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Documentation

Build on WhatsApp without the boilerplate.

REST API, webhooks, SDKs and step-by-step playbooks for every BulkMessageSender workflow.

API reference → View on GitHub

Quickstart

From sign-up to your first sent message in under 10 minutes.

Send your first template →Authenticate the API →Verify your number →

API reference

Every endpoint, every parameter, with cURL and Node samples.

Messages →Contacts →Templates →

Webhooks

Signed events, retry budget, replay tooling.

Event types →Signature verification →Replay events →

SDKs

First-party libraries that handle pagination, retries and rate limits.

Node.js →Python →PHP →Go →

Integrations

Drop-in installers for Shopify, WooCommerce, Razorpay, Zoho and more.

Shopify →WooCommerce →Razorpay →

Playbooks

Opinionated guides for cart-recovery, OTPs, admissions and more.

Cart abandoned flow →OTP login flow →Admissions funnel →

Meta verification

How to get your business verified and templates approved fast.

Business verification checklist →Template do's and don'ts →

Security

RBAC, audit logs, encryption, sub-processors.

SOC 2 / ISO 27001 →Data residency →DPA →

Migration

Moving from another BSP? Here's the path of least pain.

Full migration guide →Number porting →Template migration →

Code samples that just work.

Copy-paste this into Node and you've sent a templated WhatsApp message.

// Send an order-shipped template via the BulkMessageSender API
const r = await fetch("https://api.wachat.serves.in/v2/messages", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.WACHAT_KEY}`,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    to: "+919810237741",
    template: "order_shipped_v3",
    language: "en",
    vars: { order_id: "12847", tracking_url: "wc.in/t/12847" }
  })
});
// → { id: "msg_01HXY...", status: "queued", cost: { category: "utility", inr: 0.115 } }