WhatsApp Business APIDocumentation
Comprehensive guides for integrating WhatsApp Business API. Learn messaging limits, templates, troubleshooting, and best practices.
Messaging
3 articles
What is WhatsApp Business API? The Complete Guide for 2026
WhatsApp Business API is a programmable interface that allows medium to large businesses to broadcast messages to unlimited users, automate customer support with chatbots, and integrate with CRM systems. Unlike the free WhatsApp Business App, the API enables enterprise-scale customer communication.
WhatsApp Business API Pricing in Singapore (2026 Guide)
See the real WhatsApp Business API pricing in Singapore — message fees, setup costs, and what SMEs actually pay in 2026. Explained simply.
Understanding WhatsApp Business Messaging Limits
Every WhatsApp Business account has a cap on how many unique customers you can message within a 24-hour window. This guide breaks down the different tiers, explains how Meta calculates your limit, and shows you proven strategies to scale up your messaging capacity over time.
Templates & Rules
2 articles
WhatsApp 24h Rule Explained: How Businesses Can Message Customers Again
Understand WhatsApp's 24-hour messaging window rule and learn how businesses can re-engage customers after the window closes. Discover how Envoy AI CRM helps you send messages again with smart features.
WhatsApp Template Best Practices: Get Approved, Avoid Rejection (2026 Guide)
Write WhatsApp Business API templates that get approved fast, avoid auto-recategorization to Marketing, and survive Meta's quality rating system. With Singapore PDPA compliance notes for Voltade clients.
Troubleshooting
21 articles
How to Fix Meta Error 459 (Account Checkpoint)
Error 459 from Meta indicates that your Facebook account has been checkpointed, meaning it is temporarily suspended for security reasons. This comprehensive guide shows you how to resolve this issue, including common scenarios like after paying for Meta verification.
WhatsApp Coexistence Limitations: What You Need to Know
Using WhatsApp Business App and Envoy together on the same number? Understand the key limitations of WhatsApp Coexistence mode, including the critical 14-day disconnection rule if you don't open the WhatsApp Business App regularly.
WhatsApp Account Blocked? How to Restore Access to Your Blocked Account
Learn how to restore access to your blocked WhatsApp account. This comprehensive guide covers temporary vs permanent blocks, 8 common reasons for account blocking, step-by-step recovery instructions, and proactive measures to prevent future blocks.
WhatsApp Error 131026: Message Undeliverable - Complete Troubleshooting Guide
Fix WhatsApp Error 131026 with this comprehensive troubleshooting guide. Learn all 10 causes of message delivery failures including recipient issues, template problems, and India-specific restrictions. Includes step-by-step debug checklist and prevention best practices.
WhatsApp Error Code 131060: Companion Device Message Visibility Issue
Learn how to resolve WhatsApp error code 131060, which occurs when messages are sent from companion devices in Coexistence mode. Understand why this happens and how Envoy CRM displays these errors clearly.
WhatsApp Error: Object With ID Does Not Exist or Missing Permissions
Fix the WhatsApp Business API error 'Unsupported post request. Object with ID does not exist, cannot be loaded due to missing permissions, or does not support this operation' by reauthorizing your Facebook connection.
WhatsApp Error: Session Has Expired - Access Token Validation Failed
Fix the WhatsApp Business API error 'Error validating access token: Session has expired' by reauthorizing your Facebook connection. Step-by-step guide to fix expired session issues.
How To Unban Your WhatsApp Account Within 24h
Learn how to appeal a WhatsApp ban and get your account restored. This guide covers temporary vs permanent bans, the official appeal process, email templates, and tips to avoid future bans for Singapore businesses.
WhatsApp Error #3: Application Does Not Have API Granular Permission
Fix the WhatsApp Business API error '(#3) Application does not have the API granular permission to make this call' by reauthorizing your Facebook connection and granting required permissions.
WhatsApp Error #200: You Do Not Have Permission to Send Messages
Fix the WhatsApp Business API error '(#200) You do not have the necessary permissions required to send messages on behalf of this WhatsApp Business Account' with solutions for both Coexistence and Non-Coexistence flows.
Unable to Remove WhatsApp Business App from Meta Business Portfolio
Cannot remove WhatsApp Business app from your Meta Business Portfolio? Learn how to fix this by adjusting your 2FA settings in Meta Business Suite before attempting removal.
WhatsApp Error: You Cannot Access the App Till You Log In to Facebook
Fix the WhatsApp Business API error 'You cannot access the app till you log in to www.facebook.com and follow the instructions given' by completing the Facebook verification process.
WhatsApp Error: Unable to Update Contact - Email Already Taken
Fix the WhatsApp CRM error 'Unable to update contact. Please try again later' caused by duplicate email addresses in your contact database.
WhatsApp Error: Template Name Not Found - 24-Hour Rule Explained
Fix the WhatsApp Business API error 'Template name not found' by understanding the 24-hour messaging window and how to use pre-approved message templates correctly.
WhatsApp Error: Need to Add Payment Method for Broadcast Campaigns
Fix the WhatsApp Business API error 'Need to add payment method first in order to use the WhatsApp campaign broadcast feature' by configuring payment settings in Meta Business Portfolio.
WhatsApp Error 131042: Business Eligibility Payment Issue - 72 Hour Block
Fix WhatsApp Business API error 131042 (business eligibility payment issue) by waiting 72 hours and avoiding retry attempts. Learn why this block happens and how to prevent it.
WhatsApp Error: Phone Number Not Eligible to Connect to Business Platform
Fix the WhatsApp error 'Your phone number is not eligible to connect to the WhatsApp Business Platform' by increasing app activity and recreating your account before onboarding.
WhatsApp Error: Phone Number Already Registered with INBOX Product
Fix the WhatsApp error 'This phone number is already registered with the INBOX product' by disconnecting the existing partner before onboarding with a new platform.
WhatsApp Disconnection: Messages Are Now End-to-End Encrypted Warning
Fix WhatsApp Business API disconnection identified by the yellow 'Messages and calls are now end-to-end encrypted' text. Learn how to re-onboard your number and restore connection.
WhatsApp Error: This Account Can No Longer Use WhatsApp - Appeal Guide
Fix the WhatsApp ban message 'This account can no longer use WhatsApp' by submitting a review request through Meta Direct Support. Step-by-step appeal process for banned accounts.
WhatsApp Business API Known Issues and Solutions (2026)
A practical troubleshooting index for common WhatsApp Business API issues, with root causes, fixes, and escalation paths for Singapore teams using Envoy.
Ready to integrate WhatsApp?
Envoy AI CRM handles all the complexity of WhatsApp Business API integration. No coding required - just connect and start messaging.