# SendSure, free, POST /api/verify/batch: Email verification API

> One REST call verifies emails at signup, checkout, and CRM — blocking bad data before it reaches your list.

SendSure's email verification API on its Free plan. It costs $0.00 per 1,000 emails. It returns 3 of the 6 key fields we check: Address, Deliverability, Confidence.
We haven't run SendSure through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
This plan is free. We rank 3,886 plans for email verification APIs by price. Half the plans cost $1.998 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.
[email-validation.org](https://datacircle.dev/validate-email-apis/email-validation-org/450-pack-1000000-credits-post-v1-validate/llms.txt), [pingutil](https://datacircle.dev/validate-email-apis/pingutil/free-api-key-post-v1-verify/llms.txt) and [MailTester Ninja](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt) are the best email verification API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/sendsure/free-post-api-verify-batch
- [Email validation API: 180+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://sendsure.ai/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.sendsure.ai/api/verify/batch`
- API key: with the plan, on https://sendsure.ai/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://sendsure.ai/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing#tag/email-verification/POST/api/verify/batch
- Sold by: SendSure (https://sendsure.ai?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 50%
- Address: ✓
- Deliverability: ✓
- Confidence: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Verify a single email address · Start processing a job · Score a single email · Batch score up to 1000 emails

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: One REST call verifies emails at signup, checkout, and CRM — blocking bad data before it reaches your list.

## Data

- What it checks: format, mail servers, disposable domains, role addresses, mailbox
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: $0
- You get: 10 credits
- Enough for: 10 results

## Rate limit

- Per second: 0.028
- Batch: 100

## Speed

- Answer: in the call

## The call

- You send: emails
- Method: POST
- Path: /api/verify/batch

## About the plan

- Plan: Free
- Who can get it: anyone

## The 33 fields the plan's answer can hold

email address, result, valid, status, sub-status code, status label, score, confidence, quality score, risk band, reason, reason code, flags, did you mean, standard status, standard status label, recommended action, technical status, technical details, action bucket, action status, action recommendation, action basis, billable, time taken, total, valid count, invalid count, unknown count, billable count, non-billable count, action summary, credits remaining

## SendSure's plans (27)

- [SendSure, free, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/free-post-api-verify-batch/llms.txt): $0.00 per 1,000, 50% complete
- [SendSure, $5 pack, Starter 1K credits, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/5-pack-starter-1k-credits-post-api-verify-batch/llms.txt): $5.00 per 1,000, 50% complete
- [SendSure, $19 pack, Starter 5K credits, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/19-pack-starter-5k-credits-post-api-verify-batch/llms.txt): $3.80 per 1,000, 50% complete
- [SendSure, $30 pack, Starter 10K credits, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/30-pack-starter-10k-credits-post-api-verify-batch/llms.txt): $3.00 per 1,000, 50% complete
- [SendSure, $60 pack, Starter 25K credits, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/60-pack-starter-25k-credits-post-api-verify-batch/llms.txt): $2.40 per 1,000, 50% complete
- [SendSure, $109 pack, Starter 50K credits, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/109-pack-starter-50k-credits-post-api-verify-batch/llms.txt): $2.18 per 1,000, 50% complete
- [SendSure, $207 pack, Starter 100K credits, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/207-pack-starter-100k-credits-post-api-verify-batch/llms.txt): $2.07 per 1,000, 50% complete
- [SendSure, $427 pack, Starter 250K credits, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/427-pack-starter-250k-credits-post-api-verify-batch/llms.txt): $1.708 per 1,000, 50% complete
- [SendSure, $549 pack, Starter 500K credits, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/549-pack-starter-500k-credits-post-api-verify-batch/llms.txt): $1.098 per 1,000, 50% complete
- [SendSure, $732 pack, Starter 1M credits, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/732-pack-starter-1m-credits-post-api-verify-batch/llms.txt): $0.732 per 1,000, 50% complete
- [SendSure, $17 monthly, Growth Monthly, up to 5,000 / month, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/17-monthly-growth-monthly-up-to-5000-month-post-api-verify-batch/llms.txt): $3.40 per 1,000, 50% complete
- [SendSure, $27 monthly, Growth Monthly, up to 10,000 / month, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/27-monthly-growth-monthly-up-to-10000-month-post-api-verify-batch/llms.txt): $2.70 per 1,000, 50% complete
- [SendSure, $54 monthly, Growth Monthly, up to 25,000 / month, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/54-monthly-growth-monthly-up-to-25000-month-post-api-verify-batch/llms.txt): $2.16 per 1,000, 50% complete
- [SendSure, $98 monthly, Growth Monthly, up to 50,000 / month, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/98-monthly-growth-monthly-up-to-50000-month-post-api-verify-batch/llms.txt): $1.96 per 1,000, 50% complete
- [SendSure, $186 monthly, Growth Monthly, up to 100,000 / month, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/186-monthly-growth-monthly-up-to-100000-month-post-api-verify-batch/llms.txt): $1.86 per 1,000, 50% complete
- [SendSure, $384 monthly, Growth Monthly, up to 250,000 / month, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/384-monthly-growth-monthly-up-to-250000-month-post-api-verify-batch/llms.txt): $1.536 per 1,000, 50% complete
- [SendSure, $494 monthly, Growth Monthly, up to 500,000 / month, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/494-monthly-growth-monthly-up-to-500000-month-post-api-verify-batch/llms.txt): $0.988 per 1,000, 50% complete
- [SendSure, $659 monthly, Growth Monthly, up to 1,000,000 / month, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/659-monthly-growth-monthly-up-to-1000000-month-post-api-verify-batch/llms.txt): $0.659 per 1,000, 50% complete
- [SendSure, $180 yearly, Growth Yearly, up to 5,000 / month, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/180-yearly-growth-yearly-up-to-5000-month-post-api-verify-batch/llms.txt): $3.00 per 1,000, 50% complete
- [SendSure, $300 yearly, Growth Yearly, up to 10,000 / month, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/300-yearly-growth-yearly-up-to-10000-month-post-api-verify-batch/llms.txt): $2.50 per 1,000, 50% complete
- [SendSure, $588 yearly, Growth Yearly, up to 25,000 / month, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/588-yearly-growth-yearly-up-to-25000-month-post-api-verify-batch/llms.txt): $1.96 per 1,000, 50% complete
- [SendSure, $1,056 yearly, Growth Yearly, up to 50,000 / month, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/1056-yearly-growth-yearly-up-to-50000-month-post-api-verify-batch/llms.txt): $1.76 per 1,000, 50% complete
- [SendSure, $2,004 yearly, Growth Yearly, up to 100,000 / month, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/2004-yearly-growth-yearly-up-to-100000-month-post-api-verify-batch/llms.txt): $1.67 per 1,000, 50% complete
- [SendSure, $4,152 yearly, Growth Yearly, up to 250,000 / month, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/4152-yearly-growth-yearly-up-to-250000-month-post-api-verify-batch/llms.txt): $1.384 per 1,000, 50% complete
- [SendSure, $5,340 yearly, Growth Yearly, up to 500,000 / month, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/5340-yearly-growth-yearly-up-to-500000-month-post-api-verify-batch/llms.txt): $0.89 per 1,000, 50% complete
- [SendSure, $7,116 yearly, Growth Yearly, up to 1,000,000 / month, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/7116-yearly-growth-yearly-up-to-1000000-month-post-api-verify-batch/llms.txt): $0.593 per 1,000, 50% complete
- [SendSure, contact us, Custom, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/contact-us-custom-post-api-verify-batch/llms.txt): 50% complete

## SendSure's calls (5)

- `POST /api/scoring/batch`: [SendSure, free, POST /api/scoring/batch](https://datacircle.dev/validate-email-apis/sendsure/free-post-api-scoring-batch/llms.txt)
- `POST /api/scoring/score`: [SendSure, free, POST /api/scoring/score](https://datacircle.dev/validate-email-apis/sendsure/free-post-api-scoring-score/llms.txt)
- `POST /api/jobs/{jobId}/process`: [SendSure, free, POST /api/jobs/{jobId}/process](https://datacircle.dev/validate-email-apis/sendsure/free-post-api-jobs-jobid-process/llms.txt)
- `POST /api/verify/batch`: [SendSure, free, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/free-post-api-verify-batch/llms.txt)
- `POST /api/verify/single`: [SendSure, free, POST /api/verify/single](https://datacircle.dev/validate-email-apis/sendsure/free-post-api-verify-single/llms.txt)

## SendSure's APIs (1)

- [SendSure: email verification API pricing, 27 plans, POST /api/verify/batch](https://datacircle.dev/validate-email-apis/sendsure/free-post-api-verify-batch/llms.txt)

## SendSure: email verification API alternatives

- [MailVeri, $59 pack, 100,000 credits, POST /verify-mail/](https://datacircle.dev/validate-email-apis/mailveri/59-pack-100000-credits-post-verify-mail/llms.txt): $0.59 per 1,000, 50% complete, live
- [API Ninjas, $59 monthly](https://datacircle.dev/validate-email-apis/api-ninjas/59-monthly/llms.txt): $0.59 per 1,000, 50% complete, stored
- [EmailListVerify, $594 monthly, 1,000,000 credits, POST /api/verifyApiFile](https://datacircle.dev/validate-email-apis/emaillistverify/594-monthly-1000000-credits-post-api-verifyapifile/llms.txt): $0.594 per 1,000, 50% complete, live
- [KaijuVerifier, $149 monthly, Scale, POST /api/v1/jobs, Submit an async bulk job](https://datacircle.dev/validate-email-apis/kaijuverifier/149-monthly-scale-post-api-v1-jobs-submit-an-async-bulk-job/llms.txt): $0.596 per 1,000, 50% 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 2026-11-02.

- https://api.sendsure.ai/api/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://api.sendsure.ai/api/docs/openapi.yaml?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://sendsure.ai/_next/static/chunks/33-b0mh2va2pf.js?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://sendsure.ai/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://sendsure.ai/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://sendsure.ai/docs/api-guides/api-errors-rate-limits-and-retries?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://sendsure.ai/docs/billing-and-admin/credits-and-billing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://sendsure.ai/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://sendsure.ai/terms-of-service?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing