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38/100
18 hours ago

slack-stdio-mcp

Local MCP stdio bridge to Slack's hosted MCP server, enabling agents to use Slack tools (send messages, search, history, canvas, etc.) via local OAuth and token refresh.

→ epdlr/slack-stdio-mcp· listed on glama

Warning. Serious findings were identified. Review the full report before connecting. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

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Who stands behind it

epdlr

Source: Glama

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Glama

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// key findings
🚨
Secret credentials may flow to a network call
1 flow detected: SLACK_OAUTH_PORT. We can’t prove the destination matches the brand the credential belongs to.
🔐
You'll be asked for 4 credentials: SLACK_CLIENT_SECRET, SLACK_MCP_TOKEN, SLACK_TOKEN, SLACK_USER_TOKEN
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configSLACK_CLIENT_IDclient-id <id> OAuth app id (default: Claude partner)
🔐 secretSLACK_CLIENT_SECRETclient-secret <s> Confidential apps only
🔐 secretSLACK_MCP_TOKENInject token --token /
configSLACK_OAUTH_HOSToauth-host <host> Redirect host (localhost)
configSLACK_OAUTH_PATHoauth-path <path> Redirect path (/callback)
configSLACK_OAUTH_PORToauth-port <port> Loopback port (3118)
configSLACK_OAUTH_TIMEOUT_MSStartup OAuth waits up to (default 180000). On
🔐 secretSLACK_TOKEN
🔐 secretSLACK_USER_TOKEN
// quality suggestions

Shell command execution

1 child_process/subprocess call in production code — runs shell commands (src/oauth-flow.mjs:335)

Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.

Secrets never reach shell commands

1 secret value passed to shell commands — possible command injection

Never pass secrets through shell commands. Use library APIs that accept credentials as arguments.

Secrets not logged

4 secret values sent to console.log

Redact or omit secret values from log output.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 3 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Verified](https://m8ven.ai/badge/mcp/epdlr-slack-stdio-mcp-uovnkn?variant=verified)](https://m8ven.ai/mcp/epdlr-slack-stdio-mcp-uovnkn)
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commit: 86bc253d6d336561be98900a62f84523b0e3f629
code hash: 84b2659edfb15b505a73857c4bdaeafa0b08b25b18fff0b0a5259cc45ef92c37
verified: 8/19/2026, 3:28:34 AM
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