{"uid":"cap_ssTrPpY1m-xPas2OqiBr7","slug":"inboxpolicy-send-decision-email-verification-api-5568e02d","name":"InboxPolicy Send-Decision Email Verification API","description":"Email verification API that returns a decision — send, review, or avoid — with evidence. $0.01/call via x402, no account. Free 72h re-verification.","url":"https://api.inboxpolicy.com/v1/batches/verify?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","required":["emails"],"properties":{"emails":{"type":"array","description":"Up to 5000 addresses; total price is count x the per-email rate."},"strictness":{"enum":["aggressive","default","strict"],"type":"string"},"webhook_url":{"type":"string","description":"Optional signed completion webhook."}}},"responseSchema":{"type":"object","required":["batch_id","status","total_items","access_token"],"properties":{"status":{"type":"string","example":"queued"},"batch_id":{"type":"string","example":"bat_..."},"amount_usd":{"type":"number"},"total_items":{"type":"integer"},"access_token":{"type":"string","description":"Keyless polling credential; send as x-batch-access-token."}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","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":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Qsn_uXrUYu-9jx3HS9_k1","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies a batch of email addresses and returns a send/review/avoid decision with supporting evidence for each address.","exampleAgentPrompt":"Verify this list of 200 email addresses for me and tell me which ones I should send to, which need review, and which to avoid — I want standard strictness.","exampleUseCases":[{"title":"Pre-campaign email list hygiene","prompt":"I have a list of 1,500 email addresses I'm about to send a product launch campaign to — can you verify all of them and flag which ones I should send to, which to review, and which to skip entirely?"},{"title":"Sales outreach list cleanup","prompt":"Before my SDR team starts their cold outreach next week, I need to verify these 300 prospect emails and get a clear send-or-avoid decision on each one so we don't burn our domain reputation."},{"title":"Automated sign-up validation pipeline","prompt":"We just exported 800 new user sign-up emails from the past month — run verification on all of them with strict settings and let me know which are safe to add to our mailing list."}],"resultDescription":"Returns a batch_id, queued status, total item count, amount charged in USD, and a keyless access_token used to poll for results via the x-batch-access-token header. Once processing completes, each email receives a send/review/avoid decision with supporting evidence.","failureModes":["Invalid or malformed email addresses in input array may cause partial failures or skipped entries","Batch size exceeding 5000 addresses will be rejected","Payment failure via x402 will prevent batch from being processed","Webhook URL misconfiguration may cause silent completion notification failures","Polling with an incorrect or expired access_token will return unauthorized errors","Network timeout on large batches requiring extended polling"],"whenToPreferThis":"Choose this endpoint when you need an actionable send/review/avoid decision on email addresses — not just a syntax check — and want evidence-backed results at scale (up to 5000 per call) with no account or API key required. Ideal for pre-campaign list cleaning, cold outreach hygiene, or automated sign-up validation pipelines where pay-per-use at $0.01/address fits better than a subscription.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T06:34:29.940Z","isFirstParty":false,"canonicalSlug":"inboxpolicy-send-decision-email-verification-api-5568e02d"}