Slack

send_text

Send a plain text message.

Request body:

{
  "user_id": "...",
  "action": "send_text",
  "payload": { "text": "Hello!" },
  "target_app": "slack"
}

provider_response.result shape:

{ "ok": true, "ts": "1234567890.123456", "channel": "..." }

update_message

Edit a previously sent message (needs its ts).

Request body:

{
  "user_id": "...",
  "action": "update_message",
  "payload": { "ts": "1234567890.123456", "text": "Updated" },
  "target_app": "slack"
}

provider_response.result shape:

{ "ok": true, "ts": "..." }

delete_message

Delete a message (needs its ts).

Request body:

{
  "user_id": "...",
  "action": "delete_message",
  "payload": { "ts": "1234567890.123456" },
  "target_app": "slack"
}

provider_response.result shape:

{ "ok": true }

send_blocks

Send a rich Block Kit message.

Request body:

{
  "user_id": "...",
  "action": "send_blocks",
  "payload": { "blocks": [{"type":"section","text":{"type":"mrkdwn","text":"*Bold*"}}], "fallbackText": "Bold" },
  "target_app": "slack"
}

provider_response.result shape:

{ "ok": true, "ts": "..." }

get_history

Fetch recent messages in a channel.

Request body:

{
  "user_id": "...",
  "action": "get_history",
  "payload": { "limit": 10 },
  "target_app": "slack"
}

provider_response.result shape:

{ "ok": true, "messages": [...] }

"not_in_channel"

Cause: The bot hasn't been added to the channel it's trying to post in.

Fix: In Slack, type /invite @YourBotName in that channel.

"invalid_auth" or "token_revoked"

Cause: Bot token is wrong, expired, or the app was reinstalled (which issues a new token).

Fix: Get the current Bot User OAuth Token from Slack App settings and update your Connections page.

"channel_not_found"

Cause: user_id (channel ID) is wrong.

Fix: Right-click the channel → View channel details → copy the ID at the bottom.