{"uid":"cap_FmuCgRFB4TLwLs81OXp0i","slug":"northline-webkit-email-domain-check-4d885065","name":"Northline WebKit Email Domain Check","description":"Pay-per-call web and domain utilities for AI agents: URL to Markdown, link preview metadata, links, uptime/redirect check, DNS, email-domain check, WHOIS/RDAP, robots.txt and a one-call domain report. x402 (USDC on Base), no API key, no signup.","url":"https://northline-webkit.northline-c86.workers.dev/v1/email/check?utm_source=zero.xyz","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","required":["email"],"properties":{"email":{"type":"string","description":"Email address or bare domain"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"dmarc":{"policy":"none"},"flags":["free_email_provider"],"domain":"gmail.com","disposable":false,"acceptsMail":true,"freeProvider":true,"mailProvider":"Google Workspace"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_aBsGzR-_-x1hTq3HgLotc","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks an email address or domain for deliverability, provider type (free/disposable), DMARC policy, and mail provider identity","exampleAgentPrompt":"Can you check whether the email address user@tempmail.com is from a disposable or free provider, whether that domain actually accepts mail, and what its DMARC policy is?","exampleUseCases":[{"title":"Screen sign-ups for disposable emails","prompt":"Before we onboard this new user who signed up with user@guerrillamail.com, can you check if that email domain is disposable or from a throwaway provider?"},{"title":"Verify sender domain before outreach","prompt":"I'm about to run an outreach campaign to leads from a list — can you check whether contact@acmecorp.io actually accepts mail and what mail provider they use?"},{"title":"Audit email domain security posture","prompt":"Can you look up the DMARC policy and mail provider for the domain startup.io so I know how well they've set up their email security?"}],"resultDescription":"Returns a JSON object with: the normalized domain, whether it accepts mail, whether it is a free email provider, whether it is disposable, the detected mail provider name (e.g. 'Google Workspace'), the DMARC policy (e.g. 'none', 'quarantine', 'reject'), and an array of flags such as 'free_email_provider'.","failureModes":["Missing required 'email' query parameter returns an error","Invalid or malformed email/domain string may return an error or incomplete result","Domains with no MX records may return acceptsMail: false","DMARC lookup may return partial data if DNS is unresponsive","Payment failure via x402 prevents the call from completing"],"whenToPreferThis":"Use this endpoint when you need a quick, no-signup, pay-per-call check on an email address or domain covering deliverability, provider classification, disposable detection, and DMARC policy in a single call. Prefer it over building your own DNS/MX/DMARC lookups when you want a unified result with provider identification (e.g. 'Google Workspace') and disposable-provider flagging without API key management.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:36:59.751Z","isFirstParty":false,"canonicalSlug":"northline-webkit-email-domain-check-4d885065"}