"How to build your own knowledge base" matching MCP connectors:

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

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.

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

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

rss2json: convert any RSS/Atom feed to JSON. Keyless basic, optional API key for count.

Fetch any web page's fully rendered HTML, AI-parsed structured JSON, or Google search results through ScrapeUnblocker's anti-bot scraping API (bypasses Cloudflare, DataDome, PerimeterX, Akamai). Bring your own API key.

8 pay-per-call web intelligence tools for AI agents: detect a site's tech stack and track stack changes, check domain health, extract structured data or clean markdown from any URL, turn sitemaps into knowledge bases, analyze Shopify and Zid stores. Free discovery + pricing_info; paid calls $0.01-0.02 in USDC on Base via x402 — pay only for successful runs.

8 pay-per-call web intel tools over MCP. Free discovery, calls settle in USDC on Base (x402).

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

Match shopper intent to a merchant's products and fetch live price, stock and product Q&A.

Pay-per-call AI tools over x402: web research, summarization, structured extraction (USDC, Base).

URL to clean article markdown/text + metadata and links. Deterministic. $0.001/call via x402.

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

Validate whether an IP address belongs to SeznamBot. Remote MCP server exposing a validate_ip tool.

x402 MCP web parser: URLs to Markdown for agents. USDC on Base, Polygon, Arbitrum, Ethereum.

Convert any public webpage to a PDF. Single narrow tool, not a bloated PDF toolkit.