Datacircle

Facts402 pricing: email verification API

Facts402's siteThis page as plain textEmail validation API: best verification providers comparedFacts402: email verification API alternatives

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50% complete: 3 of the 6 fields on our checklistSee the 6 fields
$10.00per 1,000 emailsWe haven't run Facts402 through our email verification API benchmark yet.We rank 4,337 plans for email verification APIs by price. Half the plans cost $2.00 or less per 1,000 emails. This plan costs less per 1,000 emails than 10% of the 4,337 plans.treg's top-up from $10 is the cheapest paid plan per 1,000 emails: $0.00 on average. treg asks one provider after another until one answers. You pay $68.365 per 1,000 emails when no provider answers. StableEnrich's pay-as-you-go plan costs the least for 10,000 emails a month: $0.05.Disify's $9 monthly plan (/email) covers any number of emails. Disify's $9 monthly plan costs less up front than treg's top-up from $10.pingutil, Validemail.co and looot are the best email verification API providers in the Datacircle benchmark.
Type a number to see the cheapest Facts402 plan for that many emails. The table below then sorts the other plans by what each costs.
Plan: x402 pay per call Facts402's only plan
Call: POST /email Facts402's only call for this API
API: Email verification API one of Facts402's 4 APIs

About this item

  • Freshness. We don't know how fresh this plan's data is.
  • 3 of the 6 fields on our checklist. Address, Deliverability, Company.
  • Nothing to buy first. You pay per call.
  • One call. You send email to POST /email. The call returns whether the address takes mail.
  • Who can get it: anyone with a wallet paying USDC on Base (x402 v2), with no account or API key. Keep data: no API terms. Use data: no API terms.

Facts402: email verification API alternatives

Facts402 alternatives: other email verification API providers by price

We list other providers' plans closest to this plan in price per 1,000 emails.

This planFacts402, pay as you goTuski, pay as you goClearout, $1,000 pack, 500,000 credits, POST /email_verify/instant, Instant Verify, fullInboxPolicy, pay as you go, Pay-per-call (x402), POST /v1/decideCatch-all Verifier, $25 pack, 2,500 Credits, POST /api/v1/verify/singleAgentX.sale, pay as you go
$ per 1,000 emails$10.00$10.00$10.00$10.00$10.00$10.00
Completeness50%50%50%50%33%33%
Billingpay as you gopay as you gopay firstpay as you gopay firstpay as you go
Payper callper call$1,000per call$25per call
Enough foras many as you pay foras many as you pay for100,000 calls1 call2,500 callsas many as you pay for
Freshnessunknownunknownlive72 hoursliveunknown
Who can get itanyone with a wallet paying USDC on Base (x402 v2), with no account or API keyanyonenot new usersanyoneanyoneanyone with a wallet paying each call in USDC on Base or Solana (x402), no account or API key

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-09.

  1. api.facts402.com/
  2. api.facts402.com/.well-known/x402
  3. api.facts402.com/llms.txt
  4. api.facts402.com/openapi.json

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

  • Address
  • Deliverability
  • Confidence, not in the answer
  • Name, not in the answer
  • Place, not in the answer
  • Company
Price
$ per 1,000 emails$10.00
Percall
Billingpay as you go
Aggregators
Aggregatorsnone
Charges
Also pays fornothing else
Not found
$ per 1,000$0.00
In their words
Their pitchUse when an agent needs email validation before sending or saving a signup: RFC syntax and normalisation, live DNS (domain exists, MX, accepts mail, null MX), disposable-domain and role-account (info@, support@) flags. No SMTP probing and no mail sent, so it cannot prove a mailbox exists.
Data
What it checksformat, mail servers, disposable domains, role addresses
Keep datano API terms
Use datano API terms
Plan
Payper call
Rate limit
Batch1
Speed
Answerin the call
The call
You sendemail
MethodPOST
Path/email
About the plan
Planx402 pay per call
Who can get itanyone with a wallet paying USDC on Base (x402 v2), with no account or API key
The 13 fields the plan's answer can hold

email address, normalized email address, local part, domain, valid syntax, domain exists, MX records, implicit MX, null MX, accepts mail, disposable domain, role account, disclaimer

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