Datacircle

MailSift, POST /verify/bulk, Verify a CSV in bulk with Deep Verification: 5 email validation API plans

MailSift's sitellms.txt
50% complete: 3 of the 6 key fieldsSee which
$0.00per 1,000 emails
Plan: Free one of MailSift's 5 plans
Call: POST /verify/bulk, Verify a CSV in bulk with Deep Verification one of MailSift's 6 calls

About this item

  • Live. The call checks the email when you make it.
  • 3 of the 6 key fields. Address, Its check, Confidence.
  • Nothing to pay. You get 500 credits once, enough for 100 results. Credits never expire.
  • One call. You send file, mode=deep to POST /verify/bulk. The call returns a job: another call reads its answer, or the provider sends it to a URL you give.
  • Who can get it: anyone 16 or older. Keep data: no limit. Use data: with conditions.

Compare with similar plans

Other providers' plans with the closest prices per 1,000. Like this plan, each is live.

This planMailSift, free, Free, POST /verify/bulk, Verify a CSV in bulk with Deep VerificationMelissa, free, Monthly Top-off, GET /V4/WEB/GlobalEmail/doGlobalEmailMinelead, freeMailValidation.io, free, Free, POST /api/validate/MyEmailVerifier, free, 100 free credits daily, GET /verifier/validate_single/{email}/{API_KEY}
$ per 1,000$0.00$0.00$0.00$0.00$0.00
Completeness50%50%50%33%33%
Billingfreefreefreefreefree
Pay$0$0$0$0$0
Enough for100 results, once250 calls a month25 calls a month100 calls100 calls a day
Freshnesslivelivelivelivelive
Who can get itanyone 16 or olderanyone who pays the "$4.97 Verification Fee (One-Time)" (a KYC/AML identity check), after it Melissa tops off up to 1,000 free credits a monthanyoneanyoneanyone who verifies a phone number

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.

  1. mailsift.dev
  2. mailsift.dev/api
  3. mailsift.dev/docs/api-reference.md
  4. mailsift.dev/docs/overview.md
  5. mailsift.dev/llms.txt
  6. mailsift.dev/openapi.json
  7. mailsift.dev/pricing
  8. mailsift.dev/terms

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

  • Address
  • Its check
  • Confidence
  • Name, not in the answer
  • Place, not in the answer
  • Company, not in the answer
Price
$ per 1,000$0.00
Billingfree
Aggregators
Aggregatorsnone
Charges
Perresult
Also pays forfrom the same budget: Verify one email · 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
Not found
$ per 1,000$0.00
Catch-all
$ per 1,000$0.00
In their words
Their pitchMailSift 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
Freshnesslive
Keep datano limit
Use dataYou 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 get500 credits
Enough for100 results, once
Expiresnever
Rate limit
Per second1
Speed
Answerby polling or webhook
The call
You sendfile, mode=deep
MethodPOST
Path/verify/bulk
About the plan
PlanFree
Who can get itanyone 16 or older
The 33 fields the plan's answer can hold

job ID, filename, total rows, processed rows, valid count, invalid count, risky count, unknown count, job status, mode, credits reserved, error message, started at, completed at, created at, email, status, sub-status, score, disposable, MX, role address, free provider, relay, blocklisted, SPF, DMARC, domain age, MX provider, normalized email, typo suggestion, SMTP status, mailbox exists