{"uid":"cap_PNKu3qdUk-4WR80eXVTKK","slug":"is-email-hosted-by-postmark-bulk-730843ce","name":"is-email-hosted-by-postmark-bulk","description":"Bulk is email hosted by postmark: up to 20 domains in one call, processed concurrently, results in input order with a per-item error field and a failure count. Same answer per item as the single endpoint. Batch enrichment for agents that hold a list. $0.10 per batch.","url":"https://email.intel.rallylive.ca/bulk/email/hosted-by/postmark?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.1","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":"$0.1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_rOO8ADN0VLWH4XqMLCEs5","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks up to 20 domains at once to determine if each domain's email is hosted by Postmark, returning concurrent results with per-item error fields and a failure count.","exampleAgentPrompt":"Check whether these domains are hosted by Postmark for email: stripe.com, twilio.com, sendgrid.com, mailchimp.com, and github.com — I need results for all of them at once.","exampleUseCases":[{"title":"Enrich lead list for email provider","prompt":"I have a list of 15 prospect domains — acme.com, globex.com, initech.com, and 12 more — can you check all of them at once to see which ones are using Postmark for email hosting?"},{"title":"Competitive intelligence on Postmark adoption","prompt":"Here are 20 SaaS company domains I'm researching. Can you tell me which ones have their email hosted by Postmark, and flag any that couldn't be checked?"},{"title":"Audit partner domains for email stack","prompt":"Before we set up integrations, can you verify whether our 12 new partner domains are running Postmark for email? I want a pass/fail result for each domain in the same order I give them."}],"resultDescription":"An ordered array of results corresponding to each input domain, where each item indicates whether the domain's email is hosted by Postmark (based on MX record matching via Cloudflare DoH), plus a per-item error field for any lookup failures and an overall failure count for the batch.","failureModes":["DNS lookup failure for one or more domains (per-item error field populated)","Invalid or malformed domain names in the input list","Input list exceeds 20 domains limit","Network timeout during concurrent MX resolution","Domain has no MX records configured"],"whenToPreferThis":"Use this endpoint when you have a list of 2–20 domains and need to check Postmark hosting status for all of them in a single call, rather than making individual requests per domain. It's ideal for lead enrichment pipelines, competitive analysis, or any workflow where you need batch domain intelligence about Postmark usage without the overhead of sequential single-domain calls.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T18:30:54.514Z","isFirstParty":false,"canonicalSlug":"is-email-hosted-by-postmark-bulk-730843ce"}