HopperPyMCP
HopperPyMCP is a Python MCP (Model Context Protocol) server intended to be installed as a Hopper disassembler script/plugin. It exposes Hopper analysis capabilities as MCP tools, including binary/document management, segment and address information, regex-based name/string search, disassembly and decompilation, call graph generation, cross-reference/reference analysis, and annotation operations (comments/names/types) on the current Hopper document.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
No authentication/authorization is documented; the MCP server is referenced at localhost, which reduces exposure but does not replace app-layer security for host-local threats. No TLS or HTTPS behavior is described (likely plain localhost). Dependency hygiene is not verifiable from provided text; MIT-licensed Python with fastmcp dependency suggests typical Python dependency risk. README does not discuss secret handling; likely no secrets are required, but confirm that logs/scripts do not emit environment-sensitive data during caching/analysis.
⚡ Reliability
Best When
You have Hopper installed and want a local MCP endpoint to let an AI agent drive Hopper analysis and annotation interactively.
Avoid When
You need strong network-level security controls, OAuth scopes, or a documented rate limiting/auth scheme suitable for remote deployment; also avoid if you cannot control the local environment where the MCP server runs.
Use Cases
- • Building an agent-assisted workflow for reversing binaries inside Hopper via MCP tools
- • Programmatically retrieving disassembly/decompiled output for procedures
- • Generating call graphs and exploring references/cross-references
- • Performing regex-based discovery of symbols/names and strings within segments
- • Automating documentation/annotation tasks in Hopper (set comments, names, mark data types)
Not For
- • A cloud-hosted, internet-facing API service for general users (it appears to be local/localhost-oriented)
- • Use as a secure multi-tenant SaaS endpoint requiring enterprise IAM
- • Applications that require REST/GraphQL/SDK support out of the box (it is MCP-focused)
Interface
Authentication
No authentication mechanism (API keys/OAuth) is described. The README indicates a localhost MCP server, implying access control may rely on local network/host protections rather than application-layer auth.
Pricing
Open-source (MIT license per repo metadata). No pricing described.
Agent Metadata
Known Gotchas
- ⚠ Requires Hopper Python prompt steps (optionally cache_strings()) before launch_server for performance
- ⚠ Runtime speed may depend heavily on whether string caching is performed
- ⚠ Localhost endpoint assumes the agent/client can reach http://localhost:42069/mcp/ from the running environment
- ⚠ Installation may fail if fastmcp import/Python environment differs; troubleshooting suggests environment-specific dependency installation
Alternatives
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Scores are editorial opinions as of 2026-03-30.