fastmcp-creator
Use when building, extending, or debugging FastMCP v3 Python MCP servers. Activates on FastMCP tool/resource/prompt creation, provider and transform implementation (CodeMode, Tool Search), auth setup (MultiAuth, PropelAuth), client SDK usage, nginx reverse proxy deployment, Prefab Apps, and testing. Grounded in local v3.1 docs — zero speculation.
94
92%
Does it follow best practices?
Impact
Pending
No eval scenarios have been run
Advisory
Suggest reviewing before use
Security
2 findings — 2 medium severity. This skill can be installed but you should review these findings before use.
W011: Third-party content exposure detected (indirect prompt injection risk)
What this means
The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.
Why it was flagged
Third-party content exposure detected (high risk: 0.90). The skill's instructions explicitly describe runtime fetching and inclusion of external, user-provided web resources — e.g., "MCP Resources (@-mentions) Servers can expose resources ... Resources are fetched and included as attachments" in references/claude-code-mcp-integration.md, ProxyProvider examples (create_proxy('http://remote/mcp')) in the providers docs, and app HTML importing scripts from https://unpkg.com in references/apps.md — so untrusted third-party content can be ingested and influence tool behavior.
W012: Unverifiable external dependency detected (runtime URL that controls agent)
What this means
The skill fetches instructions or code from an external URL at runtime, and the fetched content directly controls the agent’s prompts or executes code. This dynamic dependency allows the external source to modify the agent’s behavior without any changes to the skill itself.
Why it was flagged
Potentially malicious external URL detected (high risk: 0.90). The UI resource HTML includes a runtime module import from https://unpkg.com/@modelcontextprotocol/ext-apps@0.4.0/app-with-deps which will be fetched and executed in the app iframe at runtime (remote JS execution required for the app UI), so this external URL executes remote code that the skill depends on.
- Repository
- Jamie-BitFlight/claude_skills
- Commit
11ec483
- Audited
- Security analysis
Is this your skill?
If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.