Slack MCP Server

Instructions

Implementation Reference

• src/tools/channels.ts:27-39 (handler)

  The main handler function that validates input using Zod schema and calls Slack's conversations.info API to fetch channel details.

  export async function getChannelInfo(client: SlackClientWrapper, args: unknown) {
    const params = getChannelInfoSchema.parse(args);
  
    return await client.safeCall(async () => {
      const result = await client.getClient().conversations.info({
        channel: params.channel,
      });
  
      return {
        channel: result.channel,
      };
    });
  }

• src/utils/validators.ts:18-20 (schema)

  Zod schema defining the input validation for the getChannelInfo tool, requiring a channel ID.

  export const getChannelInfoSchema = z.object({
    channel: channelIdSchema,
  });

• src/index.ts:74-86 (registration)

  Registration of the get_channel_info tool in the MCP tools list, including name, description, and input schema for list_tools.

    name: 'get_channel_info',
    description: 'Get detailed information about a specific channel',
    inputSchema: {
      type: 'object',
      properties: {
        channel: {
          type: 'string',
          description: 'Channel ID (e.g., C1234567890)',
        },
      },
      required: ['channel'],
    },
  },

• src/index.ts:416-416 (registration)

  Maps the tool name to its handler function in the call_tool request handler.

  get_channel_info: (args) => channelTools.getChannelInfo(slackClient, args),