# UnyKorn, pay as you go: Email verification API

> Email/domain deliverability check: MX, provider, SPF, DMARC policy, disposable flag

UnyKorn's x402 plan for the email verification API costs $3.00 per 1,000 emails. We check each provider's docs for 6 fields. UnyKorn's docs list 2: Deliverability, Confidence.
We haven't run UnyKorn through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
We rank 4,716 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 37% of the 4,716 plans. UnyKorn has no free email verification API plan. [733 email verification API plans on our price sheet are free.](https://datacircle.dev/best-email-verification-api.txt) [pingutil's free plan](https://datacircle.dev/validate-email-apis/pingutil/free-api-key-post-v1-verify/llms.txt) scores highest of the free plans in our benchmark, at 82.3 out of 100.
[PayPerQ's pay-as-you-go plan](https://datacircle.dev/validate-email-apis/payperq/pay-as-you-go-pay-per-request-with-l402-post-api-minerva-validate-emails/llms.txt) costs the least for 10,000 emails a month: $0.06.
[Disify's $9 monthly plan (/email)](https://datacircle.dev/validate-email-apis/disify/9-monthly-starter-post-email/llms.txt) covers any number of emails.
[Validemail.co](https://datacircle.dev/validate-email-apis/validemail-co/9-90-monthly-9-90-month-get-api-v1-validate/llms.txt), [pingutil](https://datacircle.dev/validate-email-apis/pingutil/free-api-key-post-v1-verify/llms.txt) and [looot](https://datacircle.dev/validate-email-apis/looot/top-up/llms.txt) are the best email verification API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/unykorn/pay-as-you-go
- [Email validation API: best verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://twin.unykorn.org/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://twin.unykorn.org/web/email-check`
- API key: not needed
- Its API docs: https://twin.unykorn.org/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: UnyKorn (https://twin.unykorn.org?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-10

## In the answer

- Completeness: 33%
- Deliverability: ✓
- Confidence: ✓

## Price

- $ per 1,000 emails: $3.00
- Per: call
- Billing: pay as you go

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## In their words

- Their pitch: Email/domain deliverability check: MX, provider, SPF, DMARC policy, disposable flag

## Data

- What it checks: mail servers, disposable domains
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: per call

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: params.email_or_domain
- Method: POST
- Path: /web/email-check

## About the plan

- Plan: x402
- Who can get it: anyone

## The 12 fields the plan's answer can hold

MX record found, mail provider, SPF record, DMARC record, DMARC policy, disposable, trust score, can receive mail, evidence hash, sources, limitations, receipt

## UnyKorn's plans (3)

- [UnyKorn, pay as you go](https://datacircle.dev/validate-email-apis/unykorn/pay-as-you-go/llms.txt): $3.00 per 1,000, 33% complete
- [UnyKorn, $5 pack](https://datacircle.dev/validate-email-apis/unykorn/5-pack/llms.txt): $3.00 per 1,000, 33% complete
- [UnyKorn, $25 pack](https://datacircle.dev/validate-email-apis/unykorn/25-pack/llms.txt): $3.00 per 1,000, 33% complete

## UnyKorn's calls for this API (1)

- `POST /web/email-check`: [UnyKorn, pay as you go](https://datacircle.dev/validate-email-apis/unykorn/pay-as-you-go/llms.txt)

## UnyKorn's APIs (8)

- [UnyKorn Hacker News search API pricing, 3 plans](https://datacircle.dev/hacker-news-search-apis/unykorn/pay-as-you-go/llms.txt)
- [UnyKorn Company enrichment API pricing, 3 plans](https://datacircle.dev/company-enrichment-apis/unykorn/pay-as-you-go/llms.txt)
- [UnyKorn Domain WHOIS API pricing, 3 plans](https://datacircle.dev/domain-whois-apis/unykorn/pay-as-you-go/llms.txt)
- [UnyKorn Email verification API pricing, 3 plans](https://datacircle.dev/validate-email-apis/unykorn/pay-as-you-go/llms.txt)
- [UnyKorn IP company lookup API pricing, 3 plans](https://datacircle.dev/ip-company-lookup-apis/unykorn/pay-as-you-go/llms.txt)
- [UnyKorn Web scraping API pricing, 3 plans](https://datacircle.dev/web-scraping-apis/unykorn/pay-as-you-go/llms.txt)
- [UnyKorn Business verification API pricing, 3 plans, POST /report/counterparty](https://datacircle.dev/business-verification-apis/unykorn/pay-as-you-go-x402-post-report-counterparty/llms.txt)
- [UnyKorn Business verification API pricing, 3 plans, POST /agents/evidence-01/dossier](https://datacircle.dev/business-verification-apis/unykorn/pay-as-you-go-x402-post-agents-evidence-01-dossier/llms.txt)
- [UnyKorn Business verification API pricing, 3 plans, POST /screen/entity](https://datacircle.dev/business-verification-apis/unykorn/pay-as-you-go-x402-post-screen-entity/llms.txt)
- [UnyKorn Company hierarchy API pricing, 3 plans, POST /report/counterparty](https://datacircle.dev/company-hierarchy-apis/unykorn/pay-as-you-go-x402-post-report-counterparty/llms.txt)
- [UnyKorn Company hierarchy API pricing, 3 plans, POST /agents/evidence-01/dossier](https://datacircle.dev/company-hierarchy-apis/unykorn/pay-as-you-go-x402-post-agents-evidence-01-dossier/llms.txt)
- [UnyKorn Company hierarchy API pricing, 3 plans, POST /screen/entity](https://datacircle.dev/company-hierarchy-apis/unykorn/pay-as-you-go-x402-post-screen-entity/llms.txt)

## UnyKorn: email verification API alternatives

[UnyKorn alternatives: other email verification API providers by price](https://datacircle.dev/unykorn-alternatives.txt)

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

- [Prime Verifier, $15 pack, Pay-As-You-Go 5,000 credits, POST /v1/verify/single](https://datacircle.dev/validate-email-apis/prime-verifier/15-pack-pay-as-you-go-5000-credits-post-v1-verify-single/llms.txt): $3.00 per 1,000, 50% complete
- [DeBounce, top-up from $15, 5K credits, GET /v1/, Single email validation](https://datacircle.dev/validate-email-apis/debounce/top-up-from-15-5k-credits-get-v1/llms.txt): $3.00 per 1,000, 50% complete, live
- [OrbiSearch, $30 pack, Starter, POST /v1/bulk](https://datacircle.dev/validate-email-apis/orbisearch/30-pack-starter-post-v1-bulk/llms.txt): $3.00 per 1,000, 50% complete, live
- [ExactVerify, $15 pack, Pay-As-You-Go from 5,000 emails, GET /v1/single](https://datacircle.dev/validate-email-apis/exactverify/15-pack-pay-as-you-go-from-5000-emails-get-v1-single/llms.txt): $3.00 per 1,000, 33% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-10.

- https://genesis402.com/catalog?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://twin.unykorn.org/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://twin.unykorn.org/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://twin.unykorn.org/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing