# KingMinos, free: Email verification API

> You get back whether the mailbox is deliverable: valid, invalid, catch_all or unknown. Use it for list hygiene before a send.

KingMinos's Free plan for the email verification API costs $0.00 per 1,000 emails. We check each provider's docs for 6 fields. KingMinos's docs list 3: Address, Deliverability, Confidence.
We haven't run KingMinos through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
This plan is free. We rank 4,382 plans for email verification APIs by price. Half the plans cost $2.00 or less per 1,000 emails. [See the best free email verification API plan.](https://datacircle.dev/best-email-verification-api.txt)
[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. [StableEnrich's pay-as-you-go plan](https://datacircle.dev/validate-email-apis/stableenrich/pay-as-you-go-pay-per-request-with-x402-or-mpp-post-api-minerva-validate-emails/llms.txt) costs the least for 10,000 emails a month: $0.05.
[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.
[pingutil](https://datacircle.dev/validate-email-apis/pingutil/free-api-key-post-v1-verify/llms.txt), [Validemail.co](https://datacircle.dev/validate-email-apis/validemail-co/9-90-monthly-9-90-month-get-api-v1-validate/llms.txt) and [looot](https://datacircle.dev/validate-email-apis/looot/top-up/llms.txt) are the best email verification API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/kingminos/free
- [Email validation API: best verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://kingminos.com/pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.kingminos.com/v1/email/verify`
- API key: with the plan, on https://kingminos.com/pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://kingminos.com/docs/api/email-verify/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: KingMinos (https://kingminos.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-09

## In the answer

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

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Repeat free: never
- Also pays for: from the same budget: Company resolve · Company icon · Company description · Company B2B social · Person name · Person title · Person phone · Person language · Person B2B social · Person email · Company X account · Company domain · Company hierarchy · Person verify employment

## Not found

- $ per 1,000: $0.00

## Catch-all

- $ per 1,000: $0.00

## In their words

- Their pitch: You get back whether the mailbox is deliverable: valid, invalid, catch_all or unknown. Use it for list hygiene before a send.

## Data

- Freshness: live
- What it checks: format, mail servers, disposable domains, role addresses, mailbox
- Keep data: We grant you a limited, non-exclusive, non-transferable licence to use Results for internal business use only, for as long as your account is in good standing. [...] If we tell you that a person has opted out, objected, or asked to be deleted, you must delete or suppress affected Results within 30 days and stop using them
- Use data: We grant you a limited, non-exclusive, non-transferable licence to use Results for internal business use only [...]. You may not: resell, redistribute, or publish Results, including as a standalone dataset, or include them in a product you sell, build a competing contact database or a substitute for the Service, use Results for consumer purposes, use Results to make decisions about credit, employment, insurance, housing, or any other eligibility decision covered by the Fair Credit Reporting Act or similar laws

## Plan

- Pay: $0
- You get: 10 credits a day
- Enough for: 10 calls a day
- Expires: unused daily credits expire at midnight UTC

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email. Optional: min_confidence, routing.path, routing.only, routing.ignore, routing.max_provider_credits, dry_run
- Method: POST
- Path: /v1/email/verify

## About the plan

- Plan: Free
- Who can get it: anyone with a verified work email address (personal and disposable addresses get no free credits, and only the first workspace on a company's email domain gets them)

## The 12 fields the plan's answer can hold

decision, outcome, confidence, status, email, source, flags, MX provider, checked at, candidates, credits spent, hops

## KingMinos's plans (7)

- [KingMinos, free](https://datacircle.dev/validate-email-apis/kingminos/free/llms.txt): $0.00 per 1,000, 50% complete, live
- [KingMinos, pay as you go](https://datacircle.dev/validate-email-apis/kingminos/pay-as-you-go/llms.txt): $100.00 per 1,000, 50% complete, live
- [KingMinos, $99 monthly](https://datacircle.dev/validate-email-apis/kingminos/99-monthly/llms.txt): $82.50 per 1,000, 50% complete, live
- [KingMinos, $249 monthly](https://datacircle.dev/validate-email-apis/kingminos/249-monthly/llms.txt): $75.454 per 1,000, 50% complete, live
- [KingMinos, $499 monthly](https://datacircle.dev/validate-email-apis/kingminos/499-monthly/llms.txt): $66.533 per 1,000, 50% complete, live
- [KingMinos, $999 monthly](https://datacircle.dev/validate-email-apis/kingminos/999-monthly/llms.txt): $60.545 per 1,000, 50% complete, live
- [KingMinos, contact us](https://datacircle.dev/validate-email-apis/kingminos/contact-us/llms.txt): 50% complete, live

## KingMinos's calls for this API (1)

- `POST /v1/email/verify`: [KingMinos, free](https://datacircle.dev/validate-email-apis/kingminos/free/llms.txt)

## KingMinos's APIs (7)

- [KingMinos: company hierarchy API pricing, 7 plans](https://datacircle.dev/company-hierarchy-apis/kingminos/free/llms.txt)
- [KingMinos: email verification API pricing, 7 plans](https://datacircle.dev/validate-email-apis/kingminos/free/llms.txt)
- [KingMinos: email finder API pricing, 7 plans](https://datacircle.dev/find-email-apis/kingminos/free/llms.txt)
- [KingMinos: phone finder API pricing, 7 plans](https://datacircle.dev/find-phone-apis/kingminos/free/llms.txt)
- [KingMinos: reverse email lookup API pricing, 7 plans](https://datacircle.dev/reverse-email-lookup-apis/kingminos/free/llms.txt)
- [KingMinos: company enrichment API pricing, 7 plans, POST /v1/company/b2b-social](https://datacircle.dev/company-enrichment-apis/kingminos/free-post-v1-company-b2b-social/llms.txt)
- [KingMinos: company enrichment API pricing, 7 plans, POST /v1/company/description](https://datacircle.dev/company-enrichment-apis/kingminos/free-post-v1-company-description/llms.txt)
- [KingMinos: company enrichment API pricing, 7 plans, POST /v1/company/icon](https://datacircle.dev/company-enrichment-apis/kingminos/free-post-v1-company-icon/llms.txt)
- [KingMinos: company enrichment API pricing, 7 plans, POST /v1/company/resolve](https://datacircle.dev/company-enrichment-apis/kingminos/free-post-v1-company-resolve/llms.txt)
- [KingMinos: people enrichment API pricing, 7 plans, POST /v1/person/language](https://datacircle.dev/person-enrichment-apis/kingminos/free-post-v1-person-language/llms.txt)
- [KingMinos: people enrichment API pricing, 7 plans, POST /v1/person/name](https://datacircle.dev/person-enrichment-apis/kingminos/free-post-v1-person-name/llms.txt)
- [KingMinos: people enrichment API pricing, 7 plans, POST /v1/person/title](https://datacircle.dev/person-enrichment-apis/kingminos/free-post-v1-person-title/llms.txt)

## KingMinos: email verification API alternatives

- [PeopleDB, $3,000 pack, 50,000 credits, POST /email_verifications](https://datacircle.dev/validate-email-apis/peopledb/3000-pack-50000-credits-post-email-verifications/llms.txt): $60.00 per 1,000, 50% complete, live
- [Defastra, top-up, Pay as you go, next 15,000 requests a month](https://datacircle.dev/validate-email-apis/defastra/top-up-pay-as-you-go-next-15000-requests-a-month/llms.txt): $60.00 per 1,000, 67% complete, live
- [Ideal Postcodes, £9 pack](https://datacircle.dev/validate-email-apis/ideal-postcodes/9-pack/llms.txt): $60.008 per 1,000, 17% complete, live
- [Tomba, $2,035 pack, Scale 200k, GET /email-verifier, Email Verifier, full](https://datacircle.dev/validate-email-apis/tomba/2035-pack-scale-200k-get-email-verifier-email-verifier-full/llms.txt): $61.05 per 1,000, 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 2026-11-09.

- https://api.kingminos.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://kingminos.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://kingminos.com/acceptable-use/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://kingminos.com/docs/api/authentication/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://kingminos.com/docs/api/email-verify/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://kingminos.com/pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://kingminos.com/terms/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing