Datacircle

Blackwood State pricing: email verification API, POST /v1/email-check

Blackwood State's siteThis page as plain textEmail validation API: best verification providers comparedBlackwood State: email verification API alternatives

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50% complete: 3 of the 6 fields on our checklistSee the 6 fields
$5.00per 1,000 emailsWe haven't run Blackwood State 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 22% 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 Blackwood State plan for that many emails. The table below then sorts the other plans by what each costs.
Plan: x402 pay per call one of Blackwood State's 4 plans
Call: POST /v1/email-check one of Blackwood State's 2 calls for this API
API: Email verification API one of Blackwood State'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 /v1/email-check. The call returns whether the address takes mail.
  • Who can get it: with conditions. Keep data: no API terms. Use data: no API terms.

Blackwood State: email verification API alternatives

Blackwood State alternatives: other email verification API providers by price

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

This planBlackwood State, pay as you go, x402 pay per call, POST /v1/email-checkMillionPhones, top-up from $5NullBounce, $5 packQualisend, $5 monthly, Pro, 1,000 credits a month, POST /verify/bulkMailProbe, $5 pack
$ per 1,000 emails$5.00$5.00$5.00$5.00$5.00
Completeness50%33%33%50%50%
Billingpay as you gopay firstpay firstmonthlypay first
Payper call$5$5$5$5
Enough foras many as you pay for1,000 calls1,000 calls1,000 results a month1,000 results
Freshnessunknownlivelivelivelive
Who can get itanyone with a wallet paying each call in USDC on Base (x402), with no account or API keyanyone with a work emailanyoneanyone aged 18 or overanyone

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.cdp.coinbase.com/platform/v2/x402/discovery/resources
  2. x402-gateway.blackwoodstate8.workers.dev
  3. x402-gateway.blackwoodstate8.workers.dev/llms.txt
  4. x402-gateway.blackwoodstate8.workers.dev/openapi.json
  5. x402-gateway.blackwoodstate8.workers.dev/services/email-check

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$5.00
Percall
Billingpay as you go
Aggregators
Aggregatorsnone
Charges
Also pays fornothing else
In their words
Their pitchReturns JSON with email verification of one address: syntax, domain MX records, disposable, free and role-account flags, SPF and DMARC, and a verdict on whether the domain can receive mail.
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/v1/email-check
About the plan
Planx402 pay per call
Who can get itanyone with a wallet paying each call in USDC on Base (x402), with no account or API key
The 16 fields the plan's answer can hold

email, normalized email, syntax valid, domain, disposable, free provider, role account, domain exists, MX records, accepts mail, SPF record, DMARC record, DMARC policy, verdict, reasons, SMTP checked

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