MCP.Market

Caption File Check MCP server

online · 100% uptime
by powmcp.com·com.powmcp/caption-file-check·v0.3.3
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Parse WebVTT, SRT, or TTML for conformance, timing, overlaps, line length, and reading speed.

A92/100grade A
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Safety scan
A92/100

full report

Adoption
Growing

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If you have run it, two minutes of your experience saves the next person an afternoon.

Caption File Check tools (2)

write = sends, deletes, buys or posts
  • caption_checkFree

    Preflight one caption or subtitle file before delivery. Attach a WebVTT (.vtt), SRT (.srt), or TTML/IMSC (.ttml/.xml) caption file in chat or give a publicly fetchable URL and it downloads the artifact under an SSRF-guarded, 2 MB-capped fetch, detects the format by content and the byte encoding and BOM, then parses it with the real spec engine (the WebVTT spec parser, a dedicated SRT parser, or the imscJS TTML/IMSC profile engine) and returns deterministic evidence: pass/fail, cue count, structural spec and IMSC profile-conformance errors, overlapping / negative / out-of-order / empty cues, per-line length, and per-cue and summary reading speed (CPS) against a named platform profile (netflix-adult-20, netflix-children-17, youtube, ebu-tt). It reports only source-file conformance, timing, encoding, and reading-speed facts against a dated profile. It does not judge translation quality, transcription accuracy, or synchronization against the video. An arbitrary XML or text file that is not a caption track returns an explicit unsupported-format error. Fetching and parsing a full-length track can take up to 60 seconds. WebVTT limitation: the parser drops payload-less cues; cue counts, indices, timing checks and comparisons cover retained cues only, not those omitted cues.

  • caption_compareFree

    Compare exactly two caption or subtitle files under identical bounded checks: an original versus its translated track, before versus after a timing fix, or a format migration. Attach two WebVTT, SRT, or TTML/IMSC caption files in chat or give two publicly fetchable URLs and it runs the same SSRF-guarded, 2 MB-capped preflight as caption_check on each, then aligns them by cue index and reports side-by-side pass status, detected-format and encoding differences, the cue-count delta, timing drift and overlap differences, reading-speed (CPS) regressions, structural-error deltas, and a winner only when the measured checks separate the two. Use caption_check for a single file. It reports only source-file conformance, timing, encoding, and reading-speed facts against a dated profile: never translation quality, transcription accuracy, or sync against the video. Fetching and parsing two live files can take up to 60 seconds. WebVTT limitation: the parser drops payload-less cues; cue counts, indices, timing checks and comparisons cover retained cues only, not those omitted cues.

Public scan report

scanner v0.1.10 · 2026-10-14 · same rubric, same numbers if you re-run it

no findings
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 873ms20/20
  • Tool poisoning2 tool descriptions checked15/15
  • Auth qualityopen endpoint, read-only tools10/15
  • Maintenancelast push 22 days ago15/15
  • Maintainer identityregistry namespace matches repository owner; website matches verified namespace9/10
Overall 92/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Caption File Check compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
92/100
higher than 93% of 48,243 servers
Tools
2
the typical server has 7
Tools that change things
0%
typical: 0%. Fewer write tools means less an agent can break
Uptime
100%
of our recent checks; the typical remote server answers 100%
Response time
103 ms
faster than 83% of 30,027 servers

What its tools let an agent do: 2 read

Release history: 2 versions in the registry since 2026-09-10, latest 2026-09-22, typically one every 12 days.

Install Caption File Check in Claude Code, Cursor or VS Code

claude mcp add --transport http caption-file-check https://powmcp.com/caption-file-check/mcp
Add to Cursor

What the publisher says

From the Caption File Check repository's README, as published. We do not edit it. Read it on GitHub

PowMCP MCP server guide

PowMCP provides hosted, task-specific MCP servers. This repository documents three of them, their remote connection URLs, and their public MCP Registry descriptors. The hosted server implementation is proprietary and is not contained in this repository. You do not need to install or run code from this repository to use the servers.

Each URL is a separate remote MCP server using Streamable HTTP. Add only the URL for the tool you need to an MCP client that supports remote servers. For example, a client that accepts an mcpServers JSON entry can use:

{
  "mcpServers": {
    "powmcp-ssl-certificate-check": {
      "type": "http",
      "url": "https://powmcp.com/ssl-certificate-check/mcp"
    }
  }
}

Replace the name and URL with one of the other entries above to connect another server. The individual app pages also provide client-specific connection buttons and commands. If your client requests authorization, complete its native sign-in flow. Client support for PowMCP account linking varies; consult the connection instructions on the app page. Usage allowances and any paid options are shown on the PowMCP apps and usage page.

The guides explain each tool's input and what its result can establish. For help with connection or results, contact support@powmcp.com. See support and security for reporting guidance.

The MIT license applies to documentation, descriptors, and example configuration in this repository. It does not grant a license to the proprietary hosted implementation or to PowMCP's names and logos. References to third-party validation standards and components in the guides do not imply ownership of them by PowMCP.

Nothing above is checked by us. What we check is on the safety report.

Grade history

  • 2026-10-14restoreC → Ascore 92

Caption File Check: common questions

Is Caption File Check MCP server safe?
Yes, by our scan: it is graded A (92/100). Read the Caption File Check safety report
How do I install Caption File Check?
It runs remotely at powmcp.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does Caption File Check need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Caption File Check maintained?
The last commit was 44 days ago (2026-09-22). The latest release is v0.3.3.
Is Caption File Check up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
How does Caption File Check compare with other MCP servers?
safety score 92/100 (higher than 93% of 48,243 servers); tools 2 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

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