Claude Code, Skill
Stackguardian Mcp
One-command MCP setup and ready-to-use agent skills for Claude Code, Cursor, Codex and more.
Compatibility: Not stated.
Grade C
One Medium finding. Read the report before installing.
Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.
SECRETS_PATH_CREDENTIAL
Why this grade
- SECRETS_PATH_CREDENTIAL Medium
Mentions a credential store path (~/.ssh, id_rsa, .npmrc, .aws/credentials, credentials.json, .netrc).
src/sg/credentials.ts, line 14
const CREDENTIALS_FILE = "credentials.json";
Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.
Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.
What was checked
Plain notes from the hygiene checks.
Permissions
Pass
No shell or command execution found, and no extra permission was declared.
Install and update
Concern
dependencies are not pinned. The docs document an installer that pipes a download into a shell. README documents an installer that pipes a download into a shell.
INSTALL_UNPINNED INSTALL_DOCUMENTED_INSTALLER
CHANGELOG.md, line 31
s download from `dl.stackguardian.io`: `curl -fsSL https://dl.stackguardian.io/add-sg-mcp/install.sh | sh`, and `irm https://dl.stackguardian.io/
README.md, line 68
curl -fsSL https://dl.stackguardian.io/add-sg-mcp/install.sh | sh
README.md, line 243
curl -fsSL https://dl.stackguardian.io/add-sg-mcp/install.sh | sh -s -- --region eu -a claude-code
Show more
install.sh, line 4
# curl -fsSL https://dl.stackguardian.io/add-sg-mcp/install.sh | sh
install.sh, line 5
# curl -fsSL https://dl.stackguardian.io/add-sg-mcp/install.sh | sh -s -- --region eu -a claude-code
package.json, line 61
@clack/prompts
Network
Concern
can reach a host that is not written as a fixed address.
NETWORK_NO_FIXED_HOST
install.sh, line 45
# download URL FILE [progress]: with "progress", curl draws a bar in a terminal.
install.sh, line 47
if command -v curl >/dev/null 2>&1; then
install.sh, line 49
curl -fL --retry 3 --progress-bar -o "$2" "$1"
Show more
install.sh, line 51
curl -fsSL --retry 3 -o "$2" "$1"
install.sh, line 53
elif command -v wget >/dev/null 2>&1; then
install.sh, line 54
wget -q -O "$2" "$1"
install.sh, line 56
fail "curl or wget is required"
Secrets
Concern
reads a credential or environment file.
SECRETS_PATH_CREDENTIAL SECRETS_PATH_DOTENV
src/sg/credentials.ts, line 14
const CREDENTIALS_FILE = "credentials.json";
.gitignore, line 35
# Environment
.gitignore, line 36
.env
Show more
README.md, line 278
3. The browser returns a one-time code to the loopback callback, and the CLI exchanges it for a grant token. The token is stored in `~/.config/add-sg-mcp/credentials.json` (mode `0
docs/superpowers/plans/2026-09-08-sg-mcp-installer.md, line 22
- Credentials at `$XDG_CONFIG_HOME/add-sg-mcp/credentials.json`, dir `0700`, file `0600`; the key is never printed unmasked.
docs/superpowers/plans/2026-09-08-sg-mcp-installer.md, line 105
export function getCredentialsPath(): string; // join(XDG_CONFIG_HOME|~/.config, "add-sg-mcp", "credentials.json")
docs/superpowers/plans/2026-09-08-sg-mcp-installer.md, line 269
- [ ] e2e tests (subprocess with sandbox HOME, `--token sgu_testtesttest1234 --org demo-org --api-base https://api.app.stackguardian.io/api/v1 -y --all`): claude-code `~/.claude.js
docs/superpowers/specs/2026-09-08-sg-mcp-installer-design.md, line 123
9 save credentials.json (0600)
Agent instructions
Pass
No instruction to ignore earlier instructions or to hide a step.
Obfuscation
Pass
No encoded or minified payload found.
Licence
Pass
A licence file is present (LICENSE).
Maintainer activity
Pass
The latest commit is within the last 365 days.
Note
Hygiene check of commit f0bc65e4ecc8. dependencies are not pinned. The docs document an installer that pipes a download into a shell. README documents an installer that pipes a download into a shell. can reach a host that is not written as a fixed address. reads a credential or environment file.
Date and source
Date checked:
github.com
Commit graded: f0bc65e4ecc8c4378a0a0ea7a3fafefd003701be
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