2F;&#x2F;habittiles.app&#x2F;agents&#x2F;aui.xml</a>

AI Score Reasoning

Heuristic score based on available signals. Funding: $0, Source: show_hn.

Source

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