IoT & robotics: MCP servers, A2A agents and x402 APIs

• agri.halowerk.com Live x402

  Converts area, sampling depth, bulk density and initial/final organic-carbon mass fractions into stock estimates and a gross CO2-equivalent difference. This is a simple stock-difference calculation; it does not establis…

  x402 paid API · 10 endpoints

• crawlspur.halowerk.com Live x402

  Prüft am Objekt parameter-url den Befund Wert des X-Robots-Tags. (100 paid endpoints on crawlspur.halowerk.com.)

  x402 paid API · 12 endpoints

• iot.halowerk.com Live x402

  Groups caller-supplied scalar field changes by field name, selects the highest version, and reports a conflict when equal-version values differ. It does not connect to a twin platform, merge nested documents or resolve…

  x402 paid API · 10 endpoints

• omardev.xyz Live x402

  Extract structured metadata from any URL: page title, meta description, Open Graph and Twitter Card tags, canonical URL, favicons, language, generator and robots directives, plus RSS/Atom feed links. Give it a URL, get…

  x402 paid API · 2 endpoints

• ozdreamtools.de Live x402

  Audits a website for AI agent and AI crawler readiness from caller-supplied inputs: robots.txt, HTML, headers, llms.txt, sitemap lastmod, /.well-known. Names the policy per AI token (GPTBot, OAI-SearchBot, ChatGPT-User,…

  x402 paid API · 12 endpoints

• penny-army-reference-mainnet.spruceboundgranitestudio.workers.dev Live x402

  Inventory supplied robots.txt groups, literal rule strings and sitemap declarations; no fetching or permission evaluation. (4 paid endpoints on penny-army-reference-mainnet.spruceboundgranitestudio.workers.dev.)

  x402 paid API · 4 endpoints

• pennyregwatch.com Live x402

  Check robots.txt before crawling or scraping a page. Decide whether GPTBot, ClaudeBot, Googlebot, or another crawler may fetch the exact URL and return ALLOW/DENY, winning rule, crawl-delay, sitemap URLs, and live prove…

  x402 paid API · 7 endpoints

• proof.platoskallipolis.com Live x402

  Before an AI agent trusts or pays a public API, inspect its public machine-readable evidence and x402 readiness. Submit a public HTTPS domain to check its agent card, OpenAPI, robots policy, and settlement-aware x402 si…

  x402 paid API · 1 endpoint

• seo-data-extractor.underscoredone.com Live x402

  Give this API a web address and it will visit that page, then hand back everything an SEO professional needs to know: the page title, meta description, meta keywords, robots instructions, canonical link, H1/H2/H3 headin…

  x402 paid API · 1 endpoint

• toolbelt402.tpoborne.workers.dev Live x402

  Check a URL before fetching it: is it alive, final URL after redirects, HTTP status, content type, HTML title, and whether robots.txt allows your user-agent. Link checker and fetch preflight for agents. (2 paid endpoint…

  x402 paid API · 2 endpoints

• url2md.io Live x402

  PDFs, JavaScript pages and ordinary HTML as clean Markdown. Pays a page's x402 toll for you. Follows robots.txt.

  x402 paid API · 1 endpoint

• web.openverbs.com Live x402

  Fetch a site's robots.txt and evaluate crawl permissions: given a URL (plus optional extra paths) and a user-agent, return whether each path is allowed or disallowed, the rule that matched, the user-agent group, the cra…

  x402 paid API · 9 endpoints

• x402-gateway-production-1f21.up.railway.app Live x402

  Extract webpage metadata, OpenGraph and JSON-LD. Returns title, description, canonical URL, robots directives, headings, Open Graph, Twitter cards and structured data for one public URL per paid request. (12 paid endpoi…

  x402 paid API · 12 endpoints

• Spraay x402 Gateway x402

  Pay-per-use AI, DeFi, payment, compute, and RTP primitives for autonomous agents via x402 and MPP on Base.

  x402 paid API · 12 endpoints · check 90/100

Related capabilities

x402 paid APIsWeb scrapingAI models & inferenceAgent infrastructureOn-chain dataMarketing & SEOTrading & marketsNews

How to use one

MCP servers plug into Claude, ChatGPT, Cursor and other AI clients; A2A agents take tasks over JSON-RPC; x402 APIs charge per call in USDC with no account. Guides: A2A vs MCP · How to call an A2A agent · x402 for agents.

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