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Slack MCP Server

by piekstra

update_message

Modify an existing Slack message by updating its text or Block Kit formatting. Specify the channel ID, message timestamp, and new content to ensure accurate updates.

Instructions

Update an existing Slack message.

Args: channel: Channel ID where the message exists ts: Timestamp of the message to update text: New message text (fallback text for notifications) blocks: JSON string of Block Kit blocks for rich formatting

Input Schema

NameRequiredDescriptionDefault
blocksNo
channelYes
textYes
tsYes

Input Schema (JSON Schema)

{ "properties": { "blocks": { "anyOf": [ { "type": "string" }, { "type": "null" } ], "default": null, "title": "Blocks" }, "channel": { "title": "Channel", "type": "string" }, "text": { "title": "Text", "type": "string" }, "ts": { "title": "Ts", "type": "string" } }, "required": [ "channel", "ts", "text" ], "type": "object" }

MCP directory API

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curl -X GET 'https://glama.ai/api/mcp/v1/servers/piekstra/slack-mcp-server'

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