# KaijuVerifier, free, Free, POST /api/v1/verify-batch: Cached email verification API

> Block fake signups, burner accounts, and hard bounces at the edge in 3 lines of code.

KaijuVerifier's cached 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.

- This page: https://datacircle.dev/cached-email-validation-apis/kaijuverifier/free-free-post-api-v1-verify-batch
- Get it: https://kaijuverifier.com/pricing
- Its API docs: https://kaijuverifier.com/api-docs
- Sold by: KaijuVerifier (https://kaijuverifier.com)
- Checked: 2026-10-20

## In the answer

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

## Price

- $ per 1,000: $0.00
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Per: result
- Also pays for: from the same budget: Verify a single email (authenticated) · Submit an async bulk job · Verify a single email with the SMTP probe (authenticated) · Verify a batch synchronously with the SMTP probe · Submit an async bulk job with the SMTP probe

## Not found

- $ per 1,000: $0.00

## Catch-all

- $ per 1,000: $0.00

## Bounce

- Bounce refund: the verification credits in full, when the campaign's hard-bounce rate exceeds 2% on addresses verified as Valid

## In their words

- Their pitch: Block fake signups, burner accounts, and hard bounces at the edge in 3 lines of code.

## Data

- Freshness: stored (DNS valid, MX count, MX providers, MX grade: live)
- Keep data: no limit
- Use data: You agree NOT to use the Service for: Sending SPAM or unsolicited bulk emails, Verifying email lists obtained illegally or without consent, Any activity that violates GDPR, CAN-SPAM, or other data protection laws, Attempting to reverse engineer, hack, or abuse the Service, Reselling or redistributing verification results without authorization

## Plan

- Pay: $0
- You get: 100 credits a month
- Enough for: 100 results a month

## Rate limit

- Batch: 10,000

## Speed

- Answer: in the call

## The call

- You send: emails. Optional: use_smtp
- Method: POST
- Path: /api/v1/verify-batch

## About the plan

- Plan: Free
- Who can get it: anyone

## The 28 fields the plan's answer can hold

success, batch ID, batch status, emails checked, valid emails, invalid emails, accuracy, email, normalized email, safe to send, status, reason, confidence, score, grade, did you mean, syntax valid, DNS valid, catch-all, disposable, role address, free provider, MX count, MX providers, MX grade, quota limit, quota used this month, quota remaining

## KaijuVerifier's plans (12)

- [KaijuVerifier, free, Free, POST /api/v1/verify-batch](https://datacircle.dev/cached-email-validation-apis/kaijuverifier/free-free-post-api-v1-verify-batch/llms.txt): $0.00 per 1,000, 50% complete, stored (DNS valid, MX count, MX providers, MX grade: live)
- [KaijuVerifier, $19 pack, 5,000 Credits, POST /api/v1/verify-batch](https://datacircle.dev/cached-email-validation-apis/kaijuverifier/19-pack-5000-credits-post-api-v1-verify-batch/llms.txt): $3.80 per 1,000, 50% complete, stored (DNS valid, MX count, MX providers, MX grade: live)
- [KaijuVerifier, $79 pack, 25,000 Credits, POST /api/v1/verify-batch](https://datacircle.dev/cached-email-validation-apis/kaijuverifier/79-pack-25000-credits-post-api-v1-verify-batch/llms.txt): $3.16 per 1,000, 50% complete, stored (DNS valid, MX count, MX providers, MX grade: live)
- [KaijuVerifier, $249 pack, 100,000 Credits, POST /api/v1/verify-batch](https://datacircle.dev/cached-email-validation-apis/kaijuverifier/249-pack-100000-credits-post-api-v1-verify-batch/llms.txt): $2.49 per 1,000, 50% complete, stored (DNS valid, MX count, MX providers, MX grade: live)
- [KaijuVerifier, $899 pack, 500,000 Credits, POST /api/v1/verify-batch](https://datacircle.dev/cached-email-validation-apis/kaijuverifier/899-pack-500000-credits-post-api-v1-verify-batch/llms.txt): $1.798 per 1,000, 50% complete, stored (DNS valid, MX count, MX providers, MX grade: live)
- [KaijuVerifier, $19 monthly, Starter, POST /api/v1/verify-batch](https://datacircle.dev/cached-email-validation-apis/kaijuverifier/19-monthly-starter-post-api-v1-verify-batch/llms.txt): $1.90 per 1,000, 50% complete, stored (DNS valid, MX count, MX providers, MX grade: live)
- [KaijuVerifier, $49 monthly, Growth, POST /api/v1/verify-batch](https://datacircle.dev/cached-email-validation-apis/kaijuverifier/49-monthly-growth-post-api-v1-verify-batch/llms.txt): $0.98 per 1,000, 50% complete, stored (DNS valid, MX count, MX providers, MX grade: live)
- [KaijuVerifier, $149 monthly, Scale, POST /api/v1/verify-batch](https://datacircle.dev/cached-email-validation-apis/kaijuverifier/149-monthly-scale-post-api-v1-verify-batch/llms.txt): $0.596 per 1,000, 50% complete, stored (DNS valid, MX count, MX providers, MX grade: live)
- [KaijuVerifier, $182.04 yearly, Starter, POST /api/v1/verify-batch](https://datacircle.dev/cached-email-validation-apis/kaijuverifier/182-04-yearly-starter-post-api-v1-verify-batch/llms.txt): $1.517 per 1,000, 50% complete, stored (DNS valid, MX count, MX providers, MX grade: live)
- [KaijuVerifier, $470.04 yearly, Growth, POST /api/v1/verify-batch](https://datacircle.dev/cached-email-validation-apis/kaijuverifier/470-04-yearly-growth-post-api-v1-verify-batch/llms.txt): $0.783 per 1,000, 50% complete, stored (DNS valid, MX count, MX providers, MX grade: live)
- [KaijuVerifier, $1,430.04 yearly, Scale, POST /api/v1/verify-batch](https://datacircle.dev/cached-email-validation-apis/kaijuverifier/1430-04-yearly-scale-post-api-v1-verify-batch/llms.txt): $0.477 per 1,000, 50% complete, stored (DNS valid, MX count, MX providers, MX grade: live)
- [KaijuVerifier, contact us, Enterprise, POST /api/v1/verify-batch](https://datacircle.dev/cached-email-validation-apis/kaijuverifier/contact-us-enterprise-post-api-v1-verify-batch/llms.txt): 50% complete, stored (DNS valid, MX count, MX providers, MX grade: live)

## KaijuVerifier's calls (3)

- `POST /api/v1/jobs`: [KaijuVerifier, free, Free, POST /api/v1/jobs](https://datacircle.dev/cached-email-validation-apis/kaijuverifier/free-free-post-api-v1-jobs/llms.txt)
- `POST /api/v1/verify-batch`: [KaijuVerifier, free, Free, POST /api/v1/verify-batch](https://datacircle.dev/cached-email-validation-apis/kaijuverifier/free-free-post-api-v1-verify-batch/llms.txt)
- `POST /api/v1/verify-single`: [KaijuVerifier, free, Free, POST /api/v1/verify-single](https://datacircle.dev/cached-email-validation-apis/kaijuverifier/free-free-post-api-v1-verify-single/llms.txt)

## KaijuVerifier's APIs (2)

- [KaijuVerifier: cached email verification API pricing, 12 plans, POST /api/v1/verify-batch](https://datacircle.dev/cached-email-validation-apis/kaijuverifier/free-free-post-api-v1-verify-batch/llms.txt)
- [KaijuVerifier: email verification API pricing, 12 plans, POST /api/v1/jobs](https://datacircle.dev/validate-email-apis/kaijuverifier/free-free-post-api-v1-jobs/llms.txt)
- [KaijuVerifier: email verification API pricing, 12 plans, POST /api/v1/verify-batch](https://datacircle.dev/validate-email-apis/kaijuverifier/free-free-post-api-v1-verify-batch/llms.txt)
- [KaijuVerifier: email verification API pricing, 12 plans, POST /api/v1/verify-single](https://datacircle.dev/validate-email-apis/kaijuverifier/free-free-post-api-v1-verify-single/llms.txt)

## KaijuVerifier: cached email verification API alternatives

- [graph8, free](https://datacircle.dev/cached-email-validation-apis/graph8/free/llms.txt): $0.00 per 1,000, 33% complete, stored
- [Strale, free, trial credits, POST /v1/do, Bulk Email Validation](https://datacircle.dev/cached-email-validation-apis/strale/free-trial-credits-post-v1-do-bulk-email-validation/llms.txt): $0.00 per 1,000, 50% complete, stored
- [APIVerve, free](https://datacircle.dev/cached-email-validation-apis/apiverve/free/llms.txt): $0.00 per 1,000, 50% complete, stored (MX valid, MX record, null MX, can receive mail, has SPF, has DMARC: live)
- [Botoi, free, Free, POST /v1/disposable-email/check](https://datacircle.dev/cached-email-validation-apis/botoi/free-free-post-v1-disposable-email-check/llms.txt): $0.00 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 2026-10-20.

- https://kaijuverifier.com/api-docs
- https://kaijuverifier.com/dashboard/billing
- https://kaijuverifier.com/email-verification-api
- https://kaijuverifier.com/legal/notice
- https://kaijuverifier.com/legal/terms
- https://kaijuverifier.com/openapi.json
- https://kaijuverifier.com/pricing