{"uid":"cap_Ifz0Nu3HXVKY3XnGs9iLk","slug":"agent-email-check-batch-email-validation-622b89e7","name":"Agent Email Check – Batch Email Validation","description":"Check up to 100 email addresses in one paid call, billed per address.","url":"https://mail.halowerk.com/email/batch","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"emails":{"type":"array","items":{"type":"string"},"maxItems":100,"minItems":1,"description":"Between 1 and 100 addresses. Billed at 0.0006 USDC per address with a 0.001 USDC minimum charge."},"smtp_check":{"type":"boolean","default":false,"description":"Ask for an optional SMTP probe. Off by default, heavily throttled, one attempt per target and never retried. Without it the verdict of a routable address stays \"unknown\"."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_aJQhRZ-YwnqSBZIIQEf_d","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates up to 100 email addresses per call using DNS and list-based checks, with optional SMTP probing, billed per address.","exampleAgentPrompt":"Can you check these 50 email addresses for validity — I want to know which ones are deliverable before I send the campaign, and please run SMTP probes on them too.","exampleUseCases":[{"title":"Pre-send mailing list cleanup","prompt":"I have a list of 80 subscriber emails I collected from a form — can you validate all of them and tell me which ones are invalid or undeliverable before I send the newsletter?"},{"title":"CRM contact hygiene sweep","prompt":"We just exported 95 contacts from our CRM. Can you run them through email verification with SMTP probing so we know which addresses are actually reachable?"},{"title":"New user registration email check","prompt":"We're getting a lot of fake signups. Can you verify these 30 email addresses from today's registrations and flag any that look invalid or undeliverable?"}],"resultDescription":"For each submitted email address, the endpoint returns a verdict on validity and deliverability based on DNS and blocklist checks. If SMTP probing is enabled, a best-effort probe result is included — though without SMTP the verdict for routable addresses remains 'unknown'. Results cover up to 100 addresses per call, billed at 0.0006 USDC per address with a 0.001 USDC minimum.","failureModes":["Submitting more than 100 emails returns a validation error","Submitting an empty array returns a validation error","SMTP checks are heavily throttled and only attempted once per address — results may be absent or inconclusive","Some domains block SMTP probes, leaving verdicts as 'unknown' even with smtp_check enabled","Malformed email strings may be flagged as invalid without detailed reasoning"],"whenToPreferThis":"Use this endpoint when you need to validate multiple email addresses in one round-trip and want to minimize cost through batching. It is ideal for list hygiene before email campaigns, CRM cleanups, or filtering sign-ups. Prefer this over single-address validators when you have 2–100 addresses to check. The optional SMTP probe is valuable when DNS-only results are insufficient, but be aware it is throttled and not retried.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:39:13.029Z","isFirstParty":false}