slugify

CDN detection for a site: from response headers (cf-ray, x-served-by, via, x-cache, x-akamai, x-amz-cf-id...), server names and the announcing network of the site's IP. Cloudflare, Akamai, Fastly, CloudFront, Vercel, Netlify, Imperva, Sucuri, Bunny, KeyCDN, Gcore and more. $0.01 per site.

Page change detection: hashes the readable text of a page and compares with the version from your previous call (kept 90 days). Reports whether it changed, how much (word delta and similarity), and a sample of added/removed lines. Watch competitor pages, docs or listings. $0.01 per check.

CMS and platform detection: WordPress, Shopify, Squarespace, Wix, Webflow, Drupal, Joomla, Magento, BigCommerce, Ghost, HubSpot, Framer, Notion, Substack, Contentful/Sanity/Strapi and JS frameworks (Next.js, Nuxt, Astro, SvelteKit, Angular, React, Vue) with version hints from the generator tag and server header. $0.01 per site.

HTTP compression check: whether a page is served with gzip, brotli or zstd, the content-encoding actually negotiated, transfer size vs decoded size where available, and the vary header. Performance sanity check for any site. $0.01 per page.

Does a page contain a phrase? Fetches the page and searches its readable text (case-insensitive) for the phrase you give, returning found/not found with a snippet of context and the match count. Stock alerts, price wording, 'sold out' checks and content verification. $0.01 per check.

Cookie audit from the Set-Cookie headers of a page load: each cookie's name, Secure, HttpOnly and SameSite flags, expiry/max-age, domain and path, with counts of cookies missing Secure or SameSite. Privacy and security hygiene without a browser. $0.01 per page.

CORS check for a URL: sends a request with an Origin (and a preflight OPTIONS) and reports Access-Control-Allow-Origin/Methods/Headers/Credentials, whether the origin is allowed, wildcard use, and the risky combination of wildcard with credentials. Integration and security testing. $0.01 per check.

Date extraction from a page: the published and modified dates from meta tags and schema.org, plus dates found in the text (ISO, US and long forms), the earliest and latest, and a best guess at the publication date. Content freshness and timeline building. $0.01 per page.

Favicon and app icon finder: every icon a site declares (favicon, apple-touch-icon, mask-icon, manifest icons) with sizes and types, plus whether /favicon.ico exists. Get a company logo for cards, CRMs and dashboards. $0.01 per site.

RSS / Atom feed discovery: finds feeds declared in a page's link tags, common feed paths (/feed, /rss, /atom.xml, /feed.xml) that respond, and feed URLs listed in robots.txt or sitemaps. Subscribe agents to any site's updates. $0.01 per site.

Form detection on a page: every form with its action URL, method, field names and types, and a classification (login, signup, search, newsletter, contact, checkout, other), plus whether passwords are posted over HTTPS. Understand what a page lets a user do. $0.01 per page.

The most-cited papers on a topic (Crossref citation counts), for literature reviews and finding the foundational work: title, authors, year, venue, DOI, citations, abstract. $0.02 per search.

All published versions of an npm package with publish dates, the dist-tags (latest, next, beta...), total version count, first and latest publish dates, releases in the last 90 days, and the 30 most recent versions. Release-cadence and pin-selection helper. $0.01 per package.

HTTP status code reference: give a class like 4xx to list every code in it with its reason phrase, a specific code for its meaning and typical use, or a word (e.g. 'teapot', 'redirect', 'auth') to search. Covers all IANA-registered codes 100-511 including 402 Payment Required (used by x402). $0.01 per lookup.

HTTP status code explained: the standard reason phrase, what it means and what a client should do, for every common code, or the full list for a class like '4xx'. $0.01 per lookup.

All released versions of a PyPI project with release dates (from the first file upload of each release), yanked flags, total count, first/latest release dates, releases in the last 90 days and the 30 most recent. Python release-cadence helper. $0.01 per project.

HTTP/3 and modern-transport support: checks the DNS HTTPS record (alpn, ech, ipv4hint), the Alt-Svc response header for h3, and reports whether HTTP/3 (QUIC), HTTP/2 and Encrypted Client Hello are advertised. Useful for protocol-compatibility and performance audits. $0.01 per domain.

Keyword monitor: fetches a page and reports, for each keyword you give (comma-separated after the URL), whether it is present in the readable text, how many times, and a context snippet; also remembers the previous result per URL so it can tell you which keywords appeared or disappeared since your last call. 'Sold out', 'in stock', price wording, name mentions. $0.01 per check.

Latency probe: three sequential timed requests to a URL from Cloudflare's edge, reporting min/avg/max/jitter in milliseconds, the status of each attempt, response size, and the server/CDN header. Cheap synthetic performance sampling for status dashboards and vendor SLAs. $0.01 per probe.

USD to MXN exchange rate and conversion: converts an amount of USD into MXN at the latest European Central Bank reference rate (frankfurter.app, updated every business day), returning the rate, the converted value and the rate date. USD/MXN pricing for invoices, checkout and reporting, no API key. $0.01 per call.

Decode JWT: paste a JSON Web Token and get the decoded header, payload claims, human-readable iat/exp/nbf times, expired or not-yet-valid status, seconds until expiry and security warnings such as alg=none. No signature verification, nothing stored. $0.01 per token.

Free Biography & Autobiography audiobooks: public-domain recordings in LibriVox's "Biography & Autobiography" genre (873 titles and growing) with runtime, language and direct mp3 zip / RSS / archive.org links, plus matching audio from Internet Archive. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Free Children's Fiction audiobooks: public-domain recordings in LibriVox's "Children's Fiction" genre (626 titles and growing) with runtime, language and direct mp3 zip / RSS / archive.org links, plus matching audio from Internet Archive. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Free Humorous Fiction audiobooks: public-domain recordings in LibriVox's "Humorous Fiction" genre (648 titles and growing) with runtime, language and direct mp3 zip / RSS / archive.org links, plus matching audio from Internet Archive. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Country facts: official name, ISO codes, capital, region, population, area, currencies, languages, calling code, top-level domain, timezones, neighbours and flag, from the free REST Countries API. $0.01 per lookup.

Cryptocurrency price: current USD price, 24h change, market cap and 24h volume for a coin by id or symbol (bitcoin, ethereum, solana, usdc and 100+ others) from CoinGecko's free API. $0.01 per lookup.

Country calling code: the international dial prefix for a country by name or ISO code, with the ISO codes and an example E.164 format. Phone formatting and validation helper. $0.01 per lookup.

Docker Hub image info: description, pull count, star count, last updated, and the 10 most recent tags with sizes and dates, from Docker Hub's public API. Container supply-chain research. $0.01 per image.

MIME type lookup both ways: extension or filename to content type, or content type to extensions, for 80 common web, image, audio, video, font, document and archive formats, with a category. $0.01 per lookup.

Convert webpage to markdown: fetch any URL and return clean Markdown for LLMs and agents, with title, meta description, headings outline, word count, links and images. Navigation, ads, scripts and boilerplate are stripped, keeping the main article content. No API key. $0.01 per page.

Free Christianity - Other audiobooks: public-domain recordings in LibriVox's "Christianity - Other" genre (667 titles and growing) with runtime, language and direct mp3 zip / RSS / archive.org links, plus matching audio from Internet Archive. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Postal / ZIP code format check: the expected pattern and an example for 30 countries, and whether a given code matches it. Address validation without an address API. $0.01 per check.

Unix timestamp converter: seconds or milliseconds to ISO 8601, RFC 2822, weekday and relative time; or any ISO/date string to Unix seconds and milliseconds. Auto-detects the input. $0.01 per call.

did:web resolver: converts a did:web identifier (or domain) to its DID document URL (/.well-known/did.json or /path/did.json), fetches it and returns the id, controller, verification methods (id, type, public key kind), authentication/assertion references, services, and whether the document id matches the DID. Decentralised-identity checks for agent-to-agent trust. $0.01 per DID.

Fediverse NodeInfo for a server: follows /.well-known/nodeinfo to the newest schema and returns software name and version, supported protocols (activitypub…), total/active-month/active-half-year users, local posts, open registrations, and the server's inbound/outbound services. Instance vetting and federation research. $0.01 per server.

Free Crime & Mystery Fiction audiobooks: public-domain recordings in LibriVox's "Crime & Mystery Fiction" genre (474 titles and growing) with runtime, language and direct mp3 zip / RSS / archive.org links, plus matching audio from Internet Archive. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Free General Fiction audiobooks: public-domain recordings in LibriVox's "General Fiction" genre (1166 titles and growing) with runtime, language and direct mp3 zip / RSS / archive.org links, plus matching audio from Internet Archive. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Free Historical Fiction audiobooks: public-domain recordings in LibriVox's "Historical Fiction" genre (916 titles and growing) with runtime, language and direct mp3 zip / RSS / archive.org links, plus matching audio from Internet Archive. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

x402 probe: requests a URL without paying and decodes its 402 payment terms: x402 version, accepted schemes and networks (CAIP-2), price in USDC (atomic and human), payTo address, asset contract, max timeout, resource description, and whether the terms came from the PAYMENT-REQUIRED header or the JSON body. Tells an agent exactly what a paid API costs before it commits. $0.01 per probe.

DNS CAA record lookup: which certificate authorities are allowed to issue TLS certificates for a domain (issue, issuewild, iodef), parsed. Certificate policy audits and issuance troubleshooting. $0.01 per lookup.

DNS propagation check: resolves a domain's A and MX records through three independent public resolvers (Cloudflare 1.1.1.1, Google 8.8.8.8, Quad9) and reports whether all agree. Verify a DNS change has propagated after a migration or record update. $0.01 per domain.

Domain trust and legitimacy score 0-100 with the reasons: domain age, DNS and mail hygiene (MX, SPF, DMARC), live HTTPS homepage, metadata quality, social presence, robots and sitemap. One number to rank, filter or flag domains for fraud screening, vendor vetting and lead scoring. $0.01 per domain.

Email provider detection for an address or domain: consumer webmail (Gmail, Outlook.com, Yahoo, iCloud, Proton...) versus business hosting (Google Workspace, Microsoft 365, Zoho, Proofpoint...) from the domain and its MX records. Segment contacts and pick the right deliverability playbook. $0.01 per address.

Free History audiobooks: public-domain recordings in LibriVox's "History" genre (553 titles and growing) with runtime, language and direct mp3 zip / RSS / archive.org links, plus matching audio from Internet Archive. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

IP WHOIS via RDAP: the registered netblock for an address with its name, handle, allocation type, country, start and end addresses and the owning organization, from the authoritative regional registry. Ownership research and abuse contacts. $0.01 per IP.

Free public-domain books on "London (England)": browse the catalogue's works tagged with that Library of Congress subject (659 in Project Gutenberg alone, plus Internet Archive scans), ranked by relevance and popularity, with direct epub/txt/html download links. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Free public-domain books on "Love stories": browse the catalogue's works tagged with that Library of Congress subject (986 in Project Gutenberg alone, plus Internet Archive scans), ranked by relevance and popularity, with direct epub/txt/html download links. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Free public-domain books on "Man-woman relationships": browse the catalogue's works tagged with that Library of Congress subject (1,129 in Project Gutenberg alone, plus Internet Archive scans), ranked by relevance and popularity, with direct epub/txt/html download links. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Free public-domain books on "Marriage": browse the catalogue's works tagged with that Library of Congress subject (284 in Project Gutenberg alone, plus Internet Archive scans), ranked by relevance and popularity, with direct epub/txt/html download links. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

Free public-domain books on "Married people": browse the catalogue's works tagged with that Library of Congress subject (211 in Project Gutenberg alone, plus Internet Archive scans), ranked by relevance and popularity, with direct epub/txt/html download links. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.