---
title: "message_send"
description: "Requires `requestId`."
---

| Tool | Kind | Purpose |
| :-- | :-- | :-- |
| `message_send` | write | Requires `requestId`. Sends a text to a contact of the contacts table, by `contactRecordId` or `phone`, optionally quoting `replyTo`. Reuse the same `requestId` and arguments on retry to recover the original receipt without sending again. WhatsApp allows free text only within 24 hours of the contact's last message (`window_closed` after). Needs write on every record of the contacts table. |

Group: [WhatsApp](/docs/en-US/agents/mcp/whatsapp).