{"uid":"cap_an5ewg5kEW7wF-x_3NLxx","slug":"http-3-modern-transport-protocol-checker-8b748017","name":"HTTP/3 & Modern Transport Protocol Checker","description":"HTTP/3 and modern-transport support: checks the DNS HTTPS record (alpn, ech, ipv4hint), the Alt-Svc response header for h3, and reports whether HTTP/3 (QUIC), HTTP/2 and Encrypted Client Hello are advertised. Useful for protocol-compatibility and performance audits. $0.01 per domain.","url":"https://intel.rallylive.ca/monitor/http3","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_9_xSxPDy7vX5UXjaoqWbZ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks a domain for HTTP/3 (QUIC), HTTP/2, and Encrypted Client Hello (ECH) support by inspecting DNS HTTPS records (ALPN, ECH, IP hints) and the Alt-Svc response header.","exampleAgentPrompt":"Can you check whether cloudflare.com supports HTTP/3 and Encrypted Client Hello — I want to see what's in its DNS HTTPS record and Alt-Svc header?","exampleUseCases":[{"title":"Pre-migration protocol compatibility audit","prompt":"Before we migrate our CDN, can you check if example.com currently advertises HTTP/3 via Alt-Svc and whether its DNS HTTPS record has the right ALPN values?"},{"title":"Security audit for ECH adoption","prompt":"I'm reviewing our infrastructure security posture — can you tell me whether api.mycompany.com has Encrypted Client Hello enabled and advertised in its DNS HTTPS record?"},{"title":"Competitor performance benchmarking","prompt":"I want to benchmark protocol modernity — can you check if shopify.com supports HTTP/3 and QUIC, and what its ALPN and IPv4 hint entries look like?"}],"resultDescription":"Returns a structured report indicating whether the domain advertises HTTP/3 (QUIC) and HTTP/2 support, details from the DNS HTTPS record (including ALPN values, ECH parameters, and IPv4 hints), and the Alt-Svc response header contents showing h3 advertisement status.","failureModes":["Domain does not exist or fails DNS resolution — no results returned","Domain does not have a DNS HTTPS record — ALPN and ECH fields will be absent or null","Alt-Svc header not present on the domain's HTTP response — h3 advertisement not detectable","Network timeout reaching the target domain — error response","Invalid domain format provided — request rejected"],"whenToPreferThis":"Choose this endpoint when you need to specifically audit HTTP/3 (QUIC) and ECH readiness for a domain, combining both DNS HTTPS record inspection and Alt-Svc header analysis in a single call. Prefer this over generic DNS lookup endpoints when you need protocol-layer and transport-layer details together, especially for performance or security auditing workflows.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T13:10:51.366Z","isFirstParty":false}