# LeadFuze, $250 monthly, Starter, POST /verification/bulk-csv: Email verification API

> Check whether an address will accept mail before you send to it, one at a time, 100 at once or a whole file.

LeadFuze's email verification API on its Starter plan. It returns 1 of the 6 key fields we check: Deliverability.
We rank 3,228 plans by price. [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 our benchmark.

- This page: https://datacircle.dev/validate-email-apis/leadfuze/250-monthly-starter-post-verification-bulk-csv
- [Best email verification API in 2026: providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://www.leadfuze.com/pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://console.leadfuze.com/api/v1/verification/bulk-csv`
- API key: with the plan, on https://www.leadfuze.com/pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://www.leadfuze.com/api-docs/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: LeadFuze (https://www.leadfuze.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: result
- Billing: monthly
- $ a month: $250

## Aggregators

- Aggregators: none

## Charges

- Repeat free: 10 minutes
- Also pays for: Enrich by email · Enrich by phone · Enrich by LinkedIn URL · Find people at a company domain · Get a profile by up_id · Reveal full records · Export a search to a file · Enrich a CSV of emails · Enrich a CSV of LinkedIn URLs · Validate a phone number · Validate up to 100 numbers · Validate a CSV of numbers · Run an Intent Scan: 5 a month · from the same budget: Verify an email · Verify up to 100 emails

## In their words

- Their pitch: Check whether an address will accept mail before you send to it, one at a time, 100 at once or a whole file.

## Data

- Freshness: live
- What it checks: format, mail servers, mailbox
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: $250

## Rate limit

- Per second: 16.67

## Speed

- Answer: by polling

## The call

- You send: file. Optional: async
- Method: POST
- Path: /verification/bulk-csv

## About the plan

- Plan: Starter
- Who can get it: anyone

## The 6 fields the plan's answer can hold

success, bulk job ID, status URL, download URL, status, risk level

## LeadFuze's plans (6)

- [LeadFuze, $250 monthly, Starter, POST /verification/bulk-csv](https://datacircle.dev/validate-email-apis/leadfuze/250-monthly-starter-post-verification-bulk-csv/llms.txt): 17% complete, live
- [LeadFuze, $500 monthly, Growth, POST /verification/bulk-csv](https://datacircle.dev/validate-email-apis/leadfuze/500-monthly-growth-post-verification-bulk-csv/llms.txt): 17% complete, live
- [LeadFuze, $1,500 monthly, Scale, POST /verification/bulk-csv](https://datacircle.dev/validate-email-apis/leadfuze/1500-monthly-scale-post-verification-bulk-csv/llms.txt): 17% complete, live
- [LeadFuze, $2,500 yearly, Starter yearly, POST /verification/bulk-csv](https://datacircle.dev/validate-email-apis/leadfuze/2500-yearly-starter-yearly-post-verification-bulk-csv/llms.txt): 17% complete, live
- [LeadFuze, $5,000 yearly, Growth yearly, POST /verification/bulk-csv](https://datacircle.dev/validate-email-apis/leadfuze/5000-yearly-growth-yearly-post-verification-bulk-csv/llms.txt): 17% complete, live
- [LeadFuze, $15,000 yearly, Scale yearly, POST /verification/bulk-csv](https://datacircle.dev/validate-email-apis/leadfuze/15000-yearly-scale-yearly-post-verification-bulk-csv/llms.txt): 17% complete, live

## LeadFuze's calls for this API (3)

- `POST /verification/bulk-csv`: [LeadFuze, $250 monthly, Starter, POST /verification/bulk-csv](https://datacircle.dev/validate-email-apis/leadfuze/250-monthly-starter-post-verification-bulk-csv/llms.txt)
- `POST /verification/email`: [LeadFuze, $250 monthly, Starter, POST /verification/email](https://datacircle.dev/validate-email-apis/leadfuze/250-monthly-starter-post-verification-email/llms.txt)
- `POST /verification/bulk`: [LeadFuze, $250 monthly, Starter, POST /verification/bulk](https://datacircle.dev/validate-email-apis/leadfuze/250-monthly-starter-post-verification-bulk/llms.txt)

## LeadFuze's APIs (8)

- [LeadFuze: people search API pricing, 16 plans](https://datacircle.dev/people-search-apis/leadfuze/50-pack/llms.txt)
- [LeadFuze: email finder API pricing, 6 plans](https://datacircle.dev/find-email-apis/leadfuze/250-monthly/llms.txt)
- [LeadFuze: people enrichment API pricing, 6 plans](https://datacircle.dev/person-enrichment-apis/leadfuze/250-monthly/llms.txt)
- [LeadFuze: reverse email lookup API pricing, 6 plans](https://datacircle.dev/reverse-email-lookup-apis/leadfuze/250-monthly/llms.txt)
- [LeadFuze: LinkedIn profile API pricing, 6 plans](https://datacircle.dev/linkedin-profile-apis/leadfuze/250-monthly/llms.txt)
- [LeadFuze: phone finder API pricing, 6 plans, POST /enrichment/email](https://datacircle.dev/find-phone-apis/leadfuze/250-monthly-starter-post-enrichment-email/llms.txt)
- [LeadFuze: phone finder API pricing, 6 plans, POST /enrichment/linkedin](https://datacircle.dev/find-phone-apis/leadfuze/250-monthly-starter-post-enrichment-linkedin/llms.txt)
- [LeadFuze: phone validation API pricing, 6 plans, POST /phone-validation/bulk-csv](https://datacircle.dev/validate-phone-apis/leadfuze/250-monthly-starter-post-phone-validation-bulk-csv/llms.txt)
- [LeadFuze: phone validation API pricing, 6 plans, POST /phone-validation/validate](https://datacircle.dev/validate-phone-apis/leadfuze/250-monthly-starter-post-phone-validation-validate/llms.txt)
- [LeadFuze: phone validation API pricing, 6 plans, POST /phone-validation/bulk](https://datacircle.dev/validate-phone-apis/leadfuze/250-monthly-starter-post-phone-validation-bulk/llms.txt)
- [LeadFuze: email verification API pricing, 6 plans, POST /verification/bulk-csv](https://datacircle.dev/validate-email-apis/leadfuze/250-monthly-starter-post-verification-bulk-csv/llms.txt)

## LeadFuze: email verification API alternatives

- [RouterGrowth, $39 monthly](https://datacircle.dev/validate-email-apis/routergrowth/39-monthly/llms.txt): 50% complete, live
- [Snov.io, $39 monthly](https://datacircle.dev/validate-email-apis/snov-io/39-monthly/llms.txt): 33% complete, live
- [Mails.so, €498 monthly, Unlimited, POST /batch](https://datacircle.dev/validate-email-apis/mails-so/498-monthly-unlimited-post-batch/llms.txt): no limit, 67% complete, live
- [Bulk Email Checker, $250 monthly](https://datacircle.dev/validate-email-apis/bulk-email-checker/250-monthly/llms.txt): no limit, 50% 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://www.leadfuze.com/api-docs/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.leadfuze.com/pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.leadfuze.com/products/enrichment/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.leadfuze.com/terms/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing