# Datakoot, free: Email verification API

> Assess whether a domain (or the domain of an email address) can receive mail and how strong its sender authentication is. Returns MX presence, SPF and DMARC policy, whether it's a free consumer provider (gmail, etc.) or a known disposable/temp-mail provider, and an overall verdict.

Datakoot's Free plan for the email verification API costs $0.00 per 1,000 emails. We check each provider's docs for 6 fields. Datakoot's docs list 2: Deliverability, Company.
We ran Datakoot in [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt). We didn't score any Datakoot plan.
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/datakoot/free
- [Email validation API: best verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://datakoot.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://domain.datakoot.com/mcp`
- API key: not needed
- Its API docs: https://x402.datakoot.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing#/paths/~1api~1email_deliverability
- Sold by: Datakoot (https://datakoot.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-09

## In the answer

- Completeness: 33%
- Deliverability: ✓
- Company: ✓

## Price

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

## Aggregators

- Aggregators: none

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Assess whether a domain (or the domain of an email address) can receive mail and how strong its sender authentication is. Returns MX presence, SPF and DMARC policy, whether it's a free consumer provider (gmail, etc.) or a known disposable/temp-mail provider, and an overall verdict.

## Data

- What it checks: mail servers, disposable domains
- Keep data: no limit
- Use data: You agree not to: use the Services for anything unlawful, attempt to break, overload, or circumvent rate limits or access controls, resell raw bulk data as a competing dataset, or use the Services in a way that violates the terms of the upstream data sources. [...] Where a source requires attribution (for example World Bank and OSV under CC-BY, or ECB data), that attribution is carried in the responses and must be preserved. Domain and company registration data (WHOIS/RDAP) is provided for lookup and verification use, you may not redistribute it as a standalone commercial dataset.

## Plan

- Pay: $0
- You get: 100 requests a day
- Enough for: 100 calls a day

## Rate limit

- Per day: 100
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: jsonrpc "2.0", id, method "tools/call", params.name "email_deliverability", params.arguments.domain_or_email
- Method: POST
- Path: /mcp

## About the plan

- Plan: Free
- Who can get it: anyone, with no key and no signup (100 calls a day per caller)

## The 12 fields the plan's answer can hold

domain, can receive mail, MX hosts, SPF record, SPF checked, DMARC policy, DMARC record, DMARC checked, free provider, disposable, auth posture, verdict

## Datakoot's plans (3)

- [Datakoot, free](https://datacircle.dev/validate-email-apis/datakoot/free/llms.txt): $0.00 per 1,000, 33% complete
- [Datakoot, pay as you go](https://datacircle.dev/validate-email-apis/datakoot/pay-as-you-go/llms.txt): $10.00 per 1,000, 33% complete
- [Datakoot, $10 monthly](https://datacircle.dev/validate-email-apis/datakoot/10-monthly/llms.txt): $0.20 per 1,000, 33% complete

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

- `POST /mcp`: [Datakoot, free](https://datacircle.dev/validate-email-apis/datakoot/free/llms.txt)
- `POST /api/email_deliverability`: [Datakoot, pay as you go](https://datacircle.dev/validate-email-apis/datakoot/pay-as-you-go/llms.txt)

## Datakoot's APIs (4)

- [Datakoot: business verification API pricing, 3 plans](https://datacircle.dev/business-verification-apis/datakoot/free/llms.txt)
- [Datakoot: email verification API pricing, 3 plans](https://datacircle.dev/validate-email-apis/datakoot/free/llms.txt)
- [Datakoot: domain WHOIS API pricing, 3 plans, POST /mcp, Domain Intel (MCP)](https://datacircle.dev/domain-whois-apis/datakoot/free-post-mcp-domain-intel-mcp/llms.txt)
- [Datakoot: domain WHOIS API pricing, 3 plans, POST /mcp, Domain Report (MCP)](https://datacircle.dev/domain-whois-apis/datakoot/free-post-mcp-domain-report-mcp/llms.txt)
- [Datakoot: tech stack API pricing, 3 plans, POST /mcp, Domain Report (MCP)](https://datacircle.dev/company-technology-apis/datakoot/free-post-mcp-domain-report-mcp/llms.txt)
- [Datakoot: tech stack API pricing, 3 plans, POST /mcp, Tech Stack (MCP)](https://datacircle.dev/company-technology-apis/datakoot/free-post-mcp-tech-stack-mcp/llms.txt)

## Datakoot: email verification API alternatives

- [MillionVerifier, $4,999 pack, 25,000,000 verification credits, GET /api/v3](https://datacircle.dev/validate-email-apis/millionverifier/4999-pack-25000000-verification-credits-get-api-v3/llms.txt): $0.20 per 1,000, 50% complete, live
- [Signaliz, top-up](https://datacircle.dev/validate-email-apis/signaliz/top-up/llms.txt): $0.20 per 1,000, 33% complete, stored
- [SMTPing, $100 pack, 500k credits, POST /verify/bulk](https://datacircle.dev/validate-email-apis/smtping/100-pack-500k-credits-post-verify-bulk/llms.txt): $0.20 per 1,000, 50% complete, live
- [Encrata, $10 pack, 50K credits, POST /api/jobs/bulk](https://datacircle.dev/validate-email-apis/encrata/10-pack-50k-credits-post-api-jobs-bulk/llms.txt): $0.20 per 1,000, 67% 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 2026-11-09.

- https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://datakoot.com/guides/mcp-server-for-domain-and-dns-recon?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://datakoot.com/guides/pay-per-call-mcp-with-x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://datakoot.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://datakoot.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://datakoot.com/privacy?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://datakoot.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://x402.datakoot.com/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://x402.datakoot.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing