Every agent-payable API.

Unpaywall open-access lookup by DOI (free API; it requires a contact e-mail set in UNPAYWALL_EMAIL, not a key): is the paper open access, OA status, best free full-text link, journal and publisher. Returns metadata and links only, not the PDF.

DataCite DOI search (public REST API, no key): DOI, title, publication year, resource type, publisher, creators and landing page for datasets, software and other research outputs. Metadata only.

Reports whether Shodan's pre-collected passive scan data shows SNMP (UDP port 161) seen open on an IPv4 address. Passive and possibly old; no community string is tried, so default or public community access is not tested.

Lists the data breaches HaveIBeenPwned has recorded for a domain (breach name, breach date, accounts affected, data types exposed, verified flag). It is the public breach catalogue, not a check of individual email addresses (that needs a paid key and is not offered here).

Checks a certificate SHA-1 fingerprint (40 hex characters) against the abuse.ch SSL Blacklist of certificates seen on malware botnet C2 servers. A hit returns the date added and the malware reason from the list. Only certificates this list tracks are covered.

Latest Benzinga financial news (the public JSON feed behind benzinga.com): headline, teaser, author, time, URL, tickers, channels and tags. Filter by stock tickers (e.g. AAPL,TSLA) and/or words in the headline/teaser. Newest first, up to 100 stories; no paging into older news, no full article text. Public, no key.

On-page SEO audit of one public page from its HTML only: title and description length, one H1, canonical link, language, viewport, robots meta, Open Graph tags, images without alt text, internal and external links, word count. Returns each check with its value and pass or fail. No Core Web Vitals, backlinks or keyword volumes.

Subdomain names found in public Certificate Transparency logs for a domain (via CertSpotter): unique host names and wildcard names, issuers, latest issue date and how many listed certificates are still valid. Returns the first page only (up to 100 certificates) and lists at most 100 names; wildcard names are shown as *.domain.

EPSS (Exploit Prediction Scoring System) for one CVE from FIRST's public API: the estimated probability (0 to 1) of exploitation in the next 30 days, its percentile among all scored CVEs and the scoring date. EPSS predicts; it does not say an exploit exists (see cisa-known-exploits).

ShanghaiRanking ARWU 2026 world university ranking (public table on shanghairanking.com, no key): world position, institution, national rank, total score and the six indicator scores (Alumni, Award, HiCi, N&S, PUB, PCP). The public page shows the top 30 only.

Reads the DKIM public key published at <selector>._domainkey.<domain>: key type, whether it is revoked (empty p=), decoded key size in bytes and a strength hint (about 1024-bit vs 2048-bit RSA), and basic syntax (v=DKIM1). Follows one CNAME, which large providers use. Does not check a signed message.

Reports whether Shodan's pre-collected passive scan data shows NTP (port 123) seen open on an IPv4 address. Passive and possibly old; the monlist amplification check itself is not run, so this cannot say whether monlist is enabled.

For an autonomous system (e.g. AS13335): how many upstream (transit) and downstream neighbours RIPEstat sees in BGP, the top upstreams ranked by 'power' with their IPv4 and IPv6 peer counts, and the top downstreams. Built from RIS route collector paths, so it is an observed view, not the contract.

Censys host view for an IPv4 address: the services, ports and protocols Censys has observed on it with their last scan time and detected software, plus autonomous system, location, network owner and reverse DNS, from the Censys Platform API.

Public product metadata of a Shopify store from its storefront products.json feed (no key): title, handle, vendor, product type, tags, publish and update times, price range, variant and image counts and product link. Only stores that expose products.json; stores that block it return 404.

Checks an IPv4 address against the Blocklist.de 'all' list of IPs reported for attacks such as failed logins, SSH and mail abuse (about 24,000 addresses). A hit means it was reported recently; the list keeps only current reports.

Spamhaus blocklist check through Spamhaus's official Data Query Service: an IPv4 address against ZEN (SBL spam sources, CSS snowshoe, XBL exploited/botnet hosts, DROP hijacked ranges, PBL end-user ranges) or a domain against the Domain Block List (spam, phishing, malware, botnet C&C, abused legitimate domains). Returns listed yes/no, every return code with the list it means, and Spamhaus's lookup link. Point-in-time answer.

Official World Golf Ranking (OWGR public ranking API, no key): current men's position, player name, country, total points, average points and last week's position for the top players. Current ranking only; no tour or event history.

Checks Shodan's passive scan records for TCP port 445 (SMB) on an IPv4 address. Says whether SMB was seen open and when the record was last refreshed by the host data (not a live test). An address with no Shodan record returns seen=false with known=false; that is not proof the port is closed.

Looks one http or https URL up in the PhishTank phishing database (live checkurl lookup, no key). Returns whether PhishTank has the URL and, if so, its phish id, verification flag and validity. Absence means PhishTank has no record of this exact URL, not that it is safe.

Reads the Content-Security-Policy header of a site's home page and lists weak points: 'unsafe-inline' and 'unsafe-eval' in script sources, bare wildcards, data: or http: script sources, a missing default-src or script-src, and a missing policy altogether. Reports directives. Header only; a CSP in a meta tag is not read.

NHS England primary-care prescribing for a drug (official NHSBSA English Prescribing Dataset, monthly, ~2 months behind; the raw data behind OpenPrescribing.net): items, actual cost (GBP) and quantity, grouped by region, ICB, GP practice or product presentation, largest first. Match on BNF chemical substance or presentation name. Open Government Licence, no key.

USDA AMS Market News (official MyMarketNews API): search the catalogue of livestock, grain, dairy, fruit/vegetable and other market reports by title, or pass a report slug id to get its latest published rows (prices, volumes, report date). Data straight from USDA; needs the owner's free MARS API key.

Checks a domain against SURBL's multi-list (multi.surbl.org): whether it appears in spam or phishing URI lists. Listed domains return a 127.0.0.x code. Not listed means not in SURBL's current lists, not that the domain is safe.

One Hacker News item by numeric id from the official HN API (Firebase, public, no key): type, title, author, time, score, comment count, link and plain text. Deleted or unknown ids return 404.

Looks up a file hash (SHA-256, SHA-1 or MD5) in abuse.ch MalwareBazaar: whether the sample is known, its other hashes, file name, type, size, signature (malware family), first/last seen, reporter, origin country, delivery method, tags, download count and code-signing info. Metadata only; the sample itself is never downloaded.

For a domain's current certificate (taken from public Certificate Transparency data via CertSpotter): reads its CRL Distribution Point, downloads that public CRL, and reports whether the certificate's serial number is on it, plus the CRL's thisUpdate and nextUpdate. OCSP is not queried. Revocation status is as of the CRL's publication time.

Checks Shodan's passive scan records for TCP port 3389 (RDP) on an IPv4 address. Says whether RDP was seen open (not a live test, and the record can be days old). An address with no Shodan record returns seen=false with known=false; that is not proof the port is closed.

IPv4 or IPv6 address → covering BGP prefix, origin AS number and holder name, whether the prefix is announced, and a coarse country and map point, all from RIPEstat. Location is an estimate (a block-level database), not a street address; the city is often empty.

MangaDex manga search by title (public API, no key): id, title, year, publication status, content rating, genre tags, last chapter and page link. Metadata only; no chapter pages.

Looks up one MITRE ATT&CK technique (e.g. T1059 or T1059.001) on its official public page: its name, the tactic-level summary text and the page title. Reads one page per call; it does not return the whole matrix or a technique's sub-techniques list.

Checks whether a host (domain or IP) is known to abuse.ch URLhaus as a malware distribution host: first seen, number of malware URLs, Spamhaus DBL / SURBL status and the latest URLs with status (online/offline), threat type, tags, reporter and URLhaus reference.

Searches abuse.ch ThreatFox for indicators of compromise matching a term (IP, IP:port, domain, URL or file hash): IOC, type, malware family, threat type, confidence, first/last seen, reporter, tags and Malpedia link. Optional exact match and a first-seen window in days.

Reports which newer HTTP protocols a site advertises: HTTP/3 (h3) and older draft or HTTP/2 alternatives in its Alt-Svc response header, and the Alt-Svc max-age. This is what the server announces, not a TLS ALPN negotiation: the fetch this tool makes cannot choose the protocol, so a site that negotiates but does not send Alt-Svc will show as not advertised.

PubMed article metadata by PMID (NCBI E-utilities esummary, public, no key): title, journal, publication date, authors and DOI for up to 20 ids. Summary fields only, no abstracts.

Top 50 dapps from DappRadar's public rankings page: rank, name, token symbol, chains, market cap, token price, price change, trading volume, unique active wallets (UAW) and TVL, for 24h/7d/30d, optionally for one chain (eth, solana, bnb, base, polygon, arbitrum, tron...). Values in USD as shown by DappRadar; missing values are null. Public page, no key.

Checks an IPv4 address against the public X4BNet list of commercial VPN provider address ranges (about 11,000 CIDR blocks, refreshed by the list's maintainer). Returns whether the address falls in a listed VPN range and which range. A miss does not prove a direct connection, and IPv6 is not covered.

Decodes a JWT you supply (header and payload, base64url JSON) and reports its algorithm, key id, claims, and time checks (exp, nbf, iat). Flags alg none, symmetric HS algorithms, missing exp and a jku/x5u key reference. It does not verify the signature, because no key is given, and it does not fetch the key URL.

DNS records of a domain (A, AAAA, MX, NS, TXT, CNAME, CAA, SOA) resolved live through the public AdGuard DNS JSON resolver (NextDNS as backup). Shows answers as they resolve now, with TTLs; it does not walk the delegation chain or query the authoritative servers directly.

npm registry search for MCP servers that convert Markdown to PDF (public npm search API, no key): package name, version, description, publisher, last publish date, monthly and weekly downloads, and npm link. Lists packages as npm reports them; quality is not checked.

Checks an IPv4 address against the Tor Project's bulk exit list (about 1,200 active exit IPs). If it is an exit, adds the relays for that address from Onionoo: nickname, flags, country, first and last seen. Only exit IPs are on the list; a relay's other IPs are not checked.

AbuseIPDB reputation for an IPv4 address over the last 90 days: abuse confidence score (0-100), number of abuse reports, last report date, ISP, usage type and country. Needs a free AbuseIPDB key configured by the operator; reports are crowd-sourced.

CWTS Leiden Ranking Open Edition 2025 (publication-based, about 2,800 universities, OpenAlex data): for a country or continent, field and period (2006-2009 to 2020-2023), each university's rank, name, country and the indicators of the chosen dimension: scientific impact (P, top 1%), collaboration (international, industry) or open access (P(OA), PP(OA)).

GreyNoise Community lookup for an IPv4 address: whether it was seen mass-scanning the internet recently (noise), whether it is a known benign service (riot), its classification (benign, malicious, unknown), name and last-seen date. An address GreyNoise has not seen returns noise=false with a message; it is not a clean verdict.

WeChat Official Account (公众号) articles matching a query, from Sogou WeChat search (weixin.sogou.com): title, summary, account name, publish time and link, 10 per page. Links are Sogou redirect links that open the mp.weixin.qq.com article in a browser. Sogou may show a captcha under heavy use; that returns 503.

For an IPv4 prefix (e.g. 8.8.8.0/24): the origin AS seen announcing it now across RIPE RIS peers, its RPKI status for that origin (valid, invalid or unknown), route objects, visibility, and how many more-specific and less-specific prefixes are seen. An 'invalid' RPKI status is a hijack warning sign; it is not proof of a hijack.

One CVE record from the NIST National Vulnerability Database: description, published and last-modified dates, NVD status, primary CVSS score and severity (v4.0, 3.1, 3.0 or 2.0, whichever NVD marks primary first), CWE weakness IDs and up to 5 reference URLs. It does not say whether the CVE is being exploited (use cisa-known-exploits or epss-exploit-score for that).

Maps an IPv4 address to its origin AS number, the BGP prefix that covers it, the country, the registry and the allocation date, using Team Cymru's public IP-to-ASN DNS service. Returns no origin when Cymru has no mapping for the address.

Checks whether an email address's domain (or a domain you give) is on the community disposable and temporary email blocklist (about 9,900 domains). Only the domain is checked, never the mailbox, and a domain missing from the list is not proven to be permanent.

Lists the CAA (Certification Authority Authorization) records published on a domain: which CAs may issue certificates (issue), wildcard certificates (issuewild) and the incident-report address (iodef). Shows the records on the exact name only; CAA is inherited from parent domains when a name has none, which this tool does not walk.