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MCP Video Recognition Server

An MCP server that describes images, transcribes audio, and summarizes video from local files. It talks to Google Gemini by default, or to any OpenAI-compatible endpoint such as OpenRouter.

Features

  • Pick your provider: Google Gemini (default) or an OpenAI-compatible endpoint

  • Three MCP tools for local images, audio, and video

  • Optional Gemini model fallback, plus a final OpenAI-compatible backup

  • Opt-in multi-perspective parallel inference via PARALLEL_PROMPTS (see the Configuration Reference)

Model support varies by provider. Picking the OpenAI-compatible provider does not mean every endpoint or model handles every media type. And the server never swaps in a different model or provider on its own.

Related MCP server: Puter MCP Server

Prerequisites

  • Node.js 18.0.0 or later

  • An API key for your provider:

    • Gemini: GOOGLE_API_KEY

    • OpenAI-compatible: OPENAI_COMPATIBLE_API_KEY

Install

git clone https://github.com/yourusername/mcp-video-recognition.git
cd mcp-video-recognition
npm install
npm run build

Quickstart

Add the server to your MCP client config and point it at the built dist/index.js:

{
  "mcpServers": {
    "video-recognition": {
      "command": "node",
      "args": ["/path/to/mcp-video-recognition/dist/index.js"],
      "env": {
        "GOOGLE_API_KEY": "your_google_api_key"
      }
    }
  }
}

On Windows, use forward slashes or doubled backslashes (\\) in the path. Save the file and reconnect your MCP client. Environment variables must be present in the MCP client's env configuration; the server process does not automatically inherit values merely because a .env file exists beside it.

For OpenRouter or another OpenAI-compatible endpoint, set RECOGNITION_PROVIDER=openai-compatible and fill in its variables. Configuration has a ready-made example.

Standalone Client

The repository includes a client that builds the project, spawns the server over stdio, performs MCP initialization, and lists the tools. It loads .env from the repository root when that file exists; already-set process environment variables take precedence.

# Connect and list tools
npm run client

# Connect and call a tool
npm run client -- --tool image_recognition --args '{"filepath":"C:/media/example.png"}'

Use --help for server-path, working-directory, env-file, and timeout options:

npm run client -- --help

A tool error exits with status 2 and prints the complete MCP error result. Connection or configuration failures exit with status 1 and include the spawned server's stderr diagnostics.

With FLUJO:

  1. Click Add Server.

  2. Paste the GitHub URL.

  3. Click Parse, Clone, Install, Build and Save.

Configuration

The server reads environment variables. These are the ones you'll touch most:

Variable

Default

Purpose

RECOGNITION_PROVIDER

gemini

gemini or openai-compatible

GOOGLE_API_KEY

none

Gemini API key

GEMINI_MODEL

gemini-3.5-flash

Gemini model to use

OPENAI_COMPATIBLE_API_KEY

none

OpenAI-compatible API key

OPENAI_COMPATIBLE_BASE_URL

none

Endpoint base URL

OPENAI_COMPATIBLE_MODEL

none

Model to use

ALLOWED_MEDIA_ROOTS

none

Media directories for the OpenAI-compatible provider and Gemini backup

TRANSPORT_TYPE

stdio

stdio or streamable-http; sse is a legacy alias

MCP_HOST

127.0.0.1

Bind address for Streamable HTTP

PORT

3000

Bind port for Streamable HTTP

LOG_LEVEL

info

Diagnostic threshold; all logs go to stderr

A bad value stops startup. Nothing gets fixed silently.

The Configuration Reference has the full variable list, validation rules, an OpenRouter example, and the supported media types. For Gemini model fallback and the final backup, read the Provider Recovery Reference.

Tools

You get three MCP tools. Each takes a local filepath, an optional prompt (default Describe this content), and an optional modelname override.

  • image_recognition - describe an image

  • audio_recognition - transcribe or describe audio

  • video_recognition - describe a video

Example:

{
  "name": "video_recognition",
  "arguments": {
    "filepath": "/path/to/video.mp4",
    "prompt": "Describe what happens in this video"
  }
}

Security

  • HTTPS is required by default. Plain HTTP only works for a local endpoint you explicitly enable.

  • The OpenAI-compatible provider and the Gemini backup read media only from directories listed in ALLOWED_MEDIA_ROOTS. Containment is recursive, so specifying a parent folder (e.g. C:\Projects or ${workspaceFolder}) covers all repositories, subfolders, and media files inside it.

  • Keys stay in the process environment. Don't commit real keys.

The Security Reference covers endpoint rules, resource limits, and incident response.

MCP Inspector and Streamable HTTP

For stdio Inspector use, build first and make sure the API key is in Inspector's server environment. In PowerShell:

$env:GOOGLE_API_KEY = "your_google_api_key"
npm run debug

For HTTP, start the server separately:

$env:GOOGLE_API_KEY = "your_google_api_key"
$env:TRANSPORT_TYPE = "streamable-http"
npm start

Then select Streamable HTTP in Inspector and connect to http://127.0.0.1:3000/mcp. Do not select legacy SSE: the backwards-compatible TRANSPORT_TYPE=sse spelling still starts a Streamable HTTP endpoint.

Listing tools only proves the MCP handshake succeeded. It does not contact the recognition provider or read a media file. A later call can still fail because the key, model, network, or filepath is invalid. The path must identify a file visible to the spawned server process; paths from a different container or host will not work.

Development

# Build, connect through the standalone client, and list tools
GOOGLE_API_KEY=your_api_key npm run client

# Build and run the provider foundation tests
npm run verify:provider-foundation

Project Structure

  • src/index.ts: entry point and provider construction

  • src/server.ts: MCP server and transport

  • src/tools/: the three recognition tools

  • src/services/: Gemini and OpenAI-compatible providers

  • src/types/: shared types

  • src/utils/: helpers

License

MIT

Available Tools

3 tools
audio_recognitionC

Analyze and transcribe audio using Google Gemini AI

ParametersJSON Schema
NameRequiredDescriptionDefault
filepathYesPath to the media file to analyze
modelnameNoGemini model to use for recognitiongemini-2.0-flash
promptNoCustom prompt for the recognitionDescribe this content

TDQS

C2.9/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions 'analyze and transcribe' but fails to describe key traits such as processing time, error handling, output format, or any limitations (e.g., file size, supported audio formats). This leaves significant gaps for a tool that performs AI-based analysis.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence that directly states the tool's function without unnecessary words. It is appropriately sized and front-loaded, making it easy to parse quickly.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the complexity of AI-based audio analysis, no annotations, and no output schema, the description is incomplete. It lacks details on behavioral aspects, output structure, and usage context, which are critical for an agent to effectively invoke this tool without trial and error.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema description coverage is 100%, with clear descriptions for all parameters (filepath, modelname, prompt). The description adds no additional semantic context beyond what the schema provides, such as examples or constraints, so it meets the baseline for high schema coverage without compensating value.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb 'analyze and transcribe' and the resource 'audio' with the technology 'Google Gemini AI', making the purpose evident. However, it doesn't explicitly differentiate from sibling tools like 'image_recognition' or 'video_recognition' beyond the audio focus, which prevents a perfect score.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives like sibling tools or other audio processing methods. It lacks context about use cases, prerequisites, or exclusions, leaving the agent to infer usage from the name alone.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

image_recognitionC

Analyze and describe images using Google Gemini AI

ParametersJSON Schema
NameRequiredDescriptionDefault
filepathYesPath to the media file to analyze
modelnameNoGemini model to use for recognitiongemini-2.0-flash
promptNoCustom prompt for the recognitionDescribe this content

TDQS

C2.9/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden of behavioral disclosure. While 'analyze and describe' implies a read-only operation, it doesn't specify whether this requires API keys, has rate limits, handles errors, or what the output format looks like. For a tool with no annotations and no output schema, this leaves significant behavioral gaps.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise - a single sentence that directly states the tool's purpose without any unnecessary words. It's front-loaded with the core functionality and uses efficient language. Every word earns its place in this minimal description.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given that there are no annotations, no output schema, and this is an AI analysis tool with potential behavioral complexities, the description is insufficiently complete. It doesn't explain what kind of analysis or description will be returned, doesn't mention authentication requirements for Google Gemini AI, and provides no context about limitations or error handling.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already documents all three parameters (filepath, modelname, prompt) with clear descriptions. The tool description adds no additional parameter semantics beyond what's in the schema. According to the rules, when schema coverage is high (>80%), the baseline score is 3 even with no param info in the description.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose: 'Analyze and describe images using Google Gemini AI'. It specifies the verb ('analyze and describe'), resource ('images'), and technology ('Google Gemini AI'), making the purpose unambiguous. However, it doesn't explicitly differentiate from sibling tools like audio_recognition or video_recognition, which would require mentioning it's specifically for images.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives. It doesn't mention sibling tools (audio_recognition, video_recognition) or any context for choosing this specific image analysis tool over others. There's no information about prerequisites, limitations, or typical use cases.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

video_recognitionC

Analyze and describe videos using Google Gemini AI

ParametersJSON Schema
NameRequiredDescriptionDefault
filepathYesPath to the media file to analyze
modelnameNoGemini model to use for recognitiongemini-2.0-flash
promptNoCustom prompt for the recognitionDescribe this content

TDQS

C2.9/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the tool analyzes and describes videos but doesn't mention critical behavioral aspects like rate limits, authentication requirements, file size limits, supported video formats, processing time, or error handling. The description is too vague about what 'analyze and describe' entails operationally.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence that states the core functionality without unnecessary words. It's appropriately sized and front-loaded with the essential information, making it easy for an agent to parse quickly.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the complexity of video analysis (which typically involves format handling, processing time, and potential errors), no annotations, and no output schema, the description is insufficient. It doesn't explain what the tool returns, how to interpret results, or any operational constraints, leaving significant gaps for an AI agent to use it effectively.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already documents all three parameters thoroughly. The description adds no additional parameter semantics beyond what's in the schema, such as explaining how the prompt interacts with video analysis or model selection trade-offs. Baseline 3 is appropriate when schema does the heavy lifting.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose as analyzing and describing videos using Google Gemini AI, which is specific (verb+resource) and distinguishes it from sibling tools like audio_recognition and image_recognition. However, it doesn't explicitly mention video-specific capabilities beyond the name, leaving some ambiguity about whether it handles all video formats or specific features.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus its siblings (audio_recognition, image_recognition). It doesn't mention prerequisites, limitations, or alternative scenarios, leaving the agent to infer usage based on tool names alone.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

TDQS

B3.2/5.0
Disambiguation5/5

Each tool has a clearly distinct purpose targeting different media types: audio, images, and videos. There is no overlap in functionality, as they handle separate input formats with similar analysis capabilities but different domains.

Naming Consistency5/5

All tool names follow a consistent pattern of 'media_type_recognition' using snake_case. This predictable naming scheme makes it easy to understand what each tool does based on its name alone.

Tool Count3/5

With only 3 tools, the server feels somewhat thin for a video recognition domain, as it lacks operations like video editing, frame extraction, or metadata retrieval. However, the core recognition functions for audio, images, and videos are covered, making it borderline appropriate.

Completeness3/5

The server provides basic recognition for three media types but lacks comprehensive coverage for video processing. There are no tools for operations like video segmentation, object tracking, or format conversion, which are common in video recognition workflows, leaving notable gaps.

Maintenance

ActivityMaintained
ResponsivenessResponsive

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