# IPAddress.to, free: Email verification API

> Trust score (0–100, higher is better) for an email address or a domain.

IPAddress.to's Free plan for the email verification API costs $0.00 per 1,000 emails. IPAddress.to's docs list 4 of the 6 fields on our checklist: Address, Deliverability, Confidence, Company.
You get as many calls as you like.
We haven't run IPAddress.to through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
Half of the 4,039 plans we rank by price cost $1.999 per 1,000 emails or less. This plan and 59 others tie for the lowest price per 1,000 emails of the 4,039 plans. [See the best free email verification API plan.](https://datacircle.dev/best-email-verification-api.txt)
[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), [MailTester Ninja](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt) and [Giggal](https://datacircle.dev/validate-email-apis/giggal/39-pack-50000-credits-post-v1-verify/llms.txt) are the best email verification API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/ipaddress-to/free
- [Email validation API: 200+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://ipaddress.to/api/docs/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `GET https://ipaddress.to/api/email/{email_or_domain}`
- API key: not needed
- Its API docs: https://ipaddress.to/api/docs/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing#email
- Sold by: IPAddress.to (https://ipaddress.to?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-07

## In the answer

- Completeness: 67%
- Address: ✓
- Deliverability: ✓
- Confidence: ✓
- Company: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Trust score (0–100, higher is better) for an email address or a domain.

## Data

- Freshness: live
- What it checks: mail servers, disposable domains, role addresses, mailbox
- Keep data: no limit
- Use data: You agree not to: Use the Service for any unlawful purpose or in violation of any applicable laws, Attempt to disrupt, overload, or impair the Service's infrastructure, Use automated tools to excessively scrape or crawl the Service beyond reasonable API usage, Circumvent any rate limits or access restrictions, Use the Service to harass, stalk, or harm other individuals, Misrepresent your identity or affiliation when using the Service. [...] The API is provided free of charge for reasonable use. We reserve the right to impose rate limits, restrict access, or require authentication at any time. [...] Information is provided "as is" for informational purposes only. [...] You may not copy, reproduce, or redistribute any part of the Service without prior written consent.

## Plan

- Pay: $0
- Enough for: no limit

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email_or_domain
- Method: GET
- Path: /email/{email_or_domain}

## About the plan

- Plan: Free
- Who can get it: anyone

## The 40 fields the plan's answer can hold

email address, domain, normalized email, apex domain, target type, trust score, rating, deliverability score, authentication score, reputation score, domain exists, has MX, null MX, MX hosts, MX resolves, SPF, SPF policy, SPF record, DMARC, DMARC policy, DMARC percentage, DMARC record, DMARC inherited, DKIM, DKIM selector, domain resolves, disposable, disposable via MX, role address, free provider, spam listed, abused TLD, random local part, subaddress, parked domain, mailbox, SMTP code, SMTP message, SMTP MX, factors

## IPAddress.to's plans (1)

- [IPAddress.to, free](https://datacircle.dev/validate-email-apis/ipaddress-to/free/llms.txt): $0.00 per 1,000, 67% complete, live

## IPAddress.to's calls for this API (1)

- `GET /email/{email_or_domain}`: [IPAddress.to, free](https://datacircle.dev/validate-email-apis/ipaddress-to/free/llms.txt)

## IPAddress.to's APIs (3)

- [IPAddress.to: domain WHOIS API pricing, 1 plan](https://datacircle.dev/domain-whois-apis/ipaddress-to/free/llms.txt)
- [IPAddress.to: email verification API pricing, 1 plan](https://datacircle.dev/validate-email-apis/ipaddress-to/free/llms.txt)
- [IPAddress.to: IP company lookup API pricing, 1 plan, GET /score/{ip_or_hostname}](https://datacircle.dev/ip-company-lookup-apis/ipaddress-to/free-get-score-ip-or-hostname/llms.txt)
- [IPAddress.to: IP company lookup API pricing, 1 plan, GET /lookup/{ip_or_hostname}](https://datacircle.dev/ip-company-lookup-apis/ipaddress-to/free-get-lookup-ip-or-hostname/llms.txt)

## IPAddress.to: email verification API alternatives

- [MailTester Ninja, free, No token](https://datacircle.dev/validate-email-apis/mailtester-ninja/free-no-token/llms.txt): $0.00 per 1,000, 50% complete, live
- [Giggal, free trial, POST /v1/verify-batch](https://datacircle.dev/validate-email-apis/giggal/free-trial-post-v1-verify-batch/llms.txt): $0.00 per 1,000, 67% complete, live
- [Enrich.so, free, POST /email-validation](https://datacircle.dev/validate-email-apis/enrich-so/free/llms.txt): $0.00 per 1,000, 50% complete, live
- [KaijuVerifier, free, POST /api/v1/jobs, Submit an async bulk job with the SMTP probe](https://datacircle.dev/validate-email-apis/kaijuverifier/free-free-post-api-v1-jobs/llms.txt): $0.00 per 1,000, 50% complete, live
- [FindEmails.com, free](https://datacircle.dev/validate-email-apis/findemails-com/free/llms.txt): $0.00 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 2026-11-07.

- https://ipaddress.to?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://ipaddress.to/api/docs/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://ipaddress.to/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing