MCP for DOCX manipulation

Upload Word documents, edit DOCX via MCP/API, and get embeddable HTML. Ephemeral by design.

Edit DOCX

Modify Microsoft Word DOCX files — replace text, remove or append paragraphs, insert HTML parts, and export DOCX or HTML.

MCP native

Connect Claude Code or Cursor agents with Bearer auth. No npm package required. Keep your code thin and lightweight.

REST API

Upload, convert, and modify with simple HTTP endpoints. Same engine, any client.

DOCX Engine

The fastest DOCX to HTML converter. In less than <1s for most DOCXs. Production-ready for developers.

HTML preview

Embeddable HTML previews ready to use in your solution.

Ephemeral storage

We convert, not archive. Files expire automatically; history stays in your account.

Benchmarks

This table measures DOCX→HTML conversion speed and structural fidelity across tools on 39 local files, using the same docxc flags as the hosted API, not network RTT.

Tool	Median	p95	Fidelity
docx.sh	9.2 ms	10 ms	94.6%
mammoth	48 ms	71 ms	94.0%
pandoc	70 ms	95 ms	91.0%
docx-cli	152 ms	158 ms	90.4%
SafeDocx	295 ms	308 ms	90.6%
SuperDoc	568 ms	585 ms	79.1%
LibreOffice	1720 ms	1779 ms	92.2%

docx.sh: 39/39 files under 1s. Slowest median: 28 ms.
Test configuration: arm64, 10 vCPU, 16.0 GB RAM, Darwin 25.6.0, 2026-08-15, local CLI.
These numbers are local CLI conversion time, not hosted API round-trip (upload to HTML over the network).
Fidelity is a structural score: the mean of heading-level match, paragraph-count ratio, table shape, list-item ratio, and token Jaccard versus OOXML gold (word/document.xml). Not visual or pixel fidelity.
Public corpus: superdoc-dev/docx-corpus
Rendering quality was also calibrated on a private legaltech document set that we cannot publish because it contains sensitive information.

Pricing

Billed through Polar.sh. HTML download does not count toward API/MCP call limits.

Plan	Price	Calls/mo	Max DOCX
Free	Free	10	5 MB	Sign up
Basic	$12.99/mo · $79.99/yr	100	20 MB	Subscribe
Pro 2×	$25.99/mo	220	20 MB	Subscribe
Pro 5×	$64.99/mo	1000	20 MB	Subscribe