{"id":"kjyy08-slack-mcp-server","name":"slack-mcp-server","af_score":43.8,"security_score":39.5,"reliability_score":15.0,"what_it_does":"MCP server (Java/Spring) that exposes Slack-related tools to an agent, including posting messages, retrieving channel message history with cursor-based paging, uploading files (by path or base64), and scheduling messages for later delivery.","best_when":"You want an MCP-capable agent workflow to interact with Slack using a Bot token and a configured channel context.","avoid_when":"You cannot safely run and manage a custom MCP server process, or you cannot tolerate increased token/size usage when using base64 uploads.","last_evaluated":"2026-04-04T19:35:58.873379+00:00","has_mcp":true,"has_api":false,"auth_methods":["Slack Bot token (xoxb-...)"],"has_free_tier":false,"known_gotchas":["Base64 file upload can increase token usage; prefer absolute-path upload when possible (per README).","Correct paging requires using the provided cursor and message count; behavior/limits are not specified in the README.","Scheduled message timing details, cancellation, and idempotency semantics are not documented in the provided README."],"error_quality":0.0}