"A server for exploring information about quantum physics or quantum-related topics" matching MCP connectors:

Website QA for your coding agent: audit SEO, performance, security, accessibility over MCP.

Clean YouTube transcripts for agents: single videos, channels, playlists, plus AI caption cleanup.

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.

CatchAll is a web search API built for comprehensive event retrieval — not ranked results, but all matching records.

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

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.

Pay-per-call web scraping for AI agents via x402 on Base USDC. Six tools, no signup.

Audits websites for cookie consent compliance across major privacy frameworks. Point it at any URL and get a structured PASS/FAIL checklist with regulatory citations and fix recommendations — no browser, no manual inspection required.

Pay-per-call web scraping for AI agents — no signup, no API keys, just USDC micropayments via the x402 protocol on Base. Six tools: scrape webpages, extract structured data, capture screenshots, parse metadata, manage browser sessions, and run workflows. Runs on Cloudflare Workers with Browser Rendering. Free tier: 10 calls per wallet per 30 days.

Pre-computed navigation recipes for public websites — skip explore-and-discover.

Reliable web access for AI agents: smart HTTP, rotating proxies, and full-browser rendering.

Fast, intelligent web search and web crawling. New mcp tool: Exa-code is a context tool for coding

Read a URL as clean markdown, screenshot a website, url to PDF. Web access for agents, no signup.

Website intelligence audits for AI agents: free preview plus x402-paid Agent Readiness scoring

Any public page to clean JSON or Markdown, plus Reddit with no API key. Failed calls are free.

Screenshots, PDFs and Markdown from any URL or HTML for AI agents, via the SnapForge API

Visit https://brave.com/search/api/ for a free API key. Search the web, local businesses, images,…

Free public web freshness and response-metadata checks for AI agents.

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