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.
The pjsip.conf settings that matter for the WhatsMCP bridge: G.722/G.711 codec order, endpoint vs trunk, NAT, one call per number, and what doesn't cross.
How WhatsApp Business API templates work: categories, variables, limits, common rejection reasons, 10 examples, and sending them from an AI agent.
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.
Why every WhatsApp number should have its own exit IP, and how to set per-account egress in WhatsMCP — Direct, WireGuard or SOCKS5 — with screenshots and operating tips for keeping a fleet of numbers healthy.
An inside look at our proxy layer, fingerprint emulation, and distributed egress management designed to mimic official client traffic profiles.
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