sh.releases/mcp

What we checked

Six static checks, weighted by risk. Every result reflects only what could be observed in the published package and repository — never intent.

• Injection surface

  warn25% of grade

  Tool descriptions/manifest scanned for instruction-injection patterns (imperatives at the model, hidden text, 'ignore previous', data-exfil URLs).

  tool "search" param "domain" description: off-vendor URL in a description (vercel.com); capability text should not name where data goes. tool "lookup_domain" description: off-vendor URL in a description (vercel.com); capability text should not name where data goes.

• Supply chain

  warn25% of grade

  Package provenance: namespace verification, repo linkage, maintainer count, account age, postinstall scripts, typosquat distance.

  dependency "@modelcontextprotocol/client" is edit-distance 2 from popular package "@aws-sdk/client-s3" (typosquat candidate); dependency "@modelcontextprotocol/server" is edit-distance 1 from popular package "semver" (typosquat candidate); dependency "@releases/lib" is edit-distance 2 from top-20 package "tslib" (typosquat candidate); dependency "ai" is edit-distance 2 from popular package "chai" (typosquat candidate)

• Credential hygiene

  pass15% of grade

  How the server takes secrets (env vs plaintext config vs hardcoded); secrets appearing in tool schemas.

  No hardcoded secrets, secret-shaped tool parameters, or leaked keys found. PASS = no static red flag; static analysis cannot prove the code honors env-based secret handling at runtime.

• Permission scope

  pass15% of grade

  Declared tools vs. breadth (filesystem, network, exec); flags shell-exec and unbounded filesystem access.

  No shell-exec, unbounded/sensitive filesystem, or download-and-run primitives found in scanned source. PASS = no static red flag. Static scanning is blind to code fetched or executed at runtime.

• Version behavior

  fail10% of grade

  Diff of tool definitions between versions; new permissions or changed descriptions in a patch release (the postmark-mcp class).

  vs prior 0.12.0 (minor bump): new hardcoded outbound host/BCC destination(s): api.releases.sh, gateway.ai.cloudflare.com, mcp-staging.releases.sh, mcp.releases.localhost, mcp.releases.sh.

• Transport config

  warn10% of grade

  Remote servers: TLS and auth mode (none/token/OAuth). Local servers: whether the manifest indicates it phones home.

  sends telemetry to third-party SDK (PostHog) — disclosure, verify opt-in