"Information about backend development or backend systems" matching MCP connectors:

An MCP server that gives any LLM or agent clean YouTube transcripts on demand: a single video, a whole channel, or a playlist, plus AI cleanup of auto-generated captions. API-key auth, credit-based, same backend as the public v1 API. Get a free API key with 25 free credits at youtubetranscriptdownload.com/account.

Product search and price comparison for AI agents. Search 100M+ products across thousands of retailers by text or image, compare live offers and prices, and turn any merchant URL into structured product data. No API key required to start; add one for unlimited use and affiliate commission.

Docs: https://docs.keenable.ai/mcp-server Keenable is a free, remote MCP server that gives agents access to the web index. Search the web with ranked results and date/site filters, then fetch any indexed page as clean markdown. Works out of the box with no account or API key.

Render HTML, Markdown, or URLs to images, PDF, or branded artifacts; extract and watch pages.

Web page or HTML to clean LLM-ready Markdown or JSON. x402 pay-per-call, $0.005, no API key.

Extract public web pages to clean JSON or Markdown via MCP. No-key demo; failed calls not billed.

Checks whether a website is readable and citable by AI systems (ChatGPT, Claude, Perplexity, etc.)

Ranks the best AI tool or API per task: transcription, TTS, web search, scraping and OCR.

Download DocSend and Papermark decks as PDF or PPTX, including email-gated and protected links.

Fetch any Russian website or API via a Russian IP — flagship tool fetch_ru. Pay x402/RUB.

AI agent website builder. Create and publish link-in-bio sites via MCP or REST API.

Instant web publishing for AI agents. POST HTML, get a live URL. No account needed. Publish, update, and delete websites via MCP or REST API. Free tier includes 5MB sites with 24-hour expiry. Pro tier offers permanent hosting.

Document processing, data conversion, and web content APIs for AI agents. All tools are free via MCP. Also available as a paid x402 Agent API (Stellar XLM or Solana USDC, no API key required). Tools: extract text from PDFs, merge PDFs, generate QR codes, convert CSV to/from JSON, count words/stats, and fetch + clean any public URL with Mozilla Readability.

Scan any website for SEO, performance, accessibility, and AI search issues. Returns structured issues with fix prompts you can paste into Claude or Cursor to fix immediately. 40+ checks including Core Web Vitals, Open Graph, structured data, and AI search visibility.

Screenshot any website with one API call PNG, JPEG, WebP, or PDF. Custom viewports, device emulation, ad blocking, dark mode, and smart caching.

Free screenshot and webpage capture API. Capture full-page screenshots, specific elements, or PDF snapshots of any URL. No API keys required.

Free HTML/URL to PDF conversion API. Convert HTML content or any URL to high-quality PDF documents. No API keys required.

40+ web scraping tools from Firecrawl, Bright Data, Jina, Olostep, ScrapeGraph, Notte, and Riveter. Scrape, crawl, screenshot, and extract from any website. Starts at $0.01/call. Get your API key at app.xpay.sh or xpay.tools

Fetch pages as markdown or HTML, search the web and news, and extract JSON-LD structured data. Built for AI agents. $2.50/1k requests, 500 free on signup.

Scrape real tweets from X (Twitter) by keyword, hashtag, profile, advanced search, URL, or thread. Clean structured JSON, no official X API key, pay only per unique tweet delivered.