# Call402, pay as you go: Email verification API

> Email address validation for signup screening, lead cleanup and form verification: syntax check, disposable/temporary-domain detection and a live MX-record lookup for the domain.

Call402's email verification API on its Pay per call plan. It costs $5.00 per 1,000 emails. It returns 2 of the 6 key fields we check: Address, Deliverability.
We haven't run Call402 through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
Half of the 3,753 plans we rank by price cost $1.98 per 1,000 emails or less. This plan costs less per 1,000 emails than 21% of the 3,753 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.
[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.
[MailTester Ninja](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt), [Enrich.so](https://datacircle.dev/validate-email-apis/enrich-so/499-monthly/llms.txt) and [GetProspect](https://datacircle.dev/validate-email-apis/getprospect/369-pack/llms.txt) are the best email verification API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/call402/pay-as-you-go
- [Email validation API: 180+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://call402.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://call402.com/api/email-verify`
- API key: not needed
- Its API docs: https://call402.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: Call402 (https://call402.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-05

## In the answer

- Completeness: 33%
- Address: ✓
- Deliverability: ✓

## Price

- $ per 1,000 emails: $5.00
- Per: call
- Billing: pay as you go

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## In their words

- Their pitch: Email address validation for signup screening, lead cleanup and form verification: syntax check, disposable/temporary-domain detection and a live MX-record lookup for the domain.

## Data

- What it checks: format, 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: email
- Method: POST
- Path: /api/email-verify

## About the plan

- Plan: Pay per call
- Who can get it: anyone, with no account or API key, paying each call in USDC from a wallet: x402 on Base

## The 6 fields the plan's answer can hold

email, syntax valid, disposable, MX found, MX hosts, verdict

## Call402's plans (1)

- [Call402, pay as you go](https://datacircle.dev/validate-email-apis/call402/pay-as-you-go/llms.txt): $5.00 per 1,000, 33% complete

## Call402's calls for this API (1)

- `POST /api/email-verify`: [Call402, pay as you go](https://datacircle.dev/validate-email-apis/call402/pay-as-you-go/llms.txt)

## Call402's APIs (3)

- [Call402: email verification API pricing, 1 plan](https://datacircle.dev/validate-email-apis/call402/pay-as-you-go/llms.txt)
- [Call402: phone validation API pricing, 1 plan](https://datacircle.dev/validate-phone-apis/call402/pay-as-you-go/llms.txt)
- [Call402: web scraping API pricing, 1 plan](https://datacircle.dev/web-scraping-apis/call402/pay-as-you-go/llms.txt)

## Call402: email verification API alternatives

- [MillionPhones, top-up from $5](https://datacircle.dev/validate-email-apis/millionphones/top-up-from-5/llms.txt): $5.00 per 1,000, 33% complete, live
- [NullBounce, $5 pack](https://datacircle.dev/validate-email-apis/nullbounce/5-pack/llms.txt): $5.00 per 1,000, 33% complete, live
- [Qualisend, $5 monthly, Pro, 1,000 credits a month, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/5-monthly-pro-1000-credits-a-month-post-verify-bulk/llms.txt): $5.00 per 1,000, 50% complete, live
- [Bouncer, $250 pack, Pay as you go, 50,000 credits, POST /v1.1/email/verify/batch](https://datacircle.dev/validate-email-apis/bouncer/250-pack-pay-as-you-go-50000-credits-post-v1-1-email-verify-batch/llms.txt): $5.00 per 1,000, 67% 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 2026-11-05.

- https://call402.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://call402.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://call402.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://call402.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing