# TempMailChecker, free: Email verification API

> Check disposable and temporary email addresses at signup with one REST request and one boolean response. 336,000+ domains, sub-5ms processing, and 100 free lifetime API checks.

TempMailChecker's email verification API on its Free plan. It costs $0.00 per 1,000 emails. It returns 1 of the 6 key fields we check: Deliverability.
In [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt), TempMailChecker's best plan scores 0.0 out of 100.
This plan is free. We rank 3,341 plans for email verification APIs by price. Half the plans cost $1.985 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/tempmailchecker/free
- [Email validation API: 160+ providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://tempmailchecker.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `GET https://tempmailchecker.com/check`
- API key: with the plan, on https://tempmailchecker.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://tempmailchecker.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing#endpoint
- Sold by: TempMailChecker (https://tempmailchecker.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 17%
- Deliverability: ✓

## 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

## Catch-all

- $ per 1,000: $0.00

## In their words

- Their pitch: Check disposable and temporary email addresses at signup with one REST request and one boolean response. 336,000+ domains, sub-5ms processing, and 100 free lifetime API checks.

## Data

- Freshness: 24 hours
- What it checks: disposable domains
- Keep data: 24 hours
- Use data: You agree not to use the Service to: Violate any laws or regulations, Harvest or collect email addresses for spam, Attempt to reverse-engineer our detection algorithms, Resell API access without authorization, Circumvent rate limits or authentication, Attack, probe, or test vulnerability of our systems, Interfere with other users' access to the Service, Use the Service for any illegal purpose [...] When using our API, you agree to: [...] Not misrepresent the source of the email validation

## Plan

- Pay: $0
- You get: 100 requests
- Enough for: 100 calls, once
- Expires: never

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: one of email or domain
- Method: GET
- Path: /check

## About the plan

- Plan: Free
- Who can get it: anyone at least 13 years old, or the minimum age in their jurisdiction

## The only field the plan's answer can hold

disposable

## TempMailChecker's plans (5)

- [TempMailChecker, free](https://datacircle.dev/validate-email-apis/tempmailchecker/free/llms.txt): $0.00 per 1,000, 17% complete, 24 hours
- [TempMailChecker, $12 monthly](https://datacircle.dev/validate-email-apis/tempmailchecker/12-monthly/llms.txt): $4.00 per 1,000, 17% complete, 24 hours
- [TempMailChecker, $29 monthly](https://datacircle.dev/validate-email-apis/tempmailchecker/29-monthly/llms.txt): $1.933 per 1,000, 17% complete, 24 hours
- [TempMailChecker, $69 monthly](https://datacircle.dev/validate-email-apis/tempmailchecker/69-monthly/llms.txt): $1.15 per 1,000, 17% complete, 24 hours
- [TempMailChecker, contact us](https://datacircle.dev/validate-email-apis/tempmailchecker/contact-us/llms.txt): 17% complete, 24 hours

## TempMailChecker's calls (1)

- `GET /check`: [TempMailChecker, free](https://datacircle.dev/validate-email-apis/tempmailchecker/free/llms.txt)

## TempMailChecker's APIs (1)

- [TempMailChecker: email verification API pricing, 5 plans](https://datacircle.dev/validate-email-apis/tempmailchecker/free/llms.txt)

## TempMailChecker: email verification API alternatives

- [Minelead, $2,748 yearly, Enterprise, GET /validate](https://datacircle.dev/validate-email-apis/minelead/2748-yearly/llms.txt): $1.145 per 1,000, 50% complete, live
- [SafetyMails, $6,630 yearly, Annual subscription, 480,000 credits monthly](https://datacircle.dev/validate-email-apis/safetymails/6630-yearly-annual-subscription-480000-credits-monthly/llms.txt): $1.151 per 1,000, 33% complete, live
- [BetterEnrich, $288 pack, One-time Payment, 10K credits, POST /api/v1/verify-normal-email](https://datacircle.dev/validate-email-apis/betterenrich/288-pack-one-time-payment-10k-credits-post-api-v1-verify-normal-email/llms.txt): $1.152 per 1,000, 17% complete, live
- [Valid Email Checker, $59 monthly, 51,000 credits a month, POST /verify-bulk](https://datacircle.dev/validate-email-apis/valid-email-checker/59-monthly-51000-credits-a-month-post-verify-bulk/llms.txt): $1.157 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 2026-11-02.

- https://tempmailchecker.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://tempmailchecker.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://tempmailchecker.com/faq?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://tempmailchecker.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://tempmailchecker.com/tos?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing