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Jina AI MCP Tools

Jina AI MCP Tools

by PsychArch

Herramientas MCP de Jina AI

Un servidor de Protocolo de Contexto de Modelo (MCP) que se integra con las API de Jina AI Search Foundation.

Características

Este servidor MCP proporciona acceso a las siguientes API de Jina AI:

  • Web Reader - Extrae contenido de páginas web usando r.jina.ai

  • Web Search - Busca en la web usando s.jina.ai o svip.jina.ai (configurable mediante --search-endpoint)

Related MCP server: Jina Web Search MCP

Requisitos previos

  1. Clave de API de Jina AI (Opcional) - Obtenga una clave de API gratuita en https://jina.ai/?sui=apikey para funciones mejoradas

  2. Node.js - Versión 16 o superior

Servidor MCP

Uso del transporte stdio (Predeterminado)

Para integraciones locales iniciadas por otro proceso (p. ej., Claude Desktop, VS Code, Cursor):

{
  "mcpServers": {
    "jina-mcp-tools": {
      "command": "npx",
      "args": [
        "jina-mcp-tools",
        "--transport", "stdio",
        "--tokens-per-page", "15000",
        "--search-endpoint", "standard"
      ],
      "env": {
        "JINA_API_KEY": "your_jina_api_key_here_optional"
      }
    }
  }
}

Uso del transporte HTTP

Para implementaciones de servidor remoto accesibles a través de HTTP:

Iniciar el servidor:

# With API key
JINA_API_KEY=your_api_key npx jina-mcp-tools --transport http --host 127.0.0.1 --port 3000

# Without API key (reader tool only, binds to 127.0.0.1 by default)
npx jina-mcp-tools --transport http --port 3000

Conectar desde clientes MCP:

  • MCP Inspector: npx @modelcontextprotocol/inspector → http://localhost:3000/mcp

  • Claude Code: claude mcp add --transport http jina-tools http://localhost:3000/mcp

  • VS Code: code --add-mcp '{"name":"jina-tools","type":"http","url":"http://localhost:3000/mcp"}'

Opciones de CLI:

  • --transport - Tipo de transporte: stdio o http (predeterminado: stdio)

  • --host - Host/interfaz para enlazar en modo HTTP (predeterminado: 127.0.0.1)

  • --port - Puerto del servidor HTTP (predeterminado: 3000, solo para transporte HTTP)

  • --tokens-per-page - Tokens por página para paginación (predeterminado: 15000)

  • --search-endpoint - Punto final de búsqueda a utilizar: standard (s.jina.ai) o vip (svip.jina.ai) (predeterminado: standard)

  • --cache-size - Tamaño de caché del lector en URL (predeterminado: 50)

  • --help - Muestra la ayuda integrada de la CLI

Variables de entorno de proxy

Las solicitudes HTTP salientes ahora respetan las variables de entorno de proxy estándar. Esto se aplica a jina_reader, jina_search y jina_search_vip.

  • Variables de proxy admitidas: HTTP_PROXY, HTTPS_PROXY, ALL_PROXY

  • También se admiten variantes en minúsculas: http_proxy, https_proxy, all_proxy

  • Las exclusiones se respetan mediante NO_PROXY / no_proxy

Ejemplo:

HTTPS_PROXY=http://proxy.internal:8080 npx jina-mcp-tools --transport stdio

Herramientas disponibles

jina_reader

Extrae y lee el contenido de una página web.

Parámetros:

  • url - URL a leer (obligatorio)

  • page - Número de página para contenido paginado (predeterminado: 1)

  • customTimeout - Anulación del tiempo de espera en segundos (opcional)

Características:

  • Paginación automática para documentos grandes

  • Caché LRU (50 URL) para solicitudes de página posteriores instantáneas

  • Las URL de archivos de GitHub se convierten automáticamente en URL de contenido sin procesar

  • Intenta primero Accept: text/markdown para una lista de permitidos mantenida de hosts de blogs/documentos compatibles con markdown, luego recurre a r.jina.ai en caso de error de recuperación o respuestas vacías

jina_search / jina_search_vip

Busca en la web. Devuelve contenido parcial; use jina_reader para obtener el contenido completo. Requiere clave de API.

La herramienta registrada depende de --search-endpoint:

  • jina_search → standard (s.jina.ai, predeterminado)

  • jina_search_vip → vip (svip.jina.ai)

Parámetros:

  • query - Consulta de búsqueda (obligatorio)

  • count - Número de resultados (predeterminado: 5)

  • siteFilter - Limitar a un dominio específico (p. ej., "github.com")

Licencia

MIT

Enlaces

Available Tools

1 tool
jina_readerJina Web ReaderC

Read and extract content from web page.

NameRequiredDescriptionDefault
urlYesURL of the webpage to read and extract content from
pageNoPage number for paginated content (1-indexed)
customTimeoutNoOverride timeout in whole seconds (1-2147483) for slow sites

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 behavioral burden, but it discloses nothing about authentication requirements, rate limits, JavaScript rendering, truncation/pagination behavior, or error handling. The presence of customTimeout implies slow sites exist but the description never explains that tradeoff.

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

Conciseness4/5

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

It is a single short sentence that is front-loaded with the core action, with zero filler. However, the extreme brevity is under-specification rather than true efficiency for a tool this thin on context.

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?

With no annotations and no output schema, the description must explain what comes back and how pagination and timeouts behave; it does neither. An agent cannot tell whether the response is raw HTML, markdown, or plain text, nor how paginated content is returned.

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 url, page, and customTimeout are each documented in the schema itself; baseline 3 applies. The description adds no extra meaning beyond what the schema already provides.

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 states a specific verb pair (read/extract) and resource (web page), so an agent knows this fetches and parses page content. With no sibling tools to distinguish from, there is nothing more to disambiguate, but it does not clarify output form (markdown vs HTML vs text).

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?

There is no when-to-use guidance, no mention of alternatives, and no conditions under which this tool should be preferred or avoided. The description is purely a statement of function.

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 updatev1.3.0
    • Changedjina_reader8 fields changed
      • changedInput schema / $schema
        Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
      • changedInput schema / properties / customTimeout / description
        Previous value: -"Override timeout in seconds for slow sites"New value: +"Override timeout in whole seconds (1-2147483) for slow sites"
      • addedInput schema / properties / customTimeout / exclusiveMinimum
        Added value: +0
      • addedInput schema / properties / customTimeout / maximum
        Added value: +2147483
      • changedInput schema / properties / customTimeout / type
        Previous value: -"number"New value: +"integer"
      • addedInput schema / properties / page / exclusiveMinimum
        Added value: +0
      • addedInput schema / properties / page / maximum
        Added value: +9007199254740991
      • changedInput schema / properties / page / type
        Previous value: -"number"New value: +"integer"
  2. 1 tool updatev1.2.4
    • Changedjina_reader1 field changed
      • removedInput schema / additionalProperties
        Removed value: -false
  3. 1 tool updatev1.2.0
    • First observedjina_reader

TDQS

B3/5.0

Scored across 1 tool

Disambiguation5/5

There is only one tool, so there is no possibility of confusion or misselection. Its purpose is clearly distinct.

Naming Consistency5/5

With a single tool named jina_reader, consistency is trivially satisfied. It follows a readable snake_case pattern.

Tool Count2/5

A server branded as 'Jina AI MCP Tools' with only one tool seems too few for the apparent scope. Jina AI typically offers multiple capabilities (search, embeddings, reranking), so one tool feels under-provisioned.

Completeness1/5

The surface only covers web page reading, with no search, embedding, reranking, or other operations implied by the Jina AI brand. This is a severely incomplete toolset for the stated purpose.

Maintenance

ActivityMaintained
ResponsivenessResponsive

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