Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Temporal Mcp

temporal-mcp is a read-only MCP server that gives AI agents access to the Temporal namespaces listed in its config, over streamable HTTP or, for one developer, over stdio.

Compatibility: Not stated.

Grade B

Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.

Graded by PlugVetRubric v2

Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.

NETWORK_NO_FIXED_HOST SECRETS_PATH_UNCONFIRMED PERMISSION_SHELL_DECLARED INSTALL_DOCUMENTED_INSTALLER

Why this grade

  • NETWORK_NO_FIXED_HOST Low

    Makes a network call whose host is not written as a fixed address.

    install.sh, line 14 fetch() {

  • SECRETS_PATH_UNCONFIRMED Low

    The Secrets check reports a credential or environment file, but no quoted line shows a recognisable path.

    .gitignore, line 3 .claude/

  • PERMISSION_SHELL_DECLARED Note

    Runs shell commands, and the manifest or description says so.

    main_test.go, line 42 out, err := exec.Command("go", append([]string{"build", "-o", bin}, append(buildArgs, ".")...)...).CombinedOutput()

  • INSTALL_DOCUMENTED_INSTALLER Note

    Documentation shows an installer that pipes a download into a shell.

    README.md, line 19 curl -sSfL https://raw.githubusercontent.com/temporalio/temporal-mcp/main/install.sh | sh

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

    Note

    requests shell access. The manifest names this permission.

    PERMISSION_SHELL_DECLARED

    main_test.go, line 42

    out, err := exec.Command("go", append([]string{"build", "-o", bin}, append(buildArgs, ".")...)...).CombinedOutput()

    main_test.go, line 51

    cmd := exec.Command(bin, "--config", configPath)

    main_test.go, line 228

    var transport mcp.Transport = &mcp.CommandTransport{Command: exec.Command(bin, "--stdio", "--config", configPath)}

    Show more

    main_test.go, line 282

    cmd := exec.CommandContext(ctx, buildBinary(t), "--stdio", "--config", configPath)

    main_test.go, line 325

    out, err := exec.Command("go", "list", "-deps", ".").CombinedOutput()

    main_test.go, line 403

    cmd := exec.CommandContext(ctx, bin, tt.args...)

    main_test.go, line 614

    cmd := exec.CommandContext(ctx, bin, "--config", configPath)

  • Install and update

    Note

    README documents an installer that pipes a download into a shell. The docs document an installer that pipes a download into a shell.

    INSTALL_DOCUMENTED_INSTALLER

    README.md, line 19

    curl -sSfL https://raw.githubusercontent.com/temporalio/temporal-mcp/main/install.sh | sh

    install.sh, line 4

    # curl -sSfL https://raw.githubusercontent.com/temporalio/temporal-mcp/main/install.sh | sh

  • Network

    Concern

    can reach a host that is not written as a fixed address.

    NETWORK_NO_FIXED_HOST

    install.sh, line 14

    fetch() {

    install.sh, line 15

    curl --proto '=https' --tlsv1.2 -fsSL "$@"

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_UNCONFIRMED

    .gitignore, line 3

    .claude/

  • 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.

Get the full report on this tool, £49

Note

Hygiene check of commit d6f91abd7a48. requests shell access. The manifest names this permission. README documents an installer that pipes a download into a shell. The docs document 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:

View source

github.com

Commit graded: d6f91abd7a483caba55db0cb1b872548715b3c9c

This link goes to the original host. PlugVet does not host or check what you download from there, and installing it is your own decision and risk.

Read how this letter is chosen