Find an agent your AI can call

• Live · checked Oct 12, 2026x402Developer toolsCommunity listed · unclaimed
  dns-intel-api-production.up.railway.app
  Reverse-DNS lookup for an IP: PTR record plus a best-effort list of other domains hosted on the same IP. (2 paid endpoints on dns-intel-api-production.up.railway.app.)
  2 endpoints
• Live · checked Oct 12, 2026x402Developer toolsCommunity listed · unclaimed
  dns-whois-lookup.underscoredone.com
  Send up to 10 domain names and get back every DNS record type (A, AAAA, MX, CNAME, TXT, NS, PTR, SOA, SRV, CAA, NAPTR, DS, TLSA) plus the full WHOIS registration profile (registrar, dates, contacts, status, nameservers) for each one. URLs…
  1 endpoint
• Live · checked Oct 12, 2026x402Developer toolsCommunity listed · unclaimed
  dns.halowerk.com
  Resolves A, AAAA, MX, NS, TXT, CAA and SOA, reads the WHOIS record of the responsible registry, checks SPF, DMARC and known DKIM selectors, opens a TLS handshake for issuer, validity, chain and SAN list, and collects subdomains from Certif… (11 paid endpoints on dns.halowerk.com.)
  11 endpoints
• Live · checked Oct 12, 2026x402Developer toolsCommunity listed · unclaimed
  dns.use.x402atlas.com
  DNS A record lookup — resolve any hostname or domain to its IPv4 addresses, returned as a clean JSON list. For host resolution, connectivity and uptime checks, IP-reputation enrichment and infrastructure mapping. (6 paid endpoints on dns.use.x402atlas.com.)
  6 endpoints
• Live · checked Oct 12, 2026x402Developer toolsCommunity listed · unclaimed
  dnsdoctor.dev
  One DNS Doctor bulk scan of 2-50 domains in a single call, priced per domain.
  1 endpoint
• Live · checked Oct 12, 2026x402Payments & commerceCommunity listed · unclaimed
  doctor.promoclube.online
  Full paid x402 diagnostic JSON for a target endpoint.
  1 endpoint
• Live · checked Oct 12, 2026x402OtherCommunity listed · unclaimed
  domain-age-checker.underscoredone.com
  Send a list of domain names and this tool tells you exactly how old each one is, when it was first registered, when it expires, and how much time is left before expiration. Great for spotting brand-new suspicious domains, researching compe…
  1 endpoint
• Live · checked Oct 12, 2026x402Developer toolsCommunity listed · unclaimed
  domain-availability-checker.underscoredone.com
  Give this API up to 10 domain names and it tells you whether each has a registration record at the official registry. It uses RDAP, the structured replacement for WHOIS, so there is no free-text parsing. Each domain comes back as 'register…
  1 endpoint
• Live · checked Oct 12, 2026x402Research & dataCommunity listed · unclaimed
  domain.hugen.tokyo
  WHOIS registration lookup — registrar, creation/expiry/updated dates, domain age in days, name servers, DNSSEC, registrant country/org, EPP status codes. All TLDs (.com .net .org .io .dev .ai ccTLDs gTLDs). Per-field error resilience for T… (8 paid endpoints on domain.hugen.tokyo.)
  8 endpoints
• Live · checked Oct 12, 2026x402Developer toolsCommunity listed · unclaimed
  doseplot.com
  Ranked reconstitution suggestions for one published reconstitutable compound: bacteriostatic-water presets that put the published per-administration dose range's clean steps on whole U-100 syringe marks, with doses per vial. Refuses period… (5 paid endpoints on api.doseplot.com.)
  5 endpoints
• Live · checked Oct 12, 2026x402Payments & commerceCommunity listed · unclaimed
  dripmetrics.ai
  DripMetricsAI (api description at https://dripmetrics.ai/) provides on-demand market microstructure and risk metrics for agents and developers. Agents can pay per request via x402 and receive structured JSON metrics without subscriptions o… (11 paid endpoints on api.dripmetrics.ai.)
  11 endpoints
• Live · checked Oct 12, 2026x402Crypto & web3Community listed · unclaimed
  dt0ur.online
  Look up a transaction by hash on base, ethereum, arbitrum, optimism, polygon, bsc: status (success/reverted/pending), block and timestamp, from/to, value, gas used, fee in native coin and USD, method selector, created contract, and decoded… (69 paid endpoints on dt0ur.online.)
  12 endpoints
• Live · checked Oct 12, 2026x402Developer toolsCommunity listed · unclaimed
  duoleads.com
  Encode a WGS-84 latitude and longitude to a geohash at a chosen precision, or decode a geohash back to its bounding box, centre point and error bounds in metres. Encoding also returns the eight neighbouring cells, which is what a caller ne… (33 paid endpoints on api.duoleads.com.)
  12 endpoints
• Live · checked Oct 12, 2026x402OtherCommunity listed · unclaimed
  dwelldata.io
  Entry tier of the multifamily deals feed: every active listing at card level — address, price, units, advertised cap rate, listing URL, freshness — without the computed underwriting or scoring. Same coverage, cheapest way to evaluate the f… (3 paid endpoints on dwelldata.io.)
  3 endpoints
• Live · checked Oct 12, 2026x402ProductivityCommunity listed · unclaimed
  earnings.lonestaroracle.xyz
  Earnings calendar — upcoming report dates, EPS and revenue estimates for up to 30 tickers
  1 endpoint
• Live · checked Oct 12, 2026x402Finance & marketsCommunity listed · unclaimed
  ebay.use.x402atlas.com
  eBay listing detail — one listing by product id: buy options & current bid, variants, shipping to a supported destination, seller reputation, item specifics, stock & watch counts as clean JSON. (3 paid endpoints on ebay.use.x402atlas.com.)
  3 endpoints
• Live · checked Oct 12, 2026x402Finance & marketsCommunity listed · unclaimed
  eckari.com
  Identify which carrier issued a tracking number using a deterministic, versioned signature set - prefixes, lengths, carrier check digits and UPU S10 structure - returning the carrier, how distinctive the match is, every ranked candidate wi… (10 paid endpoints on api.eckari.com.)
  10 endpoints
• Live · checked Oct 12, 2026x402Research & dataCommunity listed · unclaimed
  econdash.org
  EconDash economic data API (M2M) (2 paid endpoints on econdash.org.)
  2 endpoints
• Live · checked Oct 12, 2026x402Finance & marketsCommunity listed · unclaimed
  edgar.openverbs.com
  Resolve a stock ticker symbol or company name to its Central Index Key (CIK) - the identifier every other EDGAR endpoint keys on. Exact ticker matches rank first, then company-name prefix/substring matches. Returns each match's zero-padded… (4 paid endpoints on edgar.openverbs.com.)
  4 endpoints
• Live · checked Oct 12, 2026x402Research & dataCommunity listed · unclaimed
  elements-live.com
  Lab quote: a filter query (+must -exclude "topic" (a OR b) wild* year:a..b) in; matching paper volume by year and research community, and a binding price per deliverable out. (8 paid endpoints on www.elements-live.com.)
  8 endpoints
• Live · checked Oct 12, 2026x402Crypto & web3Community listed · unclaimed
  eltociear-contract-guard.hf.space
  Risk check for an EVM contract/token address
  1 endpoint
• Live · checked Oct 12, 2026x402Research & dataCommunity listed · unclaimed
  eltociear-skill-audit.hf.space
  Fetch a URL and grade its HTTP security headers (HSTS, CSP, X-Frame-Options, etc.) (14 paid endpoints on eltociear-skill-audit.hf.space.)
  12 endpoints
• Live · checked Oct 12, 2026x402ProductivityCommunity listed · unclaimed
  email-auth.use.x402atlas.com
  Email authentication posture check: parses SPF, DMARC and DKIM plus MX for any domain and grades deliverability/anti-spoofing gaps (SPF +all, SPF >10 lookups, DMARC p=none, missing DKIM). Clean JSON for deliverability and security-ops auto…
  1 endpoint
• Live · checked Oct 12, 2026x402ProductivityCommunity listed · unclaimed
  email-verifier.underscoredone.com
  Takes one email address and tells you whether it can actually receive mail. Returns a verdict of valid, invalid, or risky, splits the address into username and domain, and flags free providers and role accounts like admin@ or support@. One…
  1 endpoint
• Live · checked Oct 12, 2026x402ProductivityCommunity listed · unclaimed
  email-verify-api-production-d262.up.railway.app
  Verify a single email: syntax, MX records, SMTP RCPT probe, catch-all, disposable, role-based, free-provider, typo suggestion, 0-100 score, and verdict. (3 paid endpoints on email-verify-api-production-d262.up.railway.app.)
  3 endpoints
• Live · checked Oct 12, 2026x402Research & dataCommunity listed · unclaimed
  embed.gedx402.com
  Rerank documents against a query with BGE Reranker Base (@cf/baai/bge-reranker-base). POST query plus documents[]; returns relevance scores for search and RAG pipelines.
  1 endpoint
• Live · checked Oct 12, 2026x402ProductivityCommunity listed · unclaimed
  energy.lonestaroracle.xyz
  US energy inventory catalyst signal + EIA report calendar (optional ?report=)
  1 endpoint
• Live · checked Oct 12, 2026x402OtherCommunity listed · unclaimed
  energybilltoolkit.co.uk
  Pay-per-use EBT screening endpoint (3 paid endpoints on energybilltoolkit.co.uk.)
  3 endpoints
• Live · checked Oct 12, 2026x402Research & dataCommunity listed · unclaimed
  enrichx402.com
  Exa Search - Neural search across the web
  1 endpoint
• Live · checked Oct 12, 2026x402Crypto & web3Community listed · unclaimed
  ens-resolver.underscoredone.com
  Look up an ENS name or an Ethereum address and get back the matching one, automatically figuring out which direction you need.
  1 endpoint

For agents: /agents.json (paginated; same filters as this page), GET /api/v1/directory?q=, MCP tools search_agents / submit_agent, and the A2A agent at /a2a/directory. Community listings are copied from public registries (the official MCP Registry, the A2A Registry and the x402 Bazaar discovery list) and are unclaimed until their operator proves the domain. Checks are our own automated probes, not a guarantee.