# DeepAPI, free: Email verification API

> Check one email address and return a standardized deliverability verdict, score, and compact evidence flags.

DeepAPI's $1 starting credit plan for the email verification API costs $0.00 per 1,000 emails. We check each provider's docs for 6 fields. DeepAPI's docs list 2: Deliverability, Confidence.
We haven't run DeepAPI through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
This plan is free. We rank 4,391 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/deepapi/free
- [Email validation API: best verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://deepapi.co/docs/pricing.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://deepapi.co/v1/email/verify`
- API key: with the plan, on https://deepapi.co/docs/pricing.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://deepapi.co/docs/reference.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: DeepAPI (https://deepapi.co?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-10

## In the answer

- Completeness: 33%
- Deliverability: ✓
- Confidence: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: 74 other DeepAPI calls

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Check one email address and return a standardized deliverability verdict, score, and compact evidence flags.

## Data

- What it checks: format, mail servers, disposable domains, mailbox
- Keep data: no limit
- Use data: Lawful use only. Use DeepAPI only for lawful purposes. You must comply with all laws that apply to you — including privacy, data protection, anti-spam, intellectual property, and computer misuse laws — and with any third-party terms that bind you. [...] Web data rules. DeepAPI reads only publicly available web pages, without logging in. You must not use the service, or combine it with anything else, to: access data behind a login, paywall, or other access control, or submit credentials, session cookies, or authentication tokens for any third-party site, create or use fake accounts or misrepresent your identity to any platform, bypass or attempt to bypass technical protection measures such as CAPTCHAs, login walls, IP blocks, or anti-bot systems, collect data about people to stalk, harass, dox, discriminate against, or surveil them, resell raw personal data obtained through DeepAPI as a data product, or use it in ways privacy law forbids.

## Plan

- Pay: $0
- You get: $1
- Enough for: about 27 calls

## Rate limit

- Per second: 166.67
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: Idempotency-Key header, Content-Type header "application/json". Optional: email
- Method: POST
- Path: /v1/email/verify

## About the plan

- Plan: $1 starting credit
- Who can get it: anyone who signs up and verifies their account

## The 13 fields the plan's answer can hold

verdict, score, syntax valid, gibberish, disposable, webmail, MX record, SMTP server, SMTP check, catch-all, blocked, source count, checked at

## DeepAPI's plans (2)

- [DeepAPI, free](https://datacircle.dev/validate-email-apis/deepapi/free/llms.txt): $0.00 per 1,000, 33% complete
- [DeepAPI, top-up](https://datacircle.dev/validate-email-apis/deepapi/top-up/llms.txt): $36.75 per 1,000, 33% complete

## DeepAPI's calls for this API (1)

- `POST /v1/email/verify`: [DeepAPI, free](https://datacircle.dev/validate-email-apis/deepapi/free/llms.txt)

## DeepAPI's APIs (16)

- [DeepAPI: Amazon product API pricing, 2 plans](https://datacircle.dev/amazon-product-apis/deepapi/free/llms.txt)
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- [DeepAPI: company enrichment API pricing, 2 plans](https://datacircle.dev/company-enrichment-apis/deepapi/free/llms.txt)
- [DeepAPI: email verification API pricing, 2 plans](https://datacircle.dev/validate-email-apis/deepapi/free/llms.txt)
- [DeepAPI: email finder API pricing, 2 plans](https://datacircle.dev/find-email-apis/deepapi/free/llms.txt)
- [DeepAPI: people enrichment API pricing, 2 plans](https://datacircle.dev/person-enrichment-apis/deepapi/free/llms.txt)
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- [DeepAPI: web search API pricing, 2 plans](https://datacircle.dev/web-search-apis/deepapi/free/llms.txt)
- [DeepAPI: local business search API pricing, 2 plans](https://datacircle.dev/local-business-search-apis/deepapi/free/llms.txt)
- [DeepAPI: LinkedIn company data API pricing, 2 plans](https://datacircle.dev/linkedin-company-profile-apis/deepapi/free/llms.txt)
- [DeepAPI: LinkedIn profile post API pricing, 2 plans](https://datacircle.dev/linkedin-person-post-apis/deepapi/free/llms.txt)
- [DeepAPI: LinkedIn profile API pricing, 2 plans](https://datacircle.dev/linkedin-profile-apis/deepapi/free/llms.txt)
- [DeepAPI: LinkedIn people search API pricing, 2 plans](https://datacircle.dev/linkedin-people-search-apis/deepapi/free/llms.txt)
- [DeepAPI: LinkedIn job search API pricing, 2 plans](https://datacircle.dev/linkedin-job-search-apis/deepapi/free/llms.txt)
- [DeepAPI: video search API pricing, 2 plans](https://datacircle.dev/video-search-apis/deepapi/free/llms.txt)
- [DeepAPI: YouTube channel video API pricing, 2 plans](https://datacircle.dev/youtube-channel-video-apis/deepapi/free/llms.txt)

## DeepAPI: email verification API alternatives

- [Tomba, $14,580 yearly, Scale 200k, GET /email-verifier, Email Verifier, full](https://datacircle.dev/validate-email-apis/tomba/14580-yearly-scale-200k-get-email-verifier-email-verifier-full/llms.txt): $36.45 per 1,000, 50% complete, live
- [Dropcontact, €588 yearly](https://datacircle.dev/validate-email-apis/dropcontact/588-yearly/llms.txt): $36.76 per 1,000, 33% complete, live
- [Postcoder, £46 monthly](https://datacircle.dev/validate-email-apis/postcoder/46-monthly/llms.txt): $36.805 per 1,000, 33% complete, live
- [Loqate, $300 pack, Pay-as-you-go $300, GET /EmailValidation/Batch/Validate/v1.20/json6.ws](https://datacircle.dev/validate-email-apis/loqate/300-pack-pay-as-you-go-300-get-emailvalidation-batch-validate-v1-20-json6-ws/llms.txt): $37.00 per 1,000, 50% 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://deepapi.co?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://deepapi.co/docs/pricing.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://deepapi.co/docs/reference.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://deepapi.co/index.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://deepapi.co/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://deepapi.co/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://deepapi.co/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing