slack-fast-mcp
by jeffmm
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| SLACK_MCP_CACHE_TTL | No | Cache TTL in seconds or duration string (1h, 30m, 3600s) | 3600 |
| SLACK_MCP_LOG_LEVEL | No | Log level (debug, info, warning, error) | info |
| SLACK_MCP_XOXB_TOKEN | No | Bot OAuth token (priority 2) | |
| SLACK_MCP_XOXC_TOKEN | No | Browser session token (priority 3, requires XOXD too) | |
| SLACK_MCP_XOXD_TOKEN | No | Browser d cookie value (priority 3, requires XOXC too) | |
| SLACK_MCP_XOXP_TOKEN | No | User OAuth token (priority 1) | |
| SLACK_MCP_USERS_CACHE | No | Path to persistent users cache file | |
| SLACK_MCP_REACTION_TOOL | No | Enable reaction tools (true/1 for all, comma-separated channel IDs for allowlist, !-prefixed channel IDs for blocklist) | |
| SLACK_MCP_CHANNELS_CACHE | No | Path to persistent channels cache file | |
| SLACK_MCP_ATTACHMENT_TOOL | No | Enable attachment download tool (true/1 for all, comma-separated channel IDs for allowlist, !-prefixed channel IDs for blocklist) | |
| SLACK_MCP_ADD_MESSAGE_MARK | No | Mark channel as read when sending a message (true/false) | false |
| SLACK_MCP_ADD_MESSAGE_TOOL | No | Enable message posting tool (true/1 for all, comma-separated channel IDs for allowlist, !-prefixed channel IDs for blocklist) | |
| SLACK_MCP_ADD_MESSAGE_UNFURLING | No | Control link unfurling in sent messages |
Capabilities
Server capabilities have not been inspected yet.
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
No tools | |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
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