Slack is the leading workplace messaging platform with a comprehensive API for building bots, automations, and integrations. Supports messaging, file sharing, reactions, threads, modals, and interactive components. Essential for workplace automation.
Connect via PincerAPI
Use our proxy to call Slack with your PincerAPI key. No separate signup needed.
# Get instructions for Slack
curl -H "Authorization: Bearer YOUR_PINCER_KEY" \
https://pincerapi.com/api/v1/apis/slack/instructions
# Call through PincerAPI proxy
curl -H "Authorization: Bearer YOUR_PINCER_KEY" \
"https://pincerapi.com/api/v1/connect/slack/your/endpoint/here"Direct Setup
Endpoints
/chat.postMessageSend a message to a Slack channel or DM.
💡 Use channel ID not name. Include text as fallback even when using blocks. thread_ts for threaded replies.
/conversations.listList channels the bot has access to.
💡 Use to find channel IDs needed for posting. Paginate with cursor from response_metadata.next_cursor.
/users.listList all users in the workspace.
💡 Use to look up user IDs for DMs or mentions. Paginate via cursor.
/reactions.addAdd an emoji reaction to a message.
💡 Use for lightweight acknowledgment. Emoji name without colons (e.g., "thumbsup" not ":thumbsup:").
/files.uploadV2Upload a file to Slack channels.
💡 Use uploadV2 (not legacy upload). For binary files, use multipart/form-data.
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