Social / platform API

Slack files.upload API method

Deprecated API method with official replacement upload flow guidance.

StatusDeprecated

Still usablePartial

Action requiredReplace endpoint

Production riskHigh

Current state

Deprecated, passed unverified

Official Slack changelog describes files.upload deprecation and a retirement timeline. Current retirement status should be rechecked before public v0 launch.

Provider: Slack
Deadline: 2025-11-12
Replacement: External upload flow
Last checked: 2026-06-05

Timeline

Lifecycle events

2024-04-09Slack files.upload deprecation announced.
2025-11-12Retirement deadline listed; status is marked passed unverified.

Evidence

Official source

A better way to upload files is here to stay — Slack API

Always verify with official provider documentation before making production changes.