# CrowdSpark, pay as you go, x402 pay per call, POST /v1/email/check/batch: Email verification API

> Batch email validation for list cleaning: up to 10 addresses per call, 40% cheaper than 10 single calls. JSON body {emails:[...]}. Each item gets syntax, MX, disposable, role and free-provider checks and a deliverable_guess. Bad items return per-item errors, not a failed call.

CrowdSpark's x402 pay per call plan for the email verification API costs $0.60 per 1,000 emails. We check each provider's docs for 6 fields. CrowdSpark's docs list 1: Deliverability.
We haven't run CrowdSpark through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
We rank 4,337 plans for email verification APIs by price. Half the plans cost $2.00 or less per 1,000 emails. This plan costs less per 1,000 emails than 82% of the 4,337 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), [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/crowdspark/pay-as-you-go-x402-pay-per-call-post-v1-email-check-batch
- [Email validation API: best verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://agents.crowdspark.me/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://agents.crowdspark.me/v1/email/check/batch`
- API key: not needed
- Its API docs: https://agents.crowdspark.me/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing#/paths/~1v1~1email~1check~1batch
- Sold by: CrowdSpark (https://crowdspark.me?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-09

## In the answer

- Completeness: 17%
- Deliverability: ✓

## Price

- $ per 1,000 emails: $0.60
- Per: result
- Billing: pay as you go

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## In their words

- Their pitch: Batch email validation for list cleaning: up to 10 addresses per call, 40% cheaper than 10 single calls. JSON body {emails:[...]}. Each item gets syntax, MX, disposable, role and free-provider checks and a deliverable_guess. Bad items return per-item errors, not a failed call.

## Data

- What it checks: format, mail servers, disposable domains, role addresses
- Keep data: no limit
- Use data: No unlawful use, no attempts to attack or overload the service or upstream sources, no scraping that breaks a target site's terms. We may rate-limit or block abusive traffic.

## Plan

- Pay: per call

## Rate limit

- Batch: 10

## Speed

- Answer: in the call

## The call

- You send: emails
- Method: POST
- Path: /v1/email/check/batch

## About the plan

- Plan: x402 pay per call
- Who can get it: anyone with a wallet paying each call in USDC on Base (x402), with no account or API key

## The 11 fields the plan's answer can hold

count, succeeded, failed, input, ok, valid syntax, MX record, disposable, role account, free provider, deliverable guess

## CrowdSpark's plans (1)

- [CrowdSpark, pay as you go, x402 pay per call, POST /v1/email/check/batch](https://datacircle.dev/validate-email-apis/crowdspark/pay-as-you-go-x402-pay-per-call-post-v1-email-check-batch/llms.txt): $0.60 per 1,000, 17% complete

## CrowdSpark's calls for this API (3)

- `GET /v1/email/check`: [CrowdSpark, pay as you go, x402 pay per call, GET /v1/email/check](https://datacircle.dev/validate-email-apis/crowdspark/pay-as-you-go-x402-pay-per-call-get-v1-email-check/llms.txt)
- `POST /v1/email/check/batch`: [CrowdSpark, pay as you go, x402 pay per call, POST /v1/email/check/batch](https://datacircle.dev/validate-email-apis/crowdspark/pay-as-you-go-x402-pay-per-call-post-v1-email-check-batch/llms.txt)
- `GET /v1/email/full`: [CrowdSpark, pay as you go, x402 pay per call, GET /v1/email/full](https://datacircle.dev/validate-email-apis/crowdspark/pay-as-you-go-x402-pay-per-call-get-v1-email-full/llms.txt)

## CrowdSpark's APIs (4)

- [CrowdSpark: domain WHOIS API pricing, 1 plan, GET /v1/domain/lookup](https://datacircle.dev/domain-whois-apis/crowdspark/pay-as-you-go-x402-pay-per-call-get-v1-domain-lookup/llms.txt)
- [CrowdSpark: domain WHOIS API pricing, 1 plan, POST /v1/domain/lookup/batch](https://datacircle.dev/domain-whois-apis/crowdspark/pay-as-you-go-x402-pay-per-call-post-v1-domain-lookup-batch/llms.txt)
- [CrowdSpark: email verification API pricing, 1 plan, POST /v1/email/check/batch](https://datacircle.dev/validate-email-apis/crowdspark/pay-as-you-go-x402-pay-per-call-post-v1-email-check-batch/llms.txt)
- [CrowdSpark: IP company lookup API pricing, 1 plan, GET /v1/ip/lookup](https://datacircle.dev/ip-company-lookup-apis/crowdspark/pay-as-you-go-x402-pay-per-call-get-v1-ip-lookup/llms.txt)
- [CrowdSpark: IP company lookup API pricing, 1 plan, POST /v1/ip/lookup/batch](https://datacircle.dev/ip-company-lookup-apis/crowdspark/pay-as-you-go-x402-pay-per-call-post-v1-ip-lookup-batch/llms.txt)
- [CrowdSpark: web scraping API pricing, 1 plan, GET /v1/web/safe-read](https://datacircle.dev/web-scraping-apis/crowdspark/pay-as-you-go-x402-pay-per-call-get-v1-web-safe-read/llms.txt)
- [CrowdSpark: web scraping API pricing, 1 plan, GET /v1/web/read](https://datacircle.dev/web-scraping-apis/crowdspark/pay-as-you-go-x402-pay-per-call-get-v1-web-read/llms.txt)
- [CrowdSpark: web scraping API pricing, 1 plan, GET /v1/web/markdown](https://datacircle.dev/web-scraping-apis/crowdspark/pay-as-you-go-x402-pay-per-call-get-v1-web-markdown/llms.txt)

## CrowdSpark: email verification API alternatives

- [BillionVerify, $120 monthly, Business, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/120-monthly-business-post-verify-bulk/llms.txt): $0.60 per 1,000, 67% complete, live
- [MillionPhones, $16,800 yearly](https://datacircle.dev/validate-email-apis/millionphones/16800-yearly/llms.txt): $0.60 per 1,000, 33% complete, live
- [Listclean, $15 pack, 25K Credits, GET /verify/email/{email}](https://datacircle.dev/validate-email-apis/listclean/15-pack-25k-credits-get-verify-email-email/llms.txt): $0.60 per 1,000, 33% complete, live
- [Reoon, $9 monthly, Daily Credits, GET /verify](https://datacircle.dev/validate-email-apis/reoon/9-monthly-daily-credits-get-verify/llms.txt): $0.60 per 1,000, 67% 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://agents.crowdspark.me/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://agents.crowdspark.me/llms-full.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://agents.crowdspark.me/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://agents.crowdspark.me/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://crowdspark.me?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing