What does WhatsApp API do?

Allowing developers to programmatically send WhatsApp messages and manage sessions via a simple API. It is catalogued under VoIP, telephony & mobile networks on PulseGate.

Who should use WhatsApp API?

WhatsApp API is a B2B product built for developers needing WhatsApp messaging integration.

Is WhatsApp API free?

Yes — there is a free tier, with paid plans for advanced use.

Is WhatsApp API still active?

Unverified. WhatsApp API has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

Who makes WhatsApp API?

WhatsApp API is developed by Retention Stack.

When did WhatsApp API launch?

WhatsApp API first shipped in 2023.

Does WhatsApp API have an API or integrations?

Yes — WhatsApp API exposes a public API.

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WhatsApp API

Name: WhatsApp API
Author: Retention Stack

retentionstack.agencyInfrastructure

WhatsApp API by Retention Stack provides a RESTful API for developers to send messages, images, files, and manage WhatsApp groups and sessions. It is designed for easy integration and rapid deployment, with a free tier available via RapidAPI.

FreemiumAPICloud-managed

Visit retentionstack.agency

Overview

6 features

In the VoIP, telephony & mobile networks space, WhatsApp API takes a focused approach. Allowing developers to programmatically send WhatsApp messages and manage sessions via a simple API. WhatsApp API is a B2B product aimed at developers needing WhatsApp messaging integration. There is a free tier. It runs on API.

It is developed by Retention Stack, and it first shipped in 2023. Key capabilities include Send WhatsApp messages, REST API, and media support. It exposes integrations via a public API.

Summary written by a language model from the project’s public pages.

Send WhatsApp messages
REST API
Media support
Group management
Session management
RapidAPI integration

Built with & integrations

Framework

Next.js

Hosting

Vercel

Connectors

API

Runs on

API-onlyCloud-managed

Detected from

Next.js: x-nextjs-prerender header · /_next/static/ in the HTML · __next_f in the HTML
Vercel: x-vercel-id header · x-vercel-cache header

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tier

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed16 Jun · 19:45 UTC
Listing verified against its public source
Source: PulseGate · Open

Frequently asked questions about WhatsApp API

What does WhatsApp API do?: Allowing developers to programmatically send WhatsApp messages and manage sessions via a simple API. It is catalogued under VoIP, telephony & mobile networks on PulseGate.
Who should use WhatsApp API?: WhatsApp API is a B2B product built for developers needing WhatsApp messaging integration.
Is WhatsApp API free?: Yes — there is a free tier, with paid plans for advanced use.
What platforms does WhatsApp API run on?: WhatsApp API runs on API.
Is WhatsApp API still active?: Unverified. WhatsApp API has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
Who makes WhatsApp API?: WhatsApp API is developed by Retention Stack.
When did WhatsApp API launch?: WhatsApp API first shipped in 2023.
Does WhatsApp API have an API or integrations?: Yes — WhatsApp API exposes a public API.

At a glance

Pricing: Freemium · pricing page detected · free tier
Platforms: API
Languages: English
Built for: developers needing WhatsApp messaging integration
Model: B2B
Solves: Allowing developers to programmatically send WhatsApp messages and manage sessions via a simple API.

Developer

Retention Stack

Index record

Indexed: 16 Jun 2026
Lifecycle: Alive
Last seen: 16 Jun 2026

Identity audit (12)

Slug: whatsapp-api-send-messages-via-rest-free-plan-on-retentionstack-agency
Lifecycle last checked: 8 Aug 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 16 Jun 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
Category from: Recorded source: taxonomy-pass-b.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Canonical URL: https://whatsapp-messaging.retentionstack.agency/

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