# MailSift, free, GET /verify, Verify one email: Email verification API

> MailSift is a fast, accurate email verification API and bulk CSV validator. It detects invalid, disposable, role-based, and risky email addresses using syntax, MX, SPF, DMARC, SMTP, and catch-all checks, returning a status and a 0–100 deliverability score.

MailSift's email verification API on its Free plan. It costs $0.00 per 1,000 emails. It returns 4 of the 6 key fields we check: Address, Deliverability, Confidence, Company.
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/mailsift/free-get-verify-verify-one-email
- [Best email verification API in 2026](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://mailsift.dev/pricing
- Request: `GET https://mailsift.dev/api/v1/verify`, Verify one email
- API key: with the plan, on https://mailsift.dev/pricing
- Its API docs: https://mailsift.dev/api#endpoints
- Sold by: MailSift (https://mailsift.dev)
- Checked: 2026-10-20

## In the answer

- Completeness: 67%
- Address: ✓
- Deliverability: ✓
- Confidence: ✓
- Company: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Verify one email with Deep Verification · Verify up to 100 emails at once · Verify up to 100 emails at once with Deep Verification · Verify a CSV in bulk · Verify a CSV in bulk with Deep Verification

## Not found

- $ per 1,000: $0.00

## Catch-all

- $ per 1,000: $0.00

## In their words

- Their pitch: MailSift is a fast, accurate email verification API and bulk CSV validator. It detects invalid, disposable, role-based, and risky email addresses using syntax, MX, SPF, DMARC, SMTP, and catch-all checks, returning a status and a 0–100 deliverability score.

## Data

- Freshness: stored (MX, SPF, DMARC: live)
- Keep data: no limit
- Use data: You may not use MailSift to: send unsolicited email, harass individuals, build databases of contact information for sale, circumvent rate limits or terms, or for any unlawful purpose. [...] You are responsible for having a lawful basis to process the email addresses you submit, including, where applicable, consent under the GDPR. [...] We grant you a non-transferable, revocable license to use the service for its intended purpose.

## Plan

- Pay: $0
- You get: 500 credits
- Enough for: 500 calls, once
- Expires: never

## Rate limit

- Per second: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email. Optional: mode, Idempotency-Key
- Method: GET
- Path: /verify

## About the plan

- Plan: Free
- Who can get it: anyone 16 or older

## The 39 fields the plan's answer can hold

email, status, sub-status, score, mode, credits used, domain, MX records, free check, response time, checked at, engine version, normalized email, did you mean, MX provider, domain age, blocklist listings, SPF record, DMARC record, DMARC policy, catch-all confidence, reasons, syntax valid, free provider, disposable, MX, parked, relay, SPF, DMARC, catch-all, role address, blocklisted, MX routable, forwarder, SMTPUTF8, MTA-STS, TLS-RPT, BIMI

## MailSift's plans (5)

- [MailSift, free, GET /verify, Verify one email](https://datacircle.dev/validate-email-apis/mailsift/free-get-verify-verify-one-email/llms.txt): $0.00 per 1,000, 67% complete, stored (MX, SPF, DMARC: live)
- [MailSift, $10 pack, Starter, GET /verify, Verify one email](https://datacircle.dev/validate-email-apis/mailsift/10-pack-starter-get-verify-verify-one-email/llms.txt): $0.40 per 1,000, 67% complete, stored (MX, SPF, DMARC: live)
- [MailSift, $35 pack, Growth, GET /verify, Verify one email](https://datacircle.dev/validate-email-apis/mailsift/35-pack-growth-get-verify-verify-one-email/llms.txt): $0.35 per 1,000, 67% complete, stored (MX, SPF, DMARC: live)
- [MailSift, $99 pack, Pro, GET /verify, Verify one email](https://datacircle.dev/validate-email-apis/mailsift/99-pack-pro-get-verify-verify-one-email/llms.txt): $0.283 per 1,000, 67% complete, stored (MX, SPF, DMARC: live)
- [MailSift, $249 pack, Enterprise, GET /verify, Verify one email](https://datacircle.dev/validate-email-apis/mailsift/249-pack-enterprise-get-verify-verify-one-email/llms.txt): $0.249 per 1,000, 67% complete, stored (MX, SPF, DMARC: live)

## MailSift's calls (6)

- `POST /verify/bulk`, Verify a CSV in bulk: [MailSift, free, POST /verify/bulk, Verify a CSV in bulk](https://datacircle.dev/validate-email-apis/mailsift/free-post-verify-bulk-verify-a-csv-in-bulk/llms.txt)
- `POST /verify/bulk`, Verify a CSV in bulk with Deep Verification: [MailSift, free, POST /verify/bulk, Verify a CSV in bulk with Deep Verification](https://datacircle.dev/validate-email-apis/mailsift/free-free-post-verify-bulk-verify-a-csv-in-bulk-with-deep-verification/llms.txt)
- `GET /verify`, Verify one email: [MailSift, free, GET /verify, Verify one email](https://datacircle.dev/validate-email-apis/mailsift/free-get-verify-verify-one-email/llms.txt)
- `GET /verify`, Verify one email with Deep Verification: [MailSift, free, GET /verify, Verify one email with Deep Verification](https://datacircle.dev/validate-email-apis/mailsift/free-free-get-verify-verify-one-email-with-deep-verification/llms.txt)
- `POST /verify/batch`, Verify up to 100 emails at once: [MailSift, free, POST /verify/batch, Verify up to 100 emails at once](https://datacircle.dev/validate-email-apis/mailsift/free-post-verify-batch-verify-up-to-100-emails-at-once/llms.txt)
- `POST /verify/batch`, Verify up to 100 emails at once with Deep Verification: [MailSift, free, POST /verify/batch, Verify up to 100 emails at once with Deep Verification](https://datacircle.dev/validate-email-apis/mailsift/free-free-post-verify-batch-verify-up-to-100-emails-at-once-with-deep-verification/llms.txt)

## MailSift's APIs (1)

- [MailSift: email verification API pricing, 5 plans, GET /verify, Verify one email](https://datacircle.dev/validate-email-apis/mailsift/free-get-verify-verify-one-email/llms.txt)

## MailSift: email verification API alternatives

- [StopReg, $50 monthly](https://datacircle.dev/validate-email-apis/stopreg/50-monthly/llms.txt): $0.25 per 1,000, 50% complete, stored
- [UserCheck, $50 monthly, Pro 200k, POST /v1/gates/{gate_id}/decisions, Decision endpoint](https://datacircle.dev/validate-email-apis/usercheck/50-monthly-pro-200k-post-v1-gates-gate-id-decisions-decision-endpoint/llms.txt): $0.25 per 1,000, 50% complete, stored
- [Elastic Email, $379 monthly, Email API Starter (1,500,000 emails/month), POST /verifications/files](https://datacircle.dev/validate-email-apis/elastic-email/379-monthly-email-api-starter-1500000-emails-month-post-verifications-files/llms.txt): $0.253 per 1,000, 50% complete, stored
- [ReefAPI, $1,200 yearly](https://datacircle.dev/validate-email-apis/reefapi/1200-yearly/llms.txt): $0.333 per 1,000, 67% 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 2026-10-20.

- https://mailsift.dev
- https://mailsift.dev/api
- https://mailsift.dev/docs/api-reference.md
- https://mailsift.dev/docs/overview.md
- https://mailsift.dev/llms.txt
- https://mailsift.dev/openapi.json
- https://mailsift.dev/pricing
- https://mailsift.dev/terms