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teams.microsoft.com

Send Chat Message

Automatically send Chat Message on teams.microsoft.com. Send a message in a 1:1 Teams chat by contact name — finds the person, opens their chat, sends the message, then reads the sent message back to confirm it posted.

Input

message required

Text to send as the chat message.

contactName required

Display name of the person whose 1:1 chat to open, as it appears in Teams (e.g. "April Deere").

Output

mid required

Message id of the sent message, read back from the chat pane — an OPAQUE string. Two formats coexist in one thread: older messages carry a 13-digit epoch-ms id (e.g. "1788513273902"), messages sent from mid-September 2026 onward carry a 19-digit id (e.g. "1325909771129090295") that is NOT a timestamp. Never parse mid as a date or assume a digit count; pass it verbatim to edit_chat_message, which treats it as opaque.

sent required
text required

Text of the sent message, read back from the chat pane.

contactName required

FAQ

Send a message in a 1:1 Teams chat by contact name — finds the person, opens their chat, sends the message, then reads the sent message back to confirm it posted.
Ask an AI agent connected to Reduck to run reduck/teams.microsoft.com/send_chat_message, or run it from a terminal with the Reduck CLI: npx @reduck-ai/cli@latest run --script reduck/teams.microsoft.com/send_chat_message
You do not need one. "Send Chat Message" drives the real teams.microsoft.com pages in a browser, so it works whether or not teams.microsoft.com offers an API for this.
Required: contactName, message.
It returns mid, sent, text, contactName.
Yes. It acts as you on teams.microsoft.com: on your own Chrome it reuses your session, and on a Reduck-hosted browser it loads the teams.microsoft.com cookies saved by the Reduck extension.
It makes changes on teams.microsoft.com, like sending, posting, booking or buying something.
Ask an AI agent connected to Reduck to run reduck/teams.microsoft.com/send_chat_message, or run it from a terminal with the Reduck CLI: npx @reduck-ai/cli@latest run --script reduck/teams.microsoft.com/send_chat_message
It is part of Reduck's official curated catalogue.

Related scripts

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Get Chat Messages

Read messages from a 1:1 Teams chat by contact name. Finds the person, opens their chat, and returns every currently-loaded message with sender, ISO timestamp and text. Needs no admin or export permission.

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Edit Chat Message

Edit one of your own previously-sent messages in a 1:1 Teams chat, identified by its message id (mid), replacing its text.

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Report which Microsoft Teams account this browser is signed in as — work or personal: email, name, whether it is a personal (consumer) or work account, and which Teams host it lives on (personal accounts are redirected to teams.live.com). Being signed out is reported as a normal answer (loggedIn false), not an error, so it can be used to check a session — and pick the right Teams host — before running other Teams scripts.

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