# X402 Farm, free: Email verification API

> Check whether an email address is well-formed and its domain can receive mail, before you send.

X402 Farm's email verification API on its 1 free call per day plan. It costs $0.00 per 1,000 emails. It returns 1 of the 6 key fields we check: Deliverability.
You get up to 30 calls a month.
We haven't run X402 Farm 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/x402-farm/free
- [Email validation API: 180+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://github.com/Ghost11777/x402-farm?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `GET https://api.x-402.online/v1/email/verify`
- API key: not needed
- Its API docs: https://api.x-402.online/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: X402 Farm (https://api.x-402.online?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-10-23

## In the answer

- Completeness: 17%
- Deliverability: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: any data route ≤ $0.01

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Check whether an email address is well-formed and its domain can receive mail, before you send.

## Data

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

## Plan

- Pay: $0
- Enough for: 30 calls a month

## Rate limit

- Per day: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email
- Method: GET
- Path: /v1/email/verify

## About the plan

- Plan: 1 free call per day
- Who can get it: anyone

## The 5 fields the plan's answer can hold

deliverable, MX present, SPF present, DMARC policy, disposable domain

## X402 Farm's plans (2)

- [X402 Farm, free](https://datacircle.dev/validate-email-apis/x402-farm/free/llms.txt): $0.00 per 1,000, 17% complete, stored
- [X402 Farm, pay as you go](https://datacircle.dev/validate-email-apis/x402-farm/pay-as-you-go/llms.txt): $5.00 per 1,000, 17% complete, stored

## X402 Farm's calls (1)

- `GET /v1/email/verify`: [X402 Farm, free](https://datacircle.dev/validate-email-apis/x402-farm/free/llms.txt)

## X402 Farm's APIs (1)

- [X402 Farm: email verification API pricing, 2 plans](https://datacircle.dev/validate-email-apis/x402-farm/free/llms.txt)

## X402 Farm: email verification API alternatives

- [InboxVet, $25 pack, Starter Pack, POST /api/validate/batch](https://datacircle.dev/validate-email-apis/inboxvet/25-pack-starter-pack-post-api-validate-batch/llms.txt): $5.00 per 1,000, 33% complete, stored
- [Elastic Email, $750 monthly, Email Marketing Starter (150,000 contacts), POST /verifications/files](https://datacircle.dev/validate-email-apis/elastic-email/750-monthly-email-marketing-starter-150000-contacts-post-verifications-files/llms.txt): $5.00 per 1,000, 50% complete, stored
- [RealMail, $50 pack](https://datacircle.dev/validate-email-apis/realmail/50-pack/llms.txt): $5.00 per 1,000, 33% complete, stored
- [TempMailDetector, top-up](https://datacircle.dev/validate-email-apis/tempmaildetector/top-up/llms.txt): $5.00 per 1,000, 33% complete, stored

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-23.

- https://api.x-402.online?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://api.x-402.online/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://api.x-402.online/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://api.x-402.online/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://github.com/Ghost11777/x402-farm?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://raw.githubusercontent.com/Ghost11777/x402-farm/main/README.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing