About Slack MCP Extender
Slack MCP Extender is an MCP server published by nlink-jp in the Browser category: transparent proxy for the official Slack MCP with file upload/download extension tools.
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Install
From source
git clone https://github.com/nlink-jp/slack-mcp-extenderThis server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.
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Releases
v0.5.1v0.5.1 · 22 Sep 2026Fixed A path's place is nlink-jp/pathguard v0.3.0's `Where`, the end of its walk. It was the last of pathguard's forms, which is a middle hop when a chain of links comes back to a spelling it already passed.
v0.5.0v0.5.0 · 22 Sep 2026Security Another spelling of a refused place got past v0.4.1 and earlier. APFS folds case and the places were compared as strings, so `work_dir=~/.SSH`, `GCLOUD/credentials.db` under `work_dir=~/.config`, and `WS.STATE/tokens.json` under…
v0.4.1v0.4.1 · 21 Sep 2026No change to the server's behaviour: the credential floor, the containment policy and every tool are exactly as in v0.4.0. This release publishes test coverage and a release-tooling fix. Security The credential floor's list is now held by…
v0.4.0v0.4.0 · 21 Sep 2026Security The credential denial list is now applied to the file a call names, not only to the `work_dir` it was resolved under. ADR-021 §7 states the list is "a floor, not a boundary", and a floor tested only against the directory…
v0.3.2v0.3.2 · 13 Sep 2026Added `TestEveryRequiredNameIsDeclared` — a schema that lists a name in `required` without declaring it in `properties` makes a strict client refuse the whole tool list (Vertex AI: "schema at top-level requires unspecified property").…