Enables running an MCP server on Cloudflare Workers with OAuth authentication, providing tools like math and xkcd.
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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hemanth
Source: Glama
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Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
Hono JWT Middleware's JWT Algorithm Confusion via Unsafe Default (HS256) Allows Token Forgery and Auth Bypass
Hono Improper Authorization vulnerability
Hono vulnerable to arbitrary file access via serveStatic vulnerability
@cloudflare/workers-oauth-provider missing validation of redirect_uri on authorize endpoint
Cloudflare Agents is Vulnerable to Reflected Cross-Site Scripting in the AI Playground's OAuth callback handler
MCP_CLIENT_IDThe OAuth client ID. Defaults to test-client.MCP_CLIENT_SECRETThe OAuth client secret. Defaults to test-secret.MCP_SERVER_URLThe base URL of the MCP server (e.g., http://localhost:8787 or your deployed worker URL). Defaults to http://localhost:8787.Tool 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
2/2 tools missing one or more hints — add (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); xkcd (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint). 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.
Tool inputs are validated
1/2 tool handlers declare input schemas (50%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
Only 0/2 tool handlers wrap calls in try/catch (0%)
Wrap each tool handler body in try/catch and return a structured error response.
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, 3 high severity in production deps — hono@4.7.4 (high), hono@4.7.4 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
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