# emailverifier.dev, free: Email verification API

> Catch invalid addresses and disposable inboxes before you create accounts. Get an allow, review, or block recommendation, with the reasons behind it, from one API request.

emailverifier.dev's email verification API on its Starter plan. It costs $0.00 per 1,000 emails. It returns 2 of the 6 key fields we check: Address, Deliverability.
We rank 2,467 plans by price. [treg's top-up from $10](https://datacircle.dev/validate-email-apis/treg/top-up-from-10/llms.txt) costs the least per 1,000 emails: $0.00 on average. treg asks one provider after another until one answers. You pay $26.95 per 1,000 emails when no provider answers.
[Enrich.so](https://datacircle.dev/validate-email-apis/enrich-so/149-monthly/llms.txt), [GetProspect](https://datacircle.dev/validate-email-apis/getprospect/369-pack/llms.txt) and [treg](https://datacircle.dev/validate-email-apis/treg/top-up-from-10/llms.txt) are the best email verification API providers in our benchmark.

- This page: https://datacircle.dev/validate-email-apis/emailverifier-dev/free
- [Best email verification API in 2026](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://emailverifier.dev/pricing
- Request: `POST https://emailverifier.dev/api/v1/verify`
- API key: with the plan, on https://emailverifier.dev/pricing
- Its API docs: https://emailverifier.dev/docs/api
- Sold by: emailverifier.dev (https://emailverifier.dev)
- Checked: 2026-10-28

## In the answer

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

## Price

- $ per 1,000 emails: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Classify one email domain

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## Catch-all

- $ per 1,000: $0.00

## In their words

- Their pitch: Catch invalid addresses and disposable inboxes before you create accounts. Get an allow, review, or block recommendation, with the reasons behind it, from one API request.

## Data

- Freshness: live
- What it checks: format, mail servers, disposable domains, role addresses, mailbox
- Keep data: no limit
- Use data: Do not use the service to break the law, invade privacy, harvest addresses, send spam, bypass consent requirements, attack systems, resell access without permission, or interfere with service availability.

## Plan

- Pay: $0
- You get: 1,000 credits
- Enough for: 1,000 calls, once
- Expires: never

## Rate limit

- Batch: 1

## Speed

- Answer: in the call
- Median: 1.78 s

## The call

- You send: email
- Method: POST
- Path: /api/v1/verify

## About the plan

- Plan: Starter
- Who can get it: anyone

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

email address, status, recommended action, flagged, signals, suggestion

## emailverifier.dev's plans (2)

- [emailverifier.dev, free](https://datacircle.dev/validate-email-apis/emailverifier-dev/free/llms.txt): $0.00 per 1,000, 33% complete, live
- [emailverifier.dev, $10 pack](https://datacircle.dev/validate-email-apis/emailverifier-dev/10-pack/llms.txt): $0.50 per 1,000, 33% complete, live

## emailverifier.dev's calls (1)

- `POST /api/v1/verify`: [emailverifier.dev, free](https://datacircle.dev/validate-email-apis/emailverifier-dev/free/llms.txt)

## emailverifier.dev's APIs (1)

- [emailverifier.dev: email verification API pricing, 2 plans](https://datacircle.dev/validate-email-apis/emailverifier-dev/free/llms.txt)

## emailverifier.dev: email verification API alternatives

- [Sealch, $25 monthly, Monthly up to 50,000 / mo, POST /api/verify](https://datacircle.dev/validate-email-apis/sealch/25-monthly-monthly-up-to-50000-mo-post-api-verify/llms.txt): $0.50 per 1,000, 17% complete, live
- [Verimail, $500 pack](https://datacircle.dev/validate-email-apis/verimail/500-pack/llms.txt): $0.50 per 1,000, 50% complete, live
- [Mailerio, $500 monthly, Monthly 1,000,000 emails, GET /v{version}/validate](https://datacircle.dev/validate-email-apis/mailerio/500-monthly-monthly-1000000-emails-get-v-version-validate/llms.txt): $0.50 per 1,000, 67% complete, live
- [NullBounce, $500 pack](https://datacircle.dev/validate-email-apis/nullbounce/500-pack/llms.txt): $0.50 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 2026-10-28.

- https://emailverifier.dev
- https://emailverifier.dev/api/openapi.json
- https://emailverifier.dev/docs/api
- https://emailverifier.dev/docs/mcp
- https://emailverifier.dev/legal/refund-policy
- https://emailverifier.dev/legal/terms
- https://emailverifier.dev/pricing