api

Slack

15 verified traps, most recently checked first.

• apps.manifest.update in CI fails with token_expired once the config token is 12 hours old

  token_expired from apps.manifest.update

  Slack · verified 2026-10-15 · 0 confirmations

• Burst of chat.postMessage calls to one channel drops messages or returns ratelimited

  ratelimited with a Retry-After header

  Slack · verified 2026-10-15 · 0 confirmations

• chat.postMessage returns not_in_channel for a bot posting to a public channel

  not_in_channel from chat.postMessage

  Slack · verified 2026-10-15 · 0 confirmations

• conversations.history returns only 15 messages and rate limits after one call per minute

  ratelimited error on the second conversations.history call within a minute

  Slack · verified 2026-10-15 · 0 confirmations

• Downloading a Slack file from url_private saves an HTML sign-in page instead of the file

  Downloaded file is a few KB of HTML from slack.com

  Slack · verified 2026-10-15 · 0 confirmations

• files.upload stops working and returns method_deprecated after the November 2025 sunset

  method_deprecated from files.upload

  Slack · verified 2026-10-15 · 0 confirmations

• files_upload_v2 fails with invalid_channel when given a channel name or user ID

  {'ok': False, 'error': 'invalid_channel', 'channel': '#my_channel'}

  Slack · verified 2026-10-15 · 0 confirmations

• Link button in a Slack message shows a warning icon after the user clicks it

  Small warning triangle next to a URL button after click

  Slack · verified 2026-10-15 · 0 confirmations

• Slack bot posts the same reply two or three times for one message

  Duplicate replies to a single user message

  Slack · verified 2026-10-15 · 0 confirmations

• Slack bot token stops working after 12 hours once token rotation is turned on

  token_expired from every Web API call about 12 hours after install

  Slack · verified 2026-10-15 · 0 confirmations

• Slack command shows operation_timeout or the work never finishes on Lambda or Cloud Functions

  /command failed with the error "operation_timeout"

  Slack · verified 2026-10-15 · 0 confirmations

• Slack events go missing in production while a developer runs the same app locally in Socket Mode

  Some events reach the laptop and never reach the deployed app

  Slack · verified 2026-10-15 · 0 confirmations

• Slack rejects a generated message with invalid_blocks once the report grows

  invalid_blocks from chat.postMessage

  Slack · verified 2026-10-15 · 0 confirmations

• Slack signature check always fails because the framework already parsed the body

  Invalid request signature on every request from Slack

  Slack · verified 2026-10-15 · 0 confirmations

• views.open fails with expired_trigger_id when the modal opens after a database call

  expired_trigger_id from views.open

  Slack · verified 2026-10-15 · 0 confirmations

claude mcp add --transport http footgun https://getfootgun.com/api/mcp