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PopNx MCPServidores MCP para quienes usan IA · explicados con palabras sencillas

Alterlab MCP

de RapierCraftversión 1.12.11i★ –iComputadora o nube
Nombre en el registroio.alterlab/mcp-server

Instalar

Resumen

Descripción del creador (original en inglés)

Web scraping MCP server — scrape, extract structured data, screenshot any site with anti-bot bypass.

Los tres pilares de PopNx MCP

Estos tres nunca se combinan en una sola puntuación: las opiniones, las mediciones y la popularidad son cosas distintas.

Qué puedes hacer con él

Todavía no escribimos un resumen sencillo para este. Abajo están los datos que leímos del registro.

Instalación

Elige la app de IA que usas y copia la configuración.

Antes de instalar

Necesitas

¿Qué app usas?

Elige tu app arriba. La recordamos, así que la próxima vez el botón dirá “Instalar en …”.

Funciona en Claude para web, escritorio y móvil:

  1. Abre Settings → Connectors
  2. Presiona Add custom connector
  3. Pega la dirección de abajo y presiona Add
  4. Si te pide iniciar sesión, inicia sesión en el servicio del creador
SettingsConnectors1+ Add2https://…3
https://mcp.alterlab.io/mcp

O ejecútalo en tu computadora

Abre Claude Desktop → Settings → Developer → Edit Config y pega esto en claude_desktop_config.json

{
  "mcpServers": {
    "alterlab": {
      "command": "npx",
      "args": [
        "-y",
        "alterlab-mcp-server"
      ]
    }
  }
}

Ejecuta esto en tu terminal

claude mcp add --transport http alterlab https://mcp.alterlab.io/mcp

O ejecútalo en tu computadora

claude mcp add alterlab -- npx -y alterlab-mcp-server

Abrir en Cursor

O copia la configuración tú

Pégalo en .cursor/mcp.json de tu proyecto, o en ~/.cursor/mcp.json

{
  "mcpServers": {
    "alterlab": {
      "url": "https://mcp.alterlab.io/mcp"
    }
  }
}

O ejecútalo en tu computadora

Abrir en Cursor

O copia la configuración tú

Pégalo en .cursor/mcp.json de tu proyecto, o en ~/.cursor/mcp.json

{
  "mcpServers": {
    "alterlab": {
      "command": "npx",
      "args": [
        "-y",
        "alterlab-mcp-server"
      ]
    }
  }
}

Tu navegador te pide permiso para abrir la app; luego la app muestra la configuración y te pide confirmar. Los valores de las claves quedan vacíos para que los completes tú.

Abrir en VS Code

O copia la configuración tú

Pégalo en .vscode/mcp.json de tu proyecto

{
  "servers": {
    "alterlab": {
      "type": "http",
      "url": "https://mcp.alterlab.io/mcp"
    }
  }
}

O ejecútalo en tu computadora

Abrir en VS Code

O copia la configuración tú

Pégalo en .vscode/mcp.json de tu proyecto

{
  "servers": {
    "alterlab": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "alterlab-mcp-server"
      ]
    }
  }
}

Tu navegador te pide permiso para abrir la app; luego la app muestra la configuración y te pide confirmar. Los valores de las claves quedan vacíos para que los completes tú.

ChatGPT solo se conecta a servidores en internet:

  1. Abre ChatGPT en la web → Settings → Connectors (Apps)
  2. Presiona Create o Add (en algunos planes primero hay que activar Developer mode en Advanced)
  3. Pega la dirección de abajo, ponle un nombre y guarda
  4. Si te pide iniciar sesión, inicia sesión en el servicio del creador
SettingsConnectors1+ Create2https://…3
https://mcp.alterlab.io/mcp

Los nombres de los menús pueden variar un poco según el plan y con el tiempo.

Tu elección se guarda en una cookie en este dispositivo; no necesitas cuenta.

Esta configuración se genera a partir de la ficha del creador en el registro. Si el README dice otra cosa, sigue el README.

Qué puede hacer

Nombres y descripciones de las herramientas tal como los informó el servidor el 6 nov 2026. Los escribió el creador, no nosotros; los mostramos como texto sin formato.

  • alterlab_scrape

    Fetch one URL and return its content as clean markdown, text, HTML, or JSON. Use when a normal fetch returns 403/429, a bot-protection challenge page, a CAPTCHA, or an empty JavaScript shell. Website challenges and JavaScript-heavy pages are handled automatically by a 5-tier syst

  • alterlab_extract

    Extract structured data (prices, product info, contact details, custom fields) as JSON from HTML, text or markdown you already hold. Use when you have content and need specific fields. Does not fetch a URL: to fetch and extract in one step, use alterlab_scrape with extraction_sch

  • alterlab_screenshot

    Capture a full-page PNG screenshot of one URL, an image rather than text content. Use when a normal fetch returns 403/429, a bot-protection challenge page, a CAPTCHA, or an empty JavaScript shell. Works on anti-bot-protected sites, rendered in a real headless browser. Use wait_fo

  • alterlab_crawl

    Crawl a whole website and return the content of every page, for RAG, indexing or site-wide export. Use when you need many pages from one domain; for one URL use alterlab_scrape, for a URL list only use alterlab_map. Works on JavaScript-heavy and protected sites, with anti-bot han

  • alterlab_search

    Search the web and get structured results (URLs, titles, snippets). Use when you have a question or topic but no URL yet; follow up with alterlab_scrape to read a page, or set scrape_results=true to read every result in one call. Use domain to restrict to one site and time_range

  • alterlab_map

    List every URL on a site via sitemap parsing and link extraction, without fetching page content. Use before alterlab_crawl or alterlab_batch to choose pages; to read the content itself use alterlab_crawl. Works on JavaScript-heavy and protected sites. When you present results to

  • alterlab_batch_scrape

    Scrape 2-20 URLs in parallel and get every result back in one synchronous call, no polling required. Use when a normal fetch returns 403/429, a bot-protection challenge page, a CAPTCHA, or an empty JavaScript shell. Failed URLs report their error; successful ones return content.

  • alterlab_batch

    Start an asynchronous batch job for a large URL set (up to 100 per call) and poll for results later. Use when a normal fetch returns 403/429, a bot-protection challenge page, a CAPTCHA, or an empty JavaScript shell. Each URL can have its own mode, formats and extraction_schema. R

  • alterlab_estimate_cost

    Estimate the credit cost of scraping a URL before you run it. Use when cost matters or before a large job; no credits are charged. Returns the predicted tier, estimated cost and confidence. Full machine-readable price list: GET https://alterlab.io/api/v1/pricing (public, no auth)

  • alterlab_pricing

    Get AlterLab's machine-readable price list: per-tier cost, bring-your-own-proxy discount, cache-hit discount, add-ons, search and SERP prices, and the free allowance. Use when deciding whether AlterLab fits a budget, before any account exists. Free and keyless; nothing is scraped

  • alterlab_news

    Search aggregated news headlines from curated public sources: headline, URL, source, published time, author, image, short snippet and category. Use to find what is being reported on a topic. Served from a cache that refreshes about every 15 minutes, so a call never triggers a fet

  • alterlab_keyword_ideas

    Fan out a seed keyword across autocomplete (seed + a-z + who/what/how/why/best/vs), People Also Ask and related searches, and get deduplicated ideas, each with source, question flag, intent (question, commercial, navigational, informational) and a 0-1 relevance score. volume is a

  • alterlab_ai_visibility

    Run prompts against AI answer engines through their public, logged-out interfaces and get, per engine and run, the answer text, whether the brand is mentioned and its position, competitors mentioned, cited URLs and domains and a sentiment label, plus per-prompt mention rate, shar

  • alterlab_feedback

    Tell AlterLab when something is hard, or what would make it better. Call this when something blocks you, a result is wrong, or a step is confusing, slow or priced unexpectedly, and also to send a suggestion (category `suggestion`, ideas welcome even when nothing is broken). Descr

  • alterlab_support_ticket

    Open a support ticket in your user's AlterLab account when they need a human: a billing, account or data problem. Do not use it for scrape friction, blocks or ideas; use `alterlab_feedback` for those. Ask the user first: a ticket reaches a human and emails them. Requires an API k

  • alterlab_create_account

    Create an AlterLab account and API key for your user. Use only when no ALTERLAB_API_KEY exists yet; skip it if a key is already configured. Signup is on behalf of your user (agent signup with human approval). Nothing is created until the human approves: they get an email (and you

  • alterlab_create_api_key

    Create one scoped, spend-capped API key (ALTERLAB_API_KEY) for the SDK and REST API on this machine. Works only when the user ticked "Also create an API key for this machine" on the OAuth approval screen, so no second approval is needed. Skip it if a key is already configured. Th

  • search_alterlab

    Use this to look up how to do something with AlterLab (API parameters, SDKs, MCP setup, pricing, error codes, migration from Firecrawl/ScrapingBee/Apify) or to find a guide for scraping a specific site. Searches the docs guides and API reference by default (blog posts only when y

  • read_alterlab_page

    Use this after search_alterlab to read the full text of one AlterLab page as markdown, so you can follow the documented steps instead of guessing. Pass the url of a search result. Only pages on alterlab.io that search_alterlab can return are readable. Free: needs no API key and n

  • alterlab_serp

    Query a search engine and get structured results: organic listings, ads and related data, from Google, Bing or DuckDuckGo. Use action=search (default) to run a query, or action=history to read earlier SERP queries for your account. Prefer alterlab_search when you also want each r

  • alterlab_job

    Look up a job by id. action=status (default) returns its status and result once finished; set wait (seconds) to hold the request until the job reaches a terminal status. action=explain returns the ordered per-stage timing breakdown, useful when a job was slow or failed. Job ids c

  • alterlab_balance

    Read account credit data. action=balance (default) returns the current credit balance in microcents (1,000,000 microcents = $1.00) with formatted values. action=usage returns usage statistics. Read-only; call it before an expensive crawl or batch to confirm there are enough credi

  • alterlab_monitor

    Manage change monitors. action=create watches a URL on a cron schedule and notifies by webhook when content changes; action=list returns your monitors; action=delete removes one by monitor_id (it stops running and cannot be restored). Each check spends credits like a scrape.

  • alterlab_schedule

    Manage recurring scrape schedules. action=create runs a scrape of one or more URLs on a cron expression; action=list returns your schedules; action=delete removes one by schedule_id (it stops triggering). Every run spends credits like a scrape; minimum intervals depend on your ba

  • alterlab_workflow_run

    Start an execution of a workflow you saved in the AlterLab dashboard. Optional input_data is passed to the workflow's webhook trigger node. Returns run_id, workflow_id and the initial status. The run spends credits for the steps it executes.

Revisiones básicasi

Revisamos información que cualquiera puede ver; no hemos leído el código. Las revisiones que no aplican no se cuentan. · Revisado el 6 nov 2026

  • ✓ Superada

    El creador coincide con el repo

    El nombre en el registro se verificó con el dominio alterlab.io (el registro comprueba quién es dueño del dominio)

  • … Aún sin revisar

    Sigue en mantenimiento

    Todavía no hemos leído este repo en GitHub

  • … Aún sin revisar

    Tiene licencia

    Todavía no hemos leído este repo en GitHub

  • ✓ Superada

    El endpoint responde

    Respondió en 492 ms (HTTP 200)

  • – No aplica

    Inicio de sesión con OAuth

    No hace falta iniciar sesión

  • ✓ Superada

    Sin instrucciones ocultas en las descripciones de herramientas

    Leímos 25 descripciones de herramientas y no encontramos instrucciones ocultas para la IA

Comparado con otros en Web y navegadoresi

  • Más estrellas que el 0% de los otros 876 servidores de esta categoría
  • Publicado en el registro más recientemente que el 99% de los otros 876 servidores de esta categoría
  • Revisiones básicas iguales o mejores que el 100% de los otros 876 servidores de esta categoría

Comparado con todos los servidores activos de esta categoría en el registro. Las estrellas solo cuentan cuando quien lo publica es dueño del repo.

Preguntas frecuentes

¿Es seguro Alterlab MCP?

Superó 3 de 3 revisiones básicas aplicables. No hemos leído el código. Antes de agregar una clave o un token, revisa qué acceso pide el servidor y usa una clave que tenga solo los permisos que necesitas.

¿Qué claves o códigos necesita?

El registro no indica ninguna clave obligatoria, aunque algunos servidores te piden iniciar sesión la primera vez que los usas.

¿Se ejecuta en mi computadora o en la nube?

Funciona de las dos formas: instálalo en tu computadora o conéctate a la versión en la nube.

¿Sigue en mantenimiento?

El repo de GitHub cambió por última vez –, y la última versión (1.12.11) llegó al registro hoy.

¿Qué apps pueden usarlo?

Las apps compatibles con MCP, como Claude Desktop, Claude Code, Cursor y VS Code. Se conecta por URL, así que también funcionan las apps que aceptan servidores MCP remotos, como ChatGPT en modo desarrollador.

¿Qué puedo usar en su lugar?

En la misma categoría: Browser Use, Chrome DevTools MCP, MCP Server Browser

Alternativas

Servidores de la misma categoría hechos por otros creadores, ordenados por estrellas.

Cómo leer una tarjeta:★ Estrellas de GitHubiTres pilares: reseñas · revisiones · usoiActualizado = fecha en que se publicó la última versión en el registroi

Browser Use

de browser-use

Browser agents and stealth cloud browsers for AI: run web tasks, fill forms, extract data.

Computadora o nube★ 120.087MITActualizado hace 16 días
Instalar

Chrome DevTools MCP

de ChromeDevTools

MCP server for Chrome DevTools

Se ejecuta en tu computadora★ 54.821Apache-2.0Actualizado hace 15 días
Instalar

MCP Server Browser

de bytedance

MCP server for browser use access

Se ejecuta en tu computadora★ 39.550Apache-2.0Actualizado hace 14 meses
Instalar

README del creador

Abrir el README

Copiado tal cual del repo del creador. PopNx MCP no lo ha revisado ni lo respalda. Se quitaron HTML, imágenes y scripts. Los enlaces llevan fuera de este sitio.

AlterLab MCP Server

Give Claude, Cursor, and Windsurf the ability to scrape any website, extract structured data, and take screenshots — with automatic anti-bot bypass.

Get Started Free → $1 free balance on signup — up to 5,000 scrapes.


One-Line Install

Claude Code
claude mcp add alterlab -- npx -y alterlab-mcp-server@latest

Then set your API key: export ALTERLAB_API_KEY=sk_live_... or add it to .claude.json (see full setup below).

Cursor
# Add to .cursor/mcp.json — see full config below
Smithery
npx -y @smithery/cli install alterlab-mcp-server --client claude

Why AlterLab Instead of WebFetch or Browser MCP?

Claude's built-in WebFetch tool and open-source browser MCP servers fail on most real-world websites. They cannot bypass Cloudflare, render JavaScript SPAs, or extract structured data.

AlterLab replaces broken fetch tools with one MCP server that actually works:

CapabilityWebFetch / fetch()Browser MCPAlterLab MCP
Anti-bot bypass (Cloudflare, DataDome, Akamai)NoPartialYes — automatic
JavaScript rendering (React, Angular, Vue SPAs)NoYes (slow)Yes — headless Chromium
Structured data extraction (JSON, Schema.org)NoNoYes — built-in profiles
Smart tier escalation (cheapest method first)N/AN/AYes — saves 60-80%
Residential proxy rotation (195+ countries)NoNoYes
Screenshot and PDF captureNoScreenshot onlyYes — both
OCR text extraction from imagesNoNoYes
Cost per requestFree (but fails)Free (but slow)From $0.0002

How Does AlterLab Web Scraping Work?

AlterLab uses a multi-tier scraping architecture. It automatically selects the cheapest method capable of fetching each URL:

  1. Curl ($0.0002/req) — Direct HTTP for static pages, RSS feeds, public APIs
  2. HTTP ($0.0003/req) — TLS fingerprint rotation for moderately protected sites
  3. Stealth ($0.002/req) — Browser impersonation for Cloudflare/DataDome-protected sites
  4. Light JS ($0.0025/req) — Lightweight JS extraction from server-rendered HTML
  5. Browser ($0.004/req) — Full headless Chromium for JavaScript-heavy SPAs

Auto mode starts at Tier 1 and escalates only when blocked. Most websites resolve at Tiers 1-2, so $1 gets you 1,000 to 5,000 scrapes depending on the sites you target.


Installation

Install in Claude Desktop / Claude Code

Add to your Claude config file (~/.claude.json for Claude Code, or Settings for Claude Desktop):

{

"mcpServers": { "alterlab": { "command": "npx", "args": ["-y", "alterlab-mcp-server@latest"], "env": { "ALTERLAB_API_KEY": "sk_live_your_key_here" } } } }

Install in Cursor

Add to .cursor/mcp.json in your project root:

{

"mcpServers": { "alterlab": { "command": "npx", "args": ["-y", "alterlab-mcp-server@latest"], "env": { "ALTERLAB_API_KEY": "sk_live_your_key_here" } } } }

Install in Windsurf

Add to Windsurf MCP settings (~/.codeium/windsurf/mcp_config.json):

{

"mcpServers": { "alterlab": { "command": "npx", "args": ["-y", "alterlab-mcp-server@latest"], "env": { "ALTERLAB_API_KEY": "sk_live_your_key_here" } } } }

Install via Smithery
npx -y @smithery/cli install alterlab-mcp-server --client claude
Get Your API Key
  1. Sign up free — $1 free balance on signup
  2. Go to Dashboard → API Keys and copy your key
  3. Paste it into the ALTERLAB_API_KEY field in your MCP config

Tools

alterlab_scrape — Scrape Any Webpage

Scrape a URL and return its content as markdown, text, HTML, or JSON. Automatically handles anti-bot protection with tier escalation. Returns markdown by default — optimized for LLM context windows.

"Scrape https://www.amazon.com/dp/B0BSHF7WHW and summarize the product"
ParameterTypeDefaultDescription
urlstringrequiredURL to scrape
modeauto \html \js \pdf \ocrautoScraping mode
method / body / content_type / headersenum / string / enum / objectGETPOST support (1.5x cost) and custom target headers
formats`(text\json\json_v2\html\markdown\rag\content\raw)[]`["markdown"]Output formats
extraction_schema / extraction_promptobject / string—LLM extraction (+$0.001)
extraction_profile / extraction_templateenum—auto, product, article, job_posting, faq, recipe, event, ecommerce_homepage, directory_listing (template is a deprecated alias)
extraction_provider / extraction_modelenum / string—BYOK LLM selection
evidence, promote_schema_org, filter_contentboolean—Extraction behaviour
cache, cache_ttl, force_refreshboolean / number / boolean—Response caching (cache_ttl 60-86400)
render_jsboolean \"auto"API defaultHeadless browser (forces Browser tier, $0.004)
use_proxy, proxy_countryboolean, string—Premium proxy (+$0.0002) and geo-targeting
use_own_proxy, use_system_proxy, proxy_integration_idboolean, boolean, string—Bring-your-own-proxy selection
skip_tls_verificationboolean—Omit (recommended) = verify, fall back on invalid certs; true skip, false require valid cert
wait_for, wait_until, wait_conditionstring—Selector / load-event waits
actionsobject[] (max 20)—Browser actions: wait, wait_for, click, fill, press, scroll, infinite_scroll, screenshot, evaluate
screenshot, generate_pdf, ocrboolean—Add-ons (+$0.0002 / +$0.0004 / +$0.001)
scroll_to_load, scroll_count, enable_scrollboolean / 1-10 / boolean—Lazy-load handling
include_iframes, flatten_shadow_dom, block_images, remove_cookie_bannersboolean—Rendering options
section_filterobject—Filter for json_v2 sections
session_id, cookies, session_headersUUID, object, object—Authenticated scraping
sticky_session, sticky_session_ttlstring, 300-7200—Reuse cookies and exit IP across calls (paid plans)
location{country, language}—Geo-targeting
cost_controlsobject—force_tier, max_tier, max_credits, prefer_cost, prefer_speed, fail_fast, time_budget (prefer_cost, prefer_speed, fail_fast also accepted at top level)
embeddingsobject—enabled, model, chunk_size, chunk_overlap (+$0.001/page)
sync_policyauto \wait_until_deadlineautoWait behaviour for long scrapes
timeout, max_response_bytes, include_raw_htmlnumber, number, boolean90, 5 MB, falseLimits and raw output
estimate_firstbooleanfalseRun a free cost estimate first

Not exposed: source (dashboard tracking tag), sync (the tool is always synchronous), webhook_url (use alterlab_batch/alterlab_crawl webhooks). If a scrape outlives the ~85s synchronous window the tool returns a job_id; fetch it with alterlab_get_job.

alterlab_extract — Extract Structured Data

Extract structured fields from HTML, text or markdown content using pre-built profiles or custom JSON Schema. Returns clean JSON — ready for databases, spreadsheets, or downstream processing.

"Extract the product name, price, and rating from this Amazon page"
ParameterTypeDefaultDescription
contentstring (max 500,000)requiredHTML, text or markdown you already have (this tool does not fetch a URL)
content_typehtml \text \markdownhtmlType of content
extraction_profile / extraction_templateenum—Profile: auto, product, article, job_posting, faq, recipe, event, ecommerce_homepage, directory_listing
extraction_schemaobject—Custom JSON Schema for structured output
extraction_promptstring—Natural language extraction instructions
extraction_provider / extraction_modelenum / string—BYOK LLM selection
formatsenum[]["json"]Output formats
source_url, evidencestring, boolean—Context URL and provenance
cache, cache_ttlauto \skip \only, numberautoExtraction result cache

To scrape and extract in one step, use alterlab_scrape with extraction_schema.

Extraction profiles:

  • Product — name, price, currency, rating, reviews, availability, images, description
  • Article — title, author, published date, body text, featured image
  • Job Posting — title, company, location, salary, description, requirements
  • FAQ — question-answer pairs
  • Recipe — ingredients, instructions, prep time, servings
  • Event — name, date, location, description, organizer
alterlab_screenshot — Screenshot Any Page

Take a full-page screenshot of any URL. Returns a PNG image directly in the conversation — no URLs to copy, no files to download.

"Take a screenshot of our landing page at https://alterlab.io"
ParameterTypeDefaultDescription
urlstringrequiredURL to screenshot
wait_forstring—CSS selector to wait for before capture
wait_untilenumnetworkidlenetworkidle, domcontentloaded, or load
timeoutnumber90Timeout in seconds (1-300)
use_proxy, proxy_countryboolean, string—Premium proxy and geo-targeting
session_id, cookiesUUID, object—Screenshot pages behind a login
location{country, language}—Geo-targeting
alterlab_estimate_cost — Estimate Before You Scrape

Check how much a scrape will cost before running it. Returns the predicted tier, cost per request, and confidence level.

"How much would it cost to scrape linkedin.com?"
ParameterTypeDefaultDescription
urlstringrequiredURL to estimate
modeenumautoScraping mode
methodGET \POSTGETPOST costs 1.5x
render_jsboolean \"auto"falseInclude JS rendering cost
use_proxy, use_own_proxybooleanfalseInclude proxy cost / BYOP discount

| `screen

Solo se muestra el principio; lee el resto en el repo

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