Is a specific bot allowed to fetch a URL? Fetches the site's robots.txt and evaluates the path for the named user-agent (GPTBot, ClaudeBot, Googlebot, Bingbot, CCBot, PerplexityBot or any token), returning allowed/disallowed, the matching rule and group, crawl-delay, and whether the bot has a dedicated group or falls back to *. Pre-flight for compliant scraping agents. $0.01 per check.

Semantic-version helper: compare two versions (-1/0/1 with which is newer), test whether a version satisfies a range (^, ~, >=, <, x-ranges, hyphen ranges, ||), or sort a comma/space list of versions descending with prerelease handling. Parses major/minor/patch/prerelease/build. $0.01 per operation.

Sitemap validator: fetches a sitemap or index, checks well-formedness, namespace, type (urlset/sitemapindex), counts entries, validates loc URLs (absolute, same host, no duplicates), lastmod formats, changefreq/priority values, the 50,000-URL and 50 MB limits, gzip, and lists the first errors. Returns valid true/false with error and warning lists. $0.01 per sitemap.

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.

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.

TOML to JSON converter: tables, nested dotted keys, arrays of tables [[x]], inline tables, arrays, strings (basic, literal, multi-line), integers with underscores, floats, booleans and dates (kept as strings). Reads Cargo.toml, pyproject.toml, wrangler.toml and similar configs. $0.01 per conversion.

WebFinger lookup (RFC 7033): resolves acct:user@domain or a resource URI via /.well-known/webfinger and returns the subject, aliases, and links (ActivityPub actor, profile page, avatar, OIDC issuer, remote-follow template). Identity resolution for fediverse and decentralised-auth agents. $0.01 per lookup.

OpenID Connect discovery for an issuer: fetches /.well-known/openid-configuration and summarises issuer, authorization/token/userinfo/jwks/end-session/registration endpoints, supported scopes, response types, grant types, PKCE methods, signing algorithms, claims and subject types. Integration pre-check for auth agents. $0.01 per issuer.

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.

Search the x402 Bazaar (Coinbase CDP discovery index) for paid APIs other agents sell: full-text/semantic query returning up to 20 resources with URL, description, price in USDC, network, payTo, scheme, last-updated and input hints. Optional network filter after a pipe. Lets an agent find a capability to buy in one call. $0.01 per search.

XML to JSON converter producing an element tree ({name, attrs, text, children}) that preserves order, attributes, CDATA and repeated elements, plus the element count. Handles up to 5,000 elements. Sitemaps, feeds, SOAP bodies and config files. $0.01 per conversion.

YAML to JSON converter for block-style YAML (nested maps, lists, scalars with type inference, quoted strings, comments, literal | and folded > blocks, inline JSON arrays/objects). Returns the parsed JSON and the top-level keys. Ideal for reading CI configs, Kubernetes manifests and docker-compose files. Anchors/aliases and multi-document files are not supported. $0.01 per conversion.

Disposable / temporary email detection: is this address or domain a throwaway (Mailinator, Guerrilla Mail, 10minutemail, YOPmail...), a free webmail provider (Gmail, Outlook...), or a role address (info@, admin@)? Includes MX presence and a deliverability verdict. Signup fraud prevention and list hygiene. $0.01 per address.

DNS lookup for any domain in one call: A records (IPv4), MX records with priority, all TXT records, the inferred mail provider, and whether SPF and DMARC records exist. Fast DNS-over-HTTPS resolution, JSON output, no API key. Useful for domain research, email routing checks and infrastructure discovery. $0.01 per lookup.

DNS A record lookup: resolve a domain name to its IPv4 addresses with TTL, record count, DNSSEC validation flag and response code, via DNS-over-HTTPS. Fast, no API key. $0.01 per lookup.

DNS AAAA record lookup: resolve a domain name to its IPv6 addresses with TTL and DNSSEC validation flag. Tells you whether a site is reachable over IPv6. $0.01 per lookup.

All common DNS records for a domain in one call: A, AAAA, MX, TXT, NS, SOA, CNAME, CAA and HTTPS, plus DNSSEC validation state. A complete DNS snapshot for audits, migrations and change tracking. $0.01 per domain.

IP blacklist (DNSBL) check: is an IPv4 address listed on Spamhaus ZEN, SpamCop, Barracuda, SORBS, UCEPROTECT or PSBL? Returns each listing with its return codes. Mail-server reputation and abuse triage. $0.01 per IP.

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 CNAME record lookup for a hostname: the alias target chain, TTL, and a dangling-CNAME check (target does not resolve, a subdomain-takeover risk indicator). Asset inventory and security hygiene. $0.01 per lookup.

DKIM selector scan: tests 50 common DKIM selectors (Google, Microsoft 365, Mailchimp, SendGrid, Amazon SES, Postmark, HubSpot, Zoho, Proton, Fastmail and more) and reports every published key with its type and estimated strength. Find out which email services a domain signs mail with. $0.01 per domain.

DMARC record parser and validator: paste any DMARC TXT string and get the policy, subdomain policy, percentage, report addresses, alignment modes, whether it enforces, and warnings for common mistakes (p=none, missing rua, pct under 100, unknown tags). $0.01 per record.

DNSSEC check for a domain: whether DS and DNSKEY records exist, whether the resolver validates the chain (AD flag), signing algorithms used. Security posture and DNS hygiene audits. $0.01 per check.

DNS HTTPS/SVCB record lookup: service binding records that advertise HTTP/3 and HTTP/2 (ALPN), ECH and IP hints for a domain. Shows whether a site supports HTTP/3 at the DNS level. $0.01 per lookup.

IDN / punycode converter and homograph check: converts between Unicode and ASCII (xn--) domain forms, lists the scripts used, flags mixed-script labels and confusable characters (Cyrillic а vs Latin a) that indicate homograph phishing risk. $0.01 per domain.

Mail provider detection for a domain: the primary inbound provider from MX (Google Workspace, Microsoft 365, Proofpoint, Zoho, Proton, iCloud, GoDaddy, IONOS...) and the sending services authorised in SPF (SendGrid, Mailchimp, Salesforce, Zendesk, HubSpot, Marketo...). Vendor intelligence and deliverability context. $0.01 per domain.

DNS MX record lookup: the mail exchanger hosts and priorities for a domain, TTL, plus the detected mail provider (Google, Microsoft 365, Proofpoint, Zoho...). Email routing and provider identification. $0.01 per lookup.

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.

DNS NS record lookup: the authoritative nameservers for a domain and the detected DNS hosting provider (Cloudflare, Route 53, Google Cloud DNS, Azure, NS1, GoDaddy, Namecheap...). Infrastructure discovery and migration checks. $0.01 per lookup.

DNS hosting provider detection: who hosts a domain's DNS (Cloudflare, AWS Route 53, Google Cloud DNS, Azure, NS1, GoDaddy, Namecheap, DNSimple, Hurricane Electric, Vercel...) from its nameservers, including multi-provider setups. Infrastructure research and migration planning. $0.01 per domain.

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.

Reverse DNS (PTR) lookup: the hostname for an IPv4 or IPv6 address, with the arpa name and TTL. Identify servers, mail hosts and hosting providers from an IP. $0.01 per lookup.

DNS SOA record lookup: zone start-of-authority with primary nameserver, admin contact email, serial number and refresh/retry/expire/minimum timers, parsed into JSON. Zone health and change detection (serial). $0.01 per lookup.

SPF flattener: recursively expands a domain's SPF includes and redirects into the final list of authorised IPv4/IPv6 ranges and returns a flattened record. Fix the 10-lookup limit or audit exactly which networks may send mail as the domain. $0.01 per domain.

DNS SRV record lookup: service records (SIP, XMPP, LDAP, Minecraft, Kerberos and others) with priority, weight, port and target host, parsed. Service discovery for a domain. $0.01 per lookup.

TLD information: the registry's RDAP server from the IANA bootstrap file, whether the TLD zone is DNSSEC-signed, and its nameserver count. Understand any domain extension before registering or investigating. $0.01 per TLD.

DNS TTL audit: the cache time-to-live for A, AAAA, MX, NS and TXT records with plain-English notes on which are too high for a safe migration and which are unusually low. Plan DNS cutovers with confidence. $0.01 per domain.

DNS TXT record lookup: all TXT records for a domain (SPF, site-verification tokens for Google, Microsoft, Apple, Facebook, Stripe, Atlassian and others), with TTL. Reveals which SaaS services a company has verified. $0.01 per lookup.

Which SaaS vendors a company uses, from DNS TXT verification tokens: Google Workspace, Microsoft 365, Apple, Facebook, Atlassian, Stripe, DocuSign, Adobe, Zoom, Slack, HubSpot, Salesforce, Shopify, OpenAI, Anthropic, Tailscale and more. Sales intelligence and tech-stack research without touching the website. $0.01 per domain.

Typosquat finder: generates the most likely typo, transposition, omission, doubled-letter, homoglyph and TLD-swap variants of a domain (up to 40) and checks which ones currently resolve. Brand protection and phishing-domain monitoring. $0.01 per domain.

Wildcard DNS check: resolves a random non-existent subdomain to see whether the zone answers everything (wildcard record), which affects subdomain enumeration, email catch-all behaviour and phishing risk. $0.01 per domain.

DNS change detection: snapshots a domain's A, AAAA, MX, NS, TXT and CAA records, compares with the snapshot from your previous call (kept 90 days) and reports which record types changed. Call it on a schedule to get DNS hijack and misconfiguration alerts. $0.01 per check.

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.

Domain intelligence and website lookup in one JSON call: WHOIS/RDAP registration date, registrar and expiry; DNS records (A, MX, TXT), mail provider detection, SPF and DMARC email security check; website technology and CMS detection (tech stack); homepage title, meta description, OpenGraph, language, social profiles, contact emails; HTTP status, redirect chain, HTTPS/HSTS, robots.txt, sitemap; plus a 0-100 trust/reputation score for lead enrichment, vetting and research. $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 security check for a domain: SPF record present and its content, DMARC record and policy (none / quarantine / reject), MX records and mail provider. Tells you whether a domain is protected against spoofing and phishing. Email authentication audit, vendor vetting, deliverability troubleshooting. $0.01 per domain.

Email address and email domain verification: syntax check, DNS MX and A records, mail provider detection (Google Workspace, Microsoft 365, ...), disposable/temporary email domain detection, role address detection (info@, admin@, support@), free webmail provider flag, plus-tag detection, SPF and DMARC presence, and a deliverable verdict (likely / risky / no) with the reason. Email validation and list cleaning for signups, CRM and lead qualification. $0.01 per address.

BIMI record check for a domain: whether a Brand Indicators for Message Identification record exists at default._bimi, the SVG logo URL and the VMC certificate URL. Email branding readiness check. $0.01 per domain.

Catch-all mailbox hint (no SMTP probing): estimates whether a domain accepts mail to any address, from provider defaults (Google Workspace/Microsoft 365 usually reject unknown users; many small hosts and Cloudflare Email Routing accept all), wildcard DNS and MX shape. Helps interpret 'deliverable: likely' results. $0.01 per domain.

Email authentication and deliverability report for a domain in one call: SPF (with -all check), DMARC policy strength, DKIM presence across common selectors, MTA-STS, BIMI and MX, combined into a 0-100 score with an A-F grade and plain-English findings. Vendor vetting and sender-setup audits. $0.01 per domain.