justcaptions
Audio transcription, caption correction, translation and 15 animated video caption styles.
使うべきか
品質と安全性
検出事項（1）
- LOWTool 'pick_emojis' description lacks action verbpick_emojis 内
ツール定義とプロトコルへの準拠に関する自動分析に基づいています。
コンテキストコスト
これは、サーバーのツールがモデルのコンテキストに読み込まれるたびに消費されるおおよそのトークン数です。数が多いほど、ほかのタスクに使える注意が減ります。
インストール
ワンクリックインストール
これを `claude_desktop_config.json` ファイルに追加してください:
{
"mcpServers": {
"justcaptions": {
"url": "https://api.justcaptions.com/mcp"
}
}
}リモートエンドポイント
https://api.justcaptions.com/mcpstreamable-httpできること
ツール一覧
ツール（8）
🟢list_styles
List 15 local rendering presets, aliases, style overrides and platform safe areas. This remote server returns the catalog; render via the local MCP.
入力スキーマ
{
"type": "object",
"properties": {}
}🟢get_pricing
Current API prices and monthly free allowances, no key needed.
入力スキーマ
{
"type": "object",
"properties": {}
}🟢get_usage
Current usage, estimated bill and monthly spend cap for your configured API key.
入力スキーマ
{
"type": "object",
"properties": {}
}🟢estimate_cost(audio_seconds, text_chars)
Estimate additional cloud charges and available allowance before a batch. Includes active budget holds; does not reserve credit.
入力スキーマ
{
"type": "object",
"properties": {
"audio_seconds": {
"type": "number",
"minimum": 0,
"maximum": 864000
},
"text_chars": {
"type": "integer",
"minimum": 0,
"maximum": 100000000
}
},
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟡transcribe_audio(audio_base64, mime_type, language, glossary, request_id)
Transcribe extracted audio into segments and word timestamps. Max 12 MB decoded. Never send video. Charged by audio duration past the free allowance.
入力スキーマ
{
"type": "object",
"properties": {
"audio_base64": {
"type": "string",
"minLength": 1,
"maxLength": 16000004
},
"mime_type": {
"type": "string",
"maxLength": 100
},
"language": {
"type": "string",
"maxLength": 32
},
"glossary": {
"type": "array",
"items": {
"type": "string",
"maxLength": 200
},
"maxItems": 100
},
"request_id": {
"type": "string",
"minLength": 1,
"maxLength": 100,
"pattern": "^[A-Za-z0-9_-]+$",
"description": "Unique request ID; reuse only when retrying identical work to avoid repeating paid calls."
}
},
"required": [
"audio_base64",
"mime_type"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢correct_captions(captions, language, glossary, request_id)
Correct caption text, preserving caption count and order. Does not realign word timing. Billed by input characters.
入力スキーマ
{
"type": "object",
"properties": {
"captions": {
"type": "array",
"items": {
"type": "string",
"minLength": 1
},
"minItems": 1,
"maxItems": 400
},
"language": {
"type": "string",
"maxLength": 32
},
"glossary": {
"type": "array",
"items": {
"type": "string",
"maxLength": 200
},
"maxItems": 100
},
"request_id": {
"type": "string",
"minLength": 1,
"maxLength": 100,
"pattern": "^[A-Za-z0-9_-]+$",
"description": "Unique request ID; reuse only when retrying identical work to avoid repeating paid calls."
}
},
"required": [
"captions"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢translate_captions(captions, target_language, glossary, request_id)
Translate caption lines, preserving count and order. Target-language word timing is estimated by the local renderer. Billed by input characters.
入力スキーマ
{
"type": "object",
"properties": {
"captions": {
"type": "array",
"items": {
"type": "string",
"minLength": 1
},
"minItems": 1,
"maxItems": 400
},
"target_language": {
"type": "string",
"minLength": 1,
"maxLength": 32
},
"glossary": {
"type": "array",
"items": {
"type": "string",
"maxLength": 200
},
"maxItems": 100
},
"request_id": {
"type": "string",
"minLength": 1,
"maxLength": 100,
"pattern": "^[A-Za-z0-9_-]+$",
"description": "Unique request ID; reuse only when retrying identical work to avoid repeating paid calls."
}
},
"required": [
"captions",
"target_language"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}⚪pick_emojis(captions, language, request_id)
Pick one emoji for each caption. Billed by input characters.
入力スキーマ
{
"type": "object",
"properties": {
"captions": {
"type": "array",
"items": {
"type": "string",
"minLength": 1,
"maxLength": 200
},
"minItems": 1,
"maxItems": 1000
},
"language": {
"type": "string",
"maxLength": 32
},
"request_id": {
"type": "string",
"minLength": 1,
"maxLength": 100,
"pattern": "^[A-Za-z0-9_-]+$",
"description": "Unique request ID; reuse only when retrying identical work to avoid repeating paid calls."
}
},
"required": [
"captions"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}コミュニティ
エビデンス