# Delx.ai, pay as you go: Email verification API

> Email validation API for agents at $0.01 USDC. Call when you need syntax and domain delivery signals before outreach, signup, or routing.

Delx.ai's x402 plan for the email verification API costs $10.00 per 1,000 emails. We check each provider's docs for 6 fields. Delx.ai's docs list 3: Address, Deliverability, Company.
We haven't run Delx.ai through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
We rank 4,721 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 10% of the 4,721 plans. Delx.ai has no free email verification API plan. [734 email verification API plans on our price sheet are free.](https://datacircle.dev/best-email-verification-api.txt) [pingutil's free plan](https://datacircle.dev/validate-email-apis/pingutil/free-api-key-post-v1-verify/llms.txt) scores highest of the free plans in our benchmark, at 82.3 out of 100.
[PayPerQ's pay-as-you-go plan](https://datacircle.dev/validate-email-apis/payperq/pay-as-you-go-pay-per-request-with-l402-post-api-minerva-validate-emails/llms.txt) costs the least for 10,000 emails a month: $0.06.
[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.
[Validemail.co](https://datacircle.dev/validate-email-apis/validemail-co/9-90-monthly-9-90-month-get-api-v1-validate/llms.txt), [pingutil](https://datacircle.dev/validate-email-apis/pingutil/free-api-key-post-v1-verify/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/delx-ai/pay-as-you-go
- [Email validation API: best verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://commerce.delx.ai?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.delx.ai/api/v1/x402/email-validate`
- API key: not needed
- Its API docs: https://commerce.delx.ai/products/util-email-validate?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: Delx.ai (https://delx.ai?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-10

## In the answer

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

## Price

- $ per 1,000 emails: $10.00
- Per: call
- Billing: pay as you go

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## In their words

- Their pitch: Email validation API for agents at $0.01 USDC. Call when you need syntax and domain delivery signals before outreach, signup, or routing.

## Data

- What it checks: format, mail servers
- 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: timeout
- Method: POST
- Path: /api/v1/x402/email-validate

## About the plan

- Plan: x402
- Who can get it: anyone

## The 6 fields the plan's answer can hold

normalized email, syntax valid, domain, MX records, A records, likely deliverable

## Delx.ai's plans (1)

- [Delx.ai, pay as you go](https://datacircle.dev/validate-email-apis/delx-ai/pay-as-you-go/llms.txt): $10.00 per 1,000, 50% complete

## Delx.ai's calls for this API (1)

- `POST /api/v1/x402/email-validate`: [Delx.ai, pay as you go](https://datacircle.dev/validate-email-apis/delx-ai/pay-as-you-go/llms.txt)

## Delx.ai's APIs (5)

- [Delx.ai Company enrichment API pricing, 1 plan](https://datacircle.dev/company-enrichment-apis/delx-ai/pay-as-you-go/llms.txt)
- [Delx.ai Domain WHOIS API pricing, 1 plan](https://datacircle.dev/domain-whois-apis/delx-ai/pay-as-you-go/llms.txt)
- [Delx.ai Email verification API pricing, 1 plan](https://datacircle.dev/validate-email-apis/delx-ai/pay-as-you-go/llms.txt)
- [Delx.ai News API pricing, 1 plan](https://datacircle.dev/news-apis/delx-ai/pay-as-you-go/llms.txt)
- [Delx.ai Web scraping API pricing, 1 plan](https://datacircle.dev/web-scraping-apis/delx-ai/pay-as-you-go/llms.txt)

## Delx.ai: email verification API alternatives

[Delx.ai alternatives: other email verification API providers by price](https://datacircle.dev/delx-ai-alternatives.txt)

We list other providers' plans closest to this plan in price per 1,000 emails.

- [Tuski, pay as you go](https://datacircle.dev/validate-email-apis/tuski/pay-as-you-go/llms.txt): $10.00 per 1,000, 50% complete
- [Clearout, $1,000 pack, 500,000 credits, POST /email_verify/instant, Instant Verify, full](https://datacircle.dev/validate-email-apis/clearout/1000-pack-500000-credits-post-email-verify-instant-instant-verify-full/llms.txt): $10.00 per 1,000, 50% complete, live
- [InboxPolicy, pay as you go, Pay-per-call (x402), POST /v1/decide](https://datacircle.dev/validate-email-apis/inboxpolicy/pay-as-you-go-pay-per-call-x402-post-v1-decide/llms.txt): $10.00 per 1,000, 50% complete, 72 hours
- [SyncGTM, $50 pack](https://datacircle.dev/validate-email-apis/syncgtm/50-pack/llms.txt): $10.00 per 1,000, 33% 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 2026-11-10.

- https://api.delx.ai/openapi.x402.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://api.delx.ai/x402-portfolio.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://commerce.delx.ai?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://commerce.delx.ai/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://commerce.delx.ai/products/util-email-validate?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://delx.ai/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://delx.ai/trust?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing