# Corenexis, free, Basic, POST /email-validator/v1: Email verification API

> Real-time email verification with a live SMTP handshake, catch-all detection, MX/SPF/DMARC checks, and disposable, role-based & free-provider detection. One request, one direct JSON result — no queue, no waiting.

Corenexis's email verification API on its Basic plan. It costs $0.00 per 1,000 emails. It returns 3 of the 6 key fields we check: Address, Deliverability, Confidence.
We haven't run Corenexis through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
This plan is free. We rank 3,753 plans for email verification APIs by price. Half the plans cost $1.98 per 1,000 emails or less.
[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/corenexis/free-basic-post-email-validator-v1
- [Email validation API: 180+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://api.corenexis.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.corenexis.com/email-validator/v1`
- API key: with the plan, on https://api.corenexis.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://api.corenexis.com/email-validator/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: Corenexis (https://corenexis.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-05

## In the answer

- Completeness: 50%
- Address: ✓
- Deliverability: ✓
- Confidence: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Real-time email verification with a live SMTP handshake, catch-all detection, MX/SPF/DMARC checks, and disposable, role-based & free-provider detection. One request, one direct JSON result — no queue, no waiting.

## Data

- Freshness: live
- What it checks: format, mail servers, disposable domains, role addresses, mailbox
- Keep data: no limit
- Use data: Section 7: "In addition to the content restrictions in Section 5, you agree not to: Systematically retrieve data or content from the Services to create or compile a collection, compilation, database, or directory without written permission from us [...] Resell, sublicense, white-label, or redistribute API access without our prior written agreement, Use our Services to build or train a directly competing product [...]", Section 8: "Corenexis does not claim ownership of [...] the output generated for you", Section 11: "Use of the API platform must comply with all applicable laws and regulations and with the Acceptable Use and Content Policy in Section 5"

## Plan

- Pay: $0
- You get: 500 requests a month
- Enough for: 500 calls a month

## Rate limit

- Per second: 0.25
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email
- Method: POST
- Path: /email-validator/v1

## About the plan

- Plan: Basic
- Who can get it: anyone

## The 25 fields the plan's answer can hold

success, plan, email address, status, confidence score, syntax valid, domain exists, MX found, SPF found, DMARC found, MX record, SPF record, DMARC record, disposable, role, free, SMTP checked, SMTP deliverable, catch-all, SMTP code, SMTP reason, MX host, remaining validations, rate limit, monthly limit

## Corenexis's plans (8)

- [Corenexis, free, Basic, POST /email-validator/v1](https://datacircle.dev/validate-email-apis/corenexis/free-basic-post-email-validator-v1/llms.txt): $0.00 per 1,000, 50% complete, live
- [Corenexis, $0.99 monthly](https://datacircle.dev/validate-email-apis/corenexis/0-99-monthly/llms.txt): $0.099 per 1,000, 50% complete
- [Corenexis, $3.99 monthly](https://datacircle.dev/validate-email-apis/corenexis/3-99-monthly/llms.txt): $0.08 per 1,000, 50% complete
- [Corenexis, $4.99 monthly](https://datacircle.dev/validate-email-apis/corenexis/4-99-monthly/llms.txt): $0.998 per 1,000, 50% complete, live
- [Corenexis, $9.99 monthly](https://datacircle.dev/validate-email-apis/corenexis/9-99-monthly/llms.txt): $0.666 per 1,000, 50% complete, live
- [Corenexis, $19.99 monthly](https://datacircle.dev/validate-email-apis/corenexis/19-99-monthly/llms.txt): $0.08 per 1,000, 50% complete
- [Corenexis, $29.99 monthly](https://datacircle.dev/validate-email-apis/corenexis/29-99-monthly/llms.txt): $0.60 per 1,000, 50% complete, live
- [Corenexis, contact us, Enterprise, POST /email-validator/v1](https://datacircle.dev/validate-email-apis/corenexis/contact-us-enterprise-post-email-validator-v1/llms.txt): 50% complete, live

## Corenexis's calls (2)

- `POST /disposable-email-validator/v1`: [Corenexis, free, Basic, POST /disposable-email-validator/v1](https://datacircle.dev/validate-email-apis/corenexis/free-basic-post-disposable-email-validator-v1/llms.txt)
- `POST /email-validator/v1`: [Corenexis, free, Basic, POST /email-validator/v1](https://datacircle.dev/validate-email-apis/corenexis/free-basic-post-email-validator-v1/llms.txt)

## Corenexis's APIs (1)

- [Corenexis: email verification API pricing, 8 plans, POST /email-validator/v1](https://datacircle.dev/validate-email-apis/corenexis/free-basic-post-email-validator-v1/llms.txt)

## Corenexis: email verification API alternatives

- [Mailthentic, $29.99 monthly, Business (monthly), POST /api/verify/bulk](https://datacircle.dev/validate-email-apis/mailthentic/29-99-monthly-business-monthly-post-api-verify-bulk/llms.txt): $0.60 per 1,000, 67% complete, live
- [Bulk Email Checker, $149.95 pack](https://datacircle.dev/validate-email-apis/bulk-email-checker/149-95-pack/llms.txt): $0.60 per 1,000, 50% complete, live
- [VerifySwift, $59.99 pack](https://datacircle.dev/validate-email-apis/verifyswift/59-99-pack/llms.txt): $0.60 per 1,000, 50% complete, live
- [BillionVerify, $120 monthly, Business, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/120-monthly-business-post-verify-bulk/llms.txt): $0.60 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://api.corenexis.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://api.corenexis.com/disposable-email-validator/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://api.corenexis.com/email-validator/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://api.corenexis.com/mcp?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://corenexis.com/terms-of-service?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing