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.
| 01 | Decide the audience: the people in the group are the real recipients. | |
| 02 | Send the report one-to-one to each number on the distribution list; the agent keeps the list and the delivery receipts. | |
| 03 | If 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. | |
| 04 | For a daily unprompted report, submit a utility template for approval; outside the 24-hour window only approved templates deliver. | |
| 05 | Register 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.