# Key-Value Input

> A dynamic form field for adding, editing and removing up to three unique key/value metadata pairs, with built-in validation for blank or duplicate keys and max-length limits. Ported to React from SL UI Library's vanilla HTML/JS component (MIT, original by SLtowl).

- Author: [sltowl](https://21st.dev/@sltowl)
- Library: SLtowl
- License: MIT
- Tags: Input, Form
- Live preview: https://21st.dev/@sltowl/components/matte-inputs-key-value-v11

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/sltowl/matte-inputs-key-value-v11?api_key=$API_KEY_21ST"
```

Requires a 21st API key (generate one at https://21st.dev/mcp) passed as `API_KEY_21ST`. Free accounts get a limited number of installs per day; unlimited on a paid plan — see https://21st.dev/pricing.

Full component directory: https://21st.dev/llms.txt · More like this: https://21st.dev/community/components/s/input.md