PDF Viewer vs AILANG Parse
PDF Viewer is a plugin bundle for AI coding tools published by Anthropic. Marketplaces we read that list it: 1 (Claude: knowledge-work-plugins). AILANG Parse is an MCP server published by sunholo-data. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-12. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  AILANG Parse | |
|---|---|---|
| Claude: knowledge-work-plugins | Listed Version: 0.2.0 Forks (GitHub): 3 317 Stars (GitHub): 29 279 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 0.13.1 Downloads/month (npm): 329 Downloads/week (npm): 37 Forks (GitHub): 1 Stars (GitHub): 0 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | PDF Viewer | AILANG Parse |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 29 279 (better) | 0 (worse) |
| Forks (GitHub) (differs) | 3 317 (better) | 1 (worse) |
| Last release | Not published | Not published |
| Where it runs (differs) | On your machine (@modelcontextprotocol/server-pdf) | Remote server (docparse.ailang.sunholo.com/mcp) |
| Transport (differs) | Not stated | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | Not published | 2, secrets among them: 1 |
| Parts of the bundle (differs) | 6 | Not a bundle |
| Licence | Not stated | Not stated |
| Repository (differs) | github.com/anthropics/knowledge-work-plugins | github.com/sunholo-data/ailang-parse |
| Changes in the last 7 days | 0 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | no remote endpoint we check | not checked yet |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
PDF Viewer
View, annotate, and sign PDFs in a live interactive viewer. Mark up contracts, fill forms with visual feedback, stamp approvals, and place signatures — then download the annotated copy.
AILANG Parse
Deterministic DOCX/PPTX/XLSX/PDF parser: track changes, comments, headers, footers, merged cells.
How to run each
PDF Viewer
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
AILANG Parse As a remote MCP server
claude mcp add --transport http parse https://docparse.ailang.sunholo.com/mcp/Requires: DOCPARSE_API_KEY (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
The marketplaces of PDF Viewer publish no settings it asks for, so we do not compare settings.
What it can do: PDF Viewer · What it can do: AILANG Parse · Compare two other plugins
Data comes from the public marketplace file https://github.com/anthropics/knowledge-work-plugins/blob/HEAD/.claude-plugin/marketplace.json. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.