Datacircle

Mailfloss, POST /v1/batch-verify: email validation API pricing, 45 plans

Mailfloss's sitellms.txt
50% complete: 3 of the 6 key fieldsSee which
$0.00per 1,000 emails
Plan: Free one of Mailfloss's 45 plans
Call: POST /v1/batch-verify one of Mailfloss's 2 calls

About this item

  • Live. The call checks the email when you make it.
  • 3 of the 6 key fields. Address, Its check, Company.
  • Nothing to pay. You get 500 credits a month, enough for 500 results.
  • One call. You send emails to POST /v1/batch-verify. Optional: webhook_url, Idempotency-Key. 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 of the legal age of majority, for their own internal business use. 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 planMailfloss, free, Free, POST /v1/batch-verifyMailrook, free, forever, GET /v1/validate/{email}MailSift, free, Free, GET /verify, Verify one emailMelissa, free, Monthly Top-off, GET /V4/WEB/GlobalEmail/doGlobalEmailMailValidation.io, free, Free, POST /api/validate/
$ per 1,000$0.00$0.00$0.00$0.00$0.00
Completeness50%67%67%67%33%
Billingfreefreefreefreefree
Pay$0$0$0$0$0
Enough for500 results a month25 calls a day500 calls, once250 calls a month100 calls
Freshnesslivelivelivelivelive
Who can get itanyone of the legal age of majority, for their own internal business useanyoneanyone 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 monthanyone

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. api.mailfloss.com/v1/openapi.json
  2. developers.mailfloss.com
  3. developers.mailfloss.com/rate-limits
  4. docs.mailfloss.com/do-prepaid-credits-come-with-the-same-features-as-subscription-plans
  5. docs.mailfloss.com/how-to-generate-an-api-key-and-add-a-webhook-in-mailfloss
  6. docs.mailfloss.com/pricings-for-subscription-plans-subscription-add-ons-and-prepaid-credits
  7. docs.mailfloss.com/understanding-prepaid-credits
  8. docs.mailfloss.com/understanding-subscription-credits
  9. docs.mailfloss.com/understanding-your-credits-subscription-and-prepaid
  10. docs.mailfloss.com/what-is-overage-and-how-does-it-work
  11. mailfloss.com/developer-terms/
  12. mailfloss.com/email-verification-api/
  13. mailfloss.com/pricing/
  14. mailfloss.com/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, not in the answer
  • Name, not in the answer
  • Place, not in the answer
  • Company
Price
$ per 1,000$0.00
Billingfree
Aggregators
Aggregatorsnone
Charges
Perresult
Also pays forfrom the same budget: Verify a single email address
Not found
$ per 1,000$0.00
In their words
Their pitchA REST API for verifying email addresses — JSON in, JSON out. Built for product teams and AI agents that need programmatic answers, not dashboards.
Data
Freshnesslive
Keep datano limit
Use dataYou may only use the Mailfloss Service solely for Your own internal business use [...] only for lawful purposes and in accordance with these Terms of Use
Plan
Pay$0
You get500 credits a month
Enough for500 results a month
Rate limit
Per second166.67
Speed
Answerby polling or webhook
The call
You sendemails. Optional: webhook_url, Idempotency-Key
MethodPOST
Path/v1/batch-verify
About the plan
PlanFree
Who can get itanyone of the legal age of majority, for their own internal business use
The 15 fields the plan's answer can hold

job id, email, domain, status, reason, passed, processed, suggestion, completed at, index, fixed, deleted, unsubscribed, updated, tagged