# skink, free, Start here, free, POST /v1/bulk: Email verification API

> Evidence behind every verdict. Even the catch-alls.

skink's email verification API on its "Start here, free" plan. It costs $0.00 per 1,000 emails. It returns 3 of the 6 key fields we check: Address, Deliverability, Confidence.
In [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt), the best plan from skink scores 45.6 out of 100. skink ranks 89th of 181 providers.
This plan is free. We rank 3,753 plans for email verification APIs by price. Half the plans cost $1.98 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.
[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 the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/skink/free-start-here-free-post-v1-bulk
- [Email validation API: 180+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://skink.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.skink.dev/v1/bulk`
- API key: with the plan, on https://skink.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://skink.dev/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: skink (https://skink.dev?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

- Repeat free: never
- Also pays for: from the same budget: Verify

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## Catch-all

- $ per 1,000: $0.00

## In their words

- Their pitch: Evidence behind every verdict. Even the catch-alls.

## Data

- What it checks: format, mail servers, disposable domains, role addresses, mailbox
- Keep data: no limit
- Use data: To verify email addresses you have a lawful basis to process, including your own contact lists, opt-in subscribers, and legitimately-sourced sales prospects, a deliverable result does not constitute consent or permission to send email, and you hold your own lawful basis and consents under applicable law. You may not use the Service to: submit addresses obtained from an unlawful source, including illegally scraped, harvested, or purchased-without-rights lists, or through any other unlawful data-acquisition method, facilitate spam, phishing, credential-stuffing or other credential-based attacks, harassment, or any other unlawful activity, perform mass account-existence enumeration unrelated to assessing your own list's deliverability, resell or repackage raw verification results as a standalone address-enumeration or people-lookup service, circumvent rate limits, or create multiple accounts to exceed limits or abuse free-tier credits, attempt to circumvent a recipient mail provider's security, anti-abuse, or anti-spam controls through your use of the Service

## Plan

- Pay: $0
- You get: 100 credits
- Enough for: 100 results, once
- Expires: never

## Rate limit

- Batch: 50,000

## Speed

- Answer: by polling or webhook

## The call

- You send: one of source.emails or source.file_id, Content-Type header "application/json". Optional: callback_url, fast_fail, skip_catchall_probes
- Method: POST
- Path: /v1/bulk

## About the plan

- Plan: Start here, free
- Who can get it: business customers only: the Service is offered on a business-to-business basis only and is not directed at consumers acting for personal, family, or household purposes

## The 17 fields the plan's answer can hold

email address, status, sub-status, confidence, did you mean, free, role, disposable, safe to send, accept all, risk score, risks, MX provider, recommendation, model version, processed at, duration

## skink's plans (7)

- [skink, free, Start here, free, POST /v1/bulk](https://datacircle.dev/validate-email-apis/skink/free-start-here-free-post-v1-bulk/llms.txt): $0.00 per 1,000, 50% complete
- [skink, $49 pack, Growth, POST /v1/bulk](https://datacircle.dev/validate-email-apis/skink/49-pack-growth-post-v1-bulk/llms.txt): $4.90 per 1,000, 50% complete
- [skink, $199 pack, Scale, POST /v1/bulk](https://datacircle.dev/validate-email-apis/skink/199-pack-scale-post-v1-bulk/llms.txt): $3.98 per 1,000, 50% complete
- [skink, $599 pack, Volume, POST /v1/bulk](https://datacircle.dev/validate-email-apis/skink/599-pack-volume-post-v1-bulk/llms.txt): $2.995 per 1,000, 50% complete
- [skink, $1,299 pack, Business, POST /v1/bulk](https://datacircle.dev/validate-email-apis/skink/1299-pack-business-post-v1-bulk/llms.txt): $2.598 per 1,000, 50% complete
- [skink, $1,999 pack, Max, POST /v1/bulk](https://datacircle.dev/validate-email-apis/skink/1999-pack-max-post-v1-bulk/llms.txt): $1.999 per 1,000, 50% complete
- [skink, contact us, Enterprise, POST /v1/bulk](https://datacircle.dev/validate-email-apis/skink/contact-us-enterprise-post-v1-bulk/llms.txt): 50% complete

## skink's calls (2)

- `POST /v1/bulk`: [skink, free, Start here, free, POST /v1/bulk](https://datacircle.dev/validate-email-apis/skink/free-start-here-free-post-v1-bulk/llms.txt)
- `POST /v1/verify`: [skink, free, Start here, free, POST /v1/verify](https://datacircle.dev/validate-email-apis/skink/free-start-here-free-post-v1-verify/llms.txt)

## skink's APIs (1)

- [skink: email verification API pricing, 7 plans, POST /v1/bulk](https://datacircle.dev/validate-email-apis/skink/free-start-here-free-post-v1-bulk/llms.txt)

## skink: email verification API alternatives

- [ZeroBounce, $23,988 yearly, ZeroBounce ONE annually, 1,000,000 credits a month, POST /v2/validatebatch](https://datacircle.dev/validate-email-apis/zerobounce/23988-yearly-zerobounce-one-annually-1000000-credits-a-month-post-v2-validatebatch/llms.txt): $1.999 per 1,000, 83% complete, live
- [1Lookup, $1,999 monthly, Enterprise, POST /bulk/jobs](https://datacircle.dev/validate-email-apis/1lookup/1999-monthly-enterprise-post-bulk-jobs/llms.txt): $1.999 per 1,000, 67% complete, live
- [Cloudmersive, $19.99 monthly](https://datacircle.dev/validate-email-apis/cloudmersive/19-99-monthly/llms.txt): $1.999 per 1,000, 33% complete, live
- [Searlo, $29.99 pack](https://datacircle.dev/validate-email-apis/searlo/29-99-pack/llms.txt): $1.999 per 1,000, 50% complete

## 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://skink.dev/acceptable-use?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://skink.dev/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://skink.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://skink.dev/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing