The x-cache response header of a URL: whether it is present, its value, and a one-line reading of what the value means (or the risk of its absence for security headers). One header, one answer, for audits and monitoring scripts. $0.01 per check.

Does a website use Microsoft IIS? Fetches the page (homepage for a bare domain) and matches Microsoft IIS's fingerprints in the HTML and response headers, returning yes/no with the evidence snippet and the category (server). Technographics for sales, competitor research and migration planning, one technology per call. $0.01 per check.

Is TCP port 9300 (Elasticsearch transport) open on a host? Attempts a connection from Cloudflare's edge and reports open/closed/filtered with the connect time; Cloudflare-fronted hosts are reported as inconclusive because their edge answers for them. Exposure checks for Elasticsearch transport without running a scanner. $0.01 per check.

Does a website use Varnish? Fetches the page (homepage for a bare domain) and matches Varnish's fingerprints in the HTML and response headers, returning yes/no with the evidence snippet and the category (cache). Technographics for sales, competitor research and migration planning, one technology per call. $0.01 per check.

Is TCP port 11211 (Memcached) open on a host? Attempts a connection from Cloudflare's edge and reports open/closed/filtered with the connect time; Cloudflare-fronted hosts are reported as inconclusive because their edge answers for them. Exposure checks for Memcached without running a scanner. $0.01 per check.

Does a website use AddThis? Fetches the page (homepage for a bare domain) and matches AddThis's fingerprints in the HTML and response headers, returning yes/no with the evidence snippet and the category (sharing). Technographics for sales, competitor research and migration planning, one technology per call. $0.01 per check.

Change watch for is port 2000 open: runs the check, compares it with the result from your previous call for the same host (kept 90 days) and returns the current answer, changed true/false, the fields that changed with before/after values, and when it was last seen. Schedule it to be alerted when this changes. $0.02 per check.

Change watch for is port 2376 open: runs the check, compares it with the result from your previous call for the same host (kept 90 days) and returns the current answer, changed true/false, the fields that changed with before/after values, and when it was last seen. Schedule it to be alerted when this changes. $0.02 per check.

Is TCP port 8009 (AJP) open on a host? Attempts a connection from Cloudflare's edge and reports open/closed/filtered with the connect time; Cloudflare-fronted hosts are reported as inconclusive because their edge answers for them. Exposure checks for AJP without running a scanner. $0.01 per check.

Retrieve a private mock record by ID for $0.01 Base Sepolia test USDC.

Local time and time zone for Toulouse right now: IANA zone name, UTC offset, whether daylight saving is in effect and when it next changes, and the current local date-time. Meeting scheduling across zones without an API key. $0.01 per call.

MIME type for .bin files: application/octet-stream. Returns the Content-Type to send, the category, whether browsers render it inline, whether it is compressible, common magic bytes and related extensions. Set headers and validate uploads for .bin correctly. $0.01 per call.

Does https://<domain>/apple-touch-icon.png exist? Requests the path and returns the HTTP status, content type, size and the first 300 characters when it is text. Presence of apple-touch-icon.png tells you about the site's tooling and policies. $0.01 per check.

Does a website use Beaver Builder? Fetches the page (homepage for a bare domain) and matches Beaver Builder's fingerprints in the HTML and response headers, returning yes/no with the evidence snippet and the category (page-builder). Technographics for sales, competitor research and migration planning, one technology per call. $0.01 per check.

Does a website use Open Graph tags? Fetches the page (homepage for a bare domain) and matches Open Graph tags's fingerprints in the HTML and response headers, returning yes/no with the evidence snippet and the category (meta). Technographics for sales, competitor research and migration planning, one technology per call. $0.01 per check.

The expect-ct response header of a URL: whether it is present, its value, and a one-line reading of what the value means (or the risk of its absence for security headers). One header, one answer, for audits and monitoring scripts. $0.01 per check.

npm package vite: latest version, description, license, homepage and repository, weekly downloads, dependency count, publish dates and dist-tags from the npm registry. Pin, audit or compare vite in one call, no token. $0.01 per call.

All article meta tags of a page as a name → content map, with a count and a list of expected tags that are missing (for Open Graph/Twitter). One group per call for social-preview and SEO checks. $0.01 per page.

Is this IPv4 address listed on barracuda (b.barracudacentral.org)? Performs the DNSBL query (reversed octets under b.barracudacentral.org, via Cloudflare DoH) and returns listed yes/no with the return codes and, where the list publishes one, the reason text. One list, one precise answer. $0.01 per lookup.

How many <audio> elements does the page have? Fetches the URL and counts audio tags (plus, where relevant, how many have alt/src/href/type attributes), and the page's total element count for scale. Structural audits and template comparisons in one number. $0.01 per page.