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slack-file-upload

Upload images, GIFs, videos, and documents to Slack channels via the Slack API.

Updated Aug 27, 2026
Search Tags:#automation#api#slack#upload#bot-token#files:write
One-click install
npx skills add https://github.com/shiftrepo/aws --skill slack-file-upload
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: slack-file-upload
Source: https://github.com/shiftrepo/aws/tree/main/HermesAgent/skills/skills/devops/slack-file-upload
Command: npx skills add https://github.com/shiftrepo/aws --skill slack-file-upload

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Slack's send_message MEDIA attachments are not supported; this skill enables uploading files via Slack API to attach to channels, bypassing limitations.

Core Features & Use Cases

  • Direct file uploads: Upload images, GIFs, videos, and documents directly to Slack channels using the API.
  • Threaded posting support: Optionally post within a thread by supplying thread_ts (if supported; though the SKILL.md mentions thread_ts in example? It shows payload with thread_ts, so it's possible.)
  • Environment & token guidance: Token must be in the environment path as specified.

Quick Start

Upload a local file to a Slack channel using the provided bot token.

Frequently Asked Questions about slack-file-upload

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I upload files to Slack channels via API when media attachments are not supported?▼

Slack API file uploads bypass unsupported media attachments by executing initialization, upload, and completion steps. This process attaches images, GIFs, videos, and documents directly to channels or optional threads using a bot token.

What Slack bot token scopes are required to upload images and videos to channels?▼

A bot token with the files:write scope is required to upload images and videos. The token must be stored as SLACK_BOT_TOKEN in the environment path at /root/.hermes/profiles/bedrock-slack/.env.

Can I post uploaded files directly into a specific Slack thread?▼

Yes, you can post uploaded files directly into a Slack thread by supplying the thread_ts parameter in your payload. This targets the specific thread within the channel during the upload process.

What is the process for sending documents to Slack channels using a bot token?▼

Sending documents to Slack channels using a bot token involves a three-step API flow: initialization, upload, and completion. This attaches documents directly to the targeted channel using the files:write scope.

Why does my Slack send_message media attachment fail and how can I bypass it?▼

Slack send_message media attachments fail because they are not supported. Bypass this limitation by using the Slack API to upload files directly to channels, which requires a bot token with the files:write scope.

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