"How to Use or Manage Knowledge Base in Feishu" 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.

Connect AI to millions of laws and court cases with the Lawstronaut MCP.

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.

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.

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

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.

Do things on live websites: prices, availability, quotes, bookings, anything behind a form or login.

URL to Markdown or structured JSON (schema.org/OG); renders SPA; batch reads. No signup/key.

AI-powered website change monitoring - manage monitors and alerts via MCP.

Know whether an AI agent should REUSE or REFETCH a URL before retrieving it again.

Convert files, URLs, and documents to clean, AI-ready Markdown via MCP.

Verify citations in AI text: fetches each cited source, returns verdicts with evidence quotes.

Run multi-step tasks in a real Chrome browser: persistent environments, live view, human takeover.

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

Pay-per-use web extract, token prices, and wallet balances via x402 USDC micropayments.

Compact, citation-verifiable public web context for AI agents, paid per use with x402.

Cite or capture a web page; installs the capture extension in Firefox and Chrome.

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

Diffbot MCP — Knowledge Graph company enrichment + web content extraction (diffbot.com)

DNS, WHOIS/RDAP, DMARC/SPF, LEI, sitemap, web extract, VAT, QR. Paid per call in USDC, no signup.