# WasenderAPI, free: Phone validation API > Verifies if a given phone number, WhatsApp JID, or username handle is registered on WhatsApp. WasenderAPI's phone validation API on its Trial 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. You get up to 3,000 calls a month. We rank 722 plans by price. [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 [Abstract API](https://datacircle.dev/validate-phone-apis/abstract-api/19-monthly-starter-5000-requests-month/llms.txt) are the best phone validation API providers in our benchmark. - This page: https://datacircle.dev/validate-phone-apis/wasenderapi/free - [Best phone validation API in 2026: providers compared](https://datacircle.dev/best-phone-validation-api.txt) - Get it: https://wasenderapi.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing - Request: `GET https://www.wasenderapi.com/api/on-whatsapp/{contact_identifier}` - API key: with the plan, on https://wasenderapi.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing - Its API docs: https://wasenderapi.com/api-docs/sessions/check-if-a-contact-is-on-whatsapp?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing - Sold by: WasenderAPI (https://wasenderapi.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 - Per: call - Billing: free ## Aggregators - Aggregators: none ## Charges - Also pays for: 64 other calls ## Not found - $ per 1,000: $0.00 ## In their words - Their pitch: Verifies if a given phone number, WhatsApp JID, or username handle is registered on WhatsApp. ## Data - Freshness: live - What it checks: messaging apps - Keep data: no limit - Use data: API Terms: Customers may access their WasenderApi account data via an API (Application Program Interface). Any use of the API, including use of the API through a third-party product that accesses WasenderApi, is bound by these Terms of Service. [...] Abuse or excessively frequent requests to WasenderApi via the API may result in the temporary or permanent suspension of your account's access to the API. WasenderApi, in its sole discretion, will determine abuse or excessive usage of the API. Account Terms: You may not use the Service for any illegal or unauthorized purpose. You must not, in the use of the Service, violate any laws in your jurisdiction (including but not limited to copyright laws). WhatsApp Usage Compliance and Disclaimer: You agree to comply with WhatsApp's Terms of Service and Business Policy when using our Service to interact with the WhatsApp platform. [...] User Obligations and Consent: The customer is strictly prohibited from sending any message that falls under the following categories: Spam or bulk messages. Messages that may cause malfunction of the Developer's equipment. Messages sent via pornographic or other reprehensible messengers. Messages that mislead users, such as those sent from someone else's name or giving false information. Transmitting inaccurate or confidential information. Transfer of information that has been unlawfully obtained by the Customer and/or violates the copyrights or related rights of third parties. Advertising alcohol, tobacco, drugs, or other illegal means. Transmission of information that violates the norms of the current legislation or international law. You must not use the Service for any activity that violates applicable laws or third-party rights. ## Plan - Pay: $0 - Enough for: 3,000 calls a month ## Rate limit - Per day: 100 - Per second: 0.17 - Batch: 1 ## Speed - Answer: in the call ## The call - You send: contact_identifier - Method: GET - Path: /api/on-whatsapp/{contact_identifier} ## About the plan - Plan: Trial - Who can get it: anyone 18 years or older with a WhatsApp number to link to a session by QR code, no credit card required ## The only field the plan's answer can hold registered on WhatsApp ## WasenderAPI's plans (10) - [WasenderAPI, free](https://datacircle.dev/validate-phone-apis/wasenderapi/free/llms.txt): $0.00 per 1,000, 0% complete, live - [WasenderAPI, $6 monthly](https://datacircle.dev/validate-phone-apis/wasenderapi/6-monthly/llms.txt): $0.20 per 1,000, 0% complete, live - [WasenderAPI, $15 monthly](https://datacircle.dev/validate-phone-apis/wasenderapi/15-monthly/llms.txt): $0.167 per 1,000, 0% complete, live - [WasenderAPI, $30 monthly](https://datacircle.dev/validate-phone-apis/wasenderapi/30-monthly/llms.txt): $0.167 per 1,000, 0% complete, live - [WasenderAPI, $45 monthly](https://datacircle.dev/validate-phone-apis/wasenderapi/45-monthly/llms.txt): $0.15 per 1,000, 0% complete, live - [WasenderAPI, $61.20 yearly](https://datacircle.dev/validate-phone-apis/wasenderapi/61-20-yearly/llms.txt): $0.17 per 1,000, 0% complete, live - [WasenderAPI, $153 yearly](https://datacircle.dev/validate-phone-apis/wasenderapi/153-yearly/llms.txt): $0.142 per 1,000, 0% complete, live - [WasenderAPI, $306 yearly](https://datacircle.dev/validate-phone-apis/wasenderapi/306-yearly/llms.txt): $0.142 per 1,000, 0% complete, live - [WasenderAPI, $459 yearly](https://datacircle.dev/validate-phone-apis/wasenderapi/459-yearly/llms.txt): $0.128 per 1,000, 0% complete, live - [WasenderAPI, contact us](https://datacircle.dev/validate-phone-apis/wasenderapi/contact-us/llms.txt): 0% complete, live ## WasenderAPI's calls (1) - `GET /api/on-whatsapp/{contact_identifier}`: [WasenderAPI, free](https://datacircle.dev/validate-phone-apis/wasenderapi/free/llms.txt) ## WasenderAPI's APIs (1) - [WasenderAPI: phone validation API pricing, 10 plans](https://datacircle.dev/validate-phone-apis/wasenderapi/free/llms.txt) ## WasenderAPI: phone validation API alternatives - [CheckNumber.AI, top-up from $20, Pay as you go, POST /v1/tasks, WhatsApp Advanced](https://datacircle.dev/validate-phone-apis/checknumber-ai/top-up-from-20-pay-as-you-go-post-v1-tasks-whatsapp-advanced/llms.txt): $0.10 per 1,000, 11% complete, live - [2Chat, $100 pack, Extra requests package, GET /open/whatsapp/check-number/{your-number}/{number-to-check}, Check Number](https://datacircle.dev/validate-phone-apis/2chat/100-pack-extra-requests-package-get-open-whatsapp-check-number-your-number-number-to-check-check-number/llms.txt): $0.20 per 1,000, 33% complete, live - [ZelNum, $2,000 pack, Pay as you go, $2,000 top-up, POST /detect, HLR Lookup](https://datacircle.dev/validate-phone-apis/zelnum/2000-pack-pay-as-you-go-2000-top-up-post-detect-hlr-lookup/llms.txt): $0.32 per 1,000, 33% complete, live - [Phone-Check.app, $79.99 monthly, Business, GET /v1-get-phone-extra-details](https://datacircle.dev/validate-phone-apis/phone-check-app/79-99-monthly-business-get-v1-get-phone-extra-details/llms.txt): $0.552 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://wasenderapi.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing - https://wasenderapi.com/api-docs/rate-limits/understanding-rate-limits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing - https://wasenderapi.com/api-docs/sessions/check-if-a-contact-is-on-whatsapp?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing - https://wasenderapi.com/help/account-billing/free-trial-limits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing - https://wasenderapi.com/help/account-billing/subscription-plans?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing - https://wasenderapi.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing - https://wasenderapi.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing - https://wasenderapi.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing