PipedreamHQ/pipedream

[ACTION] Slack "list_replies" tool MCP needs to be improved

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#17,939 opened on Aug 4, 2025

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Description

Using my AI app to get Slack user's response always fails.

The tool list_replies requires a timestamp to fetch message responses, but this isn't possible (to determine the timestamp) when an external app connects via MCP. Therefore, we need a tool to retrieve replies from a specific Slack channel without relying on the timestamp or use additional code to parse the list within a loop.

Contributor guide

Research direction
Research Slack API methods for retrieving thread replies without a timestamp. Then review the list replies tool code and adapt it to accept an optional timestamp or use a different approach.
Tech stack
javascript
Domain
api
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitJavaScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65