{"uid":"cap_WckNLNSLV6eq1LIrkBCR8","slug":"domains-rapidruntime-com-check-domain-availability-fd624ea5","name":"Check Domain Availability","description":"Check availability and pricing for specific domain names. Use this before registration to confirm the exact price.","url":"https://domains.rapidruntime.com/api/v1/domains/check-availability","method":"POST","headers":{},"bodySchema":{"type":"object","required":["domainNames"],"properties":{"domainNames":{"type":"array","items":{"type":"string"},"maxItems":50,"minItems":1,"description":"Domain names to check (max 50)"}}},"responseSchema":{"type":"object","required":["results"],"properties":{"results":{"type":"array","items":{"type":"object","required":["domainName"],"properties":{"sld":{"type":"string"},"tld":{"type":"string"},"reason":{"type":"string"},"premium":{"type":"boolean"},"domainName":{"type":"string"},"purchasable":{"type":"boolean"},"purchaseType":{"type":"string"},"renewalPrice":{"type":"number"},"purchasePrice":{"type":"number"}}}}}},"example":{"request":{"domainNames":["testexample.com","testexample.io","testexample.co"]},"response":{"results":[{"sld":"testexample","tld":"com","premium":true,"domainName":"testexample.com","purchasable":true,"purchaseType":"aftermarket_b","renewalPrice":19.99,"purchasePrice":20698.85},{"sld":"testexample","tld":"io","domainName":"testexample.io","purchasable":true,"purchaseType":"registration","renewalPrice":79.99,"purchasePrice":53.99},{"sld":"testexample","tld":"co","domainName":"testexample.co","purchasable":true,"purchaseType":"registration","renewalPrice":48.99,"purchasePrice":17.99}]}},"exampleRequest":{"domainNames":["testexample.com","testexample.io","testexample.co"]},"tags":[],"displayCostAmount":"unknown","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"unknown_unparsed","priceSource":"registry","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":"unknown","summary":"price unknown","primary":{"kind":"unknown","protocol":"mpp","network":"tempo","amountUsd":null,"per":"call","confidence":"unknown"},"accepted":[{"kind":"unknown","protocol":"mpp","network":"tempo","amountUsd":null,"per":"call","confidence":"unknown"}]},"paymentMethods":[{"uid":"pm_iZiOYLK6ZqQ-UsHYi8k3L","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"unknown","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":"domains.rapidruntime.com","brandSlug":"domains-rapidruntime-com-mpp","brandBaseUrl":"https://domains.rapidruntime.com","brandDocsUrl":null,"whatItDoes":"Checks availability and pricing for up to 50 specific domain names before registration","exampleAgentPrompt":"Can you check if 'rapidlaunch.io', 'rapidlaunch.com', and 'rapidlaunch.co' are available to register and what they each cost?","exampleUseCases":[{"title":"Verify startup domain before registration","prompt":"Before I pull the trigger on registering it, can you check if 'novastack.ai' is available and what the purchase and renewal prices are?"},{"title":"Compare pricing across multiple TLDs","prompt":"I'm deciding between 'brightpath.com', 'brightpath.io', and 'brightpath.co' — can you check which ones are available and how much each would cost to register?"},{"title":"Check if rebranded domain is taken","prompt":"We're rebranding to Lunaris and I want to lock in the domain — can you check if 'lunaris.com', 'lunaris.co', and 'lunaris.app' are available and what they'd cost to buy?"}],"resultDescription":"Returns an array of results for each queried domain name, including the domain name, SLD, TLD, whether it is purchasable, the purchase price, renewal price, whether it is a premium domain, and the reason if unavailable.","failureModes":["Empty or missing domainNames array returns validation error","More than 50 domains in the request returns a 400 error","Malformed domain names may return unavailable or error status","Network timeout if the upstream registry is slow to respond","Unknown TLDs may return an unsupported or unavailable result"],"whenToPreferThis":"Use this endpoint when you already know the exact domain names you want to check, especially before calling the registration endpoint to confirm current pricing. For exploratory keyword-based searching across many TLDs, prefer the keyword domain search endpoint instead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:44:03.931Z","isFirstParty":false}