# HALOWERK, pay as you go: Email verification API

> Syntax, Domain, MX-Einträge, Wegwerf-Anbieter, Rollenkonto, Freemailer, Tippfehler-Vorschlag und Zustellwahrscheinlichkeit. Optional SMTP-Handshake für Postfachprüfung.

HALOWERK's x402 plan for the email verification API costs $1.00 per 1,000 emails. We check each provider's docs for 6 fields. HALOWERK's docs list 4: Address, Deliverability, Confidence, Company.
We haven't run HALOWERK through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
We rank 4,468 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 67% of the 4,468 plans.
[treg's top-up from $10](https://datacircle.dev/validate-email-apis/treg/top-up-from-10/llms.txt) 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](https://datacircle.dev/validate-email-apis/stableenrich/pay-as-you-go-pay-per-request-with-x402-or-mpp-post-api-minerva-validate-emails/llms.txt) costs the least for 10,000 emails a month: $0.05.
[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. Disify's $9 monthly plan costs less up front than treg's top-up from $10.
[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/halowerk/pay-as-you-go
- [Email validation API: best verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://tools.halowerk.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://tools.halowerk.com/v1/email/validate`
- API key: not needed
- Its API docs: https://tools.halowerk.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: HALOWERK (https://halowerk.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-10

## In the answer

- Completeness: 67%
- Address: ✓
- Deliverability: ✓
- Confidence: ✓
- Company: ✓

## Price

- $ per 1,000 emails: $1.00
- Per: call
- Billing: pay as you go

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## In their words

- Their pitch: Syntax, Domain, MX-Einträge, Wegwerf-Anbieter, Rollenkonto, Freemailer, Tippfehler-Vorschlag und Zustellwahrscheinlichkeit. Optional SMTP-Handshake für Postfachprüfung.

## Data

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

## Plan

- Pay: per call

## Speed

- Answer: in the call

## The call

- You send: nothing required. Optional: email, emails, smtp_check
- Method: POST
- Path: /v1/email/validate

## About the plan

- Plan: x402
- Who can get it: anyone

## The 9 fields the plan's answer can hold

email address, valid syntax, domain, MX record, disposable, role account, free provider, score, verdict

## HALOWERK's plans (1)

- [HALOWERK, pay as you go](https://datacircle.dev/validate-email-apis/halowerk/pay-as-you-go/llms.txt): $1.00 per 1,000, 67% complete

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

- `POST /v1/email/validate`: [HALOWERK, pay as you go](https://datacircle.dev/validate-email-apis/halowerk/pay-as-you-go/llms.txt)

## HALOWERK's APIs (8)

- [HALOWERK: business verification API pricing, 1 plan](https://datacircle.dev/business-verification-apis/halowerk/pay-as-you-go/llms.txt)
- [HALOWERK: company enrichment API pricing, 1 plan](https://datacircle.dev/company-enrichment-apis/halowerk/pay-as-you-go/llms.txt)
- [HALOWERK: domain WHOIS API pricing, 1 plan](https://datacircle.dev/domain-whois-apis/halowerk/pay-as-you-go/llms.txt)
- [HALOWERK: email verification API pricing, 1 plan](https://datacircle.dev/validate-email-apis/halowerk/pay-as-you-go/llms.txt)
- [HALOWERK: phone validation API pricing, 1 plan](https://datacircle.dev/validate-phone-apis/halowerk/pay-as-you-go/llms.txt)
- [HALOWERK: tech stack API pricing, 2 plans, POST /stack](https://datacircle.dev/company-technology-apis/halowerk/pay-as-you-go-x402-post-stack/llms.txt)
- [HALOWERK: tech stack API pricing, 2 plans, POST /stack/batch](https://datacircle.dev/company-technology-apis/halowerk/pay-as-you-go-x402-post-stack-batch/llms.txt)
- [HALOWERK: tech stack API pricing, 2 plans, POST /stack/batch/25](https://datacircle.dev/company-technology-apis/halowerk/pay-as-you-go-x402-post-stack-batch-25/llms.txt)
- [HALOWERK: tech stack API pricing, 2 plans, POST /v1/tech/detect](https://datacircle.dev/company-technology-apis/halowerk/pay-as-you-go-x402-post-v1-tech-detect/llms.txt)
- [HALOWERK: web scraping API pricing, 1 plan, POST /batch/extract](https://datacircle.dev/web-scraping-apis/halowerk/pay-as-you-go-x402-post-batch-extract/llms.txt)
- [HALOWERK: web scraping API pricing, 1 plan, POST /extract](https://datacircle.dev/web-scraping-apis/halowerk/pay-as-you-go-x402-post-extract/llms.txt)
- [HALOWERK: IP company lookup API pricing, 1 plan, POST /ip](https://datacircle.dev/ip-company-lookup-apis/halowerk/pay-as-you-go-x402-post-ip/llms.txt)
- [HALOWERK: IP company lookup API pricing, 1 plan, POST /ip/batch](https://datacircle.dev/ip-company-lookup-apis/halowerk/pay-as-you-go-x402-post-ip-batch/llms.txt)
- [HALOWERK: IP company lookup API pricing, 1 plan, POST /v1/ip/reputation](https://datacircle.dev/ip-company-lookup-apis/halowerk/pay-as-you-go-x402-post-v1-ip-reputation/llms.txt)

## HALOWERK: email verification API alternatives

- [Prime Verifier, $200 pack, Pay-As-You-Go 200,000 credits, POST /v1/verify/single](https://datacircle.dev/validate-email-apis/prime-verifier/200-pack-pay-as-you-go-200000-credits-post-v1-verify-single/llms.txt): $1.00 per 1,000, 50% complete
- [BillionVerify, $20 pack, Starter, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/20-pack-starter-post-verify-bulk/llms.txt): $1.00 per 1,000, 67% complete, live
- [MillionPhones, $100 monthly](https://datacircle.dev/validate-email-apis/millionphones/100-monthly/llms.txt): $1.00 per 1,000, 33% complete, live
- [DeBounce, top-up from $200, 200K credits, GET /v1/, Single email validation](https://datacircle.dev/validate-email-apis/debounce/top-up-from-200-200k-credits-get-v1/llms.txt): $1.00 per 1,000, 50% 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://halowerk.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://halowerk.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://tools.halowerk.com/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://tools.halowerk.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://tools.halowerk.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://tools.halowerk.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing