# Fideo, free: Email verification API

> Validates the email’s syntax and deliverability to gauge its legitimacy.

Fideo's email verification API on its Free trial plan. It costs $0.00 per 1,000 emails. It returns 2 of the 6 key fields we check: Address, Deliverability.
Fideo limits how many calls you get but gives no number.
We haven't run Fideo through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
This plan is free. We rank 3,341 plans for email verification APIs by price. Half the plans cost $1.985 per 1,000 emails or less.
[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.
[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.
[MailTester Ninja](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt), [Enrich.so](https://datacircle.dev/validate-email-apis/enrich-so/499-monthly/llms.txt) and [GetProspect](https://datacircle.dev/validate-email-apis/getprospect/369-pack/llms.txt) are the best email verification API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/fideo/free
- [Email validation API: 160+ providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://www.fideo.ai/faq?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.fideo.ai/verify`
- API key: with the plan, on https://www.fideo.ai/faq?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://docs.fideo.ai/docs/email-checks?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: Fideo (https://www.fideo.ai?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-04

## In the answer

- Completeness: 33%
- Address: ✓
- Deliverability: ✓

## Price

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

## Aggregators

- Aggregators: none

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Validates the email’s syntax and deliverability to gauge its legitimacy.

## Data

- What it checks: format, mail servers, disposable domains, role addresses
- Keep data: the Subscription Term, then delete it
- Use data: solely for the Permitted Uses, Customer will not use, and will not allow or require any Third Party End Users to use, Fideo Data or Fideo Data Services: (i) to determine any person’s employability, credit worthiness, credit standing, credit capacity, or other characteristics related to such person’s manner or mode of living, as listed in Section 603(d) of the Fair Credit Reporting Act, (ii) to make a decision by automated processing to evaluate, analyze, or predict an individual’s preferences where the decision results in the provision or denial of financial or lending services, housing, insurance, education enrollment or opportunity, criminal justice, employment opportunities, health care services, or access to essential goods or services, (iii) in any manner that violates Applicable Law, (iv) to build or support products or services that are competive with Fideo Data Services, or (v) in any manner that exceeds the scope of the licenses granted or the limits or restrictions set forth in the Agreement

## Plan

- Pay: $0

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: Content-Type header "application/json", emails. Optional: phones, name.given, name.middle, name.family, location.addressLine1, location.addressLine2, location.city, location.region, location.regionCode, location.postalCode, location.country, location.countryCode, ipAddress, birthday, ssns, sessionId, globalWatchSimilarity
- Method: POST
- Path: /verify

## About the plan

- Plan: Free trial
- Who can get it: anyone who signs up for the trial

## The 19 fields the plan's answer can hold

risk score, session ID, free account, user portion pattern, email type, disposable, role address, deliverability, MX record, invalid email, never seen, first seen, last seen, check ID, check state, check name, check description, check risk, check package

## Fideo's plans (2)

- [Fideo, free](https://datacircle.dev/validate-email-apis/fideo/free/llms.txt): $0.00 per 1,000, 33% complete
- [Fideo, contact us](https://datacircle.dev/validate-email-apis/fideo/contact-us/llms.txt): 33% complete

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

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

## Fideo's APIs (6)

- [Fideo: email verification API pricing, 2 plans](https://datacircle.dev/validate-email-apis/fideo/free/llms.txt)
- [Fideo: phone validation API pricing, 2 plans](https://datacircle.dev/validate-phone-apis/fideo/free/llms.txt)
- [Fideo: email finder API pricing, 1 plan](https://datacircle.dev/find-email-apis/fideo/contact-us/llms.txt)
- [Fideo: phone finder API pricing, 1 plan](https://datacircle.dev/find-phone-apis/fideo/contact-us/llms.txt)
- [Fideo: people enrichment API pricing, 1 plan](https://datacircle.dev/person-enrichment-apis/fideo/contact-us/llms.txt)
- [Fideo: reverse email lookup API pricing, 1 plan](https://datacircle.dev/reverse-email-lookup-apis/fideo/contact-us/llms.txt)

## Fideo: 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
- [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
- [GetProspect, free, POST /v2/email-verifications](https://datacircle.dev/validate-email-apis/getprospect/free-free-post-v2-email-verifications/llms.txt): $0.00 per 1,000, 50% complete, live
- [Sealch, free, POST /api/verify](https://datacircle.dev/validate-email-apis/sealch/free-free-post-api-verify/llms.txt): $0.00 per 1,000, 17% complete, live
- [emailverifier.dev, free](https://datacircle.dev/validate-email-apis/emailverifier-dev/free/llms.txt): $0.00 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 2026-11-04.

- https://docs.fideo.ai/docs/authorization?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.fideo.ai/docs/checks-1?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.fideo.ai/docs/create-api-key?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.fideo.ai/docs/email-checks?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.fideo.ai/docs/multi-field-inputs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.fideo.ai/docs/network-intelligence-checks?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.fideo.ai/docs/session?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.fideo.ai/docs/signals?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.fideo.ai/docs/verify?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.fideo.ai/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.fideo.ai/faq?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.fideo.ai/legal/services-agreement?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing