Fix · Operations

WhatsApp Cloud API cannot send to a group chat.

The messages endpoint accepts a phone number but there is no way to address a group; the report meant for the department group never arrives.

Cause.

The WhatsApp Business Platform sends one-to-one messages from a business number to individual numbers. Group messaging is not part of the API. A business phone running the WhatsApp Business app can post to groups, but that is a different product with no API.

Fix.

01Decide the audience: the people in the group are the real recipients.
02Send the report one-to-one to each number on the distribution list; the agent keeps the list and the delivery receipts.
03If the group itself must carry the message, link a business phone that is in the group and post from it through a device bridge; accept that this is unsupported by Meta and can break.
04For a daily unprompted report, submit a utility template for approval; outside the 24-hour window only approved templates deliver.
05Register the sender number and the WhatsApp Business Account before launch; an unregistered number returns nothing at all.

How the build avoids it.

KYN’s morning report goes one-to-one to each person on the list with a utility template, and the delivery log shows who received it and when; a group post is offered only where the client runs a linked phone and accepts the trade-off.

Checked 13 October 2026 against a live build. Vendors change behaviour; if a step no longer matches, tell us and the page changes.

Questions operators ask

Can Meta add group messaging later?

Possibly; it is not on the API as of October 2026. Build for one-to-one and treat a group post as a bonus.

Does one-to-one cost more?

Each message is billed per recipient at Meta’s rate for the country, with 1,000 free service replies a month per number. A daily report to 12 people is 12 utility messages a day.

Why does my unprompted message not deliver?

Outside a customer-initiated 24-hour window, only an approved template delivers. Submit a utility template for the report and wait for approval before the first send.

Can the agent answer questions in the group?

Not through the API. It answers one-to-one; a question asked in the group is forwarded by a person or asked directly to the agent’s number.

Still stuck

Send the exact error text and the system. If it is a ten-minute fix we say so; if it is a build, we scope it.

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