MCP Apps Server
An MCP server template integrated with the OpenAI Apps SDK for building ChatGPT-compatible widgets with automatic tool registration. It provides a suite of interactive UI components and ecommerce examples for creating type-safe, theme-aware widgets.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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Pederzh
Source: Glama
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Install from
The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
React Router's vendored turbo-stream v2 allows arbitrary constructor invocation via TYPE_ERROR deserialization leading to Unauth RCE
React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets
React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint
React Router: Unauthenticated Denial of Service via Inefficient Route Matching
React Router: RSC Mode CSRF Bypass Allows Action Execution Before 400 Response
MCP_URLTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
5/5 tools missing one or more hints — get-spot-prices (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); search-products (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get-product-detail (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +2 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
License file
No license file
Add a LICENSE file (MIT, Apache-2.0, etc.).
Tests exist
No test files found
Add tests that exercise each declared tool.
Production dependencies are patched
0 critical, 6 high severity in production deps — react-router@7.12.0 (high), react-router@7.12.0 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
Dev dependencies
3 critical/high in dev-only deps (does not ship to users)
Upgrade dev dependencies when convenient.
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