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io.github.SpaceSheepBoy/justcaptions

by SpaceSheepBoy · remote · no sign-in to list tools · v1.5.1 · published by GitHub user SpaceSheepBoy

Audio transcription, caption correction, translation and 16 video caption styles.

Changes · 5
CompareRegistry entry

9 tools: 5 change things and 4 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http justcaptions https://api.justcaptions.com/mcp --header 'Authorization: <your-authorization>'

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

9 tools

Changes things 5Claude Code: ask
  • correct_captionsCorrect caption text, preserving caption count and order.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Correct caption text, preserving caption count and order. Does not realign word timing. Billed by input characters.

    Annotations the server declares

    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: true
  • estimate_costEstimate additional cloud charges and available allowance before a batch.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Estimate additional cloud charges and available allowance before a batch. Includes active budget holds; does not reserve credit.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
  • pick_emojisPick one emoji for each caption.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Pick one emoji for each caption. Billed by input characters.

    Annotations the server declares

    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: true
  • transcribe_audioTranscribe extracted audio into segments and word timestamps.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Transcribe extracted audio into segments and word timestamps. Max 12 MB decoded. Never send video. Charged by audio duration past the free allowance.

    Annotations the server declares

    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: true
  • translate_captionsTranslate caption lines, preserving count and order.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Translate caption lines, preserving count and order. Target-language word timing is estimated by the local renderer. Billed by input characters.

    Annotations the server declares

    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: true
Only reads 4Claude Code: allow
  • get_pricingCurrent API prices and monthly free allowances, no key needed.No findings

    Why it is in this group

    • The name "get_pricing" says "get": a word for reading.
    Description, as the server wrote it
    Current API prices and monthly free allowances, no key needed.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
  • get_usageCurrent usage, estimated bill and monthly spend cap for your configured API key.No findings

    Why it is in this group

    • The name "get_usage" says "get": a word for reading.
    Description, as the server wrote it
    Current usage, estimated bill and monthly spend cap for your configured API key.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
  • list_fontsList named font IDs, licenses and script coverage.No findings

    Why it is in this group

    • The name "list_fonts" says "list": a word for reading.
    Description, as the server wrote it
    List named font IDs, licenses and script coverage. Pass font_id in local rendering overrides; no cloud video rendering.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
  • list_stylesList 16 local rendering presets, aliases, style overrides and platform safe areas.No findings

    Why it is in this group

    • The name "list_styles" says "list": a word for reading.
    Description, as the server wrote it
    List 16 local rendering presets, aliases, style overrides and platform safe areas. This remote server returns the catalog; render via the local MCP.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.5.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http justcaptions https://api.justcaptions.com/mcp --header 'Authorization: <your-authorization>'

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__justcaptions__list_styles",
      "mcp__justcaptions__list_fonts",
      "mcp__justcaptions__get_pricing",
      "mcp__justcaptions__get_usage"
    ],
    "ask": [
      "mcp__justcaptions__estimate_cost",
      "mcp__justcaptions__transcribe_audio",
      "mcp__justcaptions__correct_captions",
      "mcp__justcaptions__translate_captions",
      "mcp__justcaptions__pick_emojis"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as justcaptions. Review it before you use it.