MCP Nexus
A unified search and extraction MCP server hosted on Cloudflare Workers that integrates Tavily and Brave Search APIs with automatic API key rotation. It features secure, encrypted storage for keys using Cloudflare D1 and provides an admin interface for managing client tokens and search configurations.
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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xiaw1024
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.
These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.
tavily_searchSearch the web for current information on any topic. Use for news, facts, or data beyond your knowledge cutoff. Returns snippets and source URLs.
tavily_extractExtract content from URLs. Returns raw page content in markdown or text format.
tavily_crawlCrawl a website starting from a URL. Extracts content from pages with configurable depth and breadth.
tavily_mapMap a website's structure. Returns a list of URLs found starting from the base URL.
tavily_researchPerform comprehensive research on a given topic or question. Use this tool when you need to gather information from multiple sources to answer a question or complete a task. Returns a detailed response based on the research findings.
brave_web_searchPerforms a web search using the Brave Search API. Use for general web searches for information, facts, and current topics. Returns a JSON array of results.
brave_local_searchSearch for local businesses and places using the Brave Search API. Implementations commonly fall back to web search if local results are unavailable. Returns a JSON array of results.
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
When Vitest UI server is listening, arbitrary file can be read and executed
Vitest allows Remote Code Execution when accessing a malicious website while Vitest API server is listening
Hono JWK Auth Middleware has JWT algorithm confusion when JWK lacks "alg" (untrusted header.alg fallback)
hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard
Hono JWT Middleware's JWT Algorithm Confusion via Unsafe Default (HS256) Allows Token Forgery and Auth Bypass
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
7/7 tools missing one or more hints — tavily_search (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); tavily_extract (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); tavily_crawl (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +4 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.).
Tool test coverage
Only 2/7 tools referenced in tests (29%)
Write tests that reference each tool by name so every tool has at least one test.
Production dependencies are patched
0 critical, 5 high severity in production deps — hono@4.7.0 (high), hono@4.7.0 (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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