مسرد WhatsApp Coexistence

Meta's official mode for running the WhatsApp Business app and the Cloud API on one number at the same time. Not a separate API: the same Cloud API, onboarded so the app keeps working.

Meta's hosted WhatsApp Business Platform API. Every send, template and webhook on this site runs through it.

The app a business uses on a phone. Distinct from the consumer WhatsApp app, and a number must be on it before Coexistence can connect it.

The Meta object that holds phone numbers and templates. Sits inside a Business Portfolio. Webhook overrides are applied at this level rather than per number.

The company level container in Meta Business Manager. Holds one or more WhatsApp Business Accounts. A client's number stays in their portfolio, not a provider's.

Meta's identifier for one connected number. Sending targets this rather than the number itself, and it appears in every inbound webhook payload.

Meta's own onboarding popup. Picks the portfolio, the account and the number, and for Coexistence includes a code scanned in the WhatsApp Business app.

A Meta status permitting a company to connect other businesses' numbers through its own approved app. Free to obtain, gated on business verification and App Review. Not an endorsement.

A company selling a messaging platform, usually a shared inbox. Overlaps with Tech Provider but describes the product rather than the Meta status.

Where Meta delivers a WhatsApp Business Account's events. Set as an override on an app's subscription, which is why removing a connection uninstalls it.

A value Meta sends in its verification GET. The endpoint must return it as the raw body. Returning JSON instead is the most common reason a webhook never receives anything.

The webhook field carrying what customers send. Part of the message path, which is what a webhook override routes away from a provider.

The webhook field carrying what a team sends from the WhatsApp Business app. Only exists on Coexistence numbers, and is how software sees a human's replies.

Twenty four hours from the customer's last message, during which free text delivers. Outside it, only an approved template does.

A message submitted to Meta for review in advance. The only thing that delivers outside the customer service window, and on a Coexistence number it can only be sent through the API.

Green, yellow or red, assigned by Meta from how recipients react. Falls before it costs anything, and nothing announces the fall.

How many unique customers a number may start conversations with per day. Moves in both directions. Distinct from throughput, which is a rate.

Messages per second a number may send. Fixed by Meta on a Coexistence number rather than scaling with quality and tier.

The consumer WhatsApp client signed in elsewhere, as WhatsApp Web does. What unofficial tools automate, what WhatsApp's terms prohibit, and what gets numbers banned.

How an AI assistant reaches a tool it does not own. Request and response only: an MCP server cannot be woken by an incoming message.