# Fideo, free: Phone validation API

> Checks the phone syntax, carrier, porting history, and more.

Fideo's phone validation API on its Free trial plan. It costs $0.00 per 1,000 phones. It returns 3 of the 9 key fields we check: Number, Type, Risk.
Fideo limits how many calls you get but gives no number.
We haven't run Fideo through [our phone validation API benchmark](https://datacircle.dev/best-phone-validation-api.txt) yet.
This plan is free. We rank 768 plans for phone validation APIs by price. Half the plans cost $3.60 per 1,000 phones or less.
[Botoi's $199 monthly plan](https://datacircle.dev/validate-phone-apis/botoi/199-monthly/llms.txt) is the cheapest paid plan per 1,000 phones: as little as $0.0066. Botoi's $199 monthly plan covers up to 1,000,000 phones a day.
[Data247](https://datacircle.dev/validate-phone-apis/data247/12-pack-membership-get-v3-0-verify247-phone/llms.txt), [Foxentry](https://datacircle.dev/validate-phone-apis/foxentry/top-up-pay-as-you-go-post-phone-validate-validate-phone-number-extended/llms.txt) and [HLR Lookups](https://datacircle.dev/validate-phone-apis/hlr-lookups/top-up-1-1m-post-hlr-lookup/llms.txt) are the best phone validation API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-phone-apis/fideo/free
- [Phone validation API: 40+ providers compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://www.fideo.ai/faq?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-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=phone-validation-api-pricing
- Its API docs: https://docs.fideo.ai/docs/phone-checks?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: Fideo (https://www.fideo.ai?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-04

## In the answer

- Completeness: 33%
- Number: ✓
- Type: ✓
- Risk: ✓

## Price

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

## Aggregators

- Aggregators: none

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Checks the phone syntax, carrier, porting history, and more.

## Data

- Countries: Worldwide
- What it checks: numbering plan, carrier
- 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", phones. Optional: emails, 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 17 fields the plan's answer can hold

risk score, session ID, invalid phone format, phone type, previous phone type, phone location mismatch, do not text, do not call, porting status, phone first seen, phone last seen, check ID, check state, check name, check description, check risk, check package

## Fideo's plans (2)

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

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

- `POST /verify`: [Fideo, free](https://datacircle.dev/validate-phone-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: phone validation API alternatives

- [Foxentry, free trial, POST /phone/validate, Validate phone number (basic)](https://datacircle.dev/validate-phone-apis/foxentry/free-trial-post-phone-validate-validate-phone-number-basic/llms.txt): $0.00 per 1,000, 56% complete, stored
- [HLR Lookups, free, 100 free lookups, POST /nt-lookups](https://datacircle.dev/validate-phone-apis/hlr-lookups/free-100-free-lookups-post-nt-lookups/llms.txt): $0.00 per 1,000, 67% complete, stored
- [Abstract API, free](https://datacircle.dev/validate-phone-apis/abstract-api/free/llms.txt): $0.00 per 1,000, 89% complete, 1 day
- [seven.io, free test credit, GET /api/lookup/hlr](https://datacircle.dev/validate-phone-apis/seven-io/free-test-credit-get-api-lookup-hlr/llms.txt): $0.00 per 1,000, 78% complete, live
- [Fetchify, free](https://datacircle.dev/validate-phone-apis/fetchify/free/llms.txt): $0.00 per 1,000, 56% 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 2026-11-04.

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