Ebook File Check MCP Server

by powmcp Your server? Claim it

answering

Ebook File Check is answering right now. Last checked 14 min ago. It exposes 2 tools. Last commit 22 Sep 2026.

Run EPUBCheck for EPUB specification errors and compare two exports.

Uptime history 55 days of history · worst day 93%

55 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

469 ms

Response time

average over 24h

Stars

last commit 22 Sep 2026

What changed 2

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 24 September 2026. No other catalogue keeps this.

24 Sep 2 tool descriptions were rewritten ebook_check, ebook_compare

Nothing serious here today

Today is the operative word: we check Ebook File Check every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 14 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add epub-check --transport http https://powmcp.com/epub-check/mcp

Settings → Connectors → Add custom connector, then paste this address

https://powmcp.com/epub-check/mcp

~/.codex/config.toml

[mcp_servers.epub-check]
url = "https://powmcp.com/epub-check/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "epub-check": {
      "url": "https://powmcp.com/epub-check/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "epub-check": {
      "type": "http",
      "url": "https://powmcp.com/epub-check/mcp"
    }
  }
}

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

ebook

ebook_check

Validates one EPUB (a directly hosted public URL or a file attached in chat) against the EPUB 2/3 specification using a pinned local EPUBCheck 5.4.0 engine run in a no-network sandbox. Each call takes exactly one source: the url parameter or the file attachment, never both. Returns the automated verdict: pass boolean, EPUB version, message counts by severity (fatal/error/warning/usage), findings grouped most-severe-first with EPUBCheck rule id (RSC-005, OPF-014, …), file path and line/column, plus a structural inventory (spine items, media types, remote-resource state), SHA-256 of the exact bytes, and truncation metadata. Use for one-file readiness and diagnosis: 'is this ebook valid', 'does this EPUB have specification problems before upload', 'what is wrong with it'. A pass means only that the bytes satisfied the automated profile; it never renders the book, judges accessibility, or guarantees any store will accept it, and human review of how the book reads and looks is always required. Downloads and validates a live EPUB under a 110-second call deadline; tell the user before the call.

ebook_compare

Runs the identical pinned EPUBCheck 5.4.0 validation over exactly two EPUB builds (directly hosted public URLs or files attached in chat, baseline first, revised second) sequentially under one shared 110-second deadline, then reports which spec findings regressed or were fixed between them. Returns per-build hashes, EPUB versions, pass verdicts and severity counts, a regressions list (rules that appear or worsen in the revised build) and a fixed list (rules removed or reduced), and a ranking by pass state then fewer blocking findings. Use for 'did my re-export get worse', 'which build has fewer problems', and revision-over-revision questions. The ranking orders automated conformance only (it never means one build renders, reads, or sells better), and when both builds tie on pass state and blocking count it names no winner rather than crowning the first submission. It also flags when the two files declare different titles, since that usually means they are not two builds of one book. Human review remains required for both builds. A comparison can take up to 110 seconds under its shared deadline; tell the user before the call.

Endpoints

URL	Transport	State	Latency	Checked
https://powmcp.com/epub-check/mcp	streamable-http	answering	473 ms	14 min ago

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Ebook File Check — questions

Answers built from our own checks of this server.

What can Ebook File Check do?

It exposes 2 tools, read directly from the server on our last check. Among them: ebook_check, ebook_compare. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Ebook File Check working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 469 ms. The bar chart above shows every period we have measured.

How do I connect Ebook File Check?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Ebook File Check need an API key?

No. Ebook File Check completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Ebook File Check?

It answers our handshake in 469 ms on average, which is faster than 26% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Ebook File Check open source?

The code is open source: it is published under the MIT licence and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at powmcp.com, which runs on its operator's own terms.