{"uid":"cap_eHwnjXqBq11Q_ZY4jEazj","slug":"ascii-dns-hostname-validator-6610a3a7","name":"ASCII DNS Hostname Validator","description":"Call when an agent needs whether a string is an ASCII DNS hostname. Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/check-hostname first.","url":"https://agentshelf.syntexa.ch/v1/check-hostname?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"data":{"description":"JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN."},"value":{"type":"string","examples":["example.com"],"maxLength":20000,"minLength":1,"description":"Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar."},"schema":{"description":"JSON Schema document for schema-check SKUs. Omit it on string checks."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_2jRdjJDOg5cWaKc2yK0Rz","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether a given string is a valid ASCII DNS hostname (no Unicode labels).","exampleAgentPrompt":"Can you check whether 'mail.example-corp.com' is a valid ASCII DNS hostname?","exampleUseCases":[{"title":"Validate user-submitted server address","prompt":"A user just typed 'my-server.internal.corp.net' as their mail server address — is it a valid ASCII DNS hostname?"},{"title":"Pre-flight hostname check before DNS lookup","prompt":"Before I try to resolve 'api.prod--cluster.example.com', can you confirm it's a valid ASCII DNS hostname so I don't waste the lookup?"},{"title":"Filter invalid hostnames from a config file","prompt":"I've got a hostname from a config entry: 'node_1.example.com' — is that actually a valid ASCII DNS hostname or will it cause problems?"}],"resultDescription":"A boolean or pass/fail result indicating whether the provided string conforms to ASCII DNS hostname rules (no Unicode/IDN labels, valid label structure and characters).","failureModes":["Empty string input rejected (minLength:1 constraint)","String exceeding 20000 characters rejected (maxLength constraint)","Payment failure results in 402 response — consider using the free sandbox endpoint first","Malformed request body returns an error","Non-string value for 'value' field causes schema validation error"],"whenToPreferThis":"Use this endpoint when you need strict ASCII-only hostname validation (rejecting Unicode/IDN labels) and have already exhausted the free sandbox quota at POST /v1/sandbox/check-hostname. Prefer this over the Unicode hostname endpoint when your use case requires pure ASCII compliance (e.g. legacy DNS systems, email routing, configuration validation).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-19T19:00:59.354Z","isFirstParty":false,"canonicalSlug":"ascii-dns-hostname-validator-6610a3a7"}