# Slack Web API

> Use this tool when you need to integrate Slack functionality into your application, solving problems such as automating messaging, managing files and users, and creating custom workflows. It provides extensive access to the Slack Web API, accepting inputs like OAuth tokens and Slack app credentials, and outputs data across various API families. Use it in contexts where you require programmatic control over Slack features, such as building custom bots or automating team collaboration tasks.

Canonical page: https://skillsregistry.net/skills/karbassi-slack-web-api  
JSON: https://api.skillsregistry.net/v1/skills/karbassi-slack-web-api

## Description

Provides extensive access to the Slack Web API across all major API families including conversations, messaging, files, users, canvases, lists, reminders, workflows, and calls. Supports both standard OAuth tokens and browser session tokens for accessing undocumented and legacy endpoints. Built on FastMCP 3.0 with the official Slack SDK, requiring Python 3.13+ and a Slack app OAuth token for authentication.

## Trust

- **Trust score (0–1):** 0.82
- **Verification tier:** scanned
- **Last scanned:** 2026-09-19

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** browser-automation
- **Updated:** 2026-09-19

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/karbassi-slack-web-api)
- **Repository:** <https://github.com/karbassi/slack-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "karbassi-slack-web-api"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/karbassi-slack-web-api` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/karbassi-slack-web-api/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt