# Qonoro, pay as you go: Email verification API

> Validates email deliverability: syntax check, MX record lookup, and SMTP server reachability. Deterministic, sub-second. x402-native.

Qonoro's Pay per call with x402 plan for the email verification API costs $5.00 per 1,000 emails. Qonoro's docs list 4 of the 6 fields on our checklist: Address, Deliverability, Confidence, Company.
We haven't run Qonoro through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
We rank 4,085 plans for email verification APIs by price. Half the plans cost $1.998 or less per 1,000 emails. This plan costs less per 1,000 emails than 22% of the 4,085 plans.
[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), [looot](https://datacircle.dev/validate-email-apis/looot/top-up/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/qonoro/pay-as-you-go
- [Email validation API: best verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://api.qonoro.ai/v1/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.qonoro.ai/v1/email/validate`
- API key: not needed
- Its API docs: https://api.qonoro.ai/v1/email/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing#/Email%20Validator/execute_agent_v1_email_validate_post
- Sold by: Qonoro (https://qonoro.ai?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-07

## In the answer

- Completeness: 67%
- Address: ✓
- Deliverability: ✓
- Confidence: ✓
- Company: ✓

## Price

- $ per 1,000 emails: $5.00
- Per: call
- Billing: pay as you go

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## In their words

- Their pitch: Validates email deliverability: syntax check, MX record lookup, and SMTP server reachability. Deterministic, sub-second. x402-native.

## Data

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

## Plan

- Pay: per call

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email. Optional: buyer_region
- Method: POST
- Path: /v1/email/validate

## About the plan

- Plan: Pay per call with x402
- Who can get it: anyone paying from a USDC wallet on Base (x402)

## The 16 fields the plan's answer can hold

request ID, email, valid, syntax valid, domain, MX found, MX records, MX host, MX priority, SMTP connectable, disposable, risk score, risk reasons, quality, cache hit, response time

## Qonoro's plans (1)

- [Qonoro, pay as you go](https://datacircle.dev/validate-email-apis/qonoro/pay-as-you-go/llms.txt): $5.00 per 1,000, 67% complete

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

- `POST /v1/email/validate`: [Qonoro, pay as you go](https://datacircle.dev/validate-email-apis/qonoro/pay-as-you-go/llms.txt)

## Qonoro's APIs (11)

- [Qonoro: business verification API pricing, 1 plan](https://datacircle.dev/business-verification-apis/qonoro/pay-as-you-go/llms.txt)
- [Qonoro: company discovery API pricing, 1 plan](https://datacircle.dev/company-discovery-apis/qonoro/pay-as-you-go/llms.txt)
- [Qonoro: company open jobs API pricing, 1 plan](https://datacircle.dev/company-open-job-apis/qonoro/pay-as-you-go/llms.txt)
- [Qonoro: similar companies API pricing, 1 plan](https://datacircle.dev/similar-company-apis/qonoro/pay-as-you-go/llms.txt)
- [Qonoro: tech stack API pricing, 1 plan](https://datacircle.dev/company-technology-apis/qonoro/pay-as-you-go/llms.txt)
- [Qonoro: domain WHOIS API pricing, 1 plan](https://datacircle.dev/domain-whois-apis/qonoro/pay-as-you-go/llms.txt)
- [Qonoro: email verification API pricing, 1 plan](https://datacircle.dev/validate-email-apis/qonoro/pay-as-you-go/llms.txt)
- [Qonoro: people search API pricing, 1 plan](https://datacircle.dev/people-search-apis/qonoro/pay-as-you-go/llms.txt)
- [Qonoro: people enrichment API pricing, 1 plan](https://datacircle.dev/person-enrichment-apis/qonoro/pay-as-you-go/llms.txt)
- [Qonoro: phone validation API pricing, 1 plan](https://datacircle.dev/validate-phone-apis/qonoro/pay-as-you-go/llms.txt)
- [Qonoro: company enrichment API pricing, 1 plan, POST /v1/company/enrich](https://datacircle.dev/company-enrichment-apis/qonoro/pay-as-you-go-pay-per-call-with-x402-post-v1-company-enrich/llms.txt)
- [Qonoro: company enrichment API pricing, 1 plan, POST /v1/company/research](https://datacircle.dev/company-enrichment-apis/qonoro/pay-as-you-go-pay-per-call-with-x402-post-v1-company-research/llms.txt)

## Qonoro: email verification API alternatives

- [MillionPhones, top-up from $5](https://datacircle.dev/validate-email-apis/millionphones/top-up-from-5/llms.txt): $5.00 per 1,000, 33% complete, live
- [NullBounce, $5 pack](https://datacircle.dev/validate-email-apis/nullbounce/5-pack/llms.txt): $5.00 per 1,000, 33% complete, live
- [Qualisend, $5 monthly, Pro, 1,000 credits a month, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/5-monthly-pro-1000-credits-a-month-post-verify-bulk/llms.txt): $5.00 per 1,000, 50% complete, live
- [MailProbe, $5 pack](https://datacircle.dev/validate-email-apis/mailprobe/5-pack/llms.txt): $5.00 per 1,000, 50% complete, live
- [Greeneris, pay as you go](https://datacircle.dev/validate-email-apis/greeneris/pay-as-you-go/llms.txt): $5.00 per 1,000, 50% complete, 1 hour

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-07.

- https://api.qonoro.ai/v1/email/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://api.qonoro.ai/v1/email/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://api.qonoro.ai/v1/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://qonoro.ai?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://qonoro.ai/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://qonoro.ai/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing