# Agent Data Workers, pay as you go: Email verification API

> Validates the syntax, checks that the domain has mail servers (MX), and flags disposable domains (100k+ list), role accounts (info@, admin@) and free providers. No SMTP probing.

Agent Data Workers's x402 pay per call plan for the email verification API costs $5.00 per 1,000 emails. We check each provider's docs for 6 fields. Agent Data Workers's docs list 2: Address, Deliverability.
We haven't run Agent Data Workers 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 22% 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/agent-data-workers/pay-as-you-go
- [Email validation API: best verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://api.agent-data.workers.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `GET https://api.agent-data.workers.dev/api/v1/email/check`
- API key: not needed
- Its API docs: https://api.agent-data.workers.dev/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing#/paths/~1api~1v1~1email~1check
- Sold by: Agent Data Workers (https://api.agent-data.workers.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-09

## In the answer

- Completeness: 33%
- Address: ✓
- Deliverability: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Validates the syntax, checks that the domain has mail servers (MX), and flags disposable domains (100k+ list), role accounts (info@, admin@) and free providers. No SMTP probing.

## Data

- Freshness: 1 hour
- What it checks: format, mail servers, disposable domains, role addresses
- 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
- Method: GET
- Path: /api/v1/email/check

## About the plan

- Plan: x402 pay per call
- Who can get it: anyone with a wallet paying USDC on Base or Solana, or USDT on Solana (x402 v2), with no account or API key

## The 7 fields the plan's answer can hold

email address, valid syntax, MX records, disposable domain, role account, free provider, deliverable guess

## Agent Data Workers's plans (1)

- [Agent Data Workers, pay as you go](https://datacircle.dev/validate-email-apis/agent-data-workers/pay-as-you-go/llms.txt): $5.00 per 1,000, 33% complete, 1 hour

## Agent Data Workers's calls for this API (1)

- `GET /api/v1/email/check`: [Agent Data Workers, pay as you go](https://datacircle.dev/validate-email-apis/agent-data-workers/pay-as-you-go/llms.txt)

## Agent Data Workers's APIs (6)

- [Agent Data Workers: company enrichment API pricing, 1 plan](https://datacircle.dev/company-enrichment-apis/agent-data-workers/pay-as-you-go/llms.txt)
- [Agent Data Workers: domain WHOIS API pricing, 1 plan](https://datacircle.dev/domain-whois-apis/agent-data-workers/pay-as-you-go/llms.txt)
- [Agent Data Workers: email verification API pricing, 1 plan](https://datacircle.dev/validate-email-apis/agent-data-workers/pay-as-you-go/llms.txt)
- [Agent Data Workers: news API pricing, 1 plan](https://datacircle.dev/news-apis/agent-data-workers/pay-as-you-go/llms.txt)
- [Agent Data Workers: web scraping API pricing, 1 plan](https://datacircle.dev/web-scraping-apis/agent-data-workers/pay-as-you-go/llms.txt)
- [Agent Data Workers: web search API pricing, 1 plan](https://datacircle.dev/web-search-apis/agent-data-workers/pay-as-you-go/llms.txt)

## Agent Data Workers: 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

## 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.agent-data.workers.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://api.agent-data.workers.dev/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://api.agent-data.workers.dev/api/v1/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://api.agent-data.workers.dev/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://api.agent-data.workers.dev/openapi.json?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