{"id":"fbaa2dfe-8a8d-4486-be3e-b183fed8c8b7","shortId":"eAZjRW","kind":"x402","title":"Check if an email domain is disposable, paid per call via x402.","tagline":"Check if an email domain is disposable, paid per call via x402.","description":"The Mailcheck API disposable endpoint checks whether a given domain belongs to a disposable/throwaway email provider. It is part of a broader Mailcheck API hosted at mailcheck.hugen.tokyo that offers six email validation checks: syntax validation, MX record lookup, disposable detection (against 5,000+ known domains), free provider detection, role-based address detection, and typo suggestions.\n\nThis specific endpoint (`/mailcheck/disposable`) accepts a GET request with a `domain` query parameter (e.g., `guerrillamail.com`) and returns a JSON object indicating whether the domain is disposable. The API is documented via an OpenAPI 3.1 spec and includes a Swagger UI at `/docs`. It also exposes an `llms.txt` endpoint for machine-readable API descriptions and an x402 discovery document at `/.well-known/x402`.\n\nNote: During probing, the `/disposable` path at the listed endpoint URL (`https://mailcheck.hugen.tokyo/disposable`) returned HTTP 410 (Gone) on GET and 405 on POST. The OpenAPI spec lists the actual disposable check at `/mailcheck/disposable`, not `/disposable`. The endpoint may have been moved or the listing URL may be incorrect. Pricing details are not available — no x402 402 challenge was captured, and no pricing page exists. Use with caution until liveness and pricing can be confirmed.","tags":[],"capabilities":["disposable-email-detection","domain-validation","email-validation","mx-record-lookup","typo-suggestion","role-based-detection","free-provider-detection","x402-payment"],"categories":["email","validation"],"synonyms":["disposable email check","throwaway email detection","temporary email validator","email domain validation","burner email check","email hygiene","email verification API"],"warnings":["Endpoint returned HTTP 410 (Gone) on GET and 405 on POST — may be moved or decommissioned","Listed URL /disposable does not match OpenAPI path /mailcheck/disposable","No x402 payment challenge was captured; pricing is unknown","No pricing page found on the site","Root URL returns 404"],"endpointUrl":"https://mailcheck.hugen.tokyo/disposable","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60","amount":"5000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","extra":{"feePayer":"BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"},"payTo":"4du4AfkjJEwch2zk3shkPJVZfyJHNDnNjEWC6AboaS5Z","amount":"5000","scheme":"exact","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The listed endpoint URL (/disposable) returned 410 Gone, suggesting it may have moved to /mailcheck/disposable or been decommissioned. No x402 402 challenge was captured, so pricing is unknown. The OpenAPI spec is complete for the /mailcheck/disposable path, but the actual listed endpoint appears 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'/disposable':146,155,177 '/docs':122 '/mailcheck/disposable':84,175 '000':67 '3.1':114 '402':198 '405':163 '410':158 '5':66 'accept':85 'actual':171 'address':76 'also':124 'api':27,48,108,133 'avail':195 'base':75 'belong':35 'broader':46 'burner email check' 'call':10,22 'captur':201 'caution':209 'challeng':199 'check':1,13,30,57,173 'confirm':216 'descript':134 'detail':192 'detect':64,72,77 'discoveri':138 'dispos':7,19,28,63,106,172 'disposable email check' 'disposable-email-detection' 'disposable/throwaway':38 'document':110,139 'domain':5,17,34,69,91,104 'domain-validation' 'e.g':94 'email':4,16,39,55 'email domain validation' 'email hygiene' 'email verification API' 'email-validation' 'endpoint':29,83,128,151,179 'exist':206 'expos':125 'free':70 'free-provider-detection' 'get':87,161 'given':33 'gone':159 'guerrillamail.com':95 'host':49 'http':157 'includ':117 'incorrect':190 'indic':101 'json':99 'known':68 'list':150,169,186 'live':211 'llms.txt':127 'lookup':62 'machin':131 'machine-read':130 'mailcheck':26,47 'mailcheck.hugen.tokyo':51,154 'mailcheck.hugen.tokyo/disposable':153 'may':180,188 'move':183 'mx':60 'mx-record-lookup' 'note':142 'object':100 'offer':53 'openapi':113,167 'page':205 'paid':8,20 'paramet':93 'part':43 'path':147 'per':9,21 'post':165 'price':191,204,213 'probe':144 'provid':40,71 'queri':92 'readabl':132 'record':61 'request':88 'return':97,156 'role':74 'role-bas':73 'role-based-detection' 'six':54 'spec':115,168 'specif':82 'suggest':80 'swagger':119 'syntax':58 'temporary email validator' 'throwaway email detection' 'typo':79 'typo-suggestion' 'ui':120 'url':152,187 'use':207 'valid':56,59 'via':11,23,111 'whether':31,102 'x402':12,24,137,197 'x402-payment'","prices":[{"id":"1c8498eb-b488-4358-a88e-a95e60fbc44e","listingId":"fbaa2dfe-8a8d-4486-be3e-b183fed8c8b7","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":null,"chain":"base","payTo":"0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60","amount":"5000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","extra":{"feePayer":"BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"},"payTo":"4du4AfkjJEwch2zk3shkPJVZfyJHNDnNjEWC6AboaS5Z","amount":"5000","scheme":"exact","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:34.817Z"}],"sources":[{"listingId":"fbaa2dfe-8a8d-4486-be3e-b183fed8c8b7","source":"x402_bazaar","sourceId":"https://mailcheck.hugen.tokyo/disposable","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:34.817Z","lastSeenAt":"2026-04-22T05:32:26.530Z"}],"details":{"listingId":"fbaa2dfe-8a8d-4486-be3e-b183fed8c8b7","quickStartSnippet":"curl \"https://mailcheck.hugen.tokyo/mailcheck/disposable?domain=guerrillamail.com\"","exampleRequest":null,"exampleResponse":{"domain":"guerrillamail.com","is_disposable":true},"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"6 email validation checks in one call — syntax, MX records, disposable detection (5,000+ domains), free provider, role-based, and typo suggestion","source_url":"https://mailcheck.hugen.tokyo/docs"},{"claim":"DisposableResponse schema requires domain (string) and is_disposable (boolean)","source_url":"https://mailcheck.hugen.tokyo/docs"},{"claim":"Disposable check endpoint accepts domain query parameter with max length 253","source_url":"https://mailcheck.hugen.tokyo/docs"},{"claim":"Endpoint at /disposable returned 410 on GET and 405 on POST","source_url":"https://mailcheck.hugen.tokyo/disposable"}],"useCases":["Filtering out disposable email addresses during user registration","Validating email domains before sending transactional emails","Enriching lead data by flagging throwaway addresses","Automated email list cleaning in agent workflows","Preventing fraud by rejecting known disposable email domains"],"bestFor":["Agents that need quick disposable-domain lookups without API keys","Registration flows that want to block throwaway emails","Email validation pipelines needing a simple boolean check"],"notFor":["Full SMTP-level email deliverability verification","Bulk email list validation (no batch endpoint documented)","Use cases requiring guaranteed uptime — endpoint liveness is uncertain"],"kindDetails":{},"updatedAt":"2026-04-22T01:22:01.397Z"}}