WhatsApp API by Retention Stack

What it does

A REST API for sending WhatsApp messages, images, files, and OTPs from any app. No WhatsApp Business verification. No Meta approval. Free plan on RapidAPI. First message in under 5 minutes.

The fastest WhatsApp REST API for developers. Send text, images, files, and OTPs. Manage groups, channels, and sessions programmatically. Start free on RapidAPI.

Send messages, images, files, and OTPs to any WhatsApp number via a simple REST API. Integrate in minutes. No approval queue. No Meta overhead. import requests url = "https://whatsapp-messaging-bot.p.rapidapi.com/v1/sendText" headers = { "x-rapidapi-key": "YOUR_API_KEY", "x-rapidapi-host": "whatsapp-messaging-bot.p.rapidapi.com", "Content-Type": "application/json" } payload = { "chatId": "1234567890", "text": "Check this out: https://example.com", "session": "default", "linkPreview": True, "linkPreviewHighQuality": True } response = requests.post(url, json=payload, headers=headers) print(response.json()) Message delivered to +1 234 567 890 send_message.py Python JavaScript cURL import…from whatsapp-messaging.retentionstack.agency

• 
  SendAPIMar 2026 · sendapi.co · ▲2

  The Multichannel Messaging API for WhatsApp, SMS & Email.

• 
  Alt Pass2023 · ▲72

  A future without OTPs, sign up with WhatsApp

• 
  Whatsapp Quick Messages2019 · zeroqode.com · ▲94

  Send Whatsapp messages without having to save the number

• 
  API of MessengerAug 2026 · api2whats.com · ▲3

  Reliable WhatsApp Business API for developers and businesses

• 
  Simple WhatsApp API (Open Source)2025 · github.com · ▲15

  Had a Lot of issues with existing APIs especially with Attachment support. Hence built own Whatsapp API. Currently only Send Messages

• 
  WABridgesJul 2026 · wabridges.com · ▲6

  WhatsApp REST API - $5/mo flat, no Meta approval

• 
  /dev/null▲484

  a social network for devs

  Dev tools · 3d ago · dev-null.sh

• 
  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 28d ago · github.com

• 
  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 26d ago · github.com

• 
  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 23d ago · openbot.run

• 
  Talanoa▲346

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 21d ago · talanoa.email

• 
  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 28d ago · corespeed.io

• 
  Lightfield▲901

  AI-native CRM that builds itself and does work for you

  AI · Mar 2026 · lightfield.app

• 
  Tobira.ai▲728

  A network where AI agents find deals for their humans

  AI · Mar 2026 · tobira.ai

• 
  Claude Import Memory▲716

  Switch from ChatGPT to Claude with import memory feature

  AI · Mar 2026 · claude.com

• 
  Littlebird▲709

  Littlebird remembers everything across your meetings, messages, docs, and apps, then takes action so you can recall any detail and never lose context.

  AI · Mar 2026 · littlebird.ai

• 
  Viktor.com▲702

  Your AI Coworker that proactively executes tasks

  AI · Mar 2026 · viktor.com

• 
  Jupid▲659

  File your taxes with Claude Code

  Commerce · Mar 2026 · jupid.com