Slack Files API

Slack's Files API lets apps programmatically upload, share, and manage files in Slack. Apps can upload binaries (images, docs, code snippets) or register links to external files, then attach them to channels, DMs, or threads with optional captions. The API supports retrieving file metadata and content, listing and filtering files, generating or revoking public share links, and deleting files, with access controlled by app scopes and channel membership. For large uploads, a two-step flow provides an upload URL before finalizing the file, and related Events API notifications (for example, file_created and file_shared) let apps react to changes. Common uses include import/export pipelines, compliance and archiving tools, and integrations with cloud storage.