Step-by-step guides to connect WhatsApp to Claude, ChatGPT, Cursor, Grok and your PBX, plus the engineering behind it: SIP bridging, the MLow voice codec, webhooks and per-number egress.
Connect your official WhatsApp Business API number to ChatGPT with WhatsMCP: Embedded Signup, Developer mode, templates and the 24-hour window.
Put your official WhatsApp Business API number in Claude: Embedded Signup, one MCP URL, templates and Meta's 24-hour window handled for you.
Connect WhatsApp to Claude Code, Claude Desktop and claude.ai with WhatsMCP: one MCP URL, OAuth sign-in, 45 tools. Setup, prompts and FAQ.
Connect WhatsApp to ChatGPT with WhatsMCP: turn on Developer mode, add one MCP URL, sign in with OAuth. Read, reply and manage groups from ChatGPT.
Connect WhatsApp to Grok with WhatsMCP: a custom connector on grok.com, or the xAI API's remote MCP tool. Setup, code samples, prompts and FAQ.
Personal WhatsApp or the WhatsApp Business API for your AI agent? Features, rules, costs and setup compared, with a simple way to choose.
Connect WhatsApp to OpenAI Codex with WhatsMCP: codex mcp add and login, or config.toml with an env-var API key. Setup, prompts and FAQ.
Connect WhatsApp to Cursor's agent with WhatsMCP: add one entry to mcp.json, sign in with OAuth or an env-var API key, and build against a real number.
A builder's field guide to Model Context Protocol servers in 2026: shaping tools as an agent UI, escaping the context tax with code execution, defending against tool poisoning, and living with the new stateless spec.
How we built a clean-room, pure-Go encoder and decoder for MLow — Meta's low-bitrate codec behind billions of WhatsApp, Messenger and Instagram calls: the hybrid SILK/CELT structure, reverse-engineering it against the live library, and frame-exact validation.
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