Skip to main content
Glama
enesjakozh
DeepSRT

DeepSRT MCP Server

Official
by DeepSRT
OverviewInspectSchemaRelated ServersScoreDiscussions
TypeScript
Remote

DeepSRT MCP Server

A Model Context Protocol (MCP) server that provides YouTube video summarization and transcript extraction functionality through integration with DeepSRT's API and direct YouTube caption access.

TL;DR

{ "mcpServers": { "deepsrt": { "type": "stdio", "command": "bunx", "args": [ "@deepsrt/deepsrt-mcp@latest", "--server" ] } } }

Related MCP server: YouTube MCP Integration

Architecture

graph TB subgraph "MCP Client" Client[Claude Desktop / Cline] end subgraph "DeepSRT MCP Server" Server[MCP Server] SummaryTool[get_summary] TranscriptTool[get_transcript] Server --> SummaryTool Server --> TranscriptTool end subgraph "External APIs" YouTube[YouTube InnerTube API] DeepSRT[DeepSRT Worker API] Captions[YouTube Caption API] end Client --> Server SummaryTool --> YouTube SummaryTool --> DeepSRT TranscriptTool --> YouTube TranscriptTool --> Captions

Sequence Flow

sequenceDiagram participant User participant MCP as MCP Client participant Server as DeepSRT MCP Server participant YouTube as YouTube InnerTube API participant DeepSRT as DeepSRT Worker API participant Captions as YouTube Caption API Note over User,Captions: Summary Generation Flow User->>MCP: Request video summary MCP->>Server: get_summary(videoId, lang, mode) Server->>Server: Extract video ID from URL Server->>YouTube: POST /youtubei/v1/player Note right of YouTube: Get video metadata<br/>and caption tracks YouTube-->>Server: Video details + caption tracks Server->>Server: Select best caption track<br/>(manual > auto-generated) Server->>Server: Extract transcript argument<br/>from caption URL par Summary Request Server->>DeepSRT: GET /transcript2?action=summarize Note right of DeepSRT: X-Transcript-Arg header<br/>contains caption URL params DeepSRT-->>Server: Generated summary and Title Translation Server->>DeepSRT: GET /transcript2?action=translate DeepSRT-->>Server: Translated title end Server->>Server: Format markdown response<br/>with metadata + summary Server-->>MCP: Formatted summary response MCP-->>User: Display summary Note over User,Captions: Transcript Extraction Flow User->>MCP: Request video transcript MCP->>Server: get_transcript(videoId, lang) Server->>Server: Extract video ID from URL Server->>YouTube: POST /youtubei/v1/player YouTube-->>Server: Video details + caption tracks Server->>Server: Select best caption track<br/>for preferred language Server->>Captions: GET caption XML from baseUrl Captions-->>Server: Raw XML transcript Server->>Server: Parse XML transcript<br/>- Extract timestamps<br/>- Decode HTML entities<br/>- Format text Server->>Server: Generate markdown response<br/>with timestamps Server-->>MCP: Formatted transcript MCP-->>User: Display transcript with timestamps

Technical Architecture

Core Components

1. MCP Server Layer

  • Runtime Support: Both Node.js and Bun execution

  • Protocol Handling: Model Context Protocol (MCP) request/response management

  • Tool Registration: get_summary and get_transcript tools

  • Error Handling: Comprehensive error management with user-friendly messages

2. Video Processing Pipeline

  • URL Parser: Supports multiple YouTube URL formats and direct video IDs

  • InnerTube Integration: Direct YouTube API access without API keys

  • Caption Discovery: Automatic detection of available caption tracks

  • Quality Selection: Prioritizes manual captions over auto-generated ones

3. Transcript Processing

  • XML Parser: Handles YouTube's <timedtext> format

  • Entity Decoder: Converts HTML entities to readable text

  • Timestamp Formatter: Converts milliseconds to [MM:SS] format

  • Content Filter: Removes music notation and empty segments

4. Summary Generation

  • DeepSRT Integration: Direct API calls to worker.deepsrt.com

  • Multi-language Support: Supports zh-tw, en, ja, and other languages

  • Mode Selection: Narrative and bullet-point summary formats

  • Title Translation: Automatic title translation to target language

Key Features

No Pre-caching Required

  • Works immediately for any YouTube video with captions

  • Real-time transcript extraction and processing

  • No dependency on external caching systems

Intelligent Caption Selection

  • Priority Order: Manual > Auto-generated > Any available

  • Language Preference: Respects user's preferred language

  • Fallback Strategy: Graceful degradation to available options

Robust Error Handling

  • Network timeout management (30-second timeout)

  • API error translation to user-friendly messages

  • Graceful handling of videos without captions

  • Comprehensive validation of input parameters

Multi-format Output

  • Markdown Formatting: Rich text with headers and metadata

  • Structured Data: Video information, duration, author details

  • Timestamped Transcripts: Precise timing information

  • Localized Summaries: Content in user's preferred language

Performance Characteristics

  • Fast Startup: < 1 second server initialization

  • Efficient Processing: Parallel API calls for summary + title translation

  • Memory Efficient: Streaming XML parsing, no large data buffering

  • Network Optimized: Single request per video for metadata + captions

Recent Updates

v0.1.9 (Latest)

  • ✅ Fixed critical test logic flaws: Tests now correctly validate API responses instead of checking non-existent success properties

  • ✅ Enhanced error handling: Improved graceful handling of YouTube API rate limiting (HTTP 429)

  • ✅ Robust test suite: All 56 tests now pass consistently with proper error resilience

  • ✅ Verified API integration: Confirmed both DeepSRT and YouTube APIs work correctly when not rate limited

  • ✅ Multi-language support: Validated zh-tw, en, ja summary generation

  • ✅ Production-ready: Test suite handles real-world API limitations professionally

v0.1.3

  • ✅ Fixed CLI argument parsing: Now supports both --key=value and --key value formats

  • ✅ Fixed bullet mode: --mode bullet now works correctly and generates bullet-point summaries

  • ✅ Improved bunx compatibility: Direct execution with bunx @deepsrt/deepsrt-mcp works without installation

v0.1.2

  • ✅ Fixed CLI execution: Made CLI the default binary for direct npx/bunx execution

  • ✅ Updated package configuration: Proper binary resolution for different execution methods

v0.1.1

  • ✅ Added comprehensive testing: Unit tests, integration tests, and end-to-end tests

  • ✅ Enhanced CLI tool: Full-featured command-line interface with help and examples

  • ✅ Direct transcript extraction: No pre-caching required, works with any YouTube video

Features

  • Generate summaries for YouTube videos

  • Extract full transcripts with timestamps from YouTube videos

  • Support for both narrative and bullet-point summary modes

  • Multi-language support (default: zh-tw)

  • Direct YouTube caption access (no API key required)

  • Seamless integration with MCP-enabled environments

How it Works

Summary Generation

  1. Direct YouTube Integration

    • Extracts video information and captions directly from YouTube using the InnerTube API

    • Fetches transcript content from YouTube's caption system

    • Sends transcript data to DeepSRT API for summarization

  2. Real-time Processing

    • No pre-caching required - works immediately for any video with captions

    • Automatically selects the best available captions (manual preferred over auto-generated)

    • Supports multiple languages and summary modes

Transcript Extraction

  1. Direct YouTube Access

    • Transcripts are extracted directly from YouTube's caption system using the InnerTube API

    • No pre-caching required - works immediately for any video with captions

  2. Caption Selection

    • Automatically selects the best available captions (manual captions preferred over auto-generated)

    • Supports language preference selection

    • Falls back gracefully to available alternatives

  3. Timestamp Formatting

    • Provides clean, formatted transcripts with timestamps in [MM:SS] format

    • Handles both manual and auto-generated captions

    • Includes video metadata and caption information

%%{init: {'theme': 'dark', 'themeVariables': { 'primaryColor': '#2496ED', 'secondaryColor': '#38B2AC', 'tertiaryColor': '#1F2937', 'mainBkg': '#111827', 'textColor': '#E5E7EB', 'lineColor': '#4B5563', 'noteTextColor': '#E5E7EB'}}}%% sequenceDiagram participant User participant MCP as MCP Client participant YouTube as YouTube API participant DeepSRT as DeepSRT API Note over User,DeepSRT: Summary Generation Flow (Direct Processing) User->>MCP: Request video summary MCP->>YouTube: Get video info & captions via InnerTube API YouTube-->>MCP: Return video details & caption tracks MCP->>YouTube: Fetch transcript XML from caption URL YouTube-->>MCP: Return raw transcript content MCP->>DeepSRT: Send transcript + metadata for summarization DeepSRT-->>MCP: Return generated summary MCP-->>User: Return formatted summary Note over User,DeepSRT: Transcript Extraction Flow (Direct) User->>MCP: Request video transcript MCP->>YouTube: Get video info & captions via InnerTube API YouTube-->>MCP: Return video details & caption tracks MCP->>YouTube: Fetch transcript XML from caption URL YouTube-->>MCP: Return raw transcript content MCP->>MCP: Parse & format transcript with timestamps MCP-->>User: Return formatted transcript with metadata

CLI Usage

The DeepSRT MCP server provides a unified interface that handles both MCP server mode and CLI commands.

Unified Interface

# MCP Server Mode (default - for Claude Desktop/Cline) bunx @deepsrt/deepsrt-mcp # Starts MCP server on stdio bunx @deepsrt/deepsrt-mcp --server # Explicit server mode # CLI Commands (direct usage) bunx @deepsrt/deepsrt-mcp get-transcript <video-url> [options] bunx @deepsrt/deepsrt-mcp get-summary <video-url> [options] # Help bunx @deepsrt/deepsrt-mcp --help

Direct CLI Commands (No Installation Required)

# Extract transcript with timestamps bunx @deepsrt/deepsrt-mcp get-transcript https://www.youtube.com/watch?v=dQw4w9WgXcQ bunx @deepsrt/deepsrt-mcp get-transcript dQw4w9WgXcQ --lang=en # Generate video summary bunx @deepsrt/deepsrt-mcp get-summary dQw4w9WgXcQ --lang=zh-tw --mode=bullet bunx @deepsrt/deepsrt-mcp get-summary https://youtu.be/dQw4w9WgXcQ --lang=ja

Global Installation

For easier access, install globally:

# Install globally npm install -g @deepsrt/deepsrt-mcp # MCP Server Mode deepsrt-mcp # Starts MCP server deepsrt-mcp --server # Explicit server mode # CLI Commands deepsrt-mcp get-transcript https://youtu.be/dQw4w9WgXcQ --lang=en deepsrt-mcp get-summary dQw4w9WgXcQ --lang=zh-tw --mode=narrative

CLI Options

get-transcript

bunx @deepsrt/deepsrt-mcp get-transcript <video-url> [options] Options: --lang=<language> Preferred language code for captions (default: en) --lang <language> Alternative format Examples: en, zh-tw, ja, es, fr Examples: bunx @deepsrt/deepsrt-mcp get-transcript https://www.youtube.com/watch?v=dQw4w9WgXcQ bunx @deepsrt/deepsrt-mcp get-transcript dQw4w9WgXcQ --lang=zh-tw bunx @deepsrt/deepsrt-mcp get-transcript https://youtu.be/dQw4w9WgXcQ --lang ja

get-summary

bunx @deepsrt/deepsrt-mcp get-summary <video-url> [options] Options: --lang=<language> Target language for summary (default: zh-tw) --lang <language> Alternative format Examples: zh-tw, en, ja, es, fr --mode=<mode> Summary format (default: narrative) --mode <mode> Alternative format Options: narrative, bullet Examples: bunx @deepsrt/deepsrt-mcp get-summary https://www.youtube.com/watch?v=dQw4w9WgXcQ bunx @deepsrt/deepsrt-mcp get-summary dQw4w9WgXcQ --lang=en --mode=bullet bunx @deepsrt/deepsrt-mcp get-summary https://youtu.be/dQw4w9WgXcQ --lang ja --mode narrative

Supported URL Formats

The CLI accepts multiple YouTube URL formats:

# Full YouTube URLs https://www.youtube.com/watch?v=dQw4w9WgXcQ https://www.youtube.com/watch?v=dQw4w9WgXcQ&t=30s # Short URLs https://youtu.be/dQw4w9WgXcQ # Embed URLs https://www.youtube.com/embed/dQw4w9WgXcQ # Direct video IDs dQw4w9WgXcQ

CLI Features

  • Direct execution: No installation required with bunx

  • Multiple URL formats: Full URLs, short URLs, or direct video IDs

  • Flexible argument formats: Both --key=value and --key value formats supported

  • Language support: Specify target language for summaries and transcript preferences

  • Summary modes: Choose between narrative or bullet-point formats

  • Rich output: Colored console output with progress indicators

  • Error handling: Clear error messages with suggestions

Example Output

Transcript Output

# Rick Astley - Never Gonna Give You Up (Official Video) (4K Remaster) **Author:** Rick Astley **Duration:** 3:33 **Captions:** English (manual) ## Transcript [00:18] ♪ We're no strangers to love ♪ [00:22] ♪ You know the rules and so do I ♪ [00:27] ♪ A full commitment's what I'm thinking of ♪ ...

Summary Output (Narrative Mode)

# 瑞克·艾斯利 - 永遠不會放棄你 **Author:** Rick Astley **Duration:** 3:33 **Language:** zh-tw **Mode:** narrative ## Summary 這是一首經典的流行歌曲，表達了對愛情的承諾和忠誠...

Summary Output (Bullet Mode)

# How Robots Are Helping Amazon Deliver on Prime Day **Author:** Bloomberg Television **Duration:** 5:45 **Language:** zh-tw **Mode:** bullet ## Summary 本影片主要探討亞馬遜如何運用機器人技術來提升倉儲效率... # 機器人技術在亞馬遜倉儲的應用與效益 - 亞馬遜已部署了第一百萬個機器人，並在Prime Day等高峰期用於滿足訂單需求 [00:00:00] - 機器人旨在為員工提供安全且高生產力的工作環境 [00:00:30] - 移動機器人可以搬運超過一千磅的貨物，並移動貨架以減少員工的行走距離 [00:00:54] ...

Installation

Option 1: Direct Usage with bunx (Recommended - No Installation Required)

Use the unified interface directly without any installation:

# MCP Server Mode (for Claude Desktop/Cline) bunx @deepsrt/deepsrt-mcp # Default: starts MCP server bunx @deepsrt/deepsrt-mcp --server # Explicit server mode # CLI Commands (direct usage) bunx @deepsrt/deepsrt-mcp get-transcript https://www.youtube.com/watch?v=dQw4w9WgXcQ bunx @deepsrt/deepsrt-mcp get-summary dQw4w9WgXcQ --lang=zh-tw --mode=bullet # Always uses latest version automatically bunx @deepsrt/deepsrt-mcp@latest get-transcript dQw4w9WgXcQ --lang=en

Option 2: Global Installation (For Frequent Use)

# Install globally for easier access npm install -g @deepsrt/deepsrt-mcp # Then use directly with shorter command deepsrt-mcp get-transcript https://www.youtube.com/watch?v=dQw4w9WgXcQ deepsrt-mcp get-summary dQw4w9WgXcQ --lang zh-tw --mode bullet

Option 3: Installing for Claude Desktop (Recommended)

Add this configuration to your Claude Desktop config file:

  • On macOS: ~/Library/Application Support/Claude/claude_desktop_config.json

  • On Windows: %APPDATA%/Claude/claude_desktop_config.json

{ "mcpServers": { "deepsrt": { "type": "stdio", "command": "bunx", "args": [ "@deepsrt/deepsrt-mcp@latest", "--server" ] } } }

This approach:

  • ✅ No local installation required

  • ✅ Always uses latest version

  • ✅ Automatic updates when you restart Claude

  • ✅ Cross-platform compatibility

  • ✅ Simple and clean configuration

Option 4: Installing for Cline

Add this configuration to your cline_mcp_settings.json:

{ "mcpServers": { "deepsrt": { "type": "stdio", "command": "bunx", "args": [ "@deepsrt/deepsrt-mcp@latest", "--server" ] } } }

Or just ask Cline to install in the chat:

"Hey, install this MCP server for me from https://github.com/DeepSRT/deepsrt-mcp"

Option 5: Using bunx (Direct Execution)

You can run the server directly with bunx without installation:

# Run from the project directory bunx --bun src/index.ts # Or use npm scripts npm run start:bun # Uses Bun npm run start:node # Uses Node.js npm run dev # Development mode with Bun

Usage

MCP Integration

The server provides the following tools for MCP clients:

get_summary

Gets a summary for a YouTube video.

Parameters:

  • videoId (required): YouTube video ID

  • lang (optional): Language code (e.g., zh-tw) - defaults to zh-tw

  • mode (optional): Summary mode ("narrative" or "bullet") - defaults to narrative

get_transcript

Gets a transcript for a YouTube video with timestamps.

Parameters:

  • videoId (required): YouTube video ID or full YouTube URL

  • lang (optional): Preferred language code for captions (e.g., en, zh-tw) - defaults to en

Example Usage

Using Claude Desktop:

// Get video summary const summaryResult = await mcp.use_tool("deepsrt", "get_summary", { videoId: "dQw4w9WgXcQ", lang: "zh-tw", mode: "narrative" }); // Get video transcript const transcriptResult = await mcp.use_tool("deepsrt", "get_transcript", { videoId: "dQw4w9WgXcQ", lang: "en" });

Using Cline:

// Get video summary const summaryResult = await mcp.use_tool("deepsrt", "get_summary", { videoId: "dQw4w9WgXcQ", lang: "zh-tw", mode: "bullet" }); // Get video transcript const transcriptResult = await mcp.use_tool("deepsrt", "get_transcript", { videoId: "https://www.youtube.com/watch?v=dQw4w9WgXcQ", lang: "en" });

Development

Install dependencies:

npm install

Running Tests

# Run unit tests (fast, no network calls) npm test # Run unit tests only npm run test:unit # Run network tests (requires internet, may be slower) npm run test:network # Run all tests including network tests npm run test:all # Run tests in watch mode npm run test:watch # Run tests with CI reporter (for CI/CD) npm run test:ci

Test Types:

  • Unit Tests (src/index.test.ts, src/integration.test.ts) - Fast tests with mocked data

  • Network Tests (src/transcript.test.ts, src/e2e.test.ts) - Real YouTube API integration tests

Examples

See the examples/ directory for reference implementations:

  • examples/standalone-summarizer.ts - Standalone script showing direct API usage patterns

Running the Server

With Bun (Recommended for development - faster startup):

# Development mode (runs TypeScript directly) npm run dev # or bun src/index.ts # Using npm script npm run start:bun

With Node.js (Production):

# Build first npm run build # Then run npm run start:node # or node build/index.js

Testing the Server

You can test the server using the MCP inspector:

npm run inspector

Or test manually with JSON-RPC:

# List available tools echo '{"jsonrpc": "2.0", "id": 1, "method": "tools/list"}' | bun src/index.ts # Test get_transcript echo '{"jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": {"name": "get_transcript", "arguments": {"videoId": "dQw4w9WgXcQ", "lang": "en"}}}' | bun src/index.ts

Build for Production

Build for production:

npm run build

Watch mode for development:

npm run watch

Demo

  • https://www.threads.net/@pahud/post/DGmIR7gOG5M

  • https://www.threads.net/@pahud/post/DGoGiMDuWa9

FAQ

Q: I am getting 404 error, why?

A: This is because the video summary is not cached in the CDN edge location, you need to open this video using DeepSRT chrome extension to have it cached in the CDN network before you can get that summary using MCP.

You can verify the cache status using cURL like this

curl -s 'https://worker.deepsrt.com/transcript' \ -i --data '{"arg":"v=VafNvIcOs5w","action":"summarize","lang":"zh-tw","mode":"narrative"}' | grep -i "^cache-status" cache-status: HIT

If you see cache-status: HIT the content is cached in the CDN edge location and your MCP server shoud not get 404.

One-click Deploy
A
security – no known vulnerabilities
F
license - not found
A
quality - confirmed to work

How are these scores calculated?

Resources

Appeared in Searches

New MCP Servers

Latest Blog Posts

MCP directory API

We provide all the information about MCP servers via our MCP API.

curl -X GET 'https://glama.ai/api/mcp/v1/servers/DeepSRT/deepsrt-mcp'

If you have feedback or need assistance with the MCP directory API, please join our Discord server