Developer tools

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.

Feed freshness: fetches an RSS/Atom feed (auto-discovers it from a page URL if needed), returns the newest item's title, link and age in hours, item count, average posting interval over the feed, and whether the feed looks stale (no item in 30 days). Also reports items new since your previous call (kept 90 days). $0.01 per check.

Direct dependencies of an npm package's latest (or given) version: the dependencies, peerDependencies and optionalDependencies with their ranges, counts of each, plus the engines field and whether the package has install scripts. One-hop supply-chain view. $0.01 per package.

SQL formatter: upper-cases keywords, breaks the statement into SELECT/FROM/JOIN/WHERE/GROUP BY/ORDER BY clauses, one column per line, indents AND/OR, and reports the statement type, tables referenced and whether it looks like a write (INSERT/UPDATE/DELETE/DROP). Works on most ANSI SQL dialects. $0.01 per statement.

License of a GitHub repository: SPDX id, full name, license file path, permissive/copyleft class, plus the license's permissions, conditions and limitations lists from GitHub's license metadata. Compliance check before vendoring code. $0.01 per repo.

Regex tester: runs a JavaScript regular expression (pattern or /pattern/flags) against your text with the global flag, returning every match with index, the capture groups and named groups, the match count, and a 2-second timeout guard against catastrophic patterns. Text is not stored. $0.01 per test.

Cron expression explained in plain English with the next 5 run times (UTC): validates the 5-field syntax, expands ranges, steps and names (mon-fri, jan-dec). Debug schedules before deploying them. $0.01 per expression.

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.

Bulk domain expiry for up to 20 domains in one call: expiry date, days left, registrar and at-risk status per domain, sorted soonest-first, with a count of domains expiring within 30 and 90 days. Portfolio renewal sweeps for agents managing many domains. $0.01 per batch.

www vs apex check: fetches both https://domain/ and https://www.domain/ (and the http:// variants), reports which one is canonical, whether the other redirects to it, status of each, and any inconsistencies such as one host failing, both serving 200 without redirect (duplicate content), or an http variant not upgrading. $0.01 per domain.

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.

Status page finder: probes status.<domain>, <domain>/status, <domain>status.com and common hosted providers (Statuspage, Instatus, Better Stack, Hund) for a public status page, and when found reports the provider, the overall indicator (none/minor/major/critical when the provider exposes it), and active incidents. Vendor-health checks for agents. $0.01 per domain.

License and provenance of an npm package: SPDX license of the latest version, whether it is permissive/copyleft/unknown, repository URL, homepage, maintainers (names only), author, funding link, and the license of each direct dependency for a one-hop compliance check. $0.01 per package.

Common ports scan: TCP-connects to 12 well-known ports (FTP 21, SSH 22, SMTP 25, HTTP 80, HTTPS 443, MySQL 3306, Postgres 5432, Redis 6379, 8080, 8443, Elasticsearch 9200, MongoDB 27017) and reports which are open. Quick exposure check for a host you operate. Cloudflare-fronted hosts cannot be probed. $0.01 per host.

Sitemap freshness: loads the site's sitemap (index expanded, up to 5 child maps), counts URLs, finds the newest and oldest lastmod dates, how many URLs changed in the last 7 and 30 days, and, when called repeatedly, how many URLs were added or removed since your previous call (kept 90 days). Content-velocity monitoring for competitors and clients. $0.01 per check.

Latest GitHub release of a repository: tag, name, published date, days ago, prerelease flag, author, first 600 chars of the release notes, and the downloadable assets (name, size, download count, URL). Falls back to the newest tag when a repo has no releases. $0.01 per repo.

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.

Language breakdown of a GitHub repository: bytes and percentage per language sorted by share, primary language, total bytes, language count, plus repo size and default branch. Tech-stack detection for due diligence and tooling decisions. $0.01 per repo.

jsDelivr CDN usage of an npm package over the last month: total hits, rank, bandwidth, daily hit series (last 14 days) and the top 10 versions by hits with their share. A popularity signal independent of npm download counts. $0.01 per package.

Subject Alternative Names of the newest certificate for a domain from certificate-transparency logs: every hostname the current cert covers, wildcard flags, issuer, validity window and days left. Reveals sibling services, staging hosts and shared certs. $0.01 per domain.

Cron expression evaluator: the next 10 run times in UTC for a standard 5-field expression (ranges, steps, lists, names like MON/JAN, */5), a plain-English description, and the interval between runs. Optional start time after a pipe. Validate schedules before deploying. $0.01 per expression.

Nameserver health for a domain: every NS hostname resolves to an address, SOA serial and primary, minimum-two-nameserver rule, and whether all nameservers share the same parent (single point of failure). Zone reliability audit. $0.01 per domain.

Is this website up? Checks if a URL is online right now and answers up/down with the HTTP status code, response time in ms, final URL after redirects, server header and, when HTTPS, the TLS certificate expiry. Use it to check if a site is down, monitor availability, or confirm a page loads before scraping. $0.01 per check.

npm package info: latest version and publish date, description, license, homepage, repository, dependency count, weekly downloads, maintainers and total versions, from the public npm registry. Dependency research for agents and CI. $0.01 per package.

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.

When does this domain expire? Returns the domain expiration date, days until expiry, registration date, registrar and status codes from RDAP (the successor to WHOIS), plus flags for renew-soon (under 30 days) and at-risk (pending delete or redemption). Domain expiry check for portfolio monitoring and drop-catching. $0.01 per domain.

Change watch for sitemap freshness: runs the check and compares it with the result from your previous call for the same domain (kept 90 days), returning the current answer, changed true/false, exactly which fields changed with before/after values, and when it was last seen. Call it on a schedule to be told when sitemap freshness changes. $0.01 per check.

Change watch for www apex check: runs the check and compares it with the result from your previous call for the same domain (kept 90 days), returning the current answer, changed true/false, exactly which fields changed with before/after values, and when it was last seen. Call it on a schedule to be told when www vs apex check changes. $0.01 per check.

Change watch for domain expiration date: runs the check and compares it with the result from your previous call for the same domain (kept 90 days), returning the current answer, changed true/false, exactly which fields changed with before/after values, and when it was last seen. Call it on a schedule to be told when when does this domain expire? returns the domain expiration date, days until expiry, registration date, registrar and st changes. $0.01 per check.

Change watch for status page detect: runs the check and compares it with the result from your previous call for the same domain (kept 90 days), returning the current answer, changed true/false, exactly which fields changed with before/after values, and when it was last seen. Call it on a schedule to be told when status page finder changes. $0.01 per check.