# Reference Board Inspector

> Inspect your references and make a portable visual board. Validate a Pageboard project, count its references and tags, and export a self-contained HTML contact sheet and editable project file.

Part of usefulweb.site (https://usefulweb.site/). Results are deterministic calculations from the inputs and the listed assumptions; the API returns exactly what the web page shows.

## Use it
- Human interface: https://pageboardboardinspector.usefulweb.site/ (interactive tool at https://pageboardboardinspector.usefulweb.site/tool)
- JSON API: POST https://pageboardboardinspector.usefulweb.site/api/v1/calculate with a JSON object of inputs (schema: https://pageboardboardinspector.usefulweb.site/api/v1/tool)
- OpenAPI: https://pageboardboardinspector.usefulweb.site/openapi.json
- MCP (Streamable HTTP): https://pageboardboardinspector.usefulweb.site/mcp - tool `pageboard_board_inspector`

## Inputs
- project (textarea): Pageboard project JSON

## Method
- Validates the native Pageboard format, text limits, safe HTTP(S) links, screenshot data and the four-megabyte project budget before reporting.
- Counts entries, favorites, screenshots, source links, types, platforms and tags. Counts describe saved metadata; they do not evaluate the quality or accessibility of referenced websites.
- The HTML sheet embeds allowed screenshot data, escapes user text, restricts page content with a CSP, and uses safe links that open only on a user click. No remote page or image is fetched.
- Both exports can contain private notes or screenshots. Editor links embed project data in their fragment; larger projects receive a downloadable file instead.

## Limits
- The generated page contains your notes, links and embedded images. Share it only with intended recipients.