# Stormap, free, No key: Email verification API

> Is this email address or domain real and legitimate? For lead research, signup / fraud screening, outreach list cleaning and vendor checks. Returns a verdict (looks_legitimate, risky, invalid) with reasons, plus: email syntax, role address (sales@, info@), free provider or disposable/throwaway service, whether the domain accepts mail (MX, null MX), mail provider (Google Workspace, Microsoft 365...), SPF and DMARC policy, whether the website loads, and domain age from RDAP. Does not contact the mail server, so it cannot confirm a specific mailbox exists.

Stormap's No key plan for the email verification API costs $0.00 per 1,000 emails. We check each provider's docs for 6 fields. Stormap's docs list 3: Address, Deliverability, Company.
You get up to 600 calls a month.
We haven't run Stormap through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
This plan is free. We rank 4,337 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/stormap/free-no-key
- [Email validation API: best verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://stormap.ai/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://stormap.ai/api/v1/tools/email_domain_check`
- API key: not needed
- Its API docs: https://stormap.ai/developers/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing#/paths/~1api~1v1~1tools~1email_domain_check
- Sold by: Stormap (https://stormap.ai?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-09

## In the answer

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

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: vendor_trust_profile · company_changes · agentic_commerce_readiness · company_profile · check_before_paying · package_check · why_is_it_moving · trading_halts · x402_market_report · find_best_api · brainstorm_ideas · read_url · ai_visibility_score · check_ai_crawler_access · generate_llms_txt

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Is this email address or domain real and legitimate? For lead research, signup / fraud screening, outreach list cleaning and vendor checks. Returns a verdict (looks_legitimate, risky, invalid) with reasons, plus: email syntax, role address (sales@, info@), free provider or disposable/throwaway service, whether the domain accepts mail (MX, null MX), mail provider (Google Workspace, Microsoft 365...), SPF and DMARC policy, whether the website loads, and domain age from RDAP. Does not contact the mail server, so it cannot confirm a specific mailbox exists.

## Data

- What it checks: format, mail servers, disposable domains, role addresses
- Keep data: no API terms
- Use data: URL tools only fetch public websites (private and internal addresses are refused), with short timeouts and size limits. 60 requests/minute burst limit. Don't use the tools to scan sites you don't own at volume.

## Plan

- Pay: $0
- Enough for: 600 calls a month

## Rate limit

- Per day: 20
- Per second: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email
- Method: POST
- Path: /api/v1/tools/email_domain_check

## About the plan

- Plan: No key
- Who can get it: anyone, with no key or account, limited per IP address

## The 20 fields the plan's answer can hold

input, type, verdict, reasons, domain, domain type, syntax valid, plus tag, role address, disposable, free provider, accepts mail, null MX, mail provider, SPF policy, DMARC policy, website reachable, website status, domain age, domain registered date

## Stormap's plans (6)

- [Stormap, free, No key](https://datacircle.dev/validate-email-apis/stormap/free-no-key/llms.txt): $0.00 per 1,000, 50% complete
- [Stormap, free key](https://datacircle.dev/validate-email-apis/stormap/free-key/llms.txt): $0.00 per 1,000, 50% complete
- [Stormap, pay as you go](https://datacircle.dev/validate-email-apis/stormap/pay-as-you-go/llms.txt): $10.00 per 1,000, 50% complete
- [Stormap, $10 pack](https://datacircle.dev/validate-email-apis/stormap/10-pack/llms.txt): $10.00 per 1,000, 50% complete
- [Stormap, $9 monthly](https://datacircle.dev/validate-email-apis/stormap/9-monthly/llms.txt): $4.50 per 1,000, 50% complete
- [Stormap, $29 monthly](https://datacircle.dev/validate-email-apis/stormap/29-monthly/llms.txt): $1.933 per 1,000, 50% complete

## Stormap's calls for this API (2)

- `POST /api/v1/tools/email_domain_check`: [Stormap, free, No key](https://datacircle.dev/validate-email-apis/stormap/free-no-key/llms.txt)
- `GET /x402/v1/email_domain_check`: [Stormap, pay as you go](https://datacircle.dev/validate-email-apis/stormap/pay-as-you-go/llms.txt)

## Stormap's APIs (3)

- [Stormap: company enrichment API pricing, 6 plans](https://datacircle.dev/company-enrichment-apis/stormap/free-no-key/llms.txt)
- [Stormap: email verification API pricing, 6 plans](https://datacircle.dev/validate-email-apis/stormap/free-no-key/llms.txt)
- [Stormap: web scraping API pricing, 6 plans](https://datacircle.dev/web-scraping-apis/stormap/free-no-key/llms.txt)

## Stormap: email verification API alternatives

- [Elastic Email, $289 monthly, Email Marketing Pro (30,000 contacts), POST /verifications/{email}](https://datacircle.dev/validate-email-apis/elastic-email/289-monthly-email-marketing-pro-30000-contacts-post-verifications-email/llms.txt): $1.927 per 1,000, 50% complete, stored
- [WarmySender, $29 pack, 15,000 verification credits, POST /verification/batches](https://datacircle.dev/validate-email-apis/warmysender/29-pack-15000-verification-credits-post-verification-batches/llms.txt): $1.933 per 1,000, 33% complete, live
- [TempMailChecker, $29 monthly](https://datacircle.dev/validate-email-apis/tempmailchecker/29-monthly/llms.txt): $1.933 per 1,000, 17% complete, 24 hours
- [Sparkle, $29 monthly, Starter, POST /email-verifier/bulk/quick](https://datacircle.dev/validate-email-apis/sparkle/29-monthly-starter-post-email-verifier-bulk-quick/llms.txt): $1.933 per 1,000, 33% 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.cdp.coinbase.com/platform/v2/x402/discovery/resources?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://stormap.ai?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://stormap.ai/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://stormap.ai/api/v1?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://stormap.ai/developers?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://stormap.ai/developers/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://stormap.ai/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://stormap.ai/pricing.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://stormap.ai/privacy?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://stormap.ai/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://stormap.ai/x402/v1?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing