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MCP Fetch With Proxy

by kwp-lab
OverviewSchemaSourceRelated ServersDiscussionsAdmin
JavaScript
Remote

Obtención de MCP

Servidor de Protocolo de Contexto de Modelo para obtener contenido web con un proxy HTTP personalizado. Esto permite a Claude Desktop (o a cualquier cliente MCP) obtener contenido web y gestionar imágenes correctamente.

Este repositorio se bifurca de @smithery/mcp-fetch y reemplaza la implementación node-fetch con la biblioteca node-fetch-native .

El servidor usará las variables de entorno http_proxy y https_proxy para enrutar las solicitudes a través del servidor proxy de forma predeterminada, si están configuradas. También puede configurar la variable de entorno MCP_HTTP_PROXY para usar un servidor proxy diferente.

Herramientas disponibles

  • fetch : Recupera URL de internet y extrae su contenido como Markdown. Si se encuentran imágenes, sus URL se incluirán en la respuesta.

Especificaciones de procesamiento de imágenes:

Solo extrae las URL de las imágenes del contenido del artículo y añádelas al resultado de la herramienta:

{
  "params": {
    "url": "https://www.example.com/articles/123"
  },
  "response": {
    "content": [
      {
        "type": "text",
        "text": "Contents of https://www.example.com/articles/123:\nHere is the article content\n\nImages found in article:\n- https://www.example.com/1.jpg.webp\n- https://www.example.com/2.jpg.webp\n- https://www.example.com/3.webp"
      }
    ]
  }
}

Related MCP server: crawl4ai-mcp

Inicio rápido (para usuarios)

Para utilizar esta herramienta con Claude Desktop, simplemente agregue lo siguiente a su configuración de Claude Desktop ( ~/Library/Application Support/Claude/claude_desktop_config.json ):

{
  "tools": {
    "fetch": {
      "command": "npx",
      "args": ["-y", "@kwp-lab/mcp-fetch"],
      "env": {
        "MCP_HTTP_PROXY": "https://example.com:10890" // Optional, remove if not needed
      }
    }
  }
}

Esto descargará y ejecutará automáticamente la última versión de la herramienta cuando sea necesario.

Configuración requerida

  1. Habilitar accesibilidad para Claude:

    • Abrir configuración del sistema

    • Vaya a Privacidad y seguridad > Accesibilidad

    • Haga clic en el botón "+"

    • Añade a Claude desde tu carpeta de Aplicaciones

    • Encienda el interruptor para Claude

Para desarrolladores

Las siguientes secciones son para aquellos que quieran desarrollar o modificar la herramienta.

Prerrequisitos

Instalación

Instalación mediante herrería

Para instalar MCP Fetch para Claude Desktop automáticamente a través de Smithery :

npx -y @smithery/cli install @kwp-lab/mcp-fetch --client claude

Instalación manual

git clone https://github.com/kwp-lab/mcp-fetch.git
cd mcp-fetch
npm install
npm run build

Configuración

  1. Asegúrese de que Claude Desktop esté instalado y funcionando.

  2. Instale tsx globalmente si aún no lo ha hecho:

    npm install -g tsx
# or
pnpm add -g tsx

  3. Modifique la configuración de Claude Desktop ubicada en:

~/Library/Application Support/Claude/claude_desktop_config.json

Puedes encontrarlo fácilmente a través del menú de Claude Desktop:

  1. Abra Claude Desktop

  2. Haga clic en Claude en la barra de menú de Mac

  3. Haga clic en "Configuración"

  4. Haga clic en "Desarrollador"

Agregue lo siguiente a la configuración de su cliente MCP:

{
  "tools": {
    "fetch": {
      "args": ["tsx", "/path/to/mcp-fetch/index.ts"]
    }
  }
}

Available Tools

1 tool
fetchA

Retrieves URLs from the Internet and extracts their content as markdown. If images are found, their URLs will be included in the response.

ParametersJSON Schema
NameRequiredDescriptionDefault
urlYes
maxLengthNo
startIndexNo
rawNo

TDQS

A3.7/5.0
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 content extraction and image URL inclusion, but doesn't cover important aspects like error handling (e.g., invalid URLs, network failures), rate limits, authentication needs, privacy implications, or what happens when maxLength is exceeded. The description is insufficient for a tool that interacts with external resources.

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 perfectly concise with two clear sentences that each add value. The first sentence establishes the primary function, and the second adds important behavioral detail about image handling. No wasted words or redundant information.

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

Completeness3/5

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

For a tool with 4 parameters, no annotations, and no output schema, the description provides adequate basic functionality explanation but lacks sufficient detail about behavioral characteristics, error conditions, and output format. The absence of sibling tools reduces complexity, but the description should do more to compensate for the lack of structured metadata.

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

Parameters4/5

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

The description doesn't mention any parameters directly, but with 0% schema description coverage, it doesn't compensate for the lack of parameter documentation. However, the tool has 4 parameters with clear schema definitions (url, maxLength, startIndex, raw), and the description's focus on the core functionality provides some context. The baseline would be lower if the schema were less informative.

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

Purpose5/5

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

The description clearly states the tool's purpose with specific verbs ('retrieves', 'extracts') and resources ('URLs from the Internet', 'content as markdown'), and explicitly mentions handling of images. It distinguishes what the tool does without relying on the generic name 'fetch'.

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

Usage Guidelines3/5

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

The description implies usage for retrieving and converting web content to markdown, but provides no explicit guidance on when to use this tool versus alternatives (though no sibling tools are listed). It lacks information about prerequisites, error conditions, or performance considerations.

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

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

  1. 1 tool update
    • First observedfetch
Deploy Server
One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

TDQS

A3.6/5.0

Scored across 1 tool

Disambiguation5/5

With only one tool, there is no possibility of confusion or overlap between tools, making disambiguation perfect. The single tool has a clear and distinct purpose without any competing alternatives.

Naming Consistency5/5

The single tool name 'fetch' follows a simple verb pattern, and with only one tool, consistency is inherently perfect. There are no other tools to create naming conflicts or inconsistencies.

Tool Count2/5

A single tool is too few for most server purposes, as it limits functionality and flexibility. While it might suffice for basic fetching, it feels thin and under-scoped for a server named 'MCP Fetch With Proxy', which suggests broader capabilities.

Completeness2/5

The tool surface is severely incomplete; it only provides fetching and markdown extraction without supporting operations like configuration, error handling, or advanced proxy management. This leaves obvious gaps for a server with 'Proxy' in its name, such as setting or testing proxy settings.

Maintenance

ActivityInactive
ResponsivenessNo issues

Resources

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