# Z-API, free trial, 2 days, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}: Phone validation API

> Use this API whenever you want to check if a number has an application account, usually for form validation.

Z-API's phone validation API on its "Free trial, 2 days" plan. It costs $0.00 per 1,000 phones. It returns 2 of the 9 key fields we check: Formats, Validity.
Z-API limits how many calls you get but gives no number.
We haven't run Z-API through [our phone validation API benchmark](https://datacircle.dev/best-phone-validation-api.txt) yet.
This plan is free. We rank 935 plans for phone validation APIs by price. Half the plans cost $3.96 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/z-api/free-trial-2-days-get-instances-instanceid-token-token-phone-exists-phone
- [Phone validation API: the best of 40+ providers compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://www.z-api.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Request: `GET https://api.z-api.io/instances/{instanceId}/token/{token}/phone-exists/{phone}`
- API key: with the plan, on https://www.z-api.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Its API docs: https://developer.z-api.io/en/contacts/get-iswhatsapp?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: Z-API (https://z-api.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 22%
- Formats: ✓
- Validity: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: 217 other calls

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Use this API whenever you want to check if a number has an application account, usually for form validation.

## Data

- What it checks: messaging apps
- Keep data: no API terms
- Use data: Our REST API and Webhooks infrastructure is intended exclusively for technical interoperability between business systems (ERPs, CRMs and requested transactional notifications). Using it for bulk messaging, unsolicited communications (SPAM) or violating third-party terms of use is strictly prohibited and results in immediate account termination.

## Plan

- Pay: $0

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: instanceId, phone
- Method: GET
- Path: /instances/{instanceId}/token/{token}/phone-exists/{phone}

## About the plan

- Plan: Free trial, 2 days
- Who can get it: anyone, no credit card

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

status, formatted number, WhatsApp LID

## Z-API's plans (19)

- [Z-API, free trial, 2 days, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/free-trial-2-days-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): $0.00 per 1,000, 22% complete
- [Z-API, $19.99 monthly, Ultimate Plan, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/19-99-monthly-ultimate-plan-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, R$99.99 monthly, Plano Ultimate, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/r-99-99-monthly-plano-ultimate-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, $179.90 monthly, Partner Plan, 10 to 49 instances, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/179-90-monthly-partner-plan-10-to-49-instances-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, $799.50 monthly, Partner Plan, 50 to 99 instances, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/799-50-monthly-partner-plan-50-to-99-instances-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, R$899.90 monthly, Plano Partner, 10 a 49 instâncias, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/r-899-90-monthly-plano-partner-10-a-49-instancias-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, $1,499 monthly, Partner Plan, 100 to 199 instances, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/1499-monthly-partner-plan-100-to-199-instances-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, $2,798 monthly, Partner Plan, 200 to 499 instances, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/2798-monthly-partner-plan-200-to-499-instances-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, R$3,999.50 monthly, Plano Partner, 50 a 99 instâncias, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/r-3999-50-monthly-plano-partner-50-a-99-instancias-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, $6,495 monthly, Partner Plan, 500 to 999 instances, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/6495-monthly-partner-plan-500-to-999-instances-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, R$7,499 monthly, Plano Partner, 100 a 199 instâncias, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/r-7499-monthly-plano-partner-100-a-199-instancias-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, $11,990 monthly, Partner Plan, 1,000 to 1,999 instances, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/11990-monthly-partner-plan-1000-to-1999-instances-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, R$13,998 monthly, Plano Partner, 200 a 499 instâncias, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/r-13998-monthly-plano-partner-200-a-499-instancias-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, $21,980 monthly, Partner Plan, 2,000 or more instances, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/21980-monthly-partner-plan-2000-or-more-instances-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, R$32,495 monthly, Plano Partner, 500 a 999 instâncias, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/r-32495-monthly-plano-partner-500-a-999-instancias-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, R$59,990 monthly, Plano Partner, 1.000 a 1.999 instâncias, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/r-59990-monthly-plano-partner-1-000-a-1-999-instancias-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, R$109,980 monthly, Plano Partner, 2.000 ou mais instâncias, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/r-109980-monthly-plano-partner-2-000-ou-mais-instancias-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, $215.90 yearly, Ultimate Plan, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/215-90-yearly-ultimate-plan-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete
- [Z-API, R$1,079.89 yearly, Plano Ultimate, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/r-1079-89-yearly-plano-ultimate-get-instances-instanceid-token-token-phone-exists-phone/llms.txt): no limit, 22% complete

## Z-API's calls (2)

- `POST /instances/{instanceId}/token/{token}/phone-exists-batch`: [Z-API, free trial, 2 days, POST /instances/{instanceId}/token/{token}/phone-exists-batch](https://datacircle.dev/validate-phone-apis/z-api/free-trial-2-days-post-instances-instanceid-token-token-phone-exists-batch/llms.txt)
- `GET /instances/{instanceId}/token/{token}/phone-exists/{phone}`: [Z-API, free trial, 2 days, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/free-trial-2-days-get-instances-instanceid-token-token-phone-exists-phone/llms.txt)

## Z-API's APIs (1)

- [Z-API: phone validation API pricing, 19 plans, GET /instances/{instanceId}/token/{token}/phone-exists/{phone}](https://datacircle.dev/validate-phone-apis/z-api/free-trial-2-days-get-instances-instanceid-token-token-phone-exists-phone/llms.txt)

## Z-API: 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

## 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://developer.z-api.io/_llms/en/api-reference.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://developer.z-api.io/en/contacts/get-iswhatsapp?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://developer.z-api.io/en/contacts/get-iswhatsapp-batch?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://developer.z-api.io/en/quickstart/introduction?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://www.z-api.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing