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.

Freemium

APICloud-managed

Visit retentionstack.agency

Overview

6 features

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

Built with & integrations

Framework: nextjs
Hosting: vercel
Connectors: API
Runs on: API-onlyCloud-managed

Trust & compliance

LicenseProprietary

Verified signals

HTTPS Privacy Policy Terms of Service Free tier

Legal

Recent events

Latest indexed changes and source events

IndexedJun 16, 7:45 PM
retentionstack.agency discovered by the PulseGate indexer
Source: PulseGate indexerOpen ↗

At a glance

Pricing: Freemium · pricing page detected · free tier
Platforms: Api
Languages: English
First seen: Jul 30, 2023
Activity: 🟢 Active
Status: 🟢 Active
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

PulseGate index

Confidence: High · 95
Indexed: Jun 16, 2026
Lifecycle: Alive
Activity: Active
First seen: Jul 2023
Last seen: 4w ago
Freshness: Unknown

Identity audit (9)

Entity ID: cmqh20gwl07bv8doj4a8m0cux
Slug: whatsapp-api-send-messages-via-rest-free-plan-on-retentionstack-agency
Verification state: Indexed for public listing
Claim / listing state: Unclaimed · listed: yes
Index status: Included in index
Latest evidence snapshot: Jun 16, 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Last updated: Jun 16, 2026
Canonical URL: https://whatsapp-messaging.retentionstack.agency/

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