# Fonnte, free: Phone validation API

> Check if a number is registered on whatsapp.

Fonnte's phone validation API on its Free plan. It costs $0.00 per 1,000 phones. It returns none of the 9 key fields we check: Number, Formats, Validity, Type and 5 more.
We haven't run Fonnte through [our phone validation API benchmark](https://datacircle.dev/best-phone-validation-api.txt) yet.
This plan is free. We rank 888 plans for phone validation APIs by price. Half the plans cost $3.376 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/fonnte/free
- [Phone validation API: 40+ providers compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://fonnte.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Request: `POST https://api.fonnte.com/validate`
- API key: with the plan, on https://fonnte.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Its API docs: https://docs.fonnte.com/api-validate-number/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: Fonnte (https://fonnte.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 0%

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: Sending API Messages

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Check if a number is registered on whatsapp.

## Data

- Freshness: live
- What it checks: messaging apps
- Keep data: no limit
- Use data: any

## Plan

- Pay: $0
- You get: 1,000 requests a month

## Rate limit

- Batch: 500

## Speed

- Answer: in the call

## The call

- You send: target. Optional: countryCode
- Method: POST
- Path: /validate

## About the plan

- Plan: Free
- Who can get it: anyone with a WhatsApp number, regular or Business, to connect to a device

## The 3 fields the plan's answer can hold

registered numbers, not registered numbers, request status

## Fonnte's plans (8)

- [Fonnte, free](https://datacircle.dev/validate-phone-apis/fonnte/free/llms.txt): $0.00 per 1,000, 0% complete, live
- [Fonnte, $2.50 monthly](https://datacircle.dev/validate-phone-apis/fonnte/2-50-monthly/llms.txt): 0% complete, live
- [Fonnte, $6 monthly](https://datacircle.dev/validate-phone-apis/fonnte/6-monthly/llms.txt): 0% complete, live
- [Fonnte, $10 monthly](https://datacircle.dev/validate-phone-apis/fonnte/10-monthly/llms.txt): 0% complete, live
- [Fonnte, $13 monthly](https://datacircle.dev/validate-phone-apis/fonnte/13-monthly/llms.txt): 0% complete, live
- [Fonnte, $14 monthly](https://datacircle.dev/validate-phone-apis/fonnte/14-monthly/llms.txt): 0% complete, live
- [Fonnte, $22 monthly](https://datacircle.dev/validate-phone-apis/fonnte/22-monthly/llms.txt): 0% complete, live
- [Fonnte, $29 monthly](https://datacircle.dev/validate-phone-apis/fonnte/29-monthly/llms.txt): 0% complete, live

## Fonnte's calls (1)

- `POST /validate`: [Fonnte, free](https://datacircle.dev/validate-phone-apis/fonnte/free/llms.txt)

## Fonnte's APIs (1)

- [Fonnte: phone validation API pricing, 8 plans](https://datacircle.dev/validate-phone-apis/fonnte/free/llms.txt)

## Fonnte: phone validation API alternatives

- [Foxentry, free trial, POST /phone/validate, Validate phone number (extended)](https://datacircle.dev/validate-phone-apis/foxentry/free-trial-post-phone-validate-validate-phone-number-extended/llms.txt): $0.00 per 1,000, 56% complete, live
- [HLR Lookups, free, 100 free lookups, POST /hlr-lookups](https://datacircle.dev/validate-phone-apis/hlr-lookups/free-100-free-lookups-post-hlr-lookups/llms.txt): $0.00 per 1,000, 56% complete, live
- [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
- [HLR Lookup, free, 200 free credits, POST /batches/{id}/sourcejson, Bulk uploads via API](https://datacircle.dev/validate-phone-apis/hlr-lookup/free-200-free-credits-post-batches-id-sourcejson/llms.txt): $0.00 per 1,000, 89% 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 2026-11-02.

- https://docs.fonnte.com/about-package?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.fonnte.com/api-send-message?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.fonnte.com/api-validate-number/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://fonnte.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://fonnte.com/tutorial/terms-conditions?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing