How do I connect WhatsApp to my chatbot?

You connect WhatsApp to a chatbot by using the official WhatsApp Business Platform (Cloud API), a Business Solution Provider, or a no-code platform. For CustomGPT.ai, you create an agent, get an API key, then route WhatsApp messages through Cloud API or Twilio into the CustomGPT API. 

TL;DR

Transform WhatsApp from a manual support channel into an automated Conversational Commerce Engine. By connecting the official WhatsApp Business API to CustomGPT.ai, you deploy a Business AI Agent that resolves customer queries instantly using your verified data (RAG). This approach ensures accurate, hallucination-free responses while keeping your automation strictly task-specific to comply with Meta’s 2026 policies.

Scope:
Last updated: November 2025; applies to WhatsApp Business Platform task-specific chatbots; align with Meta’s 2026 AI policy and local privacy laws such as GDPR and CCPA/CPRA.

Why Connect WhatsApp to CustomGPT.ai?

WhatsApp is the world’s most popular messaging platform, boasting over 2 billion active users and an incredible open rate of nearly 98%. Your customers are already there, and they expect instant answers.

By integrating CustomGPT.ai with WhatsApp, you transform a standard messaging channel into an always-on customer service powerhouse. Instead of relying on frustrating “menu trees” (e.g., Press 1 for Sales) or making customers wait for human agents, you can provide instant, accurate responses based directly on your business content.

Here is why this integration is a game-changer for business communication:

• Unmatched Engagement: With open rates significantly higher than email, your automated responses are virtually guaranteed to be seen and acted upon.
• 24/7 Automated Support: Your bot doesn’t sleep. It resolves queries about order status, return policies, or product details instantly, day or night.
• Trustworthy AI: Unlike generic models that might “hallucinate” facts, CustomGPT.ai answers using only your uploaded business data (RAG), ensuring customers get factual, brand-safe information.
• Frictionless Experience: Customers don’t need to navigate a complex website or download a support app; they get help right in the chat interface they use every day.
• Handle Voice Notes Automatically: Your customers are on the go. Don’t force them to type. With CustomGPT.ai’s multimodal support, your bot can ingest WhatsApp voice notes, transcribe them, and reply with accurate text instantly.

Prerequisites for connecting a chatbot to WhatsApp

Before you wire any code, decide which WhatsApp product you actually need:

Pick the right WhatsApp product (Business App vs Business Platform)

• WhatsApp Business App
  • Phone-based app, designed for small teams replying manually.
  • No official API access for custom chatbots.
• WhatsApp Business Platform (API / Cloud API)
  • API-first product used for automated messaging and chatbots.
  • Exposed via the Meta-hosted Cloud API, or via a Business Solution Provider (BSP). 

Key prerequisites:

1. Meta Business Manager + WhatsApp Business Account (WABA) with a verified business.
2. A dedicated phone number you can assign to WhatsApp Business Platform (not used for the app at the same time).
3. Approved message templates for outbound notifications (e.g., order updates).
4. A chatbot backend or platform (CustomGPT.ai, your own app, or a no-code chatbot builder).
5. Policy compliance: From January 15, 2026, WhatsApp bans general-purpose AI chatbots on the Business Platform. Only task-specific business bots (support, bookings, order status, etc.) remain allowed.

Option 1: Connect via WhatsApp Business Platform (Cloud API)

This is the most direct, “official” route if you’re comfortable managing an API.

Steps (Cloud API → your chatbot)

1. Create a Meta developer account and app
   • Go to Meta for Developers and create an app that uses the WhatsApp Business Platform.
   • Link it to your WhatsApp Business Account and phone number.
2. Get your Cloud API credentials
   • Note your phone_number_id, WhatsApp Business Account ID, and a permanent access token.
   • These are used to call the /messages endpoint from your backend.
3. Set up webhooks to receive messages
   • Expose an HTTPS endpoint (e.g., /webhook/whatsapp) from your chatbot server.
   • Configure the webhook URL and verify the token in your WhatsApp app settings so WhatsApp can send you incoming messages.
4. Wire the webhook to your chatbot logic
   • On each incoming message, parse the JSON payload and pass the user’s text to your chatbot engine (CustomGPT.ai, your own model, or rules).
   • Capture the chatbot’s response text.
5. Send replies back via the Cloud API
   • Call the POST /{phone_number_id}/messages endpoint with the customer’s phone number and your reply text.
6. Handle templates, media, and errors
   • Register templates for outbound notifications.
   • Add retry logic and logging in your integration to handle rate limits and failures.

Option 2: Connect via a WhatsApp Business Solution Provider (BSP)

If you don’t want to manage Meta’s APIs directly, use a BSP like Twilio, Infobip, or similar.

Steps (BSP → your chatbot)

1. Choose and sign up with a BSP
   • Create an account with a provider that offers official WhatsApp Business API access.
   • These platforms handle hosting, scaling, and some Meta compliance for you.
2. Onboard your WhatsApp number and business
   • Use the BSP’s embedded onboarding to connect your Meta Business account and phone number.
   • Complete verification and number approval steps.
3. Configure message templates and routing
   • In the BSP console, set up WhatsApp templates and inbound routing rules pointing to your webhook or function.
4. Connect your chatbot via the BSP’s API or webhooks
   • The BSP exposes its own REST API or webhook format.
   • For each inbound message webhook, pass the user’s text into your chatbot, then reply via the BSP’s “send message” endpoint.
5. Test and go live
   • Use sandbox/test numbers to verify the full loop: user → WhatsApp → BSP → your bot → BSP → WhatsApp.
   • Then move to production numbers and monitor delivery, errors, and quality metrics.

Option 3: Use a no-code chatbot platform with WhatsApp integration

This is ideal if you prefer visual builders over code.

Steps (no-code bot builder → WhatsApp)

1. Pick a platform that supports WhatsApp
   • Choose a tool that offers a built-in WhatsApp channel, often powered by Cloud API or a BSP under the hood.
   • Confirm it supports your region, volume, and use case (support, FAQs, etc.).
2. Connect your WhatsApp Business account
   • Inside the platform, follow their wizard to connect Meta Cloud API or your BSP account.
   • Finish business verification, number linking, and template approval.
3. Design your chatbot experience
   • Use the visual builder to create FAQ flows, intent routing, or API calls to your backend or CustomGPT.ai.
   • Define fallbacks for unrecognized questions.
4. Test the WhatsApp channel end-to-end
   • Send test messages from your own WhatsApp to make sure the flows, delays, and formatting look right.
5. Launch and monitor
   • Gradually roll out to real customers, track resolution rates and handoff to human agents, and tune the flows.

Remember: your bot must be business-task focused, not a generic AI assistant, to comply with WhatsApp’s 2026 rules.

How to do it with CustomGPT.ai

This section walks through connecting WhatsApp to a CustomGPT.ai agent while staying within WhatsApp’s policy (business support use cases, not general-purpose AI).

Steps (WhatsApp → CustomGPT.ai)

1. Create and configure your CustomGPT.ai agent
   • Sign in to CustomGPT.ai, create an agent (project), and add your content: help center, policies, product pages, etc.
2. Generate an API key for the agent
   • Follow the API quickstart guide to create an API key.
   • Note the project/agent ID and API key; you’ll use them from your integration.
3. Test the CustomGPT API from your environment
   • Use the quickstart or API reference to:
     • List agents (projects).
     • Create a conversation session.
     • Send a message and receive a reply.
4. Choose your WhatsApp transport
   You have two documented patterns:
   • Facebook + Make.com flow
     • Use the CustomGPT.ai WhatsApp integration guide to:
       • Configure your Facebook Developer app and WhatsApp Business account.
       • Use Make.com scenarios to “Watch WhatsApp messages” and “Send replies.”
       • Call the CustomGPT API from Make.com to get answers.
   • Twilio WhatsApp open-source integration
     • Use the “WhatsApp bot using APIs and Twilio” reference implementation.
     • It shows a Twilio sandbox, webhook endpoint, environment variables, and how to call CustomGPT from Python.
5. Map the WhatsApp message flow to CustomGPT
   In either pattern:
   • Incoming WhatsApp message → parsed by Make.com or your Twilio/webhook code.
   • That text is sent to your CustomGPT agent via the send message API.
   • You receive the agent’s reply text and send it back to the user on WhatsApp.
6. Constrain the bot to allowed use cases
   • Configure your agent content so it only answers about your business (orders, support, bookings, etc.), not general open-ended questions.
   • This aligns with WhatsApp’s 2026 policy against general-purpose AI chatbots.
7. Monitor and iterate
   • Use your own logging plus CustomGPT usage metrics to track response quality and adjust your data set and prompts. 

All claims in this section are based on documented capabilities from docs.customgpt.ai. If a specific connector isn’t explicitly documented, keep the implementation conservative and follow the official examples (Make.com and Twilio) closely. 

Example: Small business support bot on WhatsApp

Imagine a small ecommerce brand that wants customers to ask “Where’s my order?” or “What’s your return policy?” directly in WhatsApp.

1. Pick the path
   • They choose WhatsApp Cloud API via a BSP (like Twilio) to simplify setup, and CustomGPT.ai for the AI agent.
2. Prepare WhatsApp access
   • The business verifies its Meta Business account, connects a phone number, and completes onboarding with the BSP. 
3. Build the CustomGPT.ai agent
   • They upload FAQs, policy pages, and order-tracking docs into a CustomGPT agent, then test that it answers correctly on the web. 
4. Wire WhatsApp to CustomGPT
   • The BSP sends incoming WhatsApp messages to a webhook.
   • The webhook calls CustomGPT’s API with the user message and returns the response via the BSP’s “send message” endpoint. 
5. Launch with policy-safe scope
   • The bot clearly presents itself as the store’s helper.
   • It only answers questions about orders and store policies, no general-purpose AI chit-chat, so it stays within WhatsApp’s rules. 
6. Measure outcomes
   • Over time they track how many WhatsApp conversations are fully resolved by the bot and tweak the agent content and templates accordingly. 

The Cost of Automating WhatsApp Chatbot (2026 Pricing)

Unlike the free personal app, the WhatsApp Business Platform (API) charges businesses based on message volume and category. As of January 2026, Meta uses a Per-Message Pricing model.

Understanding this is critical for your CustomGPT.ai bot: Support replies are free, but proactive notifications cost money.

The 4 Pricing Categories

Pricing depends entirely on the template category of the message sent.

Category	Description	Cost Status (2026)
Service	User-Initiated. When a customer messages you (e.g., “Where is my order?”), it opens a 24-hour “Service Window.”	FREE (Unlimited) (Previously capped at 1,000/mo, now unlimited for inbound support)
Utility	Business-Initiated. Transactional updates (e.g., “Your order #123 has shipped”).	Paid per Message* (Cost is generally low, e.g., ~$0.003 in N. America)
Authentication	Business-Initiated. One-time passcodes (OTPs) for login verification.	Paid per Message (Lower than marketing, higher than utility)
Marketing	Business-Initiated. Promotional offers, newsletters, or re-engaging users after 24 hours.	Paid per Message (Most expensive category)

Conclusion

Your customers are already on WhatsApp, but managing those conversations manually at scale is a recipe for operational bottlenecks.

CustomGPT.ai serves as the intelligent backend for your Business API or Twilio setup, instantly resolving routine inquiries about shipping and policies while strictly adhering to Meta’s automation guidelines. This integration allows you to maintain a 24/7 presence on the world’s most popular messaging app without sacrificing accuracy or compliance.

Configure your WhatsApp API integration today to automate support delivery right where your audience lives.

FAQs

How do I connect WhatsApp Business Platform to my chatbot?

To connect WhatsApp Business Platform to your chatbot, first choose the API-based product, not the phone-based WhatsApp Business App. Set up a Meta Business account, verify your business, link a dedicated number, then use Cloud API or a Business Solution Provider to receive webhooks and send replies from your bot. You can also use a no-code builder with a WhatsApp channel if you prefer visual flows over handling raw APIs.

How can I use CustomGPT.ai as a WhatsApp support chatbot?

To use CustomGPT.ai as a WhatsApp support chatbot, create an agent with your help center, policy, and product content, then generate an API key. Route incoming WhatsApp messages from Cloud API, Make.com, or Twilio into the CustomGPT API, send back the agent’s replies, and keep the bot focused on business tasks like support or order status to comply with WhatsApp’s 2026 rules.

How to add a “Human Handoff” Protocol?

Not every query is for AI. You can set up a keyword trigger (e.g., ‘Talk to agent’) that pauses the CustomGPT bot and alerts your support team via Slack or Zendesk, ensuring high-touch issues get human attention.