Official WhatsApp Business API in India: Price, Setup and Free Access

The official WhatsApp Business API is Meta’s platform that lets a business send approved template messages to any number of customers, reply from a shared team inbox, automate chats with a chatbot and connect WhatsApp to its own software, all from a verified business number. Access to the API itself is free on Fast2SMS: there is no monthly fee, no setup fee and no per-number fee, and you pay only per message. At the time of writing that is ₹0.25 for utility and authentication messages, ₹0.95 for marketing and ₹0.13 for service replies in India. Onboarding takes a few minutes through Meta’s embedded signup with your Facebook login, and you can keep your existing WhatsApp Business app number.

What is the official WhatsApp Business API?

The WhatsApp Business API is not an app you download from the Play Store. It is an interface that Meta (then Facebook) launched in 2018 for medium and large businesses, and today it runs as the WhatsApp Cloud API on Meta’s servers. A business connects its phone number to the API through a provider such as Fast2SMS, and from then on it can talk to thousands of customers with the feel of a one-to-one chat.

In simple words, the official API lets you:

• Send ready, pre-approved updates such as order confirmations, delivery alerts, payment receipts and reminders.
• Run marketing campaigns to opted-in customers with images, videos, PDFs and clickable buttons.
• Deliver OTPs and login codes with a copy-code button.
• Give one WhatsApp number to a whole support team through a shared inbox.
• Automate replies with a chatbot or AI agent, and hand over to a human when needed.
• Connect WhatsApp to your website, app, CRM, store or accounting software through a REST API and webhooks.

"Official" matters because WhatsApp only allows business messaging at scale through this route. Tools that automate a normal WhatsApp or WhatsApp Business app number are not official, break WhatsApp’s terms and put the number at risk of a ban.

WhatsApp vs WhatsApp Business app vs official API vs unofficial tools

Four things often get mixed up. Here is how they differ:

The free WhatsApp Business app is a good starting point for a small shop. When you need to message more customers than one phone can handle, share chats across a team or connect WhatsApp with your software, the official API is the next step. The help article WhatsApp Business app vs API covers this in more detail.

How the official API works (Cloud API and providers)

Meta runs the WhatsApp Cloud API, but most businesses do not connect to it directly. They use a provider (often called a Business Solution Provider, or BSP) that handles onboarding, template management, the team inbox, billing and a simpler API. With Fast2SMS you do not need your own Meta developer app: you connect the number through Facebook login in the panel, get templates approved there and call one REST endpoint.

Two kinds of conversations happen on the API:

• Business-initiated: you message the customer first, for example an order update, a reminder or an offer. These always use a template that Meta has approved.
• User-initiated: the customer messages you first. You can then reply freely, without a template, within 24 hours of their last message. This is called the customer service window.

Is WhatsApp Business API free?

The honest answer is: access can be free, messages are not. On Fast2SMS, the API access, number onboarding, panel, live chat inbox, agents, chatbot builder, AI agent, API and webhooks all cost nothing. There is no monthly fee and no setup fee. What you pay for is each message you send, at the rate for its category. Incoming customer messages are free.

So "free WhatsApp Business API" on Fast2SMS means you never pay rent for the platform; a business that sends nothing in a month pays nothing that month. New accounts also get ₹50 free credit after signup to test real messages. Many other platforms charge a monthly plan on top of the per-message cost, which is why total cost differs so much between providers. The help article on the free WhatsApp Business API walks through the setup with screenshots.

WhatsApp Business API price in India (2026)

These are Fast2SMS’s published India rates per message at the time of writing, excluding 18% GST:

How billing works

• Prepaid wallet. Recharge from ₹100 by UPI, card or net banking; ₹50 free credit is added after signup. The balance has unlimited validity and works for SMS, RCS and Smart OTP too.
• Delivery-basis billing. If a message fails, for example because the number is not on WhatsApp, or is still undelivered after 48 hours, the amount is refunded to your wallet automatically and listed in the refund report.
• Full transparency. Every recharge, debit and refund appears in transaction history with date, campaign and category, and a GST invoice is generated for every payment. Add your GSTIN in Settings to have it printed.
• High volume. Rates go down to ₹0.11 per message on high-volume plans. Share your monthly volume with sales for a custom rate.
• Other countries. The rates above are for Indian numbers; international rates show in the panel when you choose the destination.

A quick way to estimate your monthly bill: multiply expected messages in each category by its rate. For example, 20,000 order updates (₹5,000) plus 4,000 marketing messages (₹3,800) plus 3,000 agent replies (₹390) comes to ₹9,190 plus GST, with nothing added for agents, the chatbot or the API. See the WhatsApp pricing page for current rates.

Message categories: marketing, utility, authentication and service

Meta assigns a category to each template when it approves it, and the category decides the price. Choosing the right one helps approval and keeps your costs down.

Utility

Transactional or service updates the customer expects after an action: order confirmations, shipping updates, payment receipts, appointment reminders, subscription reminders and account alerts. Utility templates can have variables, a header, URLs and buttons such as "Call now" or "Book now", but no promotional content.

Authentication

Security messages only: OTPs and verification codes for login, signup, password reset, two-factor authentication or a new device. They have a copy-code button, can mention an expiry time, and must not contain links or promotional text. The WhatsApp OTP API guide covers this category in depth, including Smart OTP fallback to SMS.

Marketing

Anything promotional: offers, launches, festival campaigns, coupon codes and re-engagement messages, usually with an image or video header and buttons. This is the category used for bulk WhatsApp campaigns.

Service

Free-form replies you send within 24 hours of the customer’s last message, for example an agent answering a question in the inbox. No template is needed, and you can send text, images, documents, audio, video, location, stickers and reactions.

What you need to get the official WhatsApp Business API

• A Fast2SMS account, free at fast2sms.com.
• A genuine, older Facebook account. Meta can block or blacklist brand-new accounts during onboarding.
• A business portfolio in Facebook Business Manager. If you do not have one, you can create it during onboarding.
• A working website with your business name, logo and terms and conditions. Meta may review it manually, and a broken site can get the account suspended. You can use your website name as the business name.
• A phone number: a number that is not registered on WhatsApp yet (a landline that can receive a call works too), or your existing WhatsApp Business app number through coexistence.
• Business documents for verification later. You can start sending within the starting limit and submit documents to Meta, with help from Fast2SMS support, to raise it.

How to get the official WhatsApp Business API on Fast2SMS

1. Sign up and log in. Create a free account with your mobile number at fast2sms.com. ₹50 credit is added for testing.
2. Open WhatsApp Business and click Login with Facebook. Your number is first connected with Meta and then linked to Fast2SMS. Click Continue on the screens that confirm your Facebook profile.
3. Fill in your business information. Select your business portfolio or create one, enter the business name and your working website, then click Next.
4. Choose your number option. Pick "Connect your existing WhatsApp Business app" to keep using the app (coexistence), or "Start with a new WhatsApp phone number" for a number that will be managed only from Fast2SMS.
5. Verify the number. Enter the number, select India, and verify the OTP. Confirm the business name and time zone, review the details and continue.
6. For an existing app number, scan the QR code. WhatsApp asks you to connect to the business platform and whether to share chat history. Confirm, scan, and tap OK when it says you are connected to Fast2SMS.
7. Click Finish. This step is mandatory. If you close the browser before clicking Finish, the account is not created and embedded signup must be repeated from the start.
8. Check WhatsApp Manager. Select your number to see the business name, status and quality rating. Three pre-approved test templates (marketing, utility and authentication) are ready so you can send a test right away.
9. Create your own templates and start sending. Click Add Template, pick the category, submit to Meta, and send from the panel or the API once approved.

Prefer not to do it alone? Onboarding support is free. The Fast2SMS team can join you on a call to set up Facebook Business Manager, connect the number, set the display name and submit the green-tick request. Book a slot at fast2sms.com/meet. Most businesses are live within a day of connecting their number. The full screen-by-screen walk-through is in the onboarding guide.

Keep your WhatsApp Business app number (coexistence)

Many businesses worry that moving to the API means giving up the number customers already know. With WhatsApp coexistence, a Meta update, you do not have to. The same number works in the WhatsApp Business app on your phone and on the official Cloud API at the same time.

• You keep the app, your manual chats and status updates as before.
• You can choose to share past chat history with the platform, or only new chats.
• The account stays synced across the business platform, Fast2SMS and WhatsApp Web.
• You add bulk campaigns, the team inbox, chatbot and API on top.

If you connect a brand-new number instead, it is managed only from Fast2SMS and cannot also be used in the mobile app. Read what WhatsApp coexistence is for the full steps.

Display name, verification and green tick

Every template message shows your business display name, so customers know who is writing even if they never saved your number. Business verification by Meta, done by submitting company documents, is also what raises your daily messaging limit beyond the starting level.

The green tick is a separate badge that marks a business as verified and trusted. Fast2SMS guides the green-tick request from the panel and handles the paperwork with you for free. Approval of the tick is Meta’s decision, so no provider can guarantee it, but a complete website, consistent business name and verified documents give you the best chance.

Messaging limits, the 24-hour window and WhatsApp policy

Daily limit

A new number can start 250 business-initiated conversations per day. The limit rises as your number keeps a good quality rating, and rises faster after Meta verifies your business documents. Fast2SMS support helps you submit them.

Quality rating

WhatsApp Manager in your panel shows the quality rating of each number. It reflects how customers react to what you send. Blocks and reports pull it down, and a poor rating can hold back your limit or restrict the number. Send only to opted-in customers, keep marketing relevant and not too frequent, and give a clear opt-out such as "Reply STOP to opt out".

The 24-hour customer service window

When a customer messages you, a 24-hour window opens in which you can reply freely without a template; these replies are billed as service messages. Outside that window, or when you message first, you must use an approved template.

Policy basics

• Get opt-in before you message customers, and honour opt-outs.
• Use templates for anything you send first, in the correct category.
• Do not send spam, bought lists or content WhatsApp does not allow.
• Keep the business behind the number real and reachable: working website, correct business details.

Template approval tips

Templates are created in the panel with a live preview. You pick the category, add a header (image, video, document or location), write the body with numbered variables like {{1}} and {{2}}, add a footer and up to three buttons (quick reply, URL, call or copy code), then submit to Meta. Approval usually takes from a few minutes to a few hours, and an approval badge appears on the template when it is ready.

• Match content and category. The most common reason for trouble is a mis-categorised template.
• Add sample values for every variable so reviewers can read the final message.
• Be clear about who you are. Mention your business name and why the customer is receiving the message.
• No links in authentication templates, and no promotional lines in utility templates.
• Get a second look. The Fast2SMS team reviews templates before you submit them to Meta, at no cost.

Richer formats are available too: media templates, carousel templates for several products, and flows templates for forms. Templates can also be created, edited, deleted and listed through the API.

Features included free on Fast2SMS

Panel rental, agent seats, onboarding, chatbots and API access are where WhatsApp bills usually grow. On Fast2SMS they are part of every account:

• Live chat inbox: a WhatsApp Web style team inbox with assignment, labels, notes and full chat history.
• Unlimited agents with no per-seat fee, plus the Fast2SMS Agent app on Android.
• Flow Builder chatbot: drag-and-drop keyword triggers, menus, buttons, media, conditions, delays and an API-request block, with human handoff.
• AI agent: trained on your website, PDFs or FAQ to answer routine questions first.
• Bulk and scheduled campaigns: send to address-book groups, Excel or CSV uploads, or pasted numbers, with the cost shown before you confirm.
• Address book and groups reusable across WhatsApp, SMS and RCS.
• Delivery and read reports: sent, delivered, read and failed per number with the reason, a daily chart and Excel export.
• Template management and WhatsApp Manager: numbers, templates, message IDs and quality rating in one place.
• Media: images, videos and PDFs such as invoices inside template messages, with a custom file name.
• API and webhooks for every send and every event.

Want to automate without code? The free WhatsApp chatbot guide shows how to build a first bot in five steps.

WhatsApp Business API for developers

Fast2SMS uses one API key for SMS and WhatsApp, sent in the Authorization header. Full documentation is at docs.fast2sms.com.

Send a template message

curl "https://www.fast2sms.com/dev/whatsapp?message_id=9&phone_number_id=579519398574288&numbers=9999999999&variables_values=Rahul|1234" \
  -H "Authorization: YOUR_API_KEY"

{
  "status": true,
  "message": "Message sent successfully",
  "request_id": "6a3b2c1d"
}

• message_id: the ID of your approved template, shown in the panel.
• phone_number_id: your WhatsApp Business number’s ID.
• numbers: the recipient’s 10-digit Indian mobile number.
• variables_values: template variable values separated by a pipe.
• media_url and document_filename: optional, for image or PDF headers and the file name the customer sees.

You do not have to build these calls by hand. Under WhatsApp API in the panel you will see your authorization key, and one click downloads a sheet with a ready API for every approved template.

Session messages and template management

Inside the 24-hour window, free-form replies go through POST /dev/whatsapp-session with text, image, document, audio, video, location, sticker and reaction types. Templates can be created, edited, deleted and listed through the API, and the docs also include a full Meta-format API.

Webhooks

Create a WhatsApp webhook and Fast2SMS calls your URL with the events you choose: sent, delivered, read, failed or incoming messages. A delivered event looks like this:

{
  "request_id": "Wabcdef12345678",
  "mobile": "9999999999",
  "status": "delivered",
  "status_description": "Delivered successfully",
  "category": "UTILITY",
  "webhook_type": "status_update"
}

Incoming customer messages arrive with "webhook_type": "incoming_message", which is how custom chatbots are built. You can add up to 10 webhooks per channel with your own JSON payload template; each call has a 60-second timeout with 3 retries, logs are kept for 7 days with one-click resend, and requests can be signed with a shared secret header. Read how webhooks work and the WhatsApp chatbot API guide for complete examples.

Plugins and integrations

If you would rather not code, free plugins connect WhatsApp to WordPress and WooCommerce, Shopify and TallyPrime, and Zapier, Pabbly and CleverTap are supported. See the integrations page. For OTPs, Smart OTP sends on WhatsApp first and falls back to OTP SMS automatically from one API call.

How to choose an official WhatsApp Business API provider in India

Every official provider sends through the same Meta Cloud API, so the message reaches the customer the same way. What differs is what you pay on top and what you get around the API. Ask these questions before you sign up anywhere:

1. Is there a monthly or setup fee? A platform fee is paid even in months you send little.
2. Are agents, the inbox and the chatbot included, or sold as add-ons and higher plans?
3. Are failed messages refunded? Without refunds you pay for numbers that are not on WhatsApp.
4. Is onboarding help free, and will someone help with templates, verification and the green tick?
5. Is the API simple, with webhooks and clear documentation?
6. Can you keep your existing number through coexistence?
7. What support do you get: only email tickets, or chat, phone and meetings?
8. Can you use other channels such as SMS, RCS and voice from the same wallet?

Based on publicly listed plans of common WhatsApp Business API providers in India; details vary by provider.

Industries using the WhatsApp Business API

• Online stores: order and shipping updates from the order system, abandoned-cart recovery, COD confirmation to reduce RTO, invoice PDFs.
• Clinics and hospitals: appointment reminders the evening before with a confirm button, reports and follow-ups.
• Education: fee reminders, exam updates, results and admission campaigns.
• Banks, NBFCs and fintech: payment receipts and EMI reminders with the PDF attached, login OTPs.
• Real estate: project brochures, site-visit bookings and buyer updates.
• Apps and SaaS: signup and login OTPs with SMS fallback, account alerts, onboarding nudges.
• Accountants and distributors: invoices, receipts, ledgers and payment reminders from TallyPrime.
• Support teams: one number shared by many agents, with a chatbot answering first.

Most of these combine utility messages for updates (cheaper and expected) with a few well-targeted marketing campaigns. For the campaign side, read the bulk WhatsApp message guide.

Security, reliability and support

Fast2SMS has provided business messaging in India since 2011, more than 15 years, with 99.9% uptime. WhatsApp access is through Meta’s official Cloud API, with no unofficial WhatsApp Web automation. Contacts, chats and templates are stored encrypted, every panel page and API call runs over HTTPS, agents only see the chats assigned to them, and Fast2SMS is ISO 27001 and SOC 2 Type 2 certified and VAPT tested; see the certificates page.

Support is free and handled by people: chat inside the panel, phone at +91-6262778822, email at [email protected], or a free meeting for onboarding, template help or volume pricing at fast2sms.com/meet. You can also reach the team from the contact page.

Agencies that want to offer WhatsApp under their own brand can use the white-label reseller panel, which covers WhatsApp Business API, bulk SMS and RCS together; see the white label WhatsApp Business API guide.

Ready to start? Signup free on Fast2SMS, connect your number with free onboarding help and send your first template with the ₹50 free credit. Product details are on the WhatsApp Business API page, and RCS options are on the RCS message page.