app.apiguru/amazon-data

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

  pass25% of grade

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

  Scanned 184 text field(s); no instruction-injection patterns found. PASS = no static red flag. A server can serve different tool descriptions at runtime (the rug-pull class), which static scanning cannot see.

• Supply chain

  pass25% of grade

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

  repository linkage verified

• Credential hygiene

  pass15% of grade

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

  Reads secrets from the environment (e.g. bin/apiguru-mcp.mjs) — the recommended intake shape. PASS = no static red flag; static analysis cannot prove the code honors env-based secret handling at runtime.

• Permission scope

  fail15% of grade

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

  HIGH: shell/exec capability is incongruent with a read-only declared purpose (tools look like lookup/read-only but source imports command execution). discloses shell/exec capability: bin/apiguru-mcp.mjs: imports child_process and calls exec/spawn Capability DISCLOSURE, not a verdict: static analysis sees the primitive is present and reachable, not whether its use is attacker-controlled.

• 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 1.1.20 (patch bump): tool "product_reviews" description changed (wording only, no injection pattern); tool "search" description changed (wording only, no injection pattern); tool "search" gained input property(ies): deal_type; tool "best_sellers" description changed (wording only, no injection pattern); tool "deals" description changed (wording only, no injection pattern); tool "deals" gained input property(ies): min_price, max_price, min_discount, max_discount, prime_exclusive; tool "seller_products" description changed (wording only, no injection pattern); tool "seller_products" gained input property(ies): query, sort_by, category_id, min_price, max_price, product_condition, brand, today_deals, deal_type; tool "seller_reviews" description changed (wording only, no injection pattern); new capability primitive(s) in source: child_process; new hardcoded outbound host/BCC destination(s): apiguru.app, docs.astral.sh, github.com, mcp.apiguru.app.

• Transport config

  pass10% of grade

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

  remote endpoint "https://mcp.apiguru.app/mcp" uses TLS (https); remote endpoint uses OAuth (strongest auth mode)