{"uid":"cap_dLW7NaknswRP-0MVDBjUf","slug":"synthora-dns-https-svcb-record-resolver-doh-cee50092","name":"SYNTHORA DNS HTTPS/SVCB Record Resolver (DoH)","description":"Returns HTTPS (type 65 / SVCB) records exposing ALPN protocols (h3, h2), IPv4/IPv6 hints and ECH config for a host via Google DoH JSON. A2A use: connection-optimizing and TLS-fingerprinting agents detect HTTP/3 support and encrypted-client-hello readiness before dialing. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.","url":"https://doh-https-svcb-record.hergertsynthora.com/service","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"domain":{"type":"string","description":"domain"}}},"responseSchema":{"type":"json","example":{"ok":true,"niche":"doh-https-svcb-record","result":{"domain":"cloudflare.com","records":[{"ttl":300,"name":"cloudflare.com.","type":65,"value":"1 . alpn=h3,h2 ipv4hint=104.16.132.229,104.16.133.229 ipv6hint=2606:4700::6810:84e5,2606:4700::6810:85e5"}]},"provenance":{"url":"https://dns.google/resolve","source":"DNS HTTPS/SVCB Record Resolver (DoH)"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0015","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.0015/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0015","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0015","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_8S-G-1bf2XhYvYHItoVeU","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0015","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Resolves HTTPS/SVCB DNS records (type 65) for a domain via Google DoH JSON, returning ALPN protocols, IPv4/IPv6 hints, and ECH config","exampleAgentPrompt":"Look up the HTTPS/SVCB DNS records for cloudflare.com and tell me whether it supports HTTP/3 and ECH, and what IPv4 and IPv6 hints it advertises.","exampleUseCases":[{"title":"HTTP/3 support detection before dialing","prompt":"Before my agent connects to api.example.com, check its HTTPS DNS records to see if it advertises h3 or h2 ALPN support and what IP hints it provides."},{"title":"ECH readiness audit for a domain","prompt":"I want to know if stripe.com has Encrypted Client Hello configured — can you pull its SVCB/HTTPS DNS record and check for an ECH config?"},{"title":"Connection optimization for a CDN endpoint","prompt":"Query the HTTPS DNS records for cdn.shopify.com and give me the full ALPN protocol list and IPv4/IPv6 hints so I can optimize how my client dials it."}],"resultDescription":"Returns a JSON object with ok:true, the queried domain, an array of HTTPS/SVCB DNS records each containing TTL, record name, type (65), and a value string showing priority, ALPN protocols (e.g. h3,h2), IPv4 hints, IPv6 hints, and ECH config, plus provenance metadata pointing to Google DoH.","failureModes":["Domain does not have HTTPS/SVCB records — returns empty records array","Invalid or malformed domain name causes query failure","Upstream Google DoH service is unreachable or rate-limits the request","Non-existent domain returns NXDOMAIN with no records","Network timeout from the resolver service"],"whenToPreferThis":"Use this endpoint when an agent needs to determine HTTP/3 (QUIC) or ECH support for a domain before establishing a connection, or when building connection-optimizing logic that reads ALPN and IP hint data from DNS. Prefer this over generic DNS resolvers when you specifically need type-65 HTTPS/SVCB records rather than A, AAAA, or MX records. It is ideal for TLS fingerprinting, pre-connection protocol negotiation, and infrastructure analysis workflows.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:37:24.858Z","isFirstParty":false}