# X402 Farm, free: Cached email verification API

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

X402 Farm's cached 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.
The cheapest of the 344 priced plans is [StableEnrich, pay as you go](https://datacircle.dev/cached-email-validation-apis/stableenrich/pay-as-you-go/llms.txt), at $0.005 per 1,000.

- This page: https://datacircle.dev/cached-email-validation-apis/x402-farm/free
- Get it: https://github.com/Ghost11777/x402-farm
- Its API docs: https://api.x-402.online/openapi.json
- Sold by: X402 Farm (https://api.x-402.online)
- Checked: 2026-10-23

## In the answer

- Completeness: 17%
- Deliverability: ✓

## Price

- $ per 1,000: $0.00
- Billing: free

## Aggregators

- Aggregators: none

## Charges

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

## X402 Farm's APIs (1)

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

## X402 Farm: cached email verification API alternatives

- [EmailDetective, free, Free, POST /emails](https://datacircle.dev/cached-email-validation-apis/emaildetective/free-free-post-emails/llms.txt): $0.00 per 1,000, 83% complete, stored
- [Emailit, free](https://datacircle.dev/cached-email-validation-apis/emailit/free/llms.txt): $0.00 per 1,000, 67% complete, stored (has MX records: live)
- [APIVerve, free](https://datacircle.dev/cached-email-validation-apis/apiverve/free/llms.txt): $0.00 per 1,000, 50% complete, stored (MX valid, MX record, null MX, can receive mail, has SPF, has DMARC: live)
- [Botoi, free, Free, POST /v1/disposable-email/check](https://datacircle.dev/cached-email-validation-apis/botoi/free-free-post-v1-disposable-email-check/llms.txt): $0.00 per 1,000, 50% complete, stored
- [UserCheck, free](https://datacircle.dev/cached-email-validation-apis/usercheck/free/llms.txt): $0.00 per 1,000, 50% 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
- https://api.x-402.online/.well-known/x402
- https://api.x-402.online/llms.txt
- https://api.x-402.online/openapi.json
- https://github.com/Ghost11777/x402-farm
- https://raw.githubusercontent.com/Ghost11777/x402-farm/main/README.md