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Slack ACTION

List Members in Channel

Retrieve members of a channel. Accepts a channel ID (preferred — resolves instantly) or NAME (e.g. general or #general), resolved by scanning up to 5 pages (~5,000 channels) of the workspace's channel list — a name beyond that bound will not be found. See the documentation
  • Action
  • Read only
  • OAuth
  • SDK
  • MCP

IMPLEMENTATION

Call this tool

Connect a user's Slack account once, then configure and run List Members in Channel from your backend or agent.

import { PipedreamClient } from "@pipedream/sdk"

const pd = new PipedreamClient({
  projectId: process.env.PIPEDREAM_PROJECT_ID!,
  clientId: process.env.PIPEDREAM_CLIENT_ID!,
  clientSecret: process.env.PIPEDREAM_CLIENT_SECRET!,
  projectEnvironment: "production",
})

const result = await pd.actions.run({
  id: "slack_v2-list-members-in-channel",
  externalUserId: "{external_user_id}", // any stable ID for this user in your system
  configuredProps: {
    slack_v2: { authProvisionId: "apn_xxxxxxx" },
    conversation: "Channel",
    returnUsernames: true,
  },
})

console.log(result)

SCHEMA

Inputs

Pipedream supplies the connected account. Your application provides the operation-specific values below. Dynamic inputs are resolved against that user's account.

List Members in Channel inputs
Property Type Description
conversation Channel string
Prefer a channel ID (e.g. C1234567890) — use List Channels to look it up; it resolves instantly. A channel NAME (e.g. general or #general) is also accepted, but resolving it scans up to 5 conversations.list pages (~5,000 channels), which is slow and, on large workspaces, can be rate-limited or fail with a ConfigurationError if the channel is beyond that bound — pass the ID whenever you have it. Depending on the action, this may also accept a user ID (opens a direct message) or a group DM ID — use Find User by Email / Find User by ID to resolve a user ID, or List Group Conversations for group DM IDs.
Required
returnUsernames Return Usernames boolean
Optionally, return usernames in addition to IDs. The username may be null for members whose name cannot be resolved, such as external (Slack Connect) users.
Optional
pageSize Page Size integer
The number of results to include in a page. Default: 250
Optional
numPages Number of Pages integer
The number of pages to retrieve. Default: 1
Optional

REFERENCE

Tool details

Behavior hints are published with the component in the Pipedream registry and surface as MCP tool annotations, so an agent can reason about a tool before it calls it.

Registry key
slack_v2-list-members-in-channel
Version
0.1.6
App
Slack
Authentication
OAuth
Read-only
Yes
Destructive
No
Open world
Yes